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Forging and heat treatment method for improving mechanical property of Cr17Ni2 stainless steel forged piece

A heat treatment method and a technology of mechanical properties, which are applied in the field of forging and heat treatment to improve the mechanical properties of Cr17Ni2 stainless steel forgings, and can solve problems such as difficulty in obtaining comprehensive properties and poor material toughness

Inactive Publication Date: 2018-03-27
GUIZHOU ANDA AVIATION FORGING
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the product has high strength requirements, it is difficult to obtain better comprehensive performance due to the poor toughness of the material

Method used

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Comparison scheme
Effect test

specific Embodiment approach

[0010] Cr17Ni2 stainless steel is forged at a temperature of 1150 ° C, the deformation is 30% to 50%, and the final forging temperature is ≥ 900 ° C; after forging, the Cr17Ni2 stainless steel forging is placed in a heating furnace and cooled with the furnace;

[0011] Heat Cr17Ni2 stainless steel forgings to 1020°C for 1 hour, oil cooling, oil temperature ≥ 50°C; take out Cr17Ni2 stainless steel forgings and air cool to room temperature; then reheat Cr17Ni2 stainless steel forgings to 520°C for 2 hours, water cool to room temperature, take out to obtain Cr17Ni2 stainless steel forgings with good mechanical properties.

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Abstract

The invention discloses a forging and heat treatment method for improving a mechanical property of a Cr17Ni2 stainless steel forged piece. The forging and heat treatment method comprises the steps that firstly forging forming is conducted on Cr17Ni2 stainless steel at the temperature of 1150 DEG C, the deformation is 30%-50%, and the finish forging temperature is higher than or equal to 900 DEG C;after forging is conducted, the Cr17Ni2 stainless steel forged piece is placed into a heating furnace, and furnace cooling is conducted; then the Cr17Ni2 stainless steel forged piece is heated to be1020 DEG C, heat preservation is conducted for one hour, oil cooling is conducted, and the oil temperature is higher than or equal to 50 DEG C; the Cr17Ni2 stainless steel forged piece is taken out and air-cooled to be the room temperature; and the Cr17Ni2 stainless steel forged piece is heated to be 520 DEG C again, heat preservation is conducted for two hours, the Cr17Ni2 stainless steel forgedpiece is subjected to water cooling to be the room temperature, and the Cr17Ni2 stainless steel forged piece with the good mechanical property is taken out and obtained. According to the forging and heat treatment method, residual austenite structures of the Cr17Ni2 stainless steel forged piece can be completely removed, the performance of the forged piece is improved, and the forging and heat treatment method is used for the Cr17Ni2 stainless steel forged piece.

Description

technical field [0001] The invention relates to a forging and heat treatment method, in particular to a forging and heat treatment method for improving the mechanical properties of a Cr17Ni2 stainless steel forging. Background technique [0002] Cr17Ni2 steel is a high-strength stainless steel, which is characterized by the high strength of martensitic stainless steel while retaining the corrosion resistance of ferritic stainless steel. The steel is sensitive to the hot working process, and the generation of delta ferrite and retained austenite during the hot working process has a great influence on the room temperature performance. When the product has high strength requirements, it is difficult to obtain better comprehensive performance due to the poor toughness of the material. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a forging and heat treatment process to obtain a Cr17Ni2 stainless steel forging and ...

Claims

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Application Information

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IPC IPC(8): C21D1/18C21D6/00C21D8/00
CPCC21D1/18C21D6/004C21D8/005
Inventor 刘成陈祖祥陈再鼎杨亚平杨孝荣陈红芳
Owner GUIZHOU ANDA AVIATION FORGING
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