A method of making a metal matrix composite ceramic mechanical pump wear part

Abstract

The present application relates to a method for manufacturing mechanical pump parts, in particular to a method for manufacturing metal composite ceramic mechanical pump wear-resistant parts with excellent wear resistance by using a mold cavity shell and hot mixture and hot isostatic pressing, which is used to solve the problems of liquid steel alloy being unable to fill the pores between ceramic particles, ceramic parts being difficult to connect with metal parts, poor impact resistance and poor torsional strength when manufacturing metal-based composite ceramic mechanical pump wear-resistant parts due to the small thickness and large expansion area of mechanical pump parts. The method for manufacturing metal-based composite ceramic mechanical pump wear-resistant parts fills the primary and secondary mixtures in the mixed materials into the forming cavity, injects the molten brazing metal into the forming cavity and the solder compensation bin under high temperature and vacuum, and respectively performs low-pressure active compounding and high-pressure diffusion compounding to manufacture metal composite ceramic mechanical pump wear-resistant parts.

Description

Technical Field

[0001] This invention relates to a method for manufacturing mechanical pump components, specifically a method for manufacturing wear-resistant metal composite ceramic mechanical pump components with excellent wear resistance using a mold cavity shell through hot mixing and hot isostatic pressing. Background Technology

[0002] Currently, centrifugal and axial flow slurry pumps, sand pumps, desulfurization pumps, mud pumps, sewage pumps, corrosion-resistant pumps, dredging pumps, deep water slurry pumps, deep water sand pumps, and various multi-stage slurry pumps used in industries such as mining, metallurgy, chemical industry, power generation, environmental protection, construction, and dredging, all pump various slurries containing particles. As a result, mechanical pump components experience rapid wear, especially centrifugal impellers in centrifugal pumps and axial flow impellers in axial flow pumps. To address these issues, those skilled in the art have attempted to use silicon carbide ceramics, alumina ceramics, and silicon nitride, which possess excellent mechanical properties, high hardness, good oxidation resistance, strong corrosion resistance, excellent abrasion resistance, and low friction coefficient, to manufacture impellers, auxiliary impellers, axial flow impellers, front guard plates, rear guard plates, slurry inlets, and other accessories for mechanical pumps. However, directly using the above materials to manufacture mechanical pump components presents many problems: (1) the shapes of impellers, auxiliary impellers, and axial flow impellers are complex, making them prone to deformation during blank manufacturing; (2) the deformation and cracking rates during sintering are extremely high and cannot be repaired. (3) Due to the limitations of the sintering furnace conditions, it is impossible to sinter large-sized mechanical pump parts using alumina ceramics and silicon carbide ceramic particles.

[0003] For the reasons mentioned above, those skilled in the art have attempted to combine ceramic and metallic materials to obtain high-performance wear-resistant mechanical pump components. A specific method involves loading ceramic particles with a metal-coated surface into a mold, and then injecting molten steel alloy into the mold. However, because mechanical pump components are relatively thin (20–60 mm) but have a large unfolded area (400–3000 mm in diameter), the molten steel alloy cannot fill the pores between the ceramic particles. To date, there have been no reports on wear-resistant mechanical pump components made of metal-based composite ceramic materials.

[0004] Currently, silicon nitride-combined silicon carbide centrifugal slurry pumps exist in practical applications. However, these pumps are difficult to manufacture, have low yield rates, and are difficult to connect with the ceramic parts and metal components. Although these pumps have excellent wear resistance, they have poor impact and torsional resistance. Therefore, current silicon nitride-combined silicon carbide centrifugal slurry pumps suffer from problems such as small diameter (below 500mm), high cost, and low market acceptance.

[0005] Those skilled in the art have also used centrifugal self-propagating technology to manufacture mechanical pump components, but this method has been hampered by difficulties in manufacturing processes and low product quality. Currently, centrifugal self-propagating technology is only suitable for manufacturing ceramic linings for steel pipes. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of manufacturing wear-resistant components for metal-based composite ceramic mechanical pumps, such as the inability of liquid steel alloy to fill the pores between ceramic particles, difficulties in connecting the ceramic part with the metal part, and poor impact and torsional resistance, due to the small thickness and large unfolded area of ​​mechanical pump components. The invention provides a method for manufacturing wear-resistant components for metal-based composite ceramic mechanical pumps.

[0007] To address the shortcomings of the existing technology, the present invention provides the following technical solution:

[0008] A method for manufacturing wear-resistant components for metal-based composite ceramic mechanical pumps, characterized by the following steps:

[0009] Step 1: Fabricate the molding cavity shell and supplementary pressure clamping mold according to the wear-resistant parts of the mechanical pump;

[0010] The molding cavity shell includes a cavity shell bottom, a cavity shell cover, a cavity shell ring, and a core mold. The cavity shell bottom, cavity shell cover, and cavity shell ring constitute an outer shell. The core mold is disposed inside the outer shell, and a molding cavity is formed between the core mold and the inner wall of the outer shell. The cavity shell cover is provided with a vacuum pipe interface base, a molten metal injection pipe interface base, and at least one solder filler base. The solder filler base is provided with a solder filler shell communicating with the molding cavity. The solder filler shell contains a solder filler. The solder filler and the molding cavity are separated by an isolation plug with small holes. The vacuum pipe interface base and the molten metal injection pipe interface base are respectively provided with a vacuum pipe and a molten metal injection pipe. The core mold is made of metal, or of a solvent-soluble material, or of an inner metal and an outer solvent-soluble material, or of an outer metal and an inner solvent-soluble material. The metal is provided with multiple cooling channels. The solvent-soluble material includes soluble chloride particles.

[0011] The solder replenishment pressurization mold includes an upper plate, at least one pressurizing column, and a lower plate. A pressurization cavity is formed between the upper plate, all pressurizing columns, and the lower plate. The pressurization cavity is used to house the forming cavity shell. Temperature control devices are provided in the upper plate and the lower plate. The pressurizing column is used to pressurize the solder replenishment chamber.

[0012] Step 2: Prepare the mixing materials;

[0013] The mixed material comprises structural ceramic particles, metal particles, active solder, and brazing metal in a volume ratio of 4–6.8:0–3:0–1.2:3–4.5; the structural ceramic particles are one or more combinations of alumina, silicon carbide, silicon nitride, quartz, and silane structural ceramic particles, with a particle size of 0.08–4.5 mm; the metal particles are particles with a diameter of 0.3–1.5 mm and / or steel alloy wires with a diameter of 0.2–1 mm and a length of 2–10 mm; the active solder comprises at least one of an active reactive material and an auxiliary brazing material, the active reactive material comprising titanium, titanium alloys, titanium hydride, aluminum, and aluminum alloys, and the auxiliary brazing material comprising copper, copper alloys, boron, and boron oxide; the brazing metal comprises aluminum and a series of aluminum alloys, and copper and a series of copper alloys.

[0014] Step 3: Fabricate wear-resistant parts for the mechanical pump;

[0015] The brazing metal in the mixed material is placed into the hot melt system, and other materials are loaded into the molding cavity. Under vacuum and a preset temperature, the molten brazing metal is injected into the molding cavity, and the base of the vacuum pipe interface and the base of the molten liquid injection pipe interface are sealed. Then, the mixed material in the molding cavity is subjected to heat preservation and pressure composite molding using hot isostatic pressing technology. After cooling, the molding cavity shell is removed according to preset requirements to obtain the wear-resistant part of the mechanical pump. The preset temperature is 20 to 450°C above the highest melting point of the brazing metal in step 3.

[0016] Furthermore, step 3 specifically includes:

[0017] Step 3.1: Place the brazing metal into the hot melt system and connect the hot melt system to the molding cavity through the melt injection pipe; at the same time, mix other materials evenly to make a preliminary compound mixture, fill the molding cavity with the preliminary compound mixture, vibrate and compact it, and then seal the molding cavity.

[0018] Step 3.2: Heat the molding cavity to remove steam. When the temperature reaches the preset vacuum temperature of 250℃~450℃, extract the gas in the molding cavity through the vacuum pipe to make the vacuum degree in the molding cavity higher than 3~30KPa.

[0019] Step 3.3: Adjust the temperature of the molding cavity to the preset injection temperature of 700℃~750℃, and simultaneously adjust the brazing metal in the hot melt system to 750℃~920℃. Pressurize and inject the brazing metal into the molding cavity to complete the uniform thermal mixing of the mixed materials. Seal the base of the air extraction pipe interface and the base of the melt injection pipe interface.

[0020] Step 3.4: Place the molding cavity shell into the pressurization chamber;

[0021] Step 3.5: Adjust the temperature of the molding cavity to the preset composite temperature of 700℃~750℃ according to the preset temperature control curve, apply pressure of 0.2MPa~0.3MPa, and keep warm for 10~15 minutes;

[0022] Step 3.6: Slowly pressurize the solder filling chamber through the pressure column, so that the liquid brazing metal in the solder filling chamber flows into the forming cavity under pressure and the pressure is evenly transmitted in the forming cavity to generate thermal isostatic pressure; control the applied pressure to make the thermal isostatic pressure in the forming cavity equal to 15-20 MPa, and hold at 700℃-980℃ for 1-2 minutes to complete the diffusion composite;

[0023] Then, the solder filler chamber on the forming cavity is pressurized asynchronously, and the temperature is lowered according to the set cooling curve. During the cooling, the pressure inside the forming cavity remains unchanged, so that the forming cavity cools down from the part away from the solder filler chamber first. When the temperature of the forming cavity drops below the melting point of the brazing metal, the pressure is removed, the filler pressurization mold is opened, and the forming cavity shell is taken out.

