A kind of 022cr19ni10 stainless steel flange for nuclear power plant and its manufacturing method

A manufacturing method and stainless steel technology, applied in the field of stainless steel forging, can solve problems such as coarse grains, achieve small grain size, excellent microstructure, and prevent grain growth.

Active Publication Date: 2022-04-29
无锡市法兰锻造有限公司
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Problems solved by technology

If the high temperature heat preservation stage

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  • A kind of 022cr19ni10 stainless steel flange for nuclear power plant and its manufacturing method

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[0031] Example

[0032] The chemical composition of stainless steel forgings is: C: 0.019%, Si: 0.43%, Mn: 1.72%, P: 0.013%, S: 0.001%, Cr: 19.26%, Ni: 10.65%, Cu: 0.8%, B: 0.001 %, and the rest is iron.

[0033] The stainless steel forging is produced by the manufacturing method of the present invention: the raw material is refined into a stainless steel ingot containing the chemical composition in this example by using an AOD furnace. The obtained stainless steel ingots are made into stainless steel forgings with a hydraulic press. The forging is formed after 3 times of heat. The forging ratios of the 3 times of heat are 2, 2, and 1. The heating temperatures of the 3 times of heat are 1200 °C, 1180 °C, and 1180 °C, respectively. The riser end of the stainless steel ingot is removed by 18%, and the nozzle end of the stainless steel ingot is removed by 7%. The forged stainless steel forgings are heated to 1100°C and kept for 3 hours, and the water is cooled by rapid circula...

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Abstract

The invention discloses a 022Cr19Ni10 stainless steel flange for nuclear power plants, which contains the following chemical components: C≤0.03%, Si≤1%, Mn≤2%, P≤0.03%, S≤0.015%, 18.5%≤Cr≤19.5% , 9%≤Ni≤11.5%, Cu≤1%, B≤0.001%, and the rest is iron. A manufacturing method is also disclosed, including the following steps: raw material refining: refining the raw material into a stainless steel ingot containing the above chemical composition; forging: forging the obtained stainless steel ingot into a stainless steel flange with a hydraulic press or an air hammer; heat treatment: heating to 1050 ℃ ~ 1120 ℃ and heat preservation, and then water cooling. Inspection: physical and chemical inspection and non-destructive inspection of stainless steel forgings after heat treatment. Through the above method, the present invention controls the purity of the material, increases the corrosion resistance and strength of the material, and effectively improves the mechanical properties of the material. In terms of manufacturing methods, avoid adverse effects on the performance of forgings; ensure that forgings have excellent microstructure through solid solution treatment, and prevent the growth of austenite grains in forgings.

Description

technical field [0001] The invention relates to the technical field of stainless steel forging, in particular to a 022Cr19Ni10 stainless steel flange for nuclear power plants and a manufacturing method thereof. Background technique [0002] Stainless steel is a kind of lightness close to the mirror surface, with excellent corrosion resistance, compatibility, toughness and other series characteristics. It is used in heavy / light industry, daily necessities industry and architectural decoration and other industries. [0003] Hualong One is the third-generation nuclear power technology independently developed by my country. The performance and applicable standards of flanges and forgings used in nuclear power plants are different from those of foreign nuclear power technologies. type, the future development space is broad. A large number of flanges and forgings made of 022Cr19Ni10 are used in Hualong No. 1 nuclear power units. The materials, manufacturing, inspection and accepta...

Claims

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Application Information

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IPC IPC(8): C22C38/42C22C38/54C22C38/58C22C38/02C22C38/04B21J5/00C21D8/00
CPCC22C38/42C22C38/54C22C38/58C22C38/04C22C38/02C21D8/005B21J5/002C21D2211/001C21D2211/005
Inventor 李刚亮邓冬石宏亮吴金波邹琪袁超
Owner 无锡市法兰锻造有限公司
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