Erosive wear resistant super-strong metal-ceramic composite pipe and manufacturing method thereof

By using lost foam vacuum casting process and composite binder, combined with vertically arranged ceramic materials and high-chromium cast iron substrate, the problems of interface bonding strength and erosion resistance of metal-ceramic composite pipes are solved, achieving high reliability in erosion and wear resistance and thermal shock stability.

CN121346085APending Publication Date: 2026-01-16HEBEI LIBIN GENERAL EQUIP CO LTD
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Patent Information

Application Number
CN202511360195.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-23
Publication Date
2026-01-16

AI Technical Summary

Technical Problem

Existing metal-ceramic composite pipes have shortcomings in terms of interfacial bonding strength, controllability of ceramic reinforcement structure, and erosion resistance. In particular, they are prone to material failure under high load conditions due to brittle fracture of the ceramic layer and differences in thermal expansion coefficients.

Method used

The lost foam vacuum casting process is used in combination with metal oxide powder/metal powder composite binder. Pyro-Putty 2400 and ZIF-8 type MOFs materials are used to improve the interfacial bonding strength. The ceramic materials are arranged vertically with a high-chromium cast iron substrate, and the nanoporous structure is used to buffer the difference in thermal expansion.

Benefits of technology

A stable erosion rate was achieved within the range of 0-90°, and no interface cracking was observed after thermal cycling, significantly improving the erosion and wear resistance and thermal shock stability of the composite pipe.

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Abstract

The invention provides an erosive wear-resistant super-strong metal-ceramic composite pipe and a manufacturing method thereof, and the erosive wear-resistant super-strong metal-ceramic composite pipe comprises the following components in parts by weight: 76-82 parts of a metal base material, 10-15 parts of a ceramic material, 5-8 parts of a binding agent, 1-1.5 parts of a binder, 1-2 parts of a high-temperature-resistant high-cohesiveness colloid and 5-10 parts of an external supporting structure; the preparation method of the erosive-wear-resistant super-strong metal-ceramic composite pipe comprises the steps of preparation of a primary material, pretreatment of ceramic, preparation of a model, metal smelting and pouring, post-treatment of a casting, preparation of a high-temperature-resistant high-cohesiveness colloid, processing preparation of a pipe body and integrated assembly of the composite pipe, and the prepared composite pipe has excellent erosive wear resistance and high reliability; the device is suitable for the fields of energy exploitation, chemical transmission and the like, and provides a reliable, efficient and environment-friendly solution for industrial pipeline equipment.
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Description

Technical Field

[0001] This invention relates to the field of metal-ceramic composite materials technology, and in particular to an ultra-strong metal-ceramic composite pipe resistant to erosion and wear and its manufacturing method. Background Technology

[0002] In fields such as energy extraction, chemical transmission, and powder conveying, pipeline equipment is subjected to the erosion of solid particles carried by high-speed fluids for extended periods. Erosion wear has become a core issue restricting equipment lifespan and operational safety. The proportion of industrial wear failures directly caused by erosion is significant, especially in oil and gas extraction scenarios. The continuous impact of high-pressure fluids carrying gravel on the pipe wall can lead to significant wall thinning, even causing rupture accidents, resulting in huge economic losses and safety hazards. While traditional metal pipes possess good toughness and weldability, their hardness is insufficient, and their wear resistance cannot meet the demands of high-load conditions. Ceramic pipes, while exhibiting excellent hardness, are brittle, have weak impact resistance, and are expensive to manufacture. Metal-ceramic composite pipes, combining the advantages of a metal matrix and a ceramic reinforcing phase, are considered a key technological direction for solving erosion wear problems; however, existing technologies still have significant shortcomings and urgently require breakthroughs.