[0024] Step 3.7: Remove the molding cavity shell and core mold, and after repair, obtain the wear-resistant parts of the mechanical pump.

[0025] Furthermore, in step 1, the wear-resistant component of the mechanical pump is an impeller;

[0026] The core mold includes an inner support, a central support, an outer support, multiple blades, multiple blade heads, and a shaft seat; the inner support and the shaft seat are respectively located at the center of the cavity bottom and the cavity cover, the central support is located on the top surface of the inner support, the top surface, bottom surface, and outer side wall of the outer support are in contact with the cavity cover, the cavity bottom, and the cavity ring, respectively, and the inner end of each blade is connected to the central support through the blade head, and the outer end is connected to the inner side wall of the outer support;

[0027] Step 1 specifically involves:

[0028] Step 1.1: Fabricate the molded cavity shell;

[0029] Step 1.1.1: Fabricate the following components according to the wear-resistant parts of the mechanical pump: chamber bottom, chamber cover, chamber ring, filler chamber, inner support, center support, outer support, shaft seat, blade, and multiple blade heads.

[0030] Make a replenishment chamber base, an air extraction pipe interface base, and a molten liquid injection pipe interface base on the cavity cover;

[0031] Step 1.1.2: Heat the base of the filler chamber, the base of the evacuation pipe interface, and the base of the molten liquid injection pipe interface on the cavity cover respectively. Install the filler chamber shell, the filler chamber, the evacuation pipe interface, and the molten liquid injection pipe interface respectively by interference fit, and then weld the connection with copper solder.

[0032] Apply a release agent to the cavity bottom, cavity cover, cavity ring, inner support, central support, outer support, shaft seat, blade, and multiple blade heads; then heat the cavity ring and install it on the cavity bottom with an interference fit, and weld the connection with copper solder; then install the inner support, central support, outer support, shaft seat, blade, and multiple blade heads in sequence at the designated positions, and at the same time use the central support to install at least one metal connector at the designated position;

[0033] Step 1.2: Make a supplementary pressure card mold.

[0034] Further, step 3.1 specifically includes:

[0035] The structural ceramic particles are mixed evenly to form a primary compound. The primary compound is then loaded into the molding cavity through the pre-reserved loading port in the base of the reward chamber. The cavity is filled, vibrated and compacted, and then the reward chamber shell is installed on the base of the reward chamber using an interference fit. The connection is welded with copper solder to seal the molding cavity.

[0036] Furthermore, in step 1, the wear-resistant component of the mechanical pump is a rear guard plate or a front guard plate; the core mold is a central support, and the upper and lower ends of the central support are in contact with the cavity cover and the cavity bottom, respectively.

[0037] Step 1 specifically involves:

[0038] Step 1.1: Fabricate the molded cavity shell;

[0039] Step 1.1.1: Fabricate the chamber bottom, chamber cover, chamber ring, filling chamber shell, and center support according to the wear-resistant parts of the mechanical pump.

[0040] Make a base for the replenishment chamber, a base for the evacuation pipe interface, and a base for the molten liquid injection pipe interface on the cavity cover;

[0041] Step 1.1.2: Heat the vacuum pipe interface base and the molten liquid injection pipe interface base on the cavity cover respectively, install the vacuum pipe interface and the molten liquid injection pipe interface respectively by interference fit, and then weld the connection with copper solder.

[0042] Apply a release agent to the cavity bottom, cavity cover, cavity ring, and center support; then heat the cavity ring and install it on the cavity bottom with an interference fit, and weld the connection with copper solder; then install the center support in the set position.

[0043] Install at least one metal connector on the inner wall of the cavity cover, heat the cavity ring, install the cavity cover on the cavity ring by interference fit, and weld the connection with copper solder.

[0044] Step 1.2: Make a supplementary pressure card mold.

[0045] Further, step 3.1 specifically includes:

[0046] The brazing metal is placed into the hot melt system, and the hot melt system is connected to the molding cavity through the molten liquid injection pipe. At the same time, other materials are mixed evenly to form a preliminary compound. The preliminary compound is loaded into the molding cavity through the pre-reserved loading port in the base of the reward chamber. The cavity is filled, vibrated and compacted, and then the reward chamber shell is installed on the base of the reward chamber using an interference fit. The connection is welded with copper solder to seal the molding cavity.

[0047] Furthermore, the procedure prior to step 3.1 also includes:

[0048] Add anhydrous ethanol to the active solder and mix thoroughly, then mix thoroughly with all the structural ceramic particles.

[0049] Furthermore, in step 3.3, before adjusting the temperature of the molding cavity to the preset injection temperature of 700℃~750℃, the method further includes: adjusting the temperature of the molding cavity to the preset first-level composite temperature of 900℃ according to the preset temperature control curve, reaching above the melting point of the active solder, so that the active solder melts and reacts with the surface of the structural ceramic particles, and holding the temperature for 10 minutes.

[0050] Furthermore, step 3.7 specifically includes:

[0051] First, cool the molding cavity shell, then use local heating to remove the solder filler chamber, evacuation pipe interface, and molten metal injection pipe interface, and remove excess material from the filler chamber base, evacuation pipe interface base, and molten metal injection pipe interface base;

[0052] The connection between the cavity shell ring and the cavity shell bottom, and the cavity shell ring and the cavity shell cover is locally heated to melt the welding metal first, and then the cavity shell bottom and the cavity shell cover are cooled to cause the cavity shell bottom and the cavity shell cover to shrink and separate from the cavity shell ring. The cavity shell bottom, the cavity shell cover and the cavity shell ring are removed to obtain a semi-finished product.

[0053] Heat the semi-finished product to a temperature of 200℃~350℃, then introduce cooling airflow through cooling channels to rapidly cool the core mold, separating the core mold from the mixed material and removing the core mold; or, use a pressurized water gun to flush away the soluble material and remove the core mold.

[0054] Finally, after finishing, wear-resistant parts for the mechanical pump are obtained.

[0055] Compared with the prior art, the beneficial effects of the present invention are:

[0056] (1) This invention discloses a method for manufacturing wear-resistant parts for metal-based composite ceramic mechanical pumps, which are used to manufacture wear-resistant parts for mechanical pumps with excellent wear resistance, superior mechanical properties, and low cost. The wear-resistant parts for mechanical pumps belong to centrifugal pumps or axial flow pumps, specifically impellers (including auxiliary impellers and multi-stage impellers), rear guard plates, or front guard plates (or inlets). This invention fills the molding cavity with the initial compound material from the mixed materials, and injects the molten brazing metal into the molding cavity and the solder replenishment chamber under high temperature and vacuum, respectively performing low-pressure active composite and high-pressure diffusion composite to produce wear-resistant parts for metal-based composite ceramic mechanical pumps. This invention integrates the advantages of diffusion connection between solids under high temperature and high pressure and high-temperature and low-pressure brazing connection between solids with active metals in the prior art. The above two technologies are currently the main methods used for connecting ceramics to ceramics and ceramics to metal workpieces. Among them: 1. The most commonly used method is diffusion bonding between solids under high temperature and pressure, mainly for planar butt joints. Whether it is a direct butt joint or a butt joint with metal in between, the diffusion temperature must be lower than the melting point of the metal to avoid the inability to perform diffusion welding once the metal melts. Therefore, in order to obtain good welding strength, it is necessary to increase the diffusion welding pressure and / or extend the diffusion welding time. The disadvantage of this method is that it is limited by the melting point of the diffusion metal, the diffusion welding area, and the difference in thermal expansion of the diffusion welding workpieces. 2. High-temperature and low-pressure brazing of solids with active metals is mainly used for connections that cannot be achieved by diffusion welding, such as non-planar connections, connections that can only use lower temperatures (e.g., Kovar alloys), connections with large workpiece connection areas, and connections with large differences in thermal expansion coefficients. In this method, the brazing metals are mostly metal alloys with added active metals, as well as metals that can lower the melting point of the brazing metal and increase its flexibility. The range of metals that can be used for brazing metals is wide, and the adjustment range is large, making it suitable for the connection of various ceramics to ceramics and ceramics to metal workpieces. However, the excellent wettability of the brazing metal on the ceramic surface is obtained by the reaction between the active metal and the ceramic surface. Therefore, the brazing strength is determined by whether the brazing metal and the ceramic surface are in direct contact, the duration of contact, and the temperature. Appropriately increasing the proportion of active metal in the metal alloy and extending the contact time can improve the brazing strength. However, excessively increasing the proportion and extending the contact time will result in excessive reaction products between the metal and the ceramic. These excessive reaction products will change the properties of the metal-ceramic joint and reduce the brazing strength.

[0057] This invention combines the two methods mentioned above in the method for manufacturing wear-resistant components of mechanical pumps; it diffuses liquid brazing metal containing active metal into ceramic particles under high temperature and high pressure; wherein:

[0058] This invention utilizes a high-pressure diffusion process, transforming solid-state high-pressure diffusion into liquid-state high-pressure diffusion. This eliminates the limitation imposed by the metal's melting point, allowing for a suitable reduction in diffusion pressure by increasing the diffusion temperature, while simultaneously significantly shortening the diffusion time and improving production capacity.

[0059] The present invention uses an active metal process, which adds an active metal to the brazing metal to improve the activity of the liquid brazing metal. This not only improves the wettability of the liquid metal to ceramic particles, accelerates the diffusion rate, and reduces the diffusion pressure, but also, under the premise of relying mainly on the diffusion pressure, appropriately adjusting the amount of active metal added can effectively adjust the melting point of the brazing metal and the amount of reactants produced, thereby effectively improving the connection strength.

