Effect of intermediate adjustment treatment on microstructure and properties of 17-4PH stainless steel

doi:10.13251/j.issn.0254-6051.2020.09.018

Abstract

Abstract: Based on the traditional solid solution treatment+aging process,the 17-4PH stainless steel used for oil valve block was treated by solid solution treatment+intermediate adjustment+aging process.The microstructure and mechanical properties of the specimens were analyzed by using optical microscope,scanning electron microscope,XRD and mechanical property test,and the effect of intermediate treatment on the microstructure and mechanical properties was studied.The results show that with the increase of solid solution treatment temperature,the carbon and alloy elements dissolved in the matrix increase,the microstructure composition is more uniform,and the hardness of the material is higher under the same aging conditions.After adding the intermediate adjustment treatment and then aging,the content of reverse transformed austenite is significantly increased,and the plasticity and impact properties of the material are significantly increased,but the strength is reduced.

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

CLC Number:

TG156

Liu Kaixuan, Xue Song, Wang Peng, Gao Zhigang, Zhao Xiuming, He Xiancong. Effect of intermediate adjustment treatment on microstructure and properties of 17-4PH stainless steel[J]. Heat Treatment of Metals, 2020, 45(9): 99-104.

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