[0003] Currently, the mainstream metal-ceramic composite pipes on the market mainly include four structures: patch type, spot-welded clamp type, one-piece molded type, and self-propagating flame type. Patch type composite pipes use ceramic sheet bonding technology, which is inexpensive, but the bonding strength between the ceramic layer and the metal substrate is insufficient, and the ceramic is prone to falling off due to collisions during transportation or installation. Spot-welded clamp type composite pipes fix the ceramic lining through mechanical connection. Although it can withstand high temperatures of 750℃, the welding process is complex, and the manufacturing cost of large-diameter pipes increases significantly. One-piece molded composite pipes achieve metallurgical bonding between the ceramic layer and the metal substrate through centrifugal casting or vacuum casting processes, with high interface bonding strength, but the production cycle is as long as several weeks, and the yield rate is greatly affected by fluctuations in process parameters. Self-propagating flame type composite pipes utilize aluminothermic reaction to generate the ceramic layer in situ. The process is simple, but the elbow area has internal roughness due to welding defects, and it is prone to failure due to accelerated erosion caused by fluid turbulence after long-term use.

[0004] At the manufacturing process level, existing technologies face two major challenges: First, the quality control of the interfacial bonding between the ceramic reinforcing phase and the metal matrix. For example, in the casting infiltration process, the pouring temperature of the molten metal needs to be precisely controlled within 50°C above the liquidus line. Too low a temperature leads to insufficient molten metal penetration and a decrease in the ceramic pore filling rate; too high a temperature may cause oxidation of the molten metal, resulting in shrinkage defects. Furthermore, the pore size design of the ceramic framework must balance the fluidity of the molten metal with the ceramic reinforcement effect. Too small a pore size increases penetration resistance, while too large a pore size weakens the reinforcing effect of the ceramic phase. Second, there is a bottleneck in the preparation of ceramic reinforcements with complex shapes. Traditional methods rely on mold forming or machining, making it difficult to prepare ceramic frameworks with three-dimensional network structures, resulting in poor uniformity of the ceramic reinforcing phase distribution and prominent local stress concentration problems.

[0005] In terms of performance, while existing metal-ceramic composite pipes are significantly superior to single-material pipes in terms of wear resistance, they still have shortcomings in erosion resistance. Under sand-containing fluid erosion conditions, the erosion rate of traditional composite pipes exhibits a non-linear characteristic with the angle of attack. When the angle of attack is greater than 60°, the mass loss rate of the ceramic layer due to brittle fracture increases sharply. In addition, the difference in thermal expansion coefficients between the ceramic layer and the metal matrix easily induces interfacial cracking under thermal shock conditions, further accelerating material failure.

[0006] In summary, existing metal-ceramic composite pipe technologies still face technical bottlenecks in terms of interfacial bonding strength, controllability of ceramic reinforcement structure, and erosion resistance. This invention aims to overcome these limitations by innovating composite pipe structural design and manufacturing processes, providing a metal-ceramic composite pipe solution that combines excellent erosion and wear resistance, high reliability, and controllable manufacturing processes. Summary of the Invention

[0007] This invention provides an erosion- and wear-resistant ultra-strong metal-ceramic composite pipe and its manufacturing method, in order to solve the problems mentioned in the background art.

[0008] To solve the above-mentioned technical problems, the present invention discloses an erosion-resistant and wear-resistant ultra-strong metal-ceramic composite pipe, comprising a metal substrate, ceramic material, binder, adhesive, high-temperature resistant and highly adhesive colloid, and an external support structure, constituting an erosion-resistant and wear-resistant ultra-strong metal-ceramic composite pipe, including a square pipe structure or a circular pipe structure.

