Method for improving plasticity and low-temperature impact toughness of 20SiMn2MoV steel by adding zirconium element

Abstract

The invention relates to the technical field of alloy steel materials, in particular to a method for improving plasticity and low-temperature impact toughness of 20SiMn2MoV steel by adding a zirconium element. Porous zirconium oxide coated ferrozirconium alloy powder is used as a zirconium element carrier, and coated powder with a gradient pore channel structure is prepared through a double-ion liquid template method; the coated powder is prepared by synergistically regulating and controlling the pore structure of the zirconium oxide through 1-octyl-3-methylimidazolium bromide and 1-hexadecyl-3-methylimidazolium bromide ionic liquid, and carrying out hydrothermal reaction and calcination. According to the method, efficient protection and controllable release of the zirconium element are achieved, the problems that in the traditional ferrozirconium alloy adding process, oxidation burning loss is serious, dispersion is uneven and the like are solved, and after pouring at the temperature of 1530-1600 DEG C, multi-section forging, normalizing at the temperature of 930 DEG C, quenching at the temperature of 910 DEG C and tempering heat treatment at the temperature of 220 DEG C, the obtained 20SiMn2MoV steel has excellent strength, plasticity and low-temperature impact toughness.

Description

Technical Field

[0001] This invention relates to the field of alloy steel materials technology, specifically to a method for improving the plasticity and low-temperature impact toughness of 20SiMn2MoV steel by adding zirconium. Background Technology

[0002] 20SiMn2MoV steel is a low-carbon, low-alloy martensitic high-strength steel widely used in engineering machinery, oil drilling tools, mining equipment, and low-temperature load-bearing components. However, with the increasing demands of modern industry on material performance, the problems of insufficient toughness and difficulty in balancing strength and plasticity in traditional 20SiMn2MoV steel (diameter ≥120mm) after heat treatment at low temperatures are becoming increasingly prominent, severely restricting its application under extreme working conditions. Traditional methods improve performance by adjusting the heat treatment process or adding alloying elements such as Ni and Cr, but these methods are costly or have limited effectiveness.

[0003] Microalloying is one of the important means to improve the properties of steel. Zirconium (Zr), as a strong carbonitride forming element, can refine grains and purify molten steel. Its trace addition to low-alloy steel has a certain optimization and improvement effect on plasticity and low-temperature impact performance. However, the traditional method of directly adding zirconium ferroalloy has obvious technical bottlenecks: First, zirconium is chemically active and readily reacts with elements such as oxygen and nitrogen during high-temperature smelting, resulting in a significant reduction in effective zirconium content; second, directly added zirconium ferroalloy has poor dispersibility in molten steel and is prone to local segregation, which not only reduces the utilization rate of zirconium but may also introduce new performance defects due to uneven composition. Summary of the Invention

[0004] In view of this, the purpose of this invention is to propose a method for improving the plasticity and low-temperature impact toughness of 20SiMn2MoV steel by adding zirconium, so as to solve the problem of poor plasticity and low-temperature impact resistance of traditional 20SiMn2MoV steel.

[0005] To achieve the above objectives, this invention provides a method for improving the plasticity and low-temperature impact toughness of 20SiMn2MoV steel by adding zirconium, comprising the following steps: (1) The components C, Si, Mn, Mo, V, P, S, Zr and Fe are mixed according to the set weight percentage, smelted, and then porous zirconium oxide coated zirconium iron alloy powder is added and smelted to obtain alloy melt. (2) The alloy solution is cast, forged and heat-treated to obtain 20SiMn2MoV steel.

[0006] Preferably, the preparation steps of the porous zirconium oxide-coated zirconium-iron alloy powder are as follows: 1-Octyl-3-methylimidazolium bromide ionic liquid, 1-hexadecyl-3-methylimidazolium bromide ionic liquid, distilled water, zirconium oxychloride octahydrate, sodium hydroxide powder, and zirconium iron alloy powder were mixed and stirred evenly, and then subjected to hydrothermal treatment. The resulting product was purified and calcined to obtain porous zirconium oxide-coated zirconium iron alloy powder. Preferably, the ratio of the amounts of 1-octyl-3-methylimidazolium bromide ionic liquid, 1-hexadecyl-3-methylimidazolium bromide ionic liquid, distilled water, zirconium oxychloride octahydrate, sodium hydroxide powder, and zirconium-iron alloy powder is 1-1.5g:0.5-1g:75-100ml:0.3-0.4g:0.15-0.2g:0.5-2g.

