17-4PH不锈钢热处理工艺  

Heat treatment of 17-4PH stainless steel

作　　者：张敏[1] 褚巧玲[1] 

机构地区：[1]西安理工大学材料科学与工程学院,陕西西安710048

出　　处：《金属热处理》2012年第9期8-11,共4页Heat Treatment of Metals

基　　金：陕西省自然科学基金(2012JM6003);西安市科技计划项目(CX1250②)

摘　　要：介绍了不同的热处理工艺对17-4PH马氏体沉淀硬化不锈钢力学性能及组织的影响,对其沉淀硬化机理进行了总结和探讨。17-4PH不锈钢兼有强度高、耐蚀性好的优点。传统的工艺为固溶+时效处理,普遍采用的固溶温度为1040℃,随着时效温度的提高和时效时间的延长,其强度和硬度升高,塑韧性降低。在传统工艺的基础上,增加调整处理,可以细化马氏体基体组织,提高材料的韧性及耐蚀性。对于17-4PH钢的强化机理,普遍认为与ε-Cu的析出有关,但对于其形貌的分析不尽相同。Effect of heat treatment on mechanical properties and microstructure of 17-4PH martensite stainless steel is introduced, the mechanism of precipitation hardening of the steel is summarized and discussed. It was widely used owing to its high strength and excellent corrosion resistance. The traditional heat treatment of the steel is solution and aging. Generally, solution temperature is 1040 ℃. The strength and hardness increase gradually with aging temperature and time increasing, while the impact property decreases. With the intermediate treatment among the solid solution and aging, the impact property and the corrosion resistance are obviously increased due to the refined martensite lath. It is widely believed that the mechanism of precipitation hardening of 17-4PH martensite stainless steel is due to the precipitation of ε-Cu, but the analysis about morphology of ε-Cu is various.

关 键 词：17-4PH不锈钢 固溶处理 时效处理 调整处理 

分 类 号：TG142.71[一般工业技术—材料科学与工程]