Manufacturing method of steel-cored aluminum deoxidizer block

Abstract

The invention discloses a manufacturing method of a steel-cored aluminum deoxidizer block, which comprises the following steps of: a, adding aluminum powder and a steel core into a mold, and wrapping the steel core inside the aluminum powder; step b, extruding the aluminum powder and the steel core in the die by using an extrusion device to obtain a steel core aluminum deoxidizer block; and c, the steel-cored aluminum deoxidizer block obtained in the step b is taken out and put into a heating furnace to be heated to 450-500 DEG C, the temperature is kept for 2-3 h, and the finished steel-cored aluminum deoxidizer block is obtained. The extrusion device is used for extrusion, the aluminum powder and the iron core can be tightly combined together, the aluminum powder on the outer layer can form a compact aluminum layer, oxygen permeation is prevented, and therefore the burn out rate of aluminum in the production process is reduced, then the steel-cored aluminum deoxidizing agent block formed through extrusion is put into a heating furnace to be heated, redundant water and smoke can be removed, and the production efficiency is improved. Therefore, the crystal structure of the metal is perfected, and the hardness and the strength of the finished steel-cored aluminum deoxidizer block are improved.

Description

Technical Field

[0001] The invention relates to the technical field of steelmaking deoxidizer manufacturing, and in particular to a method for manufacturing a steel core aluminum deoxidizer block. Background Art

[0002] Steel core aluminum deoxidizer block is a functional material used in the steel smelting process, mainly used to remove oxygen from molten steel, thereby improving the purity and performance of steel. With the increasing demand for high-quality steel in modern industry, the deoxidation process has become particularly important in steel production.

[0003] However, in the current steel production, the manufacturing process of steel core aluminum deoxidizer blocks is relatively complicated, which not only requires a lot of labor and machinery costs, but also leads to low output and high product prices. In addition, the deoxidizer blocks produced by traditional processes have a rough appearance and unstable aluminum content distribution. These problems directly affect their deoxidation effect in practical applications and limit their full performance. Therefore, optimizing the production process, reducing costs and improving product quality have become key issues that need to be urgently solved in this field. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a method for manufacturing a steel core aluminum deoxidizer block.

[0005] The present disclosure provides a method for manufacturing a steel core aluminum deoxidizer block, comprising the following steps: Step a: adding aluminum powder and a steel core into a mold, wherein the steel core is wrapped inside the aluminum powder; Step b: using an extrusion device to extrude the aluminum powder and the steel core in the mold to obtain a steel core aluminum deoxidizer block; Step c: Take out the steel core aluminum deoxidizer block obtained in step b, put it into a heating furnace and heat it to 450-500° C., keep it for 2-3 hours, and obtain a finished steel core aluminum deoxidizer block.

[0006] In one embodiment of the present disclosure, the step a further comprises: Step S100, loading aluminum powder into the mold, placing a steel core on the upper surface of the aluminum powder, and performing a first extrusion on the aluminum powder and the steel core in the mold using an extrusion device; Step S200, continue to add aluminum powder into the mold of step S100, so that the aluminum powder fills the mold after extrusion and covers the steel core.

[0007] In one embodiment of the present disclosure, step a includes: loading aluminum powder into the mold as a base material, placing a steel core on top of the base material, and loading aluminum powder again as a top material, wherein the top material is filled around and on top of the steel core.

[0008] In one embodiment of the present disclosure, the bottom of the mold in step a is provided with a lower mold, a top core is provided in the lower mold, and the top core and the lower mold are configured to be able to independently reciprocate in the mold along the vertical direction; step a further includes: S10: Add aluminum powder into the mold as a base material; S20: After the top core is pushed up to a first height, a steel core is placed on the top of the bottom material at a position corresponding to the top core; S30, continue to add aluminum powder into the mold as top material, and the top material is filled to the surrounding gap and the top of the steel core, so that the top material and the bottom material wrap the steel core.

[0009] In one embodiment of the present disclosure, step S10 includes: S10a, after the lower mold and the top core are controlled to rise to a predetermined height, aluminum powder is loaded into the mold as a base material; S10b, controlling the lower mold and the top core to return downward, and the bottom material is configured to move downward along with the lower mold and the top core under the action of its own gravity.