[0007] Preferably, the zirconium-iron alloy powder has a purity of 99.95%, a powder size of 325 mesh, and an alloy ratio of 70-80:20-30.

[0008] Preferably, the hydrothermal treatment temperature is 80-85℃ and the hydrothermal treatment time is 4-5 hours.

[0009] Preferably, the purification involves washing with ethanol and water.

[0010] Preferably, the calcination temperature is 500-550℃ and the calcination time is 3-5h.

[0011] Preferably, the melting temperature is 1560-1650℃.

[0012] Preferably, the pouring temperature is 1530-1600℃.

[0013] Preferably, the forging process involves first heating to 1200℃ for initial forging, upsetting to φ300mm, and then performing final forging at 900℃ to elongate to φ150mm.

[0014] Preferably, the heat treatment process is as follows: normalizing at 930℃±10℃ and air cooling; quenching at 910℃±10℃ and water cooling; tempering at 220℃±10℃ and air cooling.

[0015] The beneficial effects of this invention are: This invention adds trace amounts of zirconium during the preparation of 20SiMn2MoV, thereby strengthening the alloy steel through Zr solid solution, optimizing dislocation movement, purifying grain boundaries, and reducing the segregation of impurities such as P and S, resulting in high yield strength and tensile strength, good plastic deformation capacity, and low-temperature toughness.

[0016] This invention employs a process of coating zirconium-iron alloy powder with porous zirconium oxide. The porous structure of zirconium oxide acts as a protective layer, effectively preventing the oxidation loss of zirconium during high-temperature smelting and ensuring the effective utilization rate of zirconium. At the same time, the coating structure may control the release rate of zirconium, enabling it to achieve a more uniform distribution in the molten steel, thus significantly improving the overall performance of the alloy steel.

[0017] This invention utilizes a unique dual-ionic liquid template technology to construct a gradient-distributed pore structure, enabling the controlled release of zirconium. The synergistic effect of pores of different sizes avoids losses caused by premature zirconium release while ensuring continuous alloying. This spatiotemporally controllable release characteristic results in a more uniform distribution of zirconium in the molten steel, effectively preventing localized agglomeration.

[0018] This invention achieves a synergistic improvement in the strength, plasticity, and low-temperature impact toughness of 20SiMn2MoV steel through innovative material design and process optimization, providing a new technical approach for the development of high-performance steel. Moreover, the technical solution is simple and easy to implement for industrial production. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0020] The zirconium-iron alloy powder used in this invention has a purity of 99.95%, a powder size of 325 mesh, and an alloy ratio of 70:30.

[0021] Preparation Example 1: The specific preparation steps of porous zirconium oxide-coated zirconium iron alloy powder are as follows: 1 g of 1-octyl-3-methylimidazolium bromide ionic liquid and 0.5 g of 1-hexadecyl-3-methylimidazolium bromide ionic liquid were dissolved in 75 ml of distilled water, and the solution was placed in an autoclave. Then, 0.3 g of zirconium oxychloride octahydrate, 0.15 g of sodium hydroxide powder, and 0.5 g of zirconium-iron alloy powder were added to the mixture. After stirring evenly, the mixture was transferred to a reaction vessel and kept at 80 °C for 4 h. After the reaction was completed, the mixture was cooled to room temperature, the precipitate was collected, and washed four times with ethanol and water. Finally, the mixture was calcined at 500 °C for 3 h to obtain porous zirconium oxide-coated zirconium-iron alloy powder.

[0022] Preparation Example 2: The specific preparation steps of porous zirconia-coated zirconium iron alloy powder are as follows: 1.3 g of 1-octyl-3-methylimidazolium bromide ionic liquid and 0.8 g of 1-hexadecyl-3-methylimidazolium bromide ionic liquid were dissolved in 90 ml of distilled water, and the solution was placed in an autoclave. Then, 0.35 g of zirconium oxychloride octahydrate, 0.18 g of sodium hydroxide powder, and 1.5 g of zirconium-iron alloy powder were added to the mixture. After stirring evenly, the mixture was transferred to a reaction vessel and kept at 83 °C for 5 h. After the reaction was completed, the mixture was cooled to room temperature, the precipitate was collected, and washed four times with ethanol and water. Finally, the mixture was calcined at 530 °C for 4 h to obtain porous zirconium oxide-coated zirconium-iron alloy powder.