[0060] The present invention uses a metal-coated ceramic particle process. Since the surface area of ​​each structural ceramic particle is relatively small, the internal stress generated between the metal and the ceramic is very small. Therefore, the difference in thermal expansion can be disregarded, and a small amount or no flexible metal can be added to the brazing metal.

[0061] (2) In the method for manufacturing wear-resistant components of a metal-based composite ceramic mechanical pump according to the present invention, the solder filling chamber plays an important role. When the solder filling chamber is pressurized, the liquid brazing metal in the solder filling chamber enters the forming cavity. Energy transfer is achieved through the movement of the liquid brazing metal in the forming cavity, generating thermal isostatic pressure in the forming cavity. This thermal isostatic pressure can: 1. Increase the pressure in the forming cavity to the set diffusion composite pressure to achieve pressure-holding composite; 2. Fill all the gaps between solid materials in the forming cavity with liquid brazing metal; 3. Increase the composite strength of metal and ceramic and improve the liquid-solid diffusion composite speed of metal and ceramic, greatly improving the various properties of metal composite ceramic; 4. During the cooling process of the forming cavity... Due to the different cooling and solidification rates inside and outside, and the high filling density of the structural ceramic in this invention, the metal that solidifies first will cause the pressure in the molding cavity to fail. When the metal solidifies and shrinks later, it will lose its pressure effect and produce pinholes in the product. Therefore, during the cooling process of the molding cavity, multiple solder filling chambers are pressurized asynchronously. The area farthest from the solder filling chamber is cooled first, and the temperature drops slowly to form a temperature gradient. The liquid brazing metal in the solder filling chamber enters the molding cavity through the small holes of the isolation plug, flows through the gaps between the particles, and reaches the solidified metal. This can compensate for the volume shrinkage defects caused by the cooling and solidification of the metal and prevent the formation of bubbles and pinholes. Fifth, solidification under high pressure can improve many mechanical properties of the metal alloy in the metal composite ceramic.

[0062] (3) The present invention provides a method for manufacturing wear-resistant parts of a metal-based composite ceramic mechanical pump. Due to the use of a molded cavity shell, the manufacturing process is greatly simplified, and the quality of the product is greatly improved: First, the cavity shell ring, cavity shell bottom, and cavity shell cover of the molded cavity shell are all made of thick high-temperature resistant steel, which effectively controls deformation and greatly reduces the amount of error and improves uniformity; Second, since the molded cavity shell used in the present invention can be reused, high-quality high-temperature resistant steel can be used to manufacture the molded cavity shell, thereby effectively improving the high temperature range of the manufactured parts and increasing the range of materials to be selected; Third, since the present invention adds a solder filling chamber, a molten liquid injection pipe interface base, and a vacuum pipe interface base to the molded cavity shell by interference fit and welding, and uses electromagnetic induction local heating process to disassemble the molten liquid injection pipe interface base and the vacuum pipe interface base, the manufacturing process is greatly simplified; Fourth, the cavity shell ring, cavity shell bottom, and cavity shell cover of the molded cavity shell are installed and disassembled by electromagnetic induction local heating interference fit, and a small amount of solder is used for brazing and sealing simultaneously. Therefore, the molded cavity shell produced has high pressure resistance; at the same time, it simplifies the process, speeds up the production line, improves product precision, and reduces solder consumption; Fifth, the most important point of this invention is the design of the mandrel. The most complex parts of the mechanical pump are the impeller and the volute, especially the impeller, which is composed of a front blade, a rear blade, and blades sandwiched between them. The arc-shaped hole formed between the blades is the biggest difficulty in making the impeller using this invention. The difficulty lies in the high requirements for the mandrel. The main requirements for the mandrel are: high temperature resistance, high pressure resistance, no sand holes, no liquid immersion (micro-liquid immersion), and easy removal; This invention selects four types of mandrel structures: when the distance between the front and rear blades of the impeller is large, the mandrel is made of metal; when the distance between the front and rear blades of the impeller is small, the mandrel is made of a solvent-soluble material. The mandrel can also be composed of internal metal and external solvent-soluble material, or external metal and internal solvent-soluble material.

[0063] (4) In the method of manufacturing wear-resistant parts of metal-based composite ceramic mechanical pumps according to the present invention, active solder and structural ceramic particles are reacted at high temperature first. After the reaction is completed, the temperature is lowered so that the active solder that has not participated in the reaction solidifies. This avoids the active solder that has not solidified flowing with the liquid brazing metal when it is injected. It has the advantages of low cost, wide range of material selection and adjustment, and good bonding between ceramic and metal.

[0064] (5) The present invention provides a method for manufacturing wear-resistant parts for metal-based composite ceramic mechanical pumps. Based on the performance requirements of various materials and parts used in manufacturing wear-resistant parts for mechanical pumps, the process curves of low-pressure active composite and high-pressure diffusion composite manufacturing pressure, time and temperature can be reasonably adjusted to optimize and improve the manufacturing of wear-resistant parts for mechanical pumps with excellent performance.

[0065] (6) The present invention provides a method for manufacturing wear-resistant parts for metal-based composite ceramic mechanical pumps, which integrates the above-mentioned low-pressure active composite and high-pressure diffusion composite schemes. In addition to the beneficial effects mentioned in (1), it also greatly expands the selection range of active solder and brazing metal, avoiding the limitation of a certain metal and thus reducing the performance of wear-resistant parts for mechanical pumps. Although there are many high-performance metal alloys, when used in combination with active solder, the advantages of metal alloys cannot be fully utilized. In this case, reducing the amount of active solder and extending the high-pressure diffusion time can produce wear-resistant parts for mechanical pumps that fully utilize the advantages of metal alloys. The present invention not only allows for the widespread use of various existing multi-element alloys, but also enables the development of wear-resistant parts for mechanical pumps made of new alloy materials by the continuous increase of new alloys.

[0066] (7) The present invention provides a method for manufacturing wear-resistant parts for metal-based composite ceramic mechanical pumps, which enables the initial compound material particles filled into the molding cavity to be relatively stable, and the particles will not undergo relative displacement. Therefore, by adjusting the size of the ceramic particles, wear-resistant parts for mechanical pumps with high ceramic particle volume ratio and excellent wear resistance can be manufactured. The metal particles added in the present invention can effectively adjust the average thermal expansion coefficient of the initial compound material, and the metal particles can also adjust the impact resistance of the wear-resistant parts for mechanical pumps. The brazing metal in the present invention forms a three-dimensional network structure in the wear-resistant parts for mechanical pumps, so the mechanical properties of the brazing metal are the main mechanical properties of the wear-resistant parts for mechanical pumps. The manufacturing method of the present invention has a wide range of brazing metals to choose from, so it can manufacture a variety of high-quality wear-resistant parts for mechanical pumps.

[0067] (8) In the method for manufacturing wear-resistant parts of a metal-based composite ceramic mechanical pump according to the present invention, the vacuum environment provided by the molding cavity shell avoids the reaction of structural ceramic particles, metal particles, and active solder with gas at high temperature, thereby avoiding the reduction of the composite connection strength of the active reaction material and auxiliary brazing material on the surface of ceramic particles due to reaction products, ensuring that the active reaction material and auxiliary brazing material can penetrate, diffuse and react on the surface of structural ceramic particles, so that the brazing metal can wet the surface of structural ceramic particles, and at the same time eliminates the possibility of blistering, cracking, peeling and falling off of the brazing metal on the surface of structural ceramic particles, avoiding the decrease of the connection strength of the brazing metal on the surface of the particle material; thereby enabling the brazing metal to be tightly connected with the surface of structural ceramic particles, and obtaining a wear-resistant part of mechanical pump with excellent performance.

[0068] (9) In the method for manufacturing wear-resistant parts of a metal-based composite ceramic mechanical pump according to the present invention, the materials used can be recycled and reused, saving material costs, reducing energy consumption and environmental pollution. Attached Figure Description

[0069] Figure 1This is a schematic diagram illustrating the principle of step 3.7 in an embodiment of the method for manufacturing wear-resistant parts of a metal-based composite ceramic mechanical pump according to the present invention.

[0070] Figure 2 for Figure 1 A top-down, layered sectional view;

[0071] Figure 3 This is a schematic diagram of the core mold structure in step 1.1 of Embodiment 1 of the present invention;

[0072] Figure 4 This is a schematic diagram of the interference fit between the reward compartment shell and the reward compartment base in step 1.1 of Embodiment 1 of the present invention;

[0073] Figure 5 This is a schematic diagram of the interference fit between the air extraction pipe interface and the air extraction pipe interface base in step 1.1 of Embodiment 1 of the present invention;

[0074] Figure 6 This is a schematic diagram of the interference fit between the molten liquid injection pipe interface and the molten liquid injection pipe interface base in step 1.1 of Embodiment 1 of the present invention;

[0075] Figure 7 This is a schematic diagram of the blade plate being mounted in the external support in step 1.2 of embodiment one of the present invention;

[0076] Figure 8 This is a schematic diagram illustrating the principle of step 3.6 in Embodiment 4 of the present invention;

[0077] Figure 9 for Figure 8 A top-view, layered sectional view;

[0078] Figure 10 This is a schematic diagram illustrating the principle of step 3.6 in Embodiment 5 of the present invention;

[0079] Figure 11 for Figure 10 A top-down, layered sectional view.

[0080] The annotations in the attached figures are explained as follows:

[0081] 11-Cavity shell ring; 12-Cavity shell bottom; 13-Cavity shell cover; 14-Isolation plug; 15-Replenishment chamber base; 16-Replenishment chamber shell; 17-Ejection pipe interface base; 18-Melting pipe interface base; 19-Filter element; 20-Isolation device; 21-Lower clamping plate; 22-Upper clamping plate; 23-Pressure column; 31-Mixed material; 32-Metal connector; 33-Solder replenishment chamber; 34-Ejection pipe; 35-Melting pipe; 61-Outer support; 611-Upper part; 612-Lower part; 62-Impeller; 63-Impeller head; 64-Inner support; 65-Center support; 66-Shaft seat. Detailed Implementation

[0082] The present invention will be further described below with reference to the accompanying drawings and exemplary embodiments.