[0010] In one embodiment of the present disclosure, in the step S10a and the step S10b, the lower mold and the top core are configured to move synchronously or independently.

[0011] In one embodiment of the present disclosure, in the step b, the extrusion device is configured such that when pressing down in the mold, the top core is pressed to move downward until it is flush with the top of the lower mold.

[0012] In one embodiment of the present disclosure, the step b further includes that after the extrusion device completes the extrusion, the lower die and the top core are configured to eject the extruded steel core aluminum deoxidizer block upwards.

[0013] In one embodiment of the present disclosure, in the finished steel core aluminum deoxidizer block obtained in step c, the weight ratio of the internal steel core and the external aluminum powder is 4:6.

[0014] In one embodiment of the present disclosure, the manufacturing method further includes step d: placing the finished steel core aluminum deoxidizer block in step c into a mold for re-extrusion.

[0015] The present invention provides a method for manufacturing a steel core aluminum deoxidizer block, firstly adding aluminum powder and a steel core into a mold, then using an extrusion device to extrude the aluminum powder and the steel core in the mold to obtain a steel core aluminum deoxidizer block, and then putting the obtained steel core aluminum deoxidizer block into a heating furnace, at 450-500°C, for 2-3 hours, to obtain a finished steel core aluminum deoxidizer block. The present invention extrude the aluminum powder and the steel core in the mold through an extrusion device, so that the aluminum powder and the iron core are tightly combined together, and the outer layer of aluminum powder can form a dense aluminum layer, thereby preventing oxygen penetration and reducing the aluminum burning rate in the production process. The extrusion process can not only significantly improve the performance and quality of the product, but also effectively prevent aluminum powder from polluting the environment and reduce the material cost of the steel plant. Then, the extruded steel core aluminum deoxidizer block is placed in a heating furnace for heating to remove excess impurities such as excess moisture, smoke, pollutants, etc., thereby improving the crystal structure of the metal and improving the hardness and strength of the finished steel core aluminum deoxidizer block.

[0016] Among other things, other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0018] Figure 1 It is a process flow chart of a method for manufacturing a steel core aluminum deoxidizer block provided in one embodiment of the present disclosure. DETAILED DESCRIPTION

[0019] In order to make the invention purpose, technical solution and beneficial technical effect of the present application clearer, the present application is described in detail below in conjunction with specific embodiments. It should be understood that the embodiments described in this specification are only for explaining the present application, not for limiting the present application.

[0020] For simplicity, only some numerical ranges are explicitly disclosed herein. However, any lower limit can be combined with any upper limit to form an unambiguous range; and any lower limit can be combined with other lower limits to form an unambiguous range, and any upper limit can be combined with any other upper limit to form an unambiguous range. In addition, although not explicitly stated, each point or single value between the range endpoints is included in the range. Thus, each point or single value can be combined as its own lower limit or upper limit with any other point or single value or with other lower limits or upper limits to form an unambiguous range.

[0021] In the description of this article, it should be noted that, unless otherwise specified, "above" and "below" are inclusive of the number itself, and "several" in "one or several" means two or more.

[0022] The above-mentioned summary of the invention of the present application is not intended to describe each disclosed embodiment or each implementation in the present application. The following description more specifically illustrates exemplary embodiments. In many places throughout the application, guidance is provided by a series of examples, which can be used in various combinations. In each example, enumeration is only used as a representative group and should not be interpreted as exhaustive.

[0023] First, the terms involved in one or more embodiments are explained.

[0024] Aluminum burnout: Aluminum burnout refers to the phenomenon that under high temperature conditions, aluminum reacts chemically with oxygen in the air to produce aluminum oxide.

[0025] Solution heat treatment: Solution heat treatment refers to heating the alloy to the solution temperature to completely dissolve the solute in the solid solution and form a uniform solid solution. At the solution temperature, the solute atoms in the alloy will diffuse to the grain boundaries and the crystals, rearranging the crystal structure to form a uniform solid solution. Among them, the grain boundary refers to the interface between adjacent grains in polycrystalline materials; the crystal refers to the area inside a single grain, that is, the part of the crystal where the atoms are arranged regularly.