[0023] Preparation Example 3: The specific preparation steps of porous zirconia-coated zirconium iron alloy powder are as follows: 1.5 g of 1-octyl-3-methylimidazolium bromide ionic liquid and 1 g of 1-hexadecyl-3-methylimidazolium bromide ionic liquid were dissolved in 100 ml of distilled water, and the solution was placed in an autoclave. Then, 0.4 g of zirconium oxychloride octahydrate, 0.2 g of sodium hydroxide powder, and 2 g of zirconium-iron alloy powder were added to the mixture. After stirring evenly, the mixture was transferred to a reaction vessel and kept at 85 °C for 5 h. After the reaction was completed, the mixture was cooled to room temperature, the precipitate was collected, and washed four times with ethanol and water. Finally, the mixture was calcined at 550 °C for 5 h to obtain porous zirconium oxide-coated zirconium-iron alloy powder.

[0024] Example 1: A method for improving the plasticity and low-temperature impact properties of 20SiMn2MoV steel by adding zirconium, the specific steps of which are as follows: (1) The components were prepared according to the following weight percentages: C: 0.17%, Si: 0.95%, Mn: 2.25%, Mo: 0.30%, V: 0.05%, Zr: 0.025%, P: 0.010%, S: 0.010%, with the balance being Fe and impurities, totaling 1000 kg. The surface oxide scale of each component was removed. Then, the components were mixed and heated to melt at a melting temperature of 1560°C for 40 min. The porous zirconium oxide-coated zirconium-iron alloy powder of Preparation Example 1 was then added, and the melting was continued for 1 h to obtain the alloy melt. (2) Preheat the mold to 270°C, pour the alloy melt into the mold at 1530°C, cool to room temperature, then heat to 1200°C for initial forging, upsetting to φ300mm, then for final forging at 900°C to complete the drawing to φ150mm to obtain the rough product; (3) The crude product was subjected to normalizing treatment at 940℃, air-cooled to room temperature, quenched at 920℃, water-cooled to room temperature, tempered at 210℃, and air-cooled to room temperature to obtain 20SiMn2MoV steel.

[0025] Example 2: A method for improving the plasticity and low-temperature impact properties of 20SiMn2MoV steel by adding zirconium, the specific steps of which are as follows: (1) The components were prepared according to the following weight percentages: C: 0.20%, Si: 1.05%, Mn: 2.35%, Mo: 0.40%, V: 0.09%, Zr: 0.030%, P: 0.015%, S: 0.015%, with the remainder being Fe and impurities, totaling 1000 kg. The surface oxide scale of each component was removed. The components were then mixed and heated to melt at a melting temperature of 1600°C for 50 min. The porous zirconium oxide-coated zirconium-iron alloy powder of Preparation Example 2 was then added, and the melting was continued for 1 h to obtain the alloy melt. (2) Preheat the mold to 275°C, pour the alloy melt into the mold at 1570°C, cool to room temperature, then heat to 1200°C for initial forging, upsetting to φ300mm, then for final forging at 900°C to complete the drawing to φ150mm to obtain the rough product; (3) The crude product was subjected to normalizing treatment at 930℃, air-cooled to room temperature, quenched at 910℃, water-cooled to room temperature, tempered at 220℃, and air-cooled to room temperature to obtain 20SiMn2MoV steel.

[0026] Example 3: A method for improving the plasticity and low-temperature impact properties of 20SiMn2MoV steel by adding zirconium, the specific steps of which are as follows: (1) The components were prepared according to the following weight percentages: C: 0.23%, Si: 1.15%, Mn: 2.55%, Mo: 0.50%, V: 0.12%, Zr: 0.035%, P: 0.020%, S: 0.020%, with the balance being Fe and impurities, totaling 1000 kg. The surface oxide scale of each component was removed. Then, the components were mixed and heated to melt at a melting temperature of 1650°C for 60 min. The porous zirconium oxide-coated zirconium-iron alloy powder of Preparation Example 3 was then added, and the melting was continued for 1 h to obtain the alloy melt. (2) Preheat the mold to 280°C, pour the alloy melt into the mold at 1600°C, cool to room temperature, then heat to 1200°C for initial forging, upsetting to φ300mm, then for final forging at 900°C to complete the drawing to φ150mm to obtain the rough product; (3) The crude product was subjected to normalizing treatment at 920℃, air-cooled to room temperature, quenched at 900℃, water-cooled to room temperature, tempered at 230℃, and air-cooled to room temperature to obtain 20SiMn2MoV steel.

