Heat Treatment of Metals ›› 2023, Vol. 48 ›› Issue (6): 85-88.DOI: 10.13251/j.issn.0254-6051.2023.06.015

• Process Research • Previous Articles     Next Articles

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

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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