[0026] like Figure 1 As shown, this embodiment provides a method for manufacturing a steel core aluminum deoxidizer block, which specifically includes the following steps: Step a: adding aluminum powder and a steel core into a mold, wherein the steel core is wrapped inside the aluminum powder; Step b: using an extrusion device to extrude the aluminum powder and the steel core in the mold to obtain a steel core aluminum deoxidizer block; Step c: Take out the steel core aluminum deoxidizer block obtained in step b, put it into a heating furnace and heat it to 450-500° C., keep it for 2-3 hours, and obtain a finished steel core aluminum deoxidizer block.

[0027] Specifically, in step a, aluminum powder with a purity of 99.3% or more and a steel core are loaded into a mold so that the steel core is wrapped inside the aluminum powder; wherein, since the purity of the aluminum powder will directly affect the performance of the final product, according to the steel mill's quality requirements for the steel core aluminum deoxidizer, the aluminum content of the outer aluminum powder should not be less than 98.5%. This is because, if the purity of the aluminum powder is insufficient, impurities may be introduced, and these impurities will reduce the oxidation resistance of the aluminum powder, thereby affecting the overall performance of the product. In practical applications, high-purity aluminum powder can react more efficiently with oxygen in molten steel to generate stable aluminum oxide, thereby achieving the purpose of deoxidation. Compared with low-purity aluminum powder, high-purity aluminum powder has higher reaction activity, faster deoxidation efficiency, and the generated aluminum oxide particles are finer and easy to be discharged from the molten steel. Although higher purity aluminum powder may bring better performance, its preparation cost will also increase accordingly. After technical and economic analysis, this application selects the standard of aluminum powder purity greater than or equal to 99.3%, which can not only ensure that the performance of the product reaches the expected goal, but also take into account the rationality of production costs, and achieve the best balance between performance and cost.

[0028] In step b, the aluminum powder and the steel core in the mold are extruded by an extrusion device to form a preliminary combination, namely, a steel core aluminum deoxidizer block. Extrusion by an extrusion device can ensure that the aluminum powder is fully compacted and firmly attached to the surface of the steel core. The outer layer of aluminum powder can form a dense aluminum layer in this process to prevent oxygen penetration, thereby reducing the burning rate of aluminum in the production process.

[0029] In the traditional production process, the casting method may cause pores when the aluminum liquid solidifies, thus affecting the product quality. The present invention adopts an extrusion process, so that the aluminum powder is completely wrapped inside the mold and isolated from the outside air. This closed operation avoids the direct exposure of the aluminum powder to the air, thereby reducing the burning caused by the oxidation reaction. In addition, the external force extrusion can also effectively reduce the generation of pores in the product, thereby improving the quality of the product steel core aluminum deoxidizer block. By reducing the burning rate of aluminum powder, the extrusion process can significantly improve the utilization rate of materials, thereby reducing the material cost of the steel plant. At the same time, high-quality steel core aluminum deoxidizer blocks can achieve higher deoxidation efficiency in the metallurgical process, further saving the operating costs of the steel plant. Therefore, the use of the extrusion process can not only significantly improve the performance and quality of the product, but also effectively reduce the material cost of the steel plant.

[0030] Furthermore, silicon and manganese are common alloying elements in steel cores. Although they can improve the strength, hardness and corrosion resistance of steel to a certain extent, their excessive content may have a significant negative impact on the performance of the product. Specifically: when there is too much silicon in the steel core, silicon may react with other components in the molten steel (such as oxygen or other impurities) to form non-metallic inclusions (such as silicate inclusions). These inclusions will not only reduce the purity of the molten steel, but may also cause problems such as cracks or increased brittleness inside the steel, thereby affecting the mechanical properties and service life of the final product. In addition, excessive manganese may also react with sulfur in the molten steel to form manganese sulfide inclusions, which are likely to form stress concentration points inside the steel, thereby weakening the fatigue resistance and welding performance of the steel.