[0027] Comparative Example 1: The difference from Example 2 is that porous zirconium oxide-coated ferrozirconium alloy powder is not added. The steps are the same as in Example 2, and the specific steps are as follows: (1) The components are mixed according to the following weight percentages: C: 0.20%, Si: 1.05%, Mn: 2.35%, Mo: 0.40%, V: 0.09%, P: 0.015%, S: 0.015%, with the balance being Fe and impurities, totaling 1000 kg. The surface oxide scale of the above components is removed. Then, the components are mixed and heated to melt. The melting temperature is 1600℃ and the melting time is 50 min to obtain the alloy melt. (2) Preheat the mold to 275°C, pour the alloy melt into the mold at 1570°C, cool to room temperature, then heat to 1200°C for initial forging, upsetting to φ300mm, then for final forging at 900°C to complete the drawing to φ150mm to obtain the rough product; (3) The crude product was subjected to normalizing treatment at 930℃, air-cooled to room temperature, quenched at 910℃, water-cooled to room temperature, tempered at 220℃, and air-cooled to room temperature to obtain 20SiMn2MoV steel.

[0028] Comparative Example 2: The difference from Example 2 is that zirconium-iron alloy powder was directly added. The steps are the same as in Example 2, and the specific steps are as follows: (1) The components are mixed according to the following weight percentages: C: 0.20%, Si: 1.05%, Mn: 2.35%, Mo: 0.40%, V: 0.09%, Zr: 0.030%, P: 0.015%, S: 0.015%, with the balance being Fe and impurities, totaling 1000 kg. The surface oxide scale of the above components is removed. Then, the components are mixed and heated to melt at a melting temperature of 1600℃ for 50 min. Zirconium iron alloy powder is then added and the melting continues for 1 h to obtain the alloy melt. (2) Preheat the mold to 275°C, pour the alloy melt into the mold at 1570°C, cool to room temperature, then heat to 1200°C for initial forging, upsetting to φ300mm, then for final forging at 900°C to complete the drawing to φ150mm to obtain the rough product; (3) The crude product was subjected to normalizing treatment at 930℃, air-cooled to room temperature, quenched at 910℃, water-cooled to room temperature, tempered at 220℃, and air-cooled to room temperature to obtain 20SiMn2MoV steel.

[0029] Comparative Example 3: The difference from Example 2 is that 1-hexadecyl-3-methylimidazolium bromide ionic liquid is not added. The steps are the same as in Example 2, and the specific steps are as follows: 1.3 g of 1-octyl-3-methylimidazolium bromide ion liquid was dissolved in 90 ml of distilled water, and the solution was placed in an autoclave. Then, 0.35 g of zirconium oxychloride octahydrate, 0.18 g of sodium hydroxide powder, and 1.5 g of zirconium iron alloy powder were added to the mixture. After stirring evenly, the mixture was transferred to a reaction vessel and kept at 83 °C for 5 h. After the reaction was completed, the mixture was cooled to room temperature, the precipitate was collected and washed four times with ethanol and water, and finally calcined at 530 °C for 4 h to obtain porous zirconium oxide-coated zirconium iron alloy powder. (1) The components are mixed according to the following weight percentages: C: 0.20%, Si: 1.05%, Mn: 2.35%, Mo: 0.40%, V: 0.09%, Zr: 0.030%, P: 0.015%, S: 0.015%, with the balance being Fe and impurities, totaling 1000 kg. The surface oxide scale of each component is removed. Then, the components are mixed and heated to melt at a melting temperature of 1600℃ for 50 min. Then, porous zirconium oxide-coated zirconium-iron alloy powder is added, and melting is continued for 1 h to obtain alloy melt. (2) Preheat the mold to 275°C, pour the alloy melt into the mold at 1570°C, cool to room temperature, then heat to 1200°C for initial forging, upsetting to φ300mm, then for final forging at 900°C to complete the drawing to φ150mm to obtain the rough product; (3) The crude product was subjected to normalizing treatment at 930℃, air-cooled to room temperature, quenched at 910℃, water-cooled to room temperature, tempered at 220℃, and air-cooled to room temperature to obtain 20SiMn2MoV steel.