[0083] This invention discloses a method for manufacturing wear-resistant components for metal-based composite ceramic mechanical pumps. The wear-resistant components belong to centrifugal pumps or axial flow pumps, specifically including impellers (including auxiliary impellers and multi-stage impellers), rear guard plates, or front guard plates (which can also be slurry inlets).

[0084] The following are specific embodiments;

[0085] Example 1

[0086] Reference Figures 1 to 7 A method for manufacturing wear-resistant components for a metal-based composite ceramic mechanical pump includes the following steps:

[0087] The wear-resistant component of the mechanical pump is an impeller with a diameter of 500 mm and a thickness of 130 mm. The distance between the front and rear blades of the impeller is 80 mm, and the thickness of both the front and rear blades is 25 mm.

[0088] Step 1: Fabricate the molding cavity shell and supplementary pressure clamping mold according to the wear-resistant parts of the mechanical pump;

[0089] The molding cavity shell includes a cavity shell bottom 12, a cavity shell cover 13, a cavity shell ring 11, and a core mold. The cavity shell bottom 12, the cavity shell cover 13, and the cavity shell ring 11 constitute an outer shell. The core mold is disposed inside the outer shell, and a molding cavity is formed between the core mold and the inner wall of the outer shell. The cavity shell cover 13 is provided with a vacuum pipe interface base 17, a melt injection pipe interface base 18, and at least one filler tank base 15. The filler tank base 15 is provided with a filler tank shell 16 communicating with the molding cavity. The filler tank shell 16 contains a solder filler tank 33. The solder filler tank 33 and the molding cavity are separated by an isolation plug 14 with small holes.

[0090] The core mold includes an inner support 64, a central support 65, an outer support 61, multiple blades 62, and multiple blade extension heads 63. The inner support 64 and the bearing seat 66 are respectively located at the center of the cavity bottom 12 and the cavity cover 13. The central support 65 is located on the top surface of the inner support 64. The top surface, bottom surface, and outer side wall of the outer support 61 are in contact with the cavity cover 13, the cavity bottom 12, and the cavity ring 11, respectively. The inner end of each blade 62 is connected to the central support 65 through the blade extension head 63, and the outer end is connected to the inner side wall of the outer support 61. The inner support 64, the central support 65, the outer support 61, the multiple blades 62, and the multiple blade extension heads 63 are all made of metal, and multiple cooling channels are provided on the metal. Specifically, the blades 62 and the multiple blade extension heads 63 are made of 316 stainless steel.

[0091] When the wear-resistant part of the mechanical pump is the impeller, and the distance between the front and rear blades of the impeller is large, the core mold is made independently of a metal material with a high coefficient of thermal expansion, and the demolding is carried out by temperature difference. If the distance between the front and rear blades of the impeller is small, the core mold can also be made independently of a solvent-resistant material.

[0092] The solder replenishment pressurization mold includes an upper plate 22, at least one pressurizing column 23, and a lower plate 21. A pressurization cavity is formed between the upper plate 22, all pressurizing columns 23, and the lower plate 21. The pressurization cavity is used to house the forming cavity shell. Temperature control devices are provided in the upper plate 22 and the lower plate 21. The pressurizing column 23 is used to pressurize the solder replenishment chamber 33.

[0093] Step 1.1: Fabricate the molded cavity shell;

[0094] Step 1.1.1: Fabricate the following components according to the design: cavity bottom 12, cavity cover 13, cavity ring 11, replenishment compartment shell 16, inner support 64, central support 65, shaft seat 66, outer support 61, blade 62, and multiple blade heads 63. Specifically, the outer support 61 is divided into an upper part 611 and a lower part 612. The outer end of each blade 62 is engaged with the inner wall of the outer support 61. Figure 7 As shown;

[0095] A replenishment chamber base 15, an extraction pipe interface base 17, and a molten liquid injection pipe interface base 18 are fabricated on the cavity cover 13. Isolation plugs 14, filter elements 19, and isolation devices 20 are respectively installed inside the replenishment chamber base 15, the extraction pipe interface base 17, and the molten liquid injection pipe interface base 18. Figure 4 , Figure 5 , Figure 6 As shown;

[0096] Step 1.1.2: Heat the replenishment chamber base 15, the evacuation pipe interface base 17, and the molten liquid injection pipe interface base 18 on the cavity cover 13 by electromagnetic induction heating. Install the replenishment chamber shell 16, the solder replenishment chamber 33, the evacuation pipe 34 interface, and the molten liquid injection pipe 35 interface by interference fit. Then weld the connection with copper solder.

[0097] A release agent, namely boron nitride, is sprayed onto the cavity bottom 12, cavity cover 13, cavity ring 11, inner support 64, central support 65, outer support 61, shaft seat 66, blade 62, and multiple blade extension heads 63. The cavity ring 11 is then heated and installed on the cavity bottom 12 with an interference fit, and then welded with copper solder. The inner support 64, central support 65, outer support 61, shaft seat 66, blade 62, and multiple blade extension heads 63 are then installed in the designated positions in sequence, and the metal connector 32 is installed in the designated position using the central support 65.

[0098] Step 1.2: Make a supplementary pressure card mold;

[0099] Step 2: Prepare the mixed ingredients 31;

[0100] The mixed material 31 is selected from structural ceramic particles, metal particles, active solder, and brazing metal, with a volume ratio of 4-4.5:1.3-2:0.8-1.2:3-3.2.

[0101] The structural ceramic particles selected are: 50% by volume alumina structural ceramic particles with a particle size of 0.8-0.5 mm, 30% by volume alumina structural ceramic particles with a particle size of 0.3-0.5 mm, 15% by volume silicon carbide structural ceramic particles with a particle size of 0.3-0.2 mm, 8% by volume quartz structural ceramic particles with a particle size of 0.1-0.3 mm, and 5% by volume alumina structural ceramic particles with a particle size of 0.1-0.08 mm.

[0102] The metal particles are selected from 90% by volume of 0.3-0.5mm Q235 steel particles and 10% by volume of Q235 steel wire with a diameter of 0.3mm and a length of 3mm.

[0103] The active reaction materials in the active solder are titanium powder and titanium hydride powder in a volume ratio of 60%:40%, and the auxiliary brazing materials are copper alloy powder and boron oxide in a mass ratio of 97%:3%.

[0104] The brazing metal is made of 5-series aluminum alloy;

[0105] Step 3: Fabricate wear-resistant parts for the mechanical pump;

[0106] Step 3.1: Surface treatment of structural ceramic particles;

[0107] Anhydrous ethanol is added to hydrogenated titanium powder and mixed evenly. Then, it is mixed evenly with all structural ceramic particles. At the same time, titanium powder and copper alloy powder are mixed evenly. Finally, all structural ceramic particles and the mixture of titanium powder and copper alloy powder are mixed evenly to obtain the preform.

[0108] Step 3.2: Load the mixed material 31;

[0109] The pre-mixed material from step 3.1 is mixed evenly with metal particles to form a primary compound mixture. The primary compound mixture is then loaded into the molding cavity, filled, and compacted by vibration. The cavity shell ring 11 is then heated by electromagnetic induction heating. The cavity shell cover 13 is installed on the cavity shell ring 11 by interference fit, and the outer side of the cavity shell cover 13 is welded to the cavity shell ring 11 with copper solder to seal the molding cavity.

[0110] Simultaneously, the brazing metal is placed into the hot melt system, and the hot melt system is connected to the forming cavity through the melt injection pipe 35;

[0111] Step 3.3: Vacuuming;

[0112] The molding cavity is heated to remove anhydrous ethanol vapor. When the temperature reaches the preset vacuum temperature of 250℃~300℃, the gas in the molding cavity is extracted through the vacuum pipe 34, so that the vacuum degree in the molding cavity is higher than 3~30KPa.

[0113] Step 3.4: Inject liquid brazing metal to complete the fabrication of mixed material 31;

[0114] According to the preset temperature control curve, the temperature of the forming cavity is adjusted to the preset first-level composite temperature of 900℃, which is above the melting point of the active solder, so that the copper-titanium alloy melts and reacts with the surface of the structural ceramic particles, and copper is coated on the surface of the metal particles. The first-level vacuum active composite is completed after holding the temperature for 10 minutes. The purpose is to achieve metallization of the surface of the structural ceramic particles.

[0115] Then, the temperature of the molding cavity is adjusted to the preset injection temperature of 700℃~750℃, and the brazing metal in the hot melt system is simultaneously adjusted to 750℃~800℃. The brazing metal is pressurized and injected into and fills the molding cavity and the solder replenishment chamber 33, completing the uniform thermal mixing of the mixed material 31, and sealing the air extraction pipe interface base 17 and the melt injection pipe interface base 18.

[0116] Step 3.5: Adjust the temperature of the molding cavity to the preset composite temperature of 700℃~750℃ according to the preset temperature control curve, apply pressure of 0.22MPa, and keep warm for 10 minutes to complete the second-stage low-pressure active composite of metal and ceramic.