[0009] Furthermore, the square tube structure includes: a base plate set on the outside of the square tube body; the base plate is formed by casting molten steel; an iron matrix is ​​set on the inside of the square tube body facing the base plate; the base plate and the iron matrix are bonded together with a metal-ceramic adhesive; multiple sets of ceramic columns are embedded in the iron matrix; ramming material is placed between the ceramic columns; the ceramic columns are partially embedded in the iron matrix, with one end of the ceramic column exposed in the iron matrix to form an inner wear-resistant surface; significantly improving the erosion and wear resistance of the square tube; wedge-shaped irons are set diagonally on the iron matrix to fix it and strengthen the tube body; the iron matrix includes: carbon steel matrix or cast iron matrix;

[0010] The metal substrate, ceramic material, binder, adhesive, high-temperature resistant and highly adhesive colloid, and external support structure, by weight, include: 76-82 parts metal substrate, 10-15 parts ceramic material, 5-8 parts binder, 1-1.5 parts adhesive, 1-2 parts high-temperature resistant and highly adhesive colloid, and 5-10 parts external support structure.

[0011] Furthermore, the circular tube structure includes: an outer steel plate on the outside of the circular tube; a metal-ceramic adhesive layer on the outer steel plate facing the inside of the circular tube; the metal-ceramic adhesive layer bonding the inner steel plate and the ceramic column; the ceramic column embedded in the inner steel plate, with one end of the ceramic column protruding from the inner steel plate to form a wear-resistant surface; and ramming material on the inner surface of the inner steel plate.

[0012] The metal substrate is high-chromium cast iron, the ceramic material is one or more of corundum, ZTA or silicon carbide, the binder includes at least one of metal oxide powder or metal powder, and the external support structure is Q235 steel plate pipe.

[0013] Furthermore, the metal oxide powder is at least one of iron oxide or aluminum oxide, the metal powder is at least one of iron or chromium, and the binder is any combination of one or more of PVA, PVB, water glass, silica sol, and aluminum sol.

[0014] Furthermore, the high-temperature resistant and highly adhesive colloid includes Pyro-Putty 2400 and ZIF-8 type MOF materials.

[0015] Furthermore, the preparation method of the erosion and wear resistant ultra-strong metal-ceramic composite pipe includes the following steps:

[0016] S1. Preparation of initial materials: Mix at least one of metal oxide powder or metal powder to prepare a binder;

[0017] S2. Pre-treatment of ceramics: Add 1 part of binder to the binder to make a slurry, and apply it to the surface of the ceramic material with a thickness of 3mm.

[0018] S3. Model preparation: Make a lost foam model in the easily worn parts, fix the ceramic material and assemble the gating system, dry it, apply lost foam coating and dry it again.

[0019] S4. Metal melting and casting: High-chromium cast iron is melted in an intermediate frequency furnace, and the molten steel is poured into the mold under vacuum to complete the sand box vacuum forming to produce composite castings.

[0020] S5. Post-casting treatment: Clean the composite casting 24 hours after pouring, remove residual sand and perform surface pretreatment to obtain ceramic composite casting plate;

[0021] S6. Preparation of high-temperature resistant and high-adhesion colloid: Mix 10 parts of Aremco Products Inc.'s Pyro-Putty 2400 and 1.2 parts of ZIF-8 type MOFs material to prepare a high-temperature resistant and high-adhesion colloid;

[0022] S7. Pipe body processing preparation: The Q235 steel plate pipe is made into a square or round pipe, and the inner wall is uniformly coated with a high temperature resistant and high adhesion colloid.

[0023] S8. Composite pipe integrated assembly: The ceramic composite casting plate is attached to the glued pipe wall and welded and fixed through the reserved weld joint to produce a metal-ceramic composite pipe with high resistance to erosion and wear.

[0024] Furthermore, the drying temperature of the lost foam model is 50-80℃, and the drying time is 12-15 hours.

[0025] Furthermore, the negative pressure of vacuum casting is -0.04 to -0.06 MPa, and the casting temperature of molten steel is 1450-1550℃.

[0026] Furthermore, the distribution density of ceramic materials within the lost foam model is 5-8 particles per square decimeter.

[0027] Furthermore, the ceramic material is arranged perpendicular to the direction of fluid flow on the inner wall of the tube in the height direction.