[0030] Comparative Example 4: The difference from Example 2 is that 1-octyl-3-methylimidazolium bromide ionic liquid is not added. The steps are the same as in Example 2, and the specific steps are as follows: 0.8 g of 1-hexadecyl-3-methylimidazolium bromide ion liquid was dissolved in 90 ml of distilled water, and the solution was placed in an autoclave. Then, 0.35 g of zirconium oxychloride octahydrate, 0.18 g of sodium hydroxide powder, and 1.5 g of zirconium iron alloy powder were added to the mixture. After stirring evenly, the mixture was transferred to a reaction vessel and kept at 83 °C for 5 h. After the reaction was completed, the mixture was cooled to room temperature, the precipitate was collected and washed four times with ethanol and water, and finally calcined at 530 °C for 4 h to obtain porous zirconium oxide-coated zirconium iron alloy powder. (1) The components are mixed according to the following weight percentages: C: 0.20%, Si: 1.05%, Mn: 2.35%, Mo: 0.40%, V: 0.09%, Zr: 0.030%, P: 0.015%, S: 0.015%, with the balance being Fe and impurities, totaling 1000 kg. The surface oxide scale of each component is removed. Then, the components are mixed and heated to melt at a melting temperature of 1600℃ for 50 min. Then, porous zirconium oxide-coated zirconium-iron alloy powder is added, and melting is continued for 1 h to obtain alloy melt. (2) Preheat the mold to 275°C, pour the alloy melt into the mold at 1570°C, cool to room temperature, then heat to 1200°C for initial forging, upsetting to φ300mm, then for final forging at 900°C to complete the drawing to φ150mm to obtain the rough product; (3) The crude product was subjected to normalizing treatment at 930℃, air-cooled to room temperature, quenched at 910℃, water-cooled to room temperature, tempered at 220℃, and air-cooled to room temperature to obtain 20SiMn2MoV steel.

[0031] Performance testing Tensile property testing: Tests were conducted according to GB / T 228.1-2021 "Metallic materials, tensile testing—Part 1: Tests at room temperature." Standard circular tensile specimens were cut axially from φ150mm forged bars of the steel used in the examples and comparative examples. The gauge length was 5mm, the parallel section length was 25mm, and the total length was 200mm. The surfaces were ensured to be free of scratches. A universal testing machine was used, with a loading rate of 2 mm / min until the yield stage, then adjusted to 5 mm / min until fracture. The yield strength, tensile strength, elongation, and reduction of area were recorded. The test results are shown in Table 1. Low-temperature impact test: According to GB / T 229-2020 "Charpy impact test method for metallic materials", the test was carried out using standard V-notch specimens (55×10×10mm, notch depth 2mm). The specimens were placed in an alcohol-liquid nitrogen mixed bath and cooled to -20℃±1℃ and -45℃±1℃ respectively. The temperature was kept for 15min to ensure uniform temperature. A 150J pendulum impact tester was used to release the pendulum to impact the specimens. Six specimens were tested at each temperature group. The test results are shown in Table 1.

[0032]

[0033] Data Analysis: As can be seen from the data in Examples 1-3 of Table 1, the 20SiMn2MoV steel prepared by this invention exhibits excellent comprehensive mechanical properties. Its high yield strength and tensile strength indicate that the material has excellent load-bearing capacity. Meanwhile, the significant increase in elongation and reduction of area reveals the material's good plastic deformation capacity, mainly attributed to the solid solution strengthening of Zr and the optimization of dislocation movement. Particularly noteworthy is the excellent low-temperature impact toughness, which is due to the ability of Zr to purify grain boundaries, reduce the segregation of impurities such as P and S, and the porous structure of zirconium oxide promoting the uniform diffusion of zirconium through nanoscale pores, thereby forming a fine dispersed zirconium compound phase in the steel matrix. These dispersed phases, on the one hand, impede dislocation movement by pinning grain boundaries, thus improving strength; on the other hand, they significantly improve plasticity and low-temperature toughness by refining grain size and purifying grain boundary impurities.