[0117] Step 3.6: Install the supplementary pressure mold

[0118] After adjusting the temperature of the molding cavity to the pressurization temperature according to the preset temperature control curve, the molding cavity shell is placed into the pressurization cavity;

[0119] Step 3.7: Perform internal heating isostatic pressing;

[0120] The solder filling chamber 33 is slowly pressurized by the pressure column 23, causing the liquid brazing metal in the solder filling chamber 33 to flow into the forming cavity under pressure and the pressure is evenly transmitted in the forming cavity, generating thermal isostatic pressure in the forming cavity; the pressure is slowly controlled to make the thermal isostatic pressure in the forming cavity higher than 20MPa; under this pressure, high-pressure diffusion composite is carried out in the forming cavity, and diffusion composite is completed by holding at 700℃~720℃ for 2 minutes;

[0121] Then, asynchronous pressurization is continued on the solder replenishment chamber 33 on the forming cavity, while cooling is carried out according to the set cooling curve. During cooling, the pressure inside the forming cavity remains constant, so that the forming cavity cools slowly from the part away from the solder replenishment chamber 33 first, so that the liquid brazing metal inside the forming cavity gradually solidifies. During the process, it is necessary to ensure that the brazing metal to be injected into the forming cavity in the solder replenishment chamber 33 is always in a liquid state. When the temperature of the forming cavity drops below the melting point of the brazing metal, the pressure is removed, the replenishment pressurization mold is opened, and the forming cavity shell is taken out.

[0122] Step 3.8: Remove the molding cavity shell.

[0123] First, the molding cavity shell is cooled. Then, the solder filler chamber 33, the evacuation pipe 34 interface, and the molten liquid injection pipe 35 interface are removed by electromagnetic induction heating. Excess material in the filler chamber base 15, the evacuation pipe interface base 17, and the molten liquid injection pipe interface base 18 is also removed.

[0124] The connection between the cavity shell ring 11 and the cavity shell bottom 12, and between the cavity shell ring 11 and the cavity shell cover 13, is heated by electromagnetic induction heating. The welding metal is melted first, and then the cavity shell bottom 12 and the cavity shell cover 13 are cooled. The cavity shell bottom 12 and the cavity shell cover 13 shrink and separate from the cavity shell ring 11. The cavity shell bottom 12, the cavity shell cover 13 and the cavity shell ring 11 are removed to obtain a semi-finished product.

[0125] The semi-finished product is heated to a temperature of over 200°C. Cooling airflow is then introduced through the cooling channels on the core mold to rapidly cool the core mold, separating it from the mixed material 31 and removing the core mold. Finally, the product is trimmed to obtain the wear-resistant parts for the mechanical pump.

[0126] Example 2

[0127] Reference Figures 1 to 7 A method for manufacturing wear-resistant components for a metal-based composite ceramic mechanical pump includes the following steps:

[0128] The wear-resistant component of the mechanical pump is an impeller, which has a diameter of 400 mm, a thickness of 120 mm, a distance of 65 mm between the front and rear blades, and a thickness of 27.5 mm between the front and rear blades.

[0129] Step 1: Fabricate the molding cavity shell and supplementary pressure clamping mold according to the wear-resistant parts of the mechanical pump;

[0130] The inner support 64, central support 65, outer support 61, multiple blades 62, and multiple blade heads 63 are all made of metal, and multiple cooling channels are provided on the metal. Specifically, the blades 62 and multiple blade heads 63 are made of 316 stainless steel and are covered with a 3mm thick solvent-absorbing material, which is a solvent-absorbing material mixed with phenolic resin and sodium chloride. In other embodiments, the core mold may also be composed of an outer metal and an inner solvent-absorbing material.

[0131] The remaining settings in step 1 are the same as in Example 1;

[0132] Step 2: Prepare the mixed ingredients 31;

[0133] The mixed material 31 is selected from structural ceramic particles, metal particles, and brazing metal, with a volume ratio of 4-4.5:2.5-3:3-3.5.

[0134] The structural ceramic particles selected are alumina structural ceramic particles with a particle size of 1-0.8 mm (90% by volume) and quartz structural ceramic particles with a particle size of 0.8-0.5 mm (10% by volume).

[0135] The metal particles are made of 0.8-0.5mm Q235 steel.

[0136] The brazing metal is a titanium-copper alloy;

[0137] Step 3: Fabricate wear-resistant parts for the mechanical pump;

[0138] Step 3.1: Load the mixed material 31;

[0139] Structural ceramic particles and metal particles are mixed evenly to form a primary compound. The primary compound is then loaded into the molding cavity, filled, vibrated and compacted, and the cavity shell ring 11 is heated. The cavity shell cover 13 is installed on the cavity shell ring 11 through an interference fit, and the outer side of the cavity shell cover 13 is welded to the cavity shell ring 11 with copper solder to seal the molding cavity.

[0140] Simultaneously, the brazing metal is placed into the hot melt system, and the hot melt system is connected to the forming cavity through the melt injection pipe 35;

[0141] Step 3.2: Vacuuming;

[0142] The molding cavity is heated to remove anhydrous ethanol vapor. When the temperature reaches the preset vacuum temperature of 350℃~450℃, the gas in the molding cavity is extracted through the vacuum pipe 34, so that the vacuum degree in the molding cavity is higher than 3~30KPa.

[0143] Step 3.3: Inject liquid brazing metal to complete the fabrication of the mixed material 31;

[0144] Then, the temperature of the molding cavity is adjusted to the preset injection temperature of 700℃~750℃, and the brazing metal in the hot melt system is simultaneously adjusted to 900℃~920℃. The brazing metal is injected under pressure and fills the molding cavity and the solder replenishment chamber 33, thus completing the uniform thermal mixing of the mixed material 31. The vacuum pipe interface base 17 and the melt injection pipe interface base 18 are then sealed.

[0145] Step 3.4: Adjust the temperature of the molding cavity to the preset composite temperature of 700℃~750℃ according to the preset temperature control curve, apply pressure of 0.25MPa, and keep warm for 10 minutes to complete the second-stage low-pressure active composite of metal and ceramic.

[0146] Step 3.5: Install the supplementary pressure mold;

[0147] After adjusting the temperature of the molding cavity to the pressurization temperature according to the preset temperature control curve, the molding cavity shell is placed into the pressurization cavity;

[0148] Step 3.6: Perform internal heating isostatic pressing;

[0149] The solder filling chamber 33 is slowly pressurized by the pressure column 23, so that the liquid brazing metal in the solder filling chamber 33 flows into the forming cavity under pressure and the pressure is evenly transmitted in the forming cavity, generating thermal isostatic pressure in the forming cavity; the pressure is slowly controlled to make the thermal isostatic pressure in the forming cavity higher than 15MPa; under this pressure, high-pressure diffusion composite is carried out in the forming cavity, and diffusion composite is completed by holding at 900℃~880℃ for 2 minutes;

[0150] Then, asynchronous pressurization is continued on the solder replenishment chamber 33 on the forming cavity, while cooling is carried out according to the set cooling curve. During cooling, the pressure inside the forming cavity remains constant, so that the forming cavity cools slowly from the part away from the solder replenishment chamber 33 first, so that the liquid brazing metal inside the forming cavity gradually solidifies. During the process, it is necessary to ensure that the brazing metal to be injected into the forming cavity in the solder replenishment chamber 33 is always in a liquid state. When the temperature of the forming cavity drops below the melting point of the brazing metal, the pressure is removed, the replenishment pressurization mold is opened, and the forming cavity shell is taken out.

[0151] Step 3.7: Remove the molding cavity shell and core mold;

[0152] First, cool the molding cavity shell, then use local heating to remove the solder filler 33, the evacuation pipe 34 interface, and the molten liquid injection pipe 35 interface, and remove the excess material in the filler 15, the evacuation pipe interface base 17, and the molten liquid injection pipe interface base 18.

[0153] The connection between the cavity shell ring 11 and the cavity shell bottom 12, and the cavity shell ring 11 and the cavity shell cover 13 is locally heated to melt the welding metal first, and then the cavity shell bottom 12 and the cavity shell cover 13 are cooled to cause the cavity shell bottom 12 and the cavity shell cover 13 to shrink and separate from the cavity shell ring 11. The cavity shell bottom 12, the cavity shell cover 13 and the cavity shell ring 11 are removed to obtain a semi-finished product.

[0154] Use a pressurized water gun to flush away the soluble material on the core mold, then remove the core mold; finally, perform finishing to obtain the wear-resistant parts of the mechanical pump.

[0155] Example 3

[0156] Reference Figures 1 to 7 A method for manufacturing wear-resistant components for a metal-based composite ceramic mechanical pump includes the following steps:

[0157] The wear-resistant component of the mechanical pump is an impeller with a diameter of 700 mm and a thickness of 200 mm. The distance between the front and rear blades of the impeller is 140 mm, and the thickness of the front and rear blades is 30 mm.

[0158] Step 1: Fabricate the molding cavity shell and supplementary pressure clamping mold according to the wear-resistant parts of the mechanical pump;

[0159] Blade 62 and multiple blades plus head 63 are specifically made of 304 stainless steel;

[0160] The remaining settings in step 1 are the same as in Example 1;

[0161] Step 2: Prepare the mixed ingredients 31;

[0162] The mixed material 31 is selected from structural ceramic particles, active solder, and brazing metal, with a volume ratio of 5-5.2:0.3-0.5:4.3-4.5.

[0163] The structural ceramic particles selected are alumina structural ceramic particles with a particle size of 0.8–0.5 mm;

[0164] In the active solder, the active reaction material is copper-silver-titanium alloy solder, which accounts for 98% of the weight of the active solder, and the auxiliary brazing material is boron powder, which accounts for 2% of the weight of the active solder.

[0165] Aluminum alloy is used as the brazing metal;

[0166] Step 3: Fabricate wear-resistant parts for the mechanical pump;

[0167] Step 3.1: Surface treatment of structural ceramic particles;

[0168] Anhydrous ethanol is added to the active solder and mixed evenly, and then mixed evenly with all the structural ceramic particles to obtain the preform.