[0028] Compared with the prior art, the present invention provides an erosion- and wear-resistant ultra-strong metal-ceramic composite pipe and its manufacturing method, which has the following beneficial effects:

[0029] 1. By combining the lost foam vacuum casting process with metal oxide powder / metal powder composite binder, metallurgical bonding between metal substrate and ceramic material is achieved. The synergistic effect of Pyro-Putty 2400 and ZIF-8 type MOFs results in high interfacial bonding strength.

[0030] 2. The ceramic material is arranged perpendicular to the fluid direction, combined with the tough base of high-chromium cast iron, which makes the composite pipe have a stable and strong erosion rate within the range of 0-90° angle of attack.

[0031] 3. The nanoporous structure of ZIF-8 MOFs buffers the difference in thermal expansion. After 10 thermal cycles of 800℃→25℃, the interface did not crack, and the thermal shock stability is strong. Attached Figure Description

[0032] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0033] Figure 1 This is a partial view of a square tube according to an embodiment of the erosion and wear resistant ultra-strong metal-ceramic composite tube of the present invention;

[0034] Figure 2 This is a circular tube diagram of an embodiment of the erosion and wear resistant ultra-strong metal-ceramic composite pipe of the present invention. Detailed Implementation

[0035] The preferred embodiments of the present invention are described below. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0036] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0037] Unless otherwise specified, the examples and comparative examples are parallel experiments with the same components, component content, preparation steps, and preparation parameters. The experimental methods in the following examples are conventional methods unless otherwise specified. Unless otherwise specified, the experimental materials used in the following examples are analytical reagents (AR) and were all purchased from commercial channels.

[0038] A metal-ceramic composite pipe with high erosion and wear resistance includes a metal substrate, ceramic material, binder, adhesive, high-temperature resistant and highly adhesive colloid, and an external support structure, forming a metal-ceramic composite pipe with high erosion and wear resistance, including a square pipe structure or a circular pipe structure.

[0039] like Figure 1As shown, the erosion and wear resistant ultra-strong metal-ceramic composite pipe includes a square pipe structure; it includes: a base plate set on the outside of the square pipe body; the base plate is formed by casting molten steel; an iron matrix is ​​set on the inside of the square pipe body facing the base plate; the base plate and the iron matrix are bonded together by a metal-ceramic adhesive; multiple sets of ceramic columns are embedded in the iron matrix; ramming material is placed between the ceramic columns; the ceramic columns are partially embedded in the iron matrix, with one end of the ceramic column exposed in the iron matrix to form an inner wear-resistant surface; significantly improving the erosion and wear resistance of the square pipe; wedge-shaped irons are set diagonally on the iron matrix to fix it and strengthen the pipe body; the iron matrix includes: carbon steel matrix or cast iron matrix;

[0040] like Figure 2 As shown, the erosion and wear resistant ultra-strong metal-ceramic composite pipe includes a circular pipe structure; it includes: an outer steel plate on the outside of the circular pipe; a metal-ceramic adhesive layer is applied to the outer steel plate facing the inside of the circular pipe; the metal-ceramic adhesive layer bonds the inner steel plate and ceramic column to the circular pipe; the ceramic column is embedded in the inner steel plate, with one end of the ceramic column protruding from the inner steel plate to form a wear-resistant surface; ramming material is applied to the inner surface of the inner steel plate; significantly improving the erosion and wear resistance of the circular pipe.

[0041] ZIF-8 type MOFs material was purchased from XFNANO's XFF28-1, with a particle size of 100-400 nm and a specific surface area of ​​1400 m². 2 / g, pore size 0.34-1.16nm; high chromium cast iron purchased from Baosteel; PVA type 1788 (degree of polymerization 1700, degree of hydrolysis 88%), PVB type BH-3, water glass, silica sol modulus 2.4–3.4.

