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Optimization for heat treatment method for 1Cr15Ni36W3Ti alloy bar for nuclear power

A heat treatment method and alloy bar technology are applied in the field of rolling bar manufacturing and 1Cr15Ni36W3Ti alloy forgings for nuclear power, which can solve the problems of inability to obtain technical materials, technical confidentiality, no production process and reference documents, etc. The effect of high temperature performance

Inactive Publication Date: 2018-08-10
FUSHUN SPECIAL STEEL SHARES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main difficulty in alloy production: 1Cr15Ni36W3Ti alloy has been produced in Russia as a nuclear power material, but due to technical confidentiality, relevant technical materials cannot be obtained
Therefore, this alloy is produced domestically for the first time as a nuclear power material, and there are no production processes and references that can be used for reference.

Method used

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  • Optimization for heat treatment method for 1Cr15Ni36W3Ti alloy bar for nuclear power
  • Optimization for heat treatment method for 1Cr15Ni36W3Ti alloy bar for nuclear power
  • Optimization for heat treatment method for 1Cr15Ni36W3Ti alloy bar for nuclear power

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Experimental program
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Effect test

Embodiment 1

[0030] Rolled bar finished product specification: φ50mm

[0031] The alloy was smelted into ingots by non-vacuum induction furnace + electroslag remelting. The chemical composition is shown in Table 2.

[0032] Table 2

[0033]

[0034] The steel ingot is billeted to a 210mm octagonal billet by a 3150t fast forging machine. The heating temperature of the first fire for billet opening is 1060°C, and the heating temperature of the second fire is 1020°C. The temperature is 800°C; the heating temperature of 1800t precision forging billet opening is 1020°C, the total deformation is 30%, the surface is good, and the final forging temperature of precision forging is 850°C.

[0035] After the billet is polished, the surface is guaranteed to be free of defects, and it is used for rolling. The heating temperature of the first rolling fire is 1040°C, and the heating temperature of the second fire is 1020°C. During the heating process, the billet temperature is uniform, and the final...

Embodiment 2

[0045] Forged bar finished product specification: φ140mm

[0046] The alloy was smelted into ingots by non-vacuum induction furnace + electroslag remelting. The chemical composition is shown in Table 5.

[0047] table 5

[0048]

[0049] The steel ingot is billeted to a 210mm octagonal billet by a 3150t fast forging machine. The heating temperature of the first fire for billet opening is 1060°C, and the heating temperature of the second fire is 1020°C. The temperature is 820°C; the heating temperature of 1800t precision forging billet opening is 1030°C, the total deformation is 50%, the surface is good, and the final forging temperature of precision forging is 830°C.

[0050] After forging, the bar is subjected to finished product heat treatment, water-cooled at 1090°C for 3030 minutes, and air-cooled after aging at 700°C for 50 hours.

[0051] After heat treatment, the finished bar is finished, inspected, and packaged after passing the surface inspection.

[0052] The t...

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Abstract

The invention discloses optimization for a heat treatment method for a 1Cr15Ni36W3Ti alloy bar for nuclear power, and aims at further improving the strength value of an alloy at the room temperature and the high temperature through optimization of an alloy finished product heat treatment method. According to the technical scheme, the direct aging heat treatment technology is adopted, and air cooling is conducted after heat preservation is conducted for 50 h within the range of 700 DEG C+ / -10 DEG C. The gamma' content in the alloy obtained through the optimized heat treatment technology is obviously increased, grains are fine and uniform, and the strength of the alloy at the room temperature and the high temperature can be obviously improved; and meanwhile, the plasticity of the alloy is not reduced, the allowance of the mechanical performance of the 1Cr15Ni36W3Ti alloy is improved, and stability of the alloy in the service process is further guaranteed. The optimization has the beneficial effects that the tensile strength of the alloy at the room temperature and the high temperature is obviously improved, and meanwhile the tensile plasticity of the product is not obviously reduced.

Description

technical field [0001] The invention belongs to the field of metal material manufacturing, and in particular relates to a method for manufacturing 1Cr15Ni36W3Ti alloy forgings and rolled bars for nuclear power. Background technique [0002] This alloy is an iron-nickel-based heat-strength alloy, and the original Russian designation is З612, ХН35ВТ. The alloy is a single austenite structure, which is solid-solution strengthened by chromium and tungsten elements. The higher content of manganese in the alloy plays an anti-oxidation effect, and the appropriate content of titanium element is conducive to the formation of γ′ phase, which is beneficial to improve the quality of the alloy. room temperature and high temperature strength. Due to the good thermal strength of the alloy, the durability at a temperature of 650°C can reach 50,000 hours to 100,000 hours. It is mainly used for gas turbine blades, discs, rotors and connecting parts. In addition, due to its good high tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/02C22B9/18C21D8/06
CPCC21D8/065C22B9/18C22C1/02C22C30/00C22C33/04C22C38/02C22C38/04C22C38/44C22C38/50C22C38/58
Inventor 王洋洋杨玉军张玉春王志刚王海江白宪超刘忠平边松涛张鹏李宁闫森于杰刘猛候智鹏李成龙李飞扬王明
Owner FUSHUN SPECIAL STEEL SHARES
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