[0169] Step 3.2: Load the mixed material 31;

[0170] The pre-mixed material from step 3.1 is loaded into the molding cavity as the initial compound material, filled and compacted by vibration, and then the cavity shell ring 11 is heated. The cavity shell cover 13 is installed on the cavity shell ring 11 by interference fit, and the outer side of the cavity shell cover 13 is welded to the cavity shell ring 11 with copper solder to seal the molding cavity.

[0171] Simultaneously, the brazing metal is placed into the hot melt system, and the hot melt system is connected to the forming cavity through the melt injection pipe 35;

[0172] Step 3.3, Vacuuming

[0173] The molding cavity is heated to remove anhydrous ethanol vapor. When the temperature reaches the preset vacuum temperature of 250℃~300℃, the gas in the molding cavity is extracted through the vacuum pipe 34, so that the vacuum degree in the molding cavity is higher than 3~30KPa.

[0174] Step 3.4: Inject liquid brazing metal to complete the fabrication of mixed material 31;

[0175] According to the preset temperature control curve, the temperature of the molding cavity is adjusted to the preset first-level composite temperature of 900℃, which is above the melting point of the active solder, so that the active solder melts and reacts with the surface of the structural ceramic particles, as well as coats the surface of the metal particles. The first-level vacuum active composite is completed after 10 minutes of heat preservation.

[0176] Then, the temperature of the molding cavity is adjusted to the preset injection temperature of 700℃~750℃, and the brazing metal in the hot melt system is simultaneously adjusted to 750℃~800℃. The brazing metal is pressurized and injected into and fills the molding cavity and the solder replenishment chamber 33, completing the uniform thermal mixing of the mixed material 31, and sealing the air extraction pipe interface base 17 and the melt injection pipe interface base 18.

[0177] Step 3.5: Adjust the temperature of the molding cavity to the preset composite temperature of 700℃~750℃ according to the preset temperature control curve, apply pressure of 0.3MPa, and keep warm for 10 minutes to complete the second-stage low-pressure active composite of metal and ceramic.

[0178] Step 3.6: Install the supplementary pressure mold

[0179] After adjusting the temperature of the molding cavity to the pressurization temperature according to the preset temperature control curve, the molding cavity shell is placed into the pressurization cavity;

[0180] Step 3.7: Perform internal heating isostatic pressing;

[0181] The solder filling chamber 33 is slowly pressurized by the pressure column 23, causing the liquid brazing metal in the solder filling chamber 33 to flow into the forming cavity under pressure and the pressure is evenly transmitted in the forming cavity, generating thermal isostatic pressure in the forming cavity; the pressure is slowly controlled to make the thermal isostatic pressure in the forming cavity higher than 20MPa; under this pressure, high-pressure diffusion composite is carried out in the forming cavity, and diffusion composite is completed by holding at 700℃~720℃ for 1.5 minutes;

[0182] Then, asynchronous pressurization is continued on the solder replenishment chamber 33 on the forming cavity, while cooling is carried out according to the set cooling curve. During cooling, the pressure inside the forming cavity remains constant, so that the forming cavity cools slowly from the part away from the solder replenishment chamber 33 first, so that the liquid brazing metal inside the forming cavity gradually solidifies. During the process, it is necessary to ensure that the brazing metal to be injected into the forming cavity in the solder replenishment chamber 33 is always in a liquid state. When the temperature of the forming cavity drops below the melting point of the brazing metal, the pressure is removed, the replenishment pressurization mold is opened, and the forming cavity shell is taken out.

[0183] Step 3.8: Remove the molding cavity shell.

[0184] First, cool the molding cavity shell, then use local heating to remove the solder filler 33, the evacuation pipe 34 interface, and the molten liquid injection pipe 35 interface, and remove the excess material in the filler 15, the evacuation pipe interface base 17, and the molten liquid injection pipe interface base 18.

[0185] The connection between the cavity shell ring 11 and the cavity shell bottom 12, and the cavity shell ring 11 and the cavity shell cover 13 is locally heated to melt the welding metal first, and then the cavity shell bottom 12 and the cavity shell cover 13 are cooled to cause the cavity shell bottom 12 and the cavity shell cover 13 to shrink and separate from the cavity shell ring 11. The cavity shell bottom 12, the cavity shell cover 13 and the cavity shell ring 11 are removed to obtain a semi-finished product.

[0186] The semi-finished product is heated to 300°C, and then cooling airflow is introduced through the cooling channels on the core mold to cool the core mold quickly. The core mold is then separated from the mixed material 31 and removed. Finally, it is trimmed to obtain the wear-resistant part of the mechanical pump.

[0187] Example 4

[0188] Reference Figure 8 , Figure 9 , Figures 4 to 6 A method for manufacturing wear-resistant components for a metal-based composite ceramic mechanical pump includes the following steps:

[0189] The wear-resistant component of the mechanical pump is a rear guard plate 31 with a diameter of 1000 mm and a thickness of 45 mm; in other embodiments, the rear guard plate can be replaced with a front guard plate.

[0190] Step 1: Fabricate the molding cavity shell and supplementary pressure clamping mold according to the wear-resistant parts of the mechanical pump;

[0191] Step 1.1: Fabricate the molded cavity shell;

[0192] The molding cavity shell includes a cavity shell bottom 12, a cavity shell cover 13, a cavity shell ring 11, and a core mold. The cavity shell bottom 12, the cavity shell cover 13, and the cavity shell ring 11 constitute an outer shell. The core mold is disposed inside the outer shell, and a molding cavity is formed between the core mold and the inner wall of the outer shell. The cavity shell cover 13 is provided with a vacuum pipe interface base 17, a melt injection pipe interface base 18, and at least one filler tank base 15. The filler tank base 15 is provided with a filler tank shell 16 communicating with the molding cavity. The filler tank shell 16 contains a solder filler tank 33. The solder filler tank 33 and the molding cavity are separated by an isolation plug 14 with small holes.

[0193] The core mold is a central support 65. The upper and lower ends of the central support 65 are in contact with the cavity cover 13 and the cavity bottom 12, respectively. The central support 65 is made of metal, and multiple cooling channels are provided on the metal. The central support 65 is specifically made of 316 stainless steel.

[0194] Step 1.1.1: According to the design, manufacture the cavity bottom 12, cavity cover 13, cavity ring 11, replenishment compartment shell 16, and central support 65 respectively;

[0195] A replenishment chamber base 15, an extraction pipe interface base 17, and a molten liquid injection pipe interface base 18 are fabricated on the cavity cover 13. Isolation plugs 14, filter elements 19, and isolation devices 20 are respectively installed inside the replenishment chamber base 15, the extraction pipe interface base 17, and the molten liquid injection pipe interface base 18. Figure 4 , Figure 5 , Figure 6 As shown;

[0196] Step 1.1.2: Heat the vacuum pipe interface base 17 and the molten liquid injection pipe interface base 18 on the cavity cover 13 respectively, install the vacuum pipe 34 interface and the molten liquid injection pipe 35 interface respectively by interference fit, and then weld the connection with copper solder.

[0197] A release agent, namely boron nitride release agent, is sprayed onto the cavity bottom 12, cavity cover 13, cavity ring 11, and center support 65. The cavity ring 11 is then heated and installed on the cavity bottom 12 with an interference fit, and the connection is welded with copper solder. The center support 65 is then installed in the set position.

[0198] Multiple metal connectors 32 are installed on the inner wall of the cavity cover 13, the cavity ring 11 is heated, the cavity cover 13 is installed on the cavity ring 11 by interference fit, and the connection is welded with copper solder.

[0199] Step 1.2: Make a supplementary pressure card mold;

[0200] Step 2: Prepare the mixed ingredients 31;

[0201] The mixed material 31 is selected from structural ceramic particles and brazing metal, with a volume ratio of 6.5-6.8:3.2-3.5.

[0202] The structural ceramic particles selected are alumina structural ceramic particles with an average particle size of 4.5 mm at a volume ratio of 40%, and alumina structural ceramic particles with a particle size of 0.5 to 0.3 mm at a volume ratio of 60%.

[0203] The brazing metal is made of 7-series aluminum alloy;

[0204] Step 3: Fabricate wear-resistant parts for the mechanical pump;

[0205] Step 3.1: Load the mixed material 31;

[0206] The structural ceramic particles are mixed evenly to form a primary compound. The primary compound is then loaded into the molding cavity through the pre-reserved loading port in the base 15 of the reward chamber. The cavity is filled, vibrated and compacted. The shell 16 of the reward chamber is then installed on the base 15 of the reward chamber using an interference fit. The connection is welded with copper solder to seal the molding cavity.

[0207] Simultaneously, the brazing metal is placed into the hot melt system, and the hot melt system is connected to the forming cavity through the melt injection pipe 35;

[0208] Step 3.2: Vacuuming;

[0209] The molding cavity is heated to remove steam. When the temperature reaches the preset vacuum temperature of 350℃~450℃, the gas in the molding cavity is extracted through the vacuum pipe 34, so that the vacuum degree in the molding cavity is higher than 3~30KPa.

[0210] Step 3.3: Inject liquid brazing metal to complete the fabrication of the mixed material 31;

[0211] Then, the temperature of the molding cavity is adjusted to the preset injection temperature of 700℃~750℃, and the brazing metal in the hot melt system is simultaneously adjusted to 800℃~820℃. The brazing metal is injected under pressure and fills the molding cavity and the solder replenishment chamber 33, thus completing the uniform thermal mixing of the mixed material 31. The vacuum pipe interface base 17 and the melt injection pipe interface base 18 are then sealed.