[0031] Therefore, in order to ensure the stability and reliability of the steel core aluminum deoxidizer block, the content of silicon and manganese in the steel core must be strictly controlled. The present disclosure optimizes the chemical composition design of the steel core to limit the silicon content to less than 0.2% and the manganese content to less than 0.5%. This low silicon and low manganese design concept can effectively prevent the steel core from having adverse reactions with other components in the molten steel when participating in the metallurgical reaction, thereby ensuring the purity of the molten steel and the quality of the final product to the greatest extent.

[0032] Table 1 shows the test report of the steel core used in the present disclosure. According to the data in the table, the actual contents of silicon and manganese in the steel core meet the above requirements. This strict composition control not only helps to improve the deoxidation efficiency of the steel core aluminum deoxidizer block, but also effectively improves the quality of the molten steel, providing a reliable guarantee for the subsequent production of steel.

[0033]

[0034] Table 1 In step c, the steel core aluminum deoxidizer block obtained in step b is taken out and subjected to solution heat treatment, that is, the taken out steel core aluminum deoxidizer block is placed in a heating furnace and heated to 450-500° C. for 2-3 hours. During the production process, the steel core aluminum deoxidizer block may absorb a certain amount of environmental moisture. If this moisture is not effectively removed, it may decompose into hydrogen during subsequent high-temperature use, resulting in a decrease in product performance and even causing safety hazards. The present disclosure gradually heats the steel core aluminum deoxidizer block to 450-500° C. through a solution heat treatment technology, which can ensure that the moisture is completely evaporated, thereby improving the stability of the product.

[0035] In addition, during the extrusion process in step b, some organic matter or other chemicals may remain on the steel core aluminum deoxidizer block. These substances will decompose into volatile gases or harmless residues at high temperatures. Solution heat treatment can also help to remove these substances and remove oxides or other impurities that may exist on the surface of the steel core and aluminum powder, thereby avoiding contamination of the product or affecting its functional characteristics, and further improving the bonding strength and interface quality between the two.

[0036] Furthermore, step c can not only remove excess impurities such as excess moisture, flue gas, and pollutants, but also completely dissolve the solute in the solid solution to form a uniform solid solution. For aluminum alloys, the solid solution temperature is generally around 450°C-500°C. In this temperature range, the solute atoms have a high diffusion rate. If the temperature is too high, it may cause the aluminum powder to melt or the steel core to oxidize. If the temperature is too low, the diffusion behavior of the solute atoms cannot be fully activated. At the solid solution temperature, the diffusion of solute atoms will cause the crystal structure to rearrange, making the stress state inside the material more balanced. This rearrangement not only enhances the mechanical properties of the material, but also improves its corrosion resistance and oxidation resistance. Since the solute atoms (such as magnesium, silicon, copper, etc.) in the steel core need sufficient time to diffuse into the lattice of the base metal (aluminum), in order to ensure the uniformity of the heat treatment, the present disclosure needs to be maintained for 2-3 hours after reaching the solid solution temperature to ensure that the solute atoms have enough time to diffuse from the grain boundary or local enrichment area to the entire grain interior to form a uniform solid solution. A holding time of 2-3 hours can meet the diffusion needs of most solute atoms while avoiding unnecessary energy waste or material performance degradation due to too long a holding time. If the holding time is insufficient, the solute atoms may not be able to fully diffuse into the lattice of the base metal, resulting in uneven distribution. This unevenness can affect the mechanical properties and functionality of the material, such as reducing strength, toughness, and conductivity.

[0037] In one embodiment of the present disclosure, step a further includes: Step S100, loading aluminum powder into the mold, placing a steel core on the upper surface of the aluminum powder, and using an extrusion device to perform a first extrusion on the aluminum powder and the steel core in the mold; Step S200, continuing to load aluminum powder into the mold of step S100, so that the aluminum powder fills the mold after extrusion and covers the steel core.

[0038] Specifically, step a also includes loading aluminum powder into the mold, placing a steel core on the upper surface of the aluminum powder, and using an extrusion device to perform a first extrusion on the aluminum powder and the steel core in the mold, so that the steel core is completely pressed into the aluminum powder under the action of the extrusion device. At this time, the bottom and side surfaces of the steel core are all wrapped by the aluminum powder, and only the top is still exposed to the air, so aluminum powder is continued to be loaded into the mold again, so that the aluminum powder is filled into the mold after extrusion and covers the top of the steel core, which can make the overall structure more uniform and improve the overall mechanical properties of the material.

