17-4PH不锈钢热处理工艺研究  

Study on production Heat treatment process of 17-4PH Stainless Steel

作　　者：宋海刚 郜均虎 

机构地区：[1]江阴市恒业锻造有限公司,江苏无锡214423 [2]无锡派克新材料科技股份有限公司,江苏无锡214161

出　　处：《世界有色金属》2017年第7期83-84,共2页World Nonferrous Metals

摘　　要：本文通过金相分析和力学性能测试等方法,研究了四种不同热处理工艺对17-4PH合金组织性能的影响。结果表明:在固溶处理后,17-4PH合金的强硬度随着时效温度的提高逐渐降低,而塑性和韧性有所增加。在490℃时效处理前进行油冷至250℃并出油空冷至室温,由于均匀细小马氏体组织的存在,合金具有优异的综合力学性能。因此在本试验条件下,17-4PH合金的最佳热处理工艺为在≤650℃进炉,1040℃固溶3小时,油冷至≤250℃出油空冷至室温,490℃时效5小时,空冷。The effect of different heat treatment processes on microstructure and mechanical properties of 17-4PH stainless steel were studied by optical microscope and properties tester. The results show that the strength and hardness decrease gradually, while the impact property increases with the aging temperature rising. It can be concluded that the comprehensive mechanical properties of 17-4PH stainless steel which resulting in the homogeneous and finer martensite were obtained by solution treated at 1040℃ for 3h, oil cooled to ≤ 250℃, and then aged at 490℃ for 5h.

关 键 词：17-4PH合金 热处理 组织性能 

分 类 号：TG156.9[金属学及工艺—热处理]