[0212] Step 3.4: Adjust the temperature of the molding cavity to the preset composite temperature of 700℃~750℃ according to the preset temperature control curve, apply pressure of 0.2MPa, and keep warm for 10 minutes to complete the second-stage low-pressure active composite of metal and ceramic.

[0213] Step 3.5: Install the supplementary pressure mold

[0214] After adjusting the temperature of the molding cavity to the pressurization temperature according to the preset temperature control curve, the molding cavity shell is placed into the pressurization cavity;

[0215] Step 3.6: Perform internal heating isostatic pressing;

[0216] The solder filling chamber 33 is slowly pressurized by the pressure column 23, so that the liquid brazing metal in the solder filling chamber 33 flows into the forming cavity under pressure and the pressure is evenly transmitted in the forming cavity, generating thermal isostatic pressure in the forming cavity; the pressure is slowly controlled to make the thermal isostatic pressure in the forming cavity higher than 18MPa; under this pressure, high-pressure diffusion composite is carried out in the forming cavity, and diffusion composite is completed by holding at 700℃~720℃ for 2 minutes;

[0217] Then, asynchronous pressurization is continued on the solder replenishment chamber 33 on the forming cavity, while cooling is carried out according to the set cooling curve. During cooling, the pressure inside the forming cavity remains constant, so that the forming cavity cools slowly from the part away from the solder replenishment chamber 33 first, so that the liquid brazing metal inside the forming cavity gradually solidifies. During the process, it is necessary to ensure that the brazing metal to be injected into the forming cavity in the solder replenishment chamber 33 is always in a liquid state. When the temperature of the forming cavity drops below the melting point of the brazing metal, the pressure is removed, the replenishment pressurization mold is opened, and the forming cavity shell is taken out.

[0218] Step 3.8: Remove the molding cavity shell and core mold;

[0219] First, the molding cavity shell is cooled. Then, the solder filler chamber 33, the evacuation pipe 34 interface, and the molten liquid injection pipe 35 interface are removed by electromagnetic induction heating. Excess material in the filler chamber base 15, the evacuation pipe interface base 17, and the molten liquid injection pipe interface base 18 is also removed.

[0220] By heating the connection between the cavity shell ring 11 and the cavity shell bottom 12, and between the cavity shell ring 11 and the cavity shell cover 13 using electromagnetic induction, the welding metal is first melted, and then the cavity shell bottom 12 and the cavity shell cover 13 are cooled, causing the cavity shell bottom 12 and the cavity shell cover 13 to shrink and separate from the cavity shell ring 11. The cavity shell bottom 12, the cavity shell cover 13 and the cavity shell ring 11 are then removed to obtain a semi-finished product.

[0221] The semi-finished product is heated to 350°C, and then cooling airflow is introduced through the cooling channels on the center support 65 to cool the center support 65. After the center support 65 is removed, it is repaired to obtain the wear-resistant parts of the mechanical pump.

[0222] Example 5

[0223] Reference Figure 10 , Figure 11 and Figure 4 , Figure 5 , Figure 6 A method for manufacturing wear-resistant components for a metal-based composite ceramic mechanical pump includes the following steps:

[0224] The wear-resistant component of the mechanical pump is a rear guard plate 31 with a diameter of 700 mm and a thickness of 40 mm; in other embodiments, the rear guard plate can be replaced with a front guard plate.

[0225] Step 1: Fabricate the molding cavity shell and supplementary pressure clamping mold according to the wear-resistant parts of the mechanical pump;

[0226] Step 1 is the same as in Example 4;

[0227] Step 2: Prepare the mixed ingredients 31;

[0228] The mixed material 31 is selected from structural ceramic particles and brazing metal, with a volume ratio of 5.5-5.8:4.2-4.5.

[0229] The structural ceramic particles selected are silicon carbide structural ceramic particles with a particle size of 0.5 to 0.3 mm;

[0230] The brazing metal is an aluminum-copper-titanium alloy;

[0231] Step 3: Fabricate wear-resistant parts for the mechanical pump;

[0232] Step 3.1: Load the mixed material 31;

[0233] The structural ceramic particles are mixed evenly to form a primary compound. The primary compound is then loaded into the molding cavity through the pre-reserved loading port in the replenishment chamber base 15. The cavity is filled, vibrated and compacted, and the loading port is sealed with an isolation plug 1414 with small holes. The replenishment chamber shell 16 is then installed on the replenishment chamber base 15 using an interference fit. The connection is welded with copper solder to seal the molding cavity.

[0234] Simultaneously, the brazing metal is placed into the hot melt system, and the hot melt system is connected to the forming cavity through the melt injection pipe 35;

[0235] Step 3.2: Vacuuming;

[0236] The molding cavity is heated to remove steam. When the temperature reaches the preset vacuum temperature of 350℃~450℃, the gas in the molding cavity is extracted through the vacuum pipe 34, so that the vacuum degree in the molding cavity is higher than 3~30KPa.

[0237] Step 3.3: Inject liquid brazing metal to complete the fabrication of the mixed material 31;

[0238] Then, the temperature of the molding cavity is adjusted to the preset injection temperature of 700℃~750℃, and the brazing metal in the hot melt system is simultaneously adjusted to 820℃~850℃. The brazing metal is pressurized and injected into and fills the molding cavity and the solder replenishment chamber 33, completing the uniform thermal mixing of the mixed material 31, and sealing the air extraction pipe interface base 17 and the melt injection pipe interface base 18.

[0239] Step 3.4: Adjust the temperature of the molding cavity to the preset composite temperature of 700℃~750℃ according to the preset temperature control curve, apply pressure of 0.2MPa, and keep warm for 10 minutes to complete the second-stage low-pressure active composite of metal and ceramic.

[0240] Step 3.5: Install the supplementary pressure mold

[0241] After adjusting the temperature of the molding cavity to the pressurization temperature according to the preset temperature control curve, the molding cavity shell is placed into the pressurization cavity;

[0242] Step 3.6: Perform internal heating isostatic pressing;

[0243] The solder filling chamber 33 is slowly pressurized by the pressure column 23, so that the liquid brazing metal in the solder filling chamber 33 flows into the forming cavity under pressure and the pressure is evenly transmitted in the forming cavity, generating thermal isostatic pressure in the forming cavity; the pressure is slowly controlled to make the thermal isostatic pressure in the forming cavity higher than 15MPa; under this pressure, high-pressure diffusion composite is carried out in the forming cavity, and diffusion composite is completed by holding at 700℃~720℃ for 2 minutes;

[0244] Then, asynchronous pressurization is continued on the solder replenishment chamber 33 on the forming cavity, while cooling is carried out according to the set cooling curve. During cooling, the pressure inside the forming cavity remains constant, so that the forming cavity cools slowly from the part away from the solder replenishment chamber 33 first, so that the liquid brazing metal inside the forming cavity gradually solidifies. During the process, it is necessary to ensure that the brazing metal to be injected into the forming cavity in the solder replenishment chamber 33 is always in a liquid state. When the temperature of the forming cavity drops below the melting point of the brazing metal, the pressure is removed, the replenishment pressurization mold is opened, and the forming cavity shell is taken out.

[0245] Step 3.8: Remove the molding cavity shell.

[0246] First, cool the molding cavity shell, then use local heating to remove the solder filler 33, the evacuation pipe 34 interface, and the molten liquid injection pipe 35 interface, and remove the excess material in the filler 15, the evacuation pipe interface base 17, and the molten liquid injection pipe interface base 18.

[0247] The connection between the cavity shell ring 11 and the cavity shell bottom 12, and the cavity shell ring 11 and the cavity shell cover 13 is locally heated to melt the welding metal first, and then the cavity shell bottom 12 and the cavity shell cover 13 are cooled to cause the cavity shell bottom 12 and the cavity shell cover 13 to shrink and separate from the cavity shell ring 11. The cavity shell bottom 12, the cavity shell cover 13 and the cavity shell ring 11 are removed to obtain a semi-finished product.

[0248] The semi-finished product is heated to 200°C, and then cooling airflow is introduced through the cooling channels on the center support 65 to cool the center support 65. After the center support 65 is removed, it is repaired to obtain the wear-resistant parts of the mechanical pump.