[0039] Furthermore, through the first extrusion, the steel core is firmly embedded in the aluminum powder, and the aluminum powder fits tightly to the bottom and side of the steel core, thus forming a preliminary wrapping effect. The subsequent second aluminum powder filling and covering further enhances the contact area between the steel core and the aluminum powder, making the combination of the two closer. This multi-level wrapping method helps to eliminate possible gaps or weak points, thereby improving the structural stability of the product. During the first extrusion, the steel core is subjected to pressure from above, and the aluminum powder flows and fills into the gaps around the steel core. After the second filling, the pressure applied again further compacts the entire system, making the pressure of each part of the interior consistent, avoiding the problem of local stress concentration. If too much aluminum powder is filled at one time, there may be large gaps between the aluminum powders. These gaps may become stress concentration points during subsequent use, reducing the mechanical properties of the product, and the excess aluminum powder may not be able to fully fit the surface of the steel core, thereby affecting the bonding strength between the two. Through the step-by-step filling and extrusion method, these problems can be effectively avoided, ensuring the stability and reliability of the product structure.

[0040] In another embodiment of the present disclosure, step a includes: loading aluminum powder into the mold as a base material, placing a steel core on top of the base material, loading aluminum powder again as a top material, and filling the top material around and on top of the steel core.

[0041] Specifically, in another embodiment of the present disclosure, step a includes first adding a bottom material to ensure that the bottom of the steel core has sufficient aluminum powder support; and then adding a top material so that the top material can completely cover the top and surrounding of the steel core. In this embodiment, before extrusion, the steel core is placed in the aluminum powder by adding materials in steps, which can ensure that the surrounding of the steel core can be subjected to the same stress during the subsequent extrusion process, thereby ensuring that the extruded steel core aluminum deoxidizer block is more uniform, which can effectively reduce the interface stress concentration between the steel core and the aluminum powder, and reduce the possibility of interface separation during extrusion or use.

[0042] Furthermore, during the extrusion process, the steel core may shift or tilt due to external forces, thus affecting the geometric accuracy and use effect of the product. By first adding the bottom material to fix the position of the steel core, and then adding the top material to cover it, the movement range of the steel core can be effectively limited to ensure that it remains stable throughout the extrusion process. The shift or tilt of the steel core is one of the main reasons for the production of defective products. By fixing the position of the steel core in advance by adding materials in steps, this risk can be significantly reduced, thereby improving production efficiency and reducing material waste.

[0043] In another embodiment of the present disclosure, a lower mold is provided at the bottom of the mold in step a, a top core is provided in the lower mold, and the top core and the lower mold are configured to independently reciprocate in the mold along the vertical direction; step a further comprises: S10: loading aluminum powder into the mold as a base material; S20: after pushing the top core up to a first height, placing a steel core at the top of the bottom material corresponding to the position of the top core; S30, continuing to load aluminum powder into the mold as a top material, the top material is filled to the surrounding gap and the top of the steel core, so that the top material and the bottom material wrap the steel core.

[0044] Specifically, in another embodiment of the present disclosure, a lower mold is provided at the bottom of the mold, which is used to block the outlet at the bottom of the mold and can reciprocate in the mold. A top core is provided inside the lower mold, which can also reciprocate in the mold along the vertical direction. The top core and the lower mold can move synchronously or independently.