[0042] Example 1:

[0043] The preparation method of the erosion and wear resistant ultra-strong metal-ceramic composite pipe includes the following steps:

[0044] S1. Preparation of initial materials: By weight, select 80 parts of high-chromium cast iron as the metal substrate and 13 parts of corundum as the ceramic material, and mix 5 parts of iron oxide and 2 parts of chromium to make a binder.

[0045] S2. Pre-treatment of ceramics: Add 1.3 parts of PVA to the binder to make a slurry, and apply it to the surface of the ceramic material with a thickness of 3 mm.

[0046] S3. Model preparation: Make a lost foam model in the easily worn parts, fix the ceramic material and assemble the gating system, dry it, apply lost foam coating and dry it again.

[0047] S4. Metal melting and casting: High-chromium cast iron substrate is melted in an intermediate frequency furnace, and molten steel is poured into a mold under vacuum to complete the sand box vacuum forming to produce composite castings.

[0048] S5. Post-casting treatment: 24 hours after pouring, the composite casting is opened and cleaned to remove residual sand and perform surface pretreatment to obtain ceramic composite casting plate.

[0049] S6. Preparation of high-temperature resistant and high-adhesion colloid: Mix 10 parts of Aremco Products Inc.'s Pyro-Putty 2400 and 1.2 parts of ZIF-8 type MOFs material to prepare a high-temperature resistant and high-adhesion colloid for subsequent bonding of metal pipes and ceramic castings.

[0050] S7. Pipe body processing preparation: Use 8 parts of Q235 steel plate pipe to make a square shape, and evenly coat the inner wall with 2 parts of the prepared high temperature resistant and high adhesion colloid.

[0051] S8. Composite pipe integrated assembly: The ceramic composite casting plate is attached to the glued pipe wall and welded and fixed through the reserved weld joint to produce a metal-ceramic composite pipe with high resistance to erosion and wear.

[0052] Example 2:

[0053] The preparation method of the erosion and wear resistant ultra-strong metal-ceramic composite pipe includes the following steps:

[0054] S1. Preparation of initial materials: By weight, 76 parts of high-chromium cast iron are selected as the metal substrate and 10 parts of ZTA are selected as the ceramic material. 4 parts of alumina and 1 part of chromium are mixed to form a binder.

[0055] S2. Pre-treatment of ceramics: Add 1 part of silica sol to the binder to make a slurry, and apply it to the surface of the ceramic material with a thickness of 3 mm.

[0056] S3. Model preparation: Make a lost foam model in the easily worn parts, fix the ceramic material and assemble the gating system, dry it, apply lost foam coating and dry it again.

[0057] S4. Metal melting and casting: High-chromium cast iron substrate is melted in an intermediate frequency furnace, and molten steel is poured into a mold under vacuum to complete the sand box vacuum forming to produce composite castings.

[0058] S5. Post-casting treatment: 24 hours after pouring, the composite casting is opened and cleaned to remove residual sand and perform surface pretreatment to obtain ceramic composite casting plate.

[0059] S6. Preparation of high-temperature resistant and high-adhesion colloid: Mix 10 parts of Aremco Products Inc.'s Pyro-Putty 2400 and 1.2 parts of ZIF-8 type MOFs material to prepare a high-temperature resistant and high-adhesion colloid for subsequent bonding of metal pipes and ceramic castings.

[0060] S7. Pipe body processing preparation: Use 5 parts of Q235 steel plate pipe to make a round pipe, and evenly coat the inner wall with 1 part of the prepared high temperature resistant and high adhesion colloid.

[0061] S8. Composite pipe integrated assembly: The ceramic composite casting plate is attached to the glued pipe wall and welded and fixed through the reserved weld joint to produce a metal-ceramic composite pipe with high resistance to erosion and wear.

[0062] Example 3:

[0063] The preparation method of the erosion and wear resistant ultra-strong metal-ceramic composite pipe includes the following steps:

[0064] S1. Preparation of initial materials: By weight, 82 parts of high-chromium cast iron are selected as the metal substrate and 15 parts of silicon carbide are selected as the ceramic material. 6 parts of iron oxide and 2 parts of iron are mixed to form a binder.