Claims

1. A method for manufacturing wear-resistant components of a metal-based composite ceramic mechanical pump, characterized in that, Includes the following steps: Step 1: Fabricate the molding cavity shell and supplementary pressure clamping mold according to the wear-resistant parts of the mechanical pump; The molding cavity shell includes a cavity shell bottom, a cavity shell cover, a cavity shell ring, and a core mold. The cavity shell bottom, cavity shell cover, and cavity shell ring constitute an outer shell. The core mold is disposed inside the outer shell, and a molding cavity is formed between the core mold and the inner wall of the outer shell. The cavity shell cover is provided with a vacuum pipe interface base, a molten metal injection pipe interface base, and at least one solder filler base. The solder filler base is provided with a solder filler shell communicating with the molding cavity. The solder filler shell contains a solder filler. The solder filler and the molding cavity are separated by an isolation plug with small holes. The vacuum pipe interface base and the molten metal injection pipe interface base are respectively provided with a vacuum pipe and a molten metal injection pipe. The core mold is made of metal, or of a solvent-soluble material, or of an inner metal and an outer solvent-soluble material, or of an outer metal and an inner solvent-soluble material. The metal is provided with multiple cooling channels. The solvent-soluble material includes soluble chloride particles. The solder replenishment pressurization mold includes an upper plate, at least one pressurizing column, and a lower plate. A pressurization cavity is formed between the upper plate, all pressurizing columns, and the lower plate. The pressurization cavity is used to house the forming cavity shell. Temperature control devices are provided in the upper plate and the lower plate. The pressurizing column is used to pressurize the solder replenishment chamber. Step 2: Prepare the mixing materials; The mixed material comprises structural ceramic particles, metal particles, active solder, and brazing metal in a volume ratio of 4~6.8:0~3:0~1.2:3~4.5; the structural ceramic particles are one or a combination of several of alumina, silicon carbide, silicon nitride, quartz, and silane structural ceramic particles, with a particle size of 0.08~4.5 mm; the metal particles are particles with a diameter of 0.3~1.5 mm and / or steel alloy wires with a diameter of 0.2~1 mm and a length of 2~10 mm; the active solder comprises at least one of an active reactive material and an auxiliary brazing material, the active reactive material being titanium and titanium hydride, the auxiliary brazing material being a copper alloy and boron oxide, and the brazing metal being a 5-series aluminum alloy; Step 3: Fabricate wear-resistant parts for the mechanical pump; The brazing metal in the mixed material is placed into a hot melt system, and other materials are loaded into a molding cavity. Under vacuum and a preset temperature, the molten brazing metal is injected into the molding cavity, and the base of the evacuation pipe interface and the base of the molten liquid injection pipe interface are sealed. Then, the mixed material in the molding cavity is subjected to heat preservation and pressure composite molding using hot isostatic pressing technology. After cooling, the molding cavity shell is removed according to preset requirements to obtain the wear-resistant part of the mechanical pump. The preset temperature is 20~450℃ above the highest melting point of the brazing metal in step 3. The specific steps are as follows: Step 3.1: Place the brazing metal into the hot melt system and connect the hot melt system to the molding cavity through the melt injection pipe; at the same time, mix other materials evenly to make a preliminary compound mixture, fill the molding cavity with the preliminary compound mixture, vibrate and compact it, and then seal the molding cavity. Step 3.2: Heat the molding cavity to remove steam. When the temperature reaches the preset vacuum temperature of 250℃~450℃, extract the gas in the molding cavity through the vacuum tube. Step 3.3: Adjust the temperature of the molding cavity to the preset injection temperature of 700℃~750℃, and simultaneously adjust the brazing metal in the hot melt system to 750℃~920℃. Pressurize and inject the brazing metal into the molding cavity to complete the uniform thermal mixing of the mixed materials. Seal the base of the air extraction pipe interface and the base of the melt injection pipe interface. Step 3.4: Place the molding cavity shell into the pressurization chamber; Step 3.5: Adjust the temperature of the molding cavity to the preset composite temperature of 700℃~750℃ according to the preset temperature control curve, apply pressure of 0.2 MPa~0.3 MPa, and keep warm for 10~15 minutes; Step 3.6: Slowly pressurize the solder filling chamber through the pressure column, so that the liquid brazing metal in the solder filling chamber flows into the forming cavity under pressure and the pressure is evenly transmitted in the forming cavity to generate thermal isostatic pressure; control the applied pressure to make the thermal isostatic pressure in the forming cavity equal to 15~20MPa, and hold at 700℃~980℃ for 1~2 minutes to complete the diffusion composite; Then, the solder filler chamber on the forming cavity is pressurized asynchronously, and the temperature is lowered according to the set cooling curve. During the cooling, the pressure inside the forming cavity remains unchanged, so that the forming cavity cools down from the part away from the solder filler chamber first. When the temperature of the forming cavity drops below the melting point of the brazing metal, the pressure is removed, the filler pressurization mold is opened, and the forming cavity shell is taken out. Step 3.7: Remove the molding cavity shell and core mold, and after repair, obtain the wear-resistant parts of the mechanical pump.

2. The method for manufacturing wear-resistant components of a metal-based composite ceramic mechanical pump according to claim 1, characterized in that: In step 1, the wear-resistant component of the mechanical pump is an impeller; The core mold includes an inner support, a central support, an outer support, multiple blades, multiple blade heads, and a shaft seat; the inner support and the shaft seat are respectively located at the center of the cavity bottom and the cavity cover, the central support is located on the top surface of the inner support, the top surface, bottom surface, and outer side wall of the outer support are in contact with the cavity cover, the cavity bottom, and the cavity ring, respectively, and the inner end of each blade is connected to the central support through the blade head, and the outer end is connected to the inner side wall of the outer support; Step 1 specifically involves: Step 1.1: Fabricate the molding cavity shell; Step 1.1.1: Fabricate the following components according to the wear-resistant parts of the mechanical pump: chamber bottom, chamber cover, chamber ring, filler chamber, inner support, center support, outer support, shaft seat, blade, and multiple blade heads. Make a base for the replenishment chamber, a base for the evacuation pipe interface, and a base for the injection pipe interface on the cavity cover; Step 1.1.2: Heat the base of the filler chamber, the base of the evacuation pipe interface, and the base of the molten liquid injection pipe interface on the cavity cover respectively. Install the filler chamber shell, the filler chamber, the evacuation pipe interface, and the molten liquid injection pipe interface respectively by interference fit, and then weld the connection with copper solder. Apply a release agent to the cavity bottom, cavity cover, cavity ring, inner support, central support, outer support, shaft seat, blade, and multiple blade heads; then heat the cavity ring and install it on the cavity bottom with an interference fit, and weld the connection with copper solder; then install the inner support, central support, outer support, shaft seat, blade, and multiple blade heads in sequence at the designated positions, and at the same time use the central support to install at least one metal connector at the designated position; Step 1.2: Make a supplementary pressure card mold.

3. The method for manufacturing wear-resistant components of a metal-based composite ceramic mechanical pump according to claim 2, characterized in that, Step 3.1 specifically involves: The structural ceramic particles are mixed evenly to form a primary compound. The primary compound is then loaded into the molding cavity through the pre-reserved loading port in the base of the reward chamber. The cavity is filled, vibrated and compacted, and then the reward chamber shell is installed on the base of the reward chamber using an interference fit. The connection is welded with copper solder to seal the molding cavity.

4. The method for manufacturing wear-resistant components of a metal-based composite ceramic mechanical pump according to claim 1, characterized in that: In step 1, the wear-resistant component of the mechanical pump is a rear guard plate or a front guard plate; the core mold is a central support, and the upper and lower ends of the central support are in contact with the cavity cover and the cavity bottom, respectively. Step 1 specifically involves: Step 1.1: Fabricate the molding cavity shell; Step 1.1.1: Fabricate the chamber bottom, chamber cover, chamber ring, filling chamber shell, and center support according to the wear-resistant parts of the mechanical pump. Make a base for the replenishment chamber, a base for the evacuation pipe interface, and a base for the molten liquid injection pipe interface on the cavity cover; Step 1.1.2: Heat the vacuum pipe interface base and the molten liquid injection pipe interface base on the cavity cover respectively, install the vacuum pipe interface and the molten liquid injection pipe interface respectively by interference fit, and then weld the connection with copper solder. Apply a release agent to the cavity bottom, cavity cover, cavity ring, and center support; then heat the cavity ring and install it on the cavity bottom with an interference fit, and weld the connection with copper solder; then install the center support in the set position. Install at least one metal connector on the inner wall of the cavity cover, heat the cavity ring, install the cavity cover on the cavity ring by interference fit, and weld the connection with copper solder. Step 1.2: Make a supplementary pressure card mold.

5. A method for manufacturing wear-resistant components of a metal-based composite ceramic mechanical pump according to claim 4, characterized in that, Step 3.1 specifically involves: The brazing metal is placed into the hot melt system, and the hot melt system is connected to the molding cavity through the molten liquid injection pipe. At the same time, other materials are mixed evenly to form a preliminary compound. The preliminary compound is loaded into the molding cavity through the pre-reserved loading port in the base of the reward chamber. The cavity is filled, vibrated and compacted, and then the reward chamber shell is installed on the base of the reward chamber using an interference fit. The connection is welded with copper solder to seal the molding cavity.

6. A method for manufacturing wear-resistant components of a metal-based composite ceramic mechanical pump according to any one of claims 1 to 5, characterized in that, The steps preceding step 3.1 also include: Add anhydrous ethanol to the active solder and mix thoroughly, then mix thoroughly with all the structural ceramic particles.

7. A method for manufacturing wear-resistant components of a metal-based composite ceramic mechanical pump according to claim 6, characterized in that: In step 3.3, before adjusting the temperature of the molding cavity to the preset injection temperature of 700℃~750℃, the following steps are also included: adjusting the temperature of the molding cavity to the preset first-level composite temperature of 900℃ according to the preset temperature control curve, reaching above the melting point of the active solder, so that the active solder melts and reacts with the surface of the structural ceramic particles, and holding the temperature for 10 minutes.

8. A method for manufacturing wear-resistant components of a metal-based composite ceramic mechanical pump according to any one of claims 1 to 5, characterized in that, Step 3.7 specifically involves: First, cool the molding cavity shell, then use local heating to remove the solder filler chamber, evacuation pipe interface, and molten metal injection pipe interface, and remove excess material from the filler chamber base, evacuation pipe interface base, and molten metal injection pipe interface base; The connection between the cavity shell ring and the cavity shell bottom, and the cavity shell ring and the cavity shell cover is locally heated to melt the welding metal first, and then the cavity shell bottom and the cavity shell cover are cooled to cause the cavity shell bottom and the cavity shell cover to shrink and separate from the cavity shell ring. The cavity shell bottom, the cavity shell cover and the cavity shell ring are removed to obtain a semi-finished product. Heat the semi-finished product to a temperature of 200℃~350℃, then introduce cooling airflow through cooling channels to rapidly cool the core mold, separating the core mold from the mixed material and removing the core mold; or, use a pressurized water gun to flush away the soluble material and remove the core mold. Finally, after finishing, wear-resistant parts for the mechanical pump are obtained.

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