[0045] Therefore, step a can be further refined into three steps. Before step S10 is performed, the lower mold and the top core are simultaneously located at the bottom of the mold. At this time, the lower mold and the top core play the role of closing the bottom of the mold. Then, aluminum powder is loaded into the mold as a bottom material. At this time, the bottom material is located inside the mold and at a certain distance from the top of the mold. After the top core is pushed up to the first height, a steel core is placed at the top of the bottom material corresponding to the position of the top core. Since the cross section of the top core is smaller than the cross section of the mold, part of the bottom material is pushed up during the top core push, and part of the bottom material remains around the top core, forming a layered structure. This layered structure not only enhances the stability of the bottom material, but also provides more accurate spatial positioning for the placement of the steel core. At this time, the top core is placed at the top of the bottom material corresponding to the position of the top core, which can ensure the stability of the steel core. When the top core is pushed up to the first height, the distance from the top of the top core to the bottom of the steel core is equal to the distance from the top of the steel core to the top of the mold. Aluminum powder is then added into the mold as top material, and the top material is filled to the surrounding gap and the top of the steel core, so that the top material and the bottom material wrap the steel core. This addition can ensure that the thickness of the top aluminum powder and the bottom aluminum powder of the extruded steel core aluminum deoxidizer block are the same, avoiding differences in product performance due to uneven thickness.

[0046] Furthermore, the presence of the top core not only helps to position the steel core, but also provides additional support for the steel core during the extrusion process. In particular, in the subsequent extrusion process, when the top core moves downward under pressure, the entire system forms a stable force environment, reducing the shaking or deformation of the steel core during the extrusion process. In addition, since part of the bottom material is pushed up by the top core, while the rest of the bottom material remains around the top core, this layered structure enhances the bonding strength between the steel core and the aluminum powder, and makes it easier for the aluminum powder to flow evenly during the extrusion process.

[0047] In another embodiment of the present disclosure, step S10 includes: S10a, after controlling the lower mold and the top core to rise to a predetermined height, aluminum powder is loaded into the mold as a bottom material; S10b, controlling the lower mold and the top core to reset downward, and the bottom material is configured to move downward with the lower mold and the top core under the action of its own gravity.

[0048] Specifically, step S10 is specifically divided into two steps, including: S10a, after the lower mold and the top core are controlled to rise to a predetermined height, aluminum powder is loaded into the mold as a bottom material. When the lower mold and the top core rise to the predetermined height, a clear bottom material filling area is formed inside the mold. At this time, aluminum powder is loaded as the bottom material, and the filling amount and distribution of the bottom material can be more accurately controlled, which can effectively avoid the problem of uneven filling and aluminum powder splashing caused by loading aluminum powder into the mold at one time, thereby reducing production costs.

[0049] Furthermore, after loading aluminum powder as the base material, the lower mold and the top core are controlled to reset downward, and the base material is configured to move downward with the lower mold and the top core under the action of its own gravity. When the lower mold and the top core are reset downward, the base material will be subject to its own gravity and the constraints of the inner wall of the mold, so that it will sink and compact to a certain extent. This natural compaction process can effectively reduce the gaps in the base material and increase its initial density. At the same time, during the process of the lower mold and the top core being reset downward, the base material will be redistributed in the mold and tend to be flat. This step helps to eliminate local unevenness that may occur during the filling process, thereby ensuring that the base material can be flat and evenly distributed at the bottom of the mold.

[0050] In another embodiment of the present disclosure, in step S10a and step S10b, the lower mold and the top core are configured to move synchronously or independently.

[0051] Specifically, when the lower mold and the top core move synchronously, the two can act together on the material in the mold to form a consistent pressure distribution. For example, in S10a, after the lower mold and the top core are controlled to rise to a predetermined height, aluminum powder is loaded into the mold as a base material. When the lower mold and the top core rise synchronously to a predetermined height, a clear base material filling area is formed inside the mold. At this time, aluminum powder is loaded as the base material, and the filling amount and distribution of the base material can be more accurately controlled, which can effectively avoid the problem of uneven filling and aluminum powder splashing caused by loading aluminum powder into the mold at one time, thereby reducing production costs. When the lower mold and the top core can move independently, their height and position can be adjusted respectively, so as to achieve precise control of local pressure. For example, in S20, when the top core independently pushes up to the first height, it can provide additional support for the steel core during the extrusion process, especially in the subsequent extrusion process, when the top core is under pressure to move downward, the entire system forms a stable force environment, reducing the shaking or deformation of the steel core during the extrusion process.

[0052] In another embodiment of the present disclosure, in step b, the extrusion device is configured such that when pressing down in the mold, the top core is pressed to move downward until it is flush with the top of the lower mold.