[0065] S2. Pre-treatment of ceramics: Add 1.5 parts of PVB to the binder to make a slurry, and apply it to the surface of the ceramic material with a thickness of 3 mm.

[0066] S3. Model preparation: Make a lost foam model in the easily worn parts, fix the ceramic material and assemble the gating system, dry it, apply lost foam coating and dry it again.

[0067] S4. Metal melting and casting: High-chromium cast iron substrate is melted in medium frequency furnace and poured into the mold under vacuum. During the casting process, a pulse electric field with a frequency of 1kHz and a field strength of 5kV / cm is applied to promote the metallurgical bonding of the metal-ceramic interface and complete the sand box vacuum forming to produce composite castings.

[0068] S5. Post-casting treatment: 24 hours after pouring, the composite casting is opened and cleaned to remove residual sand and perform surface pretreatment to obtain ceramic composite casting plate.

[0069] S6. Preparation of high-temperature resistant and high-adhesion colloid: Mix 10 parts of Aremco Products Inc.'s Pyro-Putty 2400 and 1.2 parts of ZIF-8 type MOFs material to prepare a high-temperature resistant and high-adhesion colloid for subsequent bonding of metal pipes and ceramic castings.

[0070] S7. Pipe body processing preparation: Use 10 parts of Q235 steel plate pipe to make a square shape, and evenly coat the inner wall with 2 parts of the prepared high temperature resistant and high adhesion colloid.

[0071] S8. Composite pipe integrated assembly: The ceramic composite casting plate is attached to the glued pipe wall and welded and fixed through the reserved weld joint to produce a metal-ceramic composite pipe with high resistance to erosion and wear.

[0072] The ceramic material in the above embodiments is one or more of corundum, ZTA or silicon carbide, and the metal oxide powder is one or two of iron oxide or aluminum oxide, and the metal powder is one or two of iron or chromium.

[0073] Example 4: The preparation method of the erosion and wear resistant ultra-strong metal-ceramic composite pipe includes the following steps:

[0074] S1. Preparation of initial materials: Mix at least one of metal oxide powder or metal powder to prepare a binder;

[0075] S2. Pre-treatment of ceramics: Add 1 part of binder to the binder to make a slurry, and apply it to the surface of the ceramic material with a thickness of 3mm.

[0076] S3. Model preparation: Make a lost foam model in the easily worn parts, fix the ceramic material and assemble the gating system, dry it, apply lost foam coating and dry it again.

[0077] S4. Metal melting and casting: High-chromium cast iron is melted in an intermediate frequency furnace, and the molten steel is poured into the mold under vacuum to complete the sand box vacuum forming to produce composite castings.

[0078] S5. Post-casting treatment: Clean the composite casting 24 hours after pouring, remove residual sand and perform surface pretreatment to obtain ceramic composite casting plate;

[0079] S6. Preparation of high-temperature resistant and high-adhesion colloid: Mix 10 parts of Aremco Products Inc.'s Pyro-Putty 2400 and 1.2 parts of ZIF-8 type MOFs material to prepare a high-temperature resistant and high-adhesion colloid;

[0080] S7. Pipe body processing preparation: The Q235 steel plate pipe is made into a square or round pipe, and the inner wall is uniformly coated with a high temperature resistant and high adhesion colloid.

[0081] S8. Composite pipe integrated assembly: The ceramic composite casting plate is attached to the glued pipe wall and welded and fixed through the reserved weld joint to produce a metal-ceramic composite pipe with high resistance to erosion and wear.

[0082] Furthermore, the drying temperature of the lost foam model is 50-80℃, and the drying time is 12-15 hours.

[0083] Furthermore, the negative pressure of vacuum casting is -0.04 to -0.06 MPa, and the casting temperature of molten steel is 1450-1550℃.