[0034] As can be seen from the data comparison of Example 2 and Comparative Examples 1 and 2 in Table 1, the process of coating zirconium-iron alloy powder with porous zirconium oxide significantly improves the overall performance of the material. In terms of mechanical properties, Example 2 exhibits higher strength and better plasticity, while its low-temperature impact performance is significantly improved. This performance improvement is mainly due to the porous zirconium oxide coating structure. Firstly, the porous structure of zirconium oxide acts as a protective layer, effectively preventing the oxidation loss of zirconium during high-temperature melting and ensuring the effective utilization rate of zirconium. Secondly, this coating structure may control the release rate of zirconium, allowing it to achieve a more uniform distribution in the molten steel, thereby promoting the formation of fine and dispersed zirconium compound phases. These dispersed phases enhance the material strength through grain boundary pinning and dislocation strengthening mechanisms, and improve plasticity and toughness by refining grain size and purifying grain boundaries.

[0035] The performance data comparison analysis of Example 2 and Comparative Examples 3 and 4 shows that the porous zirconia coating structure constructed by the synergistic use of two ionic liquids (1-octyl-3-methylimidazolium bromide and 1-hexadecyl-3-methylimidazolium bromide) exhibits superior comprehensive performance compared to the single ionic liquid system. This performance difference may stem from the synergistic regulation mechanism of different chain length ionic liquids on the pore structure of zirconia: short-chain ionic liquids (1-octyl-3-methylimidazolium bromide) tend to form smaller mesoporous structures, while long-chain ionic liquids (1-hexadecyl-3-methylimidazolium bromide) help to construct larger-diameter mesoporous channels. This hierarchical pore structure provides a more optimized slow-release pathway for zirconium. The micropores formed by the short-chain ionic liquid protect zirconium from premature release, while the mesopores constructed by the long-chain ionic liquid ensure a continuous supply of zirconium during subsequent melting. Secondly, the synergistic effect of the two ionic liquids may promote the formation of a more uniform three-dimensional network structure in the zirconia coating. This structure ensures both the mechanical stability of the coating and maintains good gas permeability, thereby obtaining a more complete zirconia crystal structure during calcination. The pore size gradient distribution caused by the difference in ionic liquid chain lengths achieves more controllable zirconium transport efficiency during melting.

[0036] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

Claims

1. A method for improving the plasticity and low-temperature impact toughness of 20SiMn2MoV steel by adding zirconium, characterized in that, Includes the following steps: (1) The components C, Si, Mn, Mo, V, P, S, Zr and Fe are mixed according to the set weight percentage, smelted, and then porous zirconium oxide coated zirconium iron alloy powder is added and smelted to obtain alloy melt. (2) The alloy solution is cast, forged, and heat-treated to obtain 20SiMn2MoV steel; The preparation steps of the porous zirconium oxide-coated zirconium iron alloy powder are as follows: 1-Octyl-3-methylimidazolium bromide ionic liquid, 1-hexadecyl-3-methylimidazolium bromide ionic liquid, distilled water, zirconium oxychloride octahydrate, sodium hydroxide powder, and zirconium-iron alloy powder were mixed and stirred evenly, and then subjected to hydrothermal treatment. The resulting product was purified and calcined to obtain porous zirconium oxide-coated zirconium-iron alloy powder.

2. The method according to claim 1, characterized in that, The ratio of the following components to be used is 1-octyl-3-methylimidazolium bromide ionic liquid, 1-hexadecyl-3-methylimidazolium bromide ionic liquid, distilled water, zirconium oxychloride octahydrate, sodium hydroxide powder, and zirconium-iron alloy powder: 1-1.5g:0.5-1g:75-100ml:0.3-0.4g:0.15-0.2g:0.5-2g.

3. The method according to claim 1, characterized in that, The zirconium-iron alloy powder has a purity of 99.95%, a powder size of 325 mesh, and an alloy ratio of 70-80:20-30.

4. The method according to claim 1, characterized in that, The calcination temperature is 500-550℃, and the calcination time is 3-5h.

5. The method according to claim 1, characterized in that, The melting temperature is 1560-1650℃.

6. The method according to claim 1, characterized in that, The pouring temperature is 1530-1600℃.

7. The method according to claim 1, characterized in that, The specific forging process involves first heating to 1200℃ for initial forging, upsetting to φ300mm, and then performing final forging at 900℃ to elongate to φ150mm.

8. The method according to claim 1, characterized in that, The heat treatment process is as follows: normalizing at 930℃±10℃ and air cooling; quenching at 910℃±10℃ and water cooling; tempering at 220℃±10℃ and air cooling.

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