[0053] Specifically, when the top core moves downward to be flush with the lower mold, the aluminum powder around the steel core (including the top, sides and bottom) further flows under the pressure of the extrusion device and tightly wraps the steel core. At this time, the top core no longer occupies the space in the mold, thereby providing more filling area for the aluminum powder, ensuring that all surfaces of the steel core are completely covered by aluminum powder to form a complete wrapping structure. In addition, during the extrusion process, resetting the top core can also facilitate the subsequent demoulding operation.

[0054] In another embodiment of the present disclosure, step b also includes that after the extrusion device completes extrusion, the lower die and the top core are configured to eject the extruded steel core aluminum deoxidizer block upwards.

[0055] Specifically, the upward movement of the lower mold and the top core directly pushes the steel core aluminum deoxidizer block out of the mold, avoiding the manual demoulding operation, improving production efficiency, and reducing the risk of product damage caused by improper manual operation. Through the upward ejection of the lower mold and the top core, the steel core aluminum deoxidizer block is evenly stressed as a whole and can be smoothly removed from the mold, effectively protecting the appearance and structural integrity of the product. At the same time, through standardized ejection actions, each demoulding process is consistent, thereby ensuring the quality consistency of each steel core aluminum deoxidizer block. This consistency is not only reflected in the geometric dimensions of the product, but also in its density, strength and other performance indicators.

[0056] In one embodiment of the present disclosure, in the finished steel core aluminum deoxidizer block obtained in step c, the weight ratio of the internal steel core and the external aluminum powder is 4:6.

[0057] Specifically, in order to ensure the balance between deoxidation efficiency and product performance, the weight ratio between the internal steel core and the external aluminum powder is crucial. In the finished steel core aluminum deoxidizer block obtained in step c of the present disclosure, the steel core provides high strength and rigidity, while the aluminum powder increases toughness and ductility. The weight ratio of the internal steel core and the external aluminum powder is set to 4:6, so that the finished steel core aluminum deoxidizer can achieve a balance between strength and toughness. In addition, when the aluminum powder completely wraps the steel core, it can effectively isolate the oxygen in the air, thereby preventing the steel core from oxidizing. The weight ratio of 4:6 further optimizes the covering effect of the aluminum powder on the steel core, significantly extending the service life of the product. This design not only improves the durability of the product, but also ensures its reliability in practical applications. However, if the proportion of aluminum powder is too high, the following problems may occur: the overall strength of the product will decrease, and deformation or cracking may occur during use; at the same time, excessive use of aluminum powder will increase material costs and reduce the cost performance of the product. On the contrary, if the proportion of aluminum powder is too low, the product will become too brittle and hard, lack the necessary toughness and ductility, and easily break when impacted. In addition, insufficient aluminum powder increases the risk of exposing the steel core, which may lead to oxidation or other chemical reactions, thereby weakening the durability of the product.

[0058] Therefore, the weight ratio of the inner steel core to the outer aluminum powder is set to 4:6, aiming to find the best balance between mechanical properties, functional characteristics, production process and economy. This design can not only meet the actual application needs of the product, but also effectively improve production efficiency and product quality, providing reliable guarantee for the practical application of steel core aluminum deoxidizer.

[0059] In one embodiment of the present disclosure, the manufacturing method further includes step d: placing the finished steel core aluminum deoxidizer block in step c into a mold for re-extrusion.

[0060] Specifically, in order to further optimize the structure, performance and functional characteristics of the product, step d is to put the finished steel core aluminum deoxidizer block in step c into a mold for re-extrusion. Although the heat treatment in step c helps to improve the microstructure inside the material, there may still be certain tiny gaps or uneven density. Re-extrusion can further compact the internal structure through high pressure, reduce or eliminate these defects, thereby significantly improving the density of the product, and re-extrusion can also make the aluminum powder wrap the steel core more tightly, increase the contact area between the two, and thus significantly improve the interface bonding strength. Step d controls the pressure distribution by controlling the shape of the mold, further adjusts the geometric dimensions of the product, and improves its appearance quality to make it more in line with the design requirements.