[0084] Furthermore, the distribution density of ceramic materials within the lost foam model is 5-8 particles per square decimeter.

[0085] Furthermore, the ceramic material is arranged perpendicular to the direction of fluid flow on the inner wall of the tube in the height direction.

[0086] Comparative Example 1:

[0087] The difference from Example 1 is that 7 parts by weight of iron oxide is used to make the binder, while the rest is the same as Example 1.

[0088] Comparative Example 2

[0089] The difference from Example 1 is that an equal part by weight of ZIF-8 type MOFs material is missing; otherwise, the contents are the same as in Example 1.

[0090] Performance testing:

[0091] The interfacial bonding strength test was conducted according to ASTM C633. The composite pipe was cut into cylindrical specimens with a diameter of 25 mm. The interface was located at the center of the bonding surface, and the test was performed using a universal testing machine. The erosion rate test was conducted according to ASTM G76, using 50 μm alumina particles, a flow rate of 70 m / s, an angle of attack of 30°–90°, a particle flow rate of 2 g / min, and an erosion time of 30 minutes, using a pneumatic erosion testing machine. The thermal cycling crack density test was conducted according to MIL-STD-883G 1010.8, with the high-temperature end at 800°C (muffle furnace, heating rate 10°C / min) and the low-temperature end at 25°C water quenching (deionized water, cooling rate >50°C / s), for a total of 10 cycles (each high-temperature holding time 15 minutes). The three-point bending strength test was conducted according to ASTM C633. C1161-18, Sample specifications: Dimensions: 40×4×3mm (length×width×thickness), span 30mm; Closed-loop erosion channel system for critical erosion velocity testing, including centrifugal pump, flow velocity sensor (accuracy ±0.1m / s) and transparent observation window, sand concentration: 5wt% (50μm alumina particles), initial flow velocity set at 10m / s, incremented by 5m / s in each step, maintained for 30 minutes, sample surface morphology monitored in real time using Keyence VHX-7000 ultra-depth-of-field microscope, critical flow velocity defined as the flow velocity at which continuous flaking occurs on the surface (mass loss rate > 0.1mg / s), results are shown in Table 1.

[0092] Table 1

[0093]

[0094] As shown in Table 1, the single ceramic binder leads to a decrease in interfacial bonding strength. Metal powder and metal oxide achieve metallurgical bonding by forming a diffusion layer, rather than traditional mechanical interlocking. After removing MOFs, the thermal cycling crack density increases significantly and the bending strength decreases, proving that the nanoporous structure of ZIF-8 can absorb thermal stress.

[0095] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. If these modifications and variations fall within the scope of the claims of this invention and their equivalents, then this invention is also intended to include these modifications and variations.

Claims

1. An erosion and abrasion resistant superstrong metal-ceramic composite pipe, characterized in that, The metal base material, ceramic material, binder, adhesive, high-temperature-resistant and high-adhesion glue, and external support structure form an erosion-resistant and wear-resistant super-strong metal-ceramic composite pipe, which includes a square pipe structure or a circular pipe structure.

2. The erosion resistant, superstrong, metal-ceramic composite pipe of claim 1, wherein, The square pipe structure includes: a bottom plate arranged outside the square pipe body; the bottom plate is formed by pouring molten steel; an iron base is arranged inside the square pipe body from the bottom plate; the bottom plate and the iron base are bonded by a metal ceramic adhesive; a plurality of groups of ceramic columns are embedded in the iron base; ramming material is arranged between the ceramic columns; the ceramic columns are semi-embedded in the iron base, and one end surface of the ceramic columns is exposed from the iron base to form an inner wear-resistant surface; the square pipe's erosion and wear resistance is significantly improved; the iron base is diagonally provided with a wedge-shaped iron fixing to reinforce the strength of the pipe body; the iron base includes: a carbon steel iron base or a cast iron base; The metal base material, ceramic material, binder, adhesive, high-temperature-resistant and high-adhesion glue, and external support structure include, by weight: 76-82 parts of metal base material, 10-15 parts of ceramic material, 5-8 parts of binder, 1-1.5 parts of adhesive, 1-2 parts of high-temperature-resistant and high-adhesion glue, and 5-10 parts of external support structure.

