时效温度对17-4PH钢微观组织及力学性能的影响  

Effect of aging temperature on microstructure and mechanical properties of 17-4PH steel

作　　者：王佳旭 李丽 冀宣名 WANG Jiaxu;LI Li;JI Xuanming

机构地区：[1]中国航发中传机械有限公司,湖南长沙410200 [2]贵州大学材料与冶金学院,贵州贵阳550000

出　　处：《现代机械》2024年第2期98-102,共5页Modern Machinery

基　　金：贵州省科技支撑计划(2022-050)。

摘　　要：采用光学显微镜(OM)、扫描电镜(SEM)、电子万能试验机等方法研究了不同热处理工艺对17-4PH马氏体不锈钢组织和力学性能的影响规律。实验结果表明:热处理后基体中的析出相对时效温度变化比较敏感,尺寸随时效温度升高而增大。固溶+时效处理的试样与原始样相比其硬度和抗拉强度显著提升,而塑性无明显变化。此外,1040℃固溶+470℃时效后的试样综合力学性能最好。In this paper,the effect of different heat treatment processes on the microstructure and mechanical properties of 17-4PH martensitic stainless steel is studied by optical microscope(OM),scanning electron microscope(SEM)and universal testing machine.The results show that the precipitated phase in the matrix is sensitive to the change of aging temperature after heat treatment,and the size increases with the aging temperature.Compared with the original sample,the hardness and tensile strength of the samples treated by solution and aging are significantly improved,while the plasticity is not obviously changed.Furthermore,the sample after solution treatment at 1040℃and aging at 470℃has the best comprehensive mechanical properties.

关 键 词：17-4PH 钢 时效处理 微观组织 力学性能 

分 类 号：TG146.1[一般工业技术—材料科学与工程]