金属热处理 ›› 2023, Vol. 48 ›› Issue (6): 85-88.DOI: 10.13251/j.issn.0254-6051.2023.06.015

• 工艺研究 • 上一篇    下一篇

热处理工艺对17-4PH不锈钢组织和力学性能的影响

王旭明1,2, 何文武3, 魏海东1,2, 常鑫1,2   

  1. 1.兰州兰石集团有限公司 铸锻分公司, 甘肃 兰州 730300;
    2.甘肃省高端铸锻件工程技术研究中心, 甘肃 兰州 730300;
    3.太原科技大学 材料科学与工程学院, 山西 太原 030024
  • 收稿日期:2022-12-20 修回日期:2023-05-06 发布日期:2023-08-11
  • 作者简介:王旭明(1991—),男,工程师,主要研究方向为金属材料热加工工艺,E-mail:wxm0720@163.com

Effect of heat treatment process on microstructure and mechanical properties of 17-4PH stainless steel

Wang Xuming1,2, He Wenwu3, Wei Haidong1,2, Chang Xin1,2   

  1. 1. Casting and Forging Branch, Lanzhou LS Group Co., Ltd., Lanzhou Gansu 730300, China;
    2. High-End Casting and Forging Engineering Technology Research Center in Gansu Province, Lanzhou Gansu 730300, China;
    3. College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan Shanxi 030024, China
  • Received:2022-12-20 Revised:2023-05-06 Published:2023-08-11

摘要: 为研究17-4PH不锈钢的组织与性能, 设计并实施热处理工艺方案, 采用膨胀试验、金相观察、力学性能、硬度和冲击检测等方法, 研究中间调整处理、固溶和时效温度对17-4PH钢组织、力学性能的影响。结果表明, 中间调整处理可细化马氏体组织, 碳化物颗粒在马氏体和奥氏体内析出, 有较稳定的逆转变奥氏体形成。固溶温度提高, 强度提升不明显;进行中间调整处理后, 随时效温度提高, 逆转变奥氏体组织含量增加, 冲击性能提高, 但强度明显降低。

关键词: 17-4PH不锈钢, 中间调整处理, 时效, 微观组织, 力学性能

Abstract: In order to study structure and properties of 17-4PH stainless steel, a heat treatment process plan was designed and conducted, and then the effects of intermediate adjustment treatment, solution treatment and aging temperature on microstructure and mechanical properties of the 17-4PH steel were studied by means of thermal dilatometric test, metallographic observation, and tests of mechanical properties, hardness and impact property. The results show that the intermediate adjustment treatment can refine the martensite structure, the carbide particles are precipitated in the martensite and austenite, and there is a relatively stable reverse transformation austenite formation. When the solution treatment temperature increases, the increase of strength is not obvious. After the intermediate adjustment treatment, when the aging temperature increases, the content of the reverse transformed austenite structure increases, the impact property increases, but the strength decreases significantly.

Key words: 17-4PH stainless steel, intermediate adjustment treatment, aging, microstructure, mechanical properties

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