3. The erosion resistant, superstrong, metal-ceramic composite pipe of claim 1, wherein, The circular pipe structure includes: a circular pipe outer wall steel plate arranged outside the circular pipe body; a metal ceramic adhesive layer is arranged inside the circular pipe body from the circular pipe outer wall steel plate; the metal ceramic adhesive layer bonds the circular pipe inner layer steel plate and the ceramic column; the ceramic column is embedded in the circular pipe inner layer steel plate, and one end surface of the ceramic column is exposed from the circular pipe inner layer steel plate to form a wear-resistant surface; ramming material is arranged on the surface of the circular pipe inner layer steel plate towards the inside of the circular pipe; The metal base material is high-chromium cast iron, the ceramic material is one or more than two arbitrary combinations of corundum, ZTA, or silicon carbide, the binder includes at least one of metal oxide powder or metal powder, and the external support structure is a Q235 steel plate pipe.

4. The erosion resistant, superstrong, metal-ceramic composite pipe of claim 3, wherein, The metal oxide powder is at least one of iron oxide or aluminum oxide, the metal powder is at least one of iron or chromium, and the adhesive is one or more than two arbitrary combinations of PVA, PVB, water glass, silica sol, and aluminum sol.

5. The erosion resistant, superstrong, metal-ceramic composite pipe of claim 1, wherein, The high-temperature-resistant and high-adhesion glue includes Pyro-Putty 2400 and ZIF-8 type MOFs material.

6. A method of making an erosion- and corrosion-resistant superstrong metal-ceramic composite pipe, characterized in that, The method includes the following steps: S1, preparing raw materials: mixing at least one of metal oxide powder or metal powder to make a binder; S2, pretreating ceramic: adding 1 part of adhesive to the binder to make a slurry, and applying the slurry with a thickness of 3mm on the surface of the ceramic material; S3, preparing a model: making a lost foam foam model at the easily-worn part, fixing the ceramic material, and assembling a pouring system, then drying and applying a lost foam coating for secondary drying; S4, metal smelting and pouring: smelting high-chromium cast iron in a medium-frequency furnace, pouring the molten steel into the model in a vacuum environment, and completing the vacuum forming of the sand box to make a composite casting; S5, post-processing of the casting: cleaning the composite casting after 24 hours of pouring, removing residual sand, and performing surface pretreatment to obtain a ceramic composite casting plate; S6, preparing high-temperature-resistant and high-adhesion glue: mixing 10 parts of Pyro-Putty 2400 and 1.2 parts of ZIF-8 type MOFs material to make high-temperature-resistant and high-adhesion glue; S7, pipe body processing preparation: Q235 steel plate pipe material into a square or round tube, the inner wall is evenly coated with high temperature and high viscosity colloid; S8, composite pipe integrated assembly: ceramic composite casting plate is attached to the glue pipe wall, through the reserved welding opening welding fixed, made of erosion wear-resistant super metal-ceramic composite pipe.

7. The preparation method according to claim 6, characterized in that, The drying temperature of the lost foam pattern is 50-80℃, and the drying time is 12-15 hours.

8. The preparation method according to claim 6, characterized in that, The negative pressure of vacuum pouring is-0.04~-0.06MPa, and the pouring temperature of molten steel is 1450-1550℃.

9. The preparation method according to claim 6, characterized in that, The distribution density of ceramic material in the lost foam pattern is 5-8 per square decimeter.

10. The method of claim 6, wherein, The ceramic material is arranged vertically in the height direction and the fluid flow direction of the inner wall of the pipe body.