[0061] The present invention provides a method for manufacturing a steel core aluminum deoxidizer block, firstly adding aluminum powder and a steel core into a mold, then using an extrusion device to extrude the aluminum powder and the steel core in the mold to obtain a steel core aluminum deoxidizer block, and then putting the obtained steel core aluminum deoxidizer block into a heating furnace, at 450-500°C, for 2-3 hours, to obtain a finished steel core aluminum deoxidizer block. The present invention extrude the aluminum powder and the steel core in the mold through an extrusion device, so that the aluminum powder and the iron core are tightly combined together, the outer layer of aluminum powder can form a dense aluminum layer to prevent oxygen penetration, thereby reducing the burning rate of aluminum in the production process, and the use of an extrusion process can not only significantly improve the performance and quality of the product, but also effectively prevent aluminum powder from polluting the environment and reduce the material cost of the steel plant. Putting the extruded steel core aluminum deoxidizer block into a heating furnace for heating can remove excess impurities such as excess moisture, smoke, pollutants, etc., thereby improving the crystal structure of the metal and improving the hardness and strength of the finished steel core aluminum deoxidizer block.

[0062] Embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the marketplace, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present invention is defined by the appended claims.

Claims

1. A method for manufacturing a steel core aluminum deoxidizer block, characterized in that: The steps include: Step a: adding aluminum powder and a steel core into a mold, wherein the steel core is wrapped inside the aluminum powder; Step b: using an extrusion device to extrude the aluminum powder and the steel core in the mold to obtain a steel core aluminum deoxidizer block; Step c: Take out the steel core aluminum deoxidizer block obtained in step b, put it into a heating furnace and heat it to 450-500° C., keep it for 2-3 hours, and obtain a finished steel core aluminum deoxidizer block.

2. The manufacturing method according to claim 1, characterized in that: The step a also includes: Step S100, loading aluminum powder into the mold, placing a steel core on the upper surface of the aluminum powder, and performing a first extrusion on the aluminum powder and the steel core in the mold using an extrusion device; Step S200, continue to add aluminum powder into the mold of step S100, so that the aluminum powder fills the mold after extrusion and covers the steel core.

3. The manufacturing method according to claim 1, characterized in that: The step a comprises: loading aluminum powder into the mold as a bottom material, placing a steel core on the top of the bottom material, loading aluminum powder again as a top material, and filling the top material to the periphery and top of the steel core.

4. The manufacturing method according to claim 3, characterized in that: The bottom of the mold in step a is provided with a lower mold, and a top core is provided in the lower mold, and the top core and the lower mold are configured to be able to independently reciprocate in the mold along the vertical direction; The step a also includes: S10: Add aluminum powder into the mold as a base material; S20: After the top core is pushed up to a first height, a steel core is placed on the top of the bottom material at a position corresponding to the top core; S30, continue to add aluminum powder into the mold as top material, and the top material is filled to the surrounding gap and the top of the steel core, so that the top material and the bottom material wrap the steel core.

5. The manufacturing method according to claim 4, characterized in that: The step S10 comprises: S10a, after the lower mold and the top core are controlled to rise to a predetermined height, aluminum powder is loaded into the mold as a base material; S10b, controlling the lower mold and the top core to return downward, and the bottom material is configured to move downward along with the lower mold and the top core under the action of its own gravity.

6. The manufacturing method according to claim 5, characterized in that: In the step S10a and the step S10b, the lower mold and the top core are configured to move synchronously or independently.

7. The manufacturing method according to claim 4, characterized in that: In the step b, the extrusion device is configured so that when pressing down in the mold, the top core is pressed downward to be flush with the top of the lower mold.

8. The manufacturing method according to claim 4, characterized in that: The step b also includes that after the extrusion device completes the extrusion, the lower die and the top core are configured to push out the extruded steel core aluminum deoxidizer block upwards.

9. The manufacturing method according to claim 1, characterized in that: In the finished steel core aluminum deoxidizer block obtained in step c, the weight ratio of the internal steel core and the external aluminum powder is 4:

6.

10. The manufacturing method according to claim 1, characterized in that: The manufacturing method further comprises step d: placing the finished steel core aluminum deoxidizer block in step c into a mold and extruding it again.

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