时效处理对05Cr17Ni4Cu4Nb马氏体沉淀硬化不锈钢力学性能及组织的影响  

Effect of Aging Treatment on Mechanical Properties and Microstrure of 05Cr17Ni4Cu4Nb Martensitic Precipitation Hardening Stainless Steel

作　　者：卫争艳[1,2] 徐梅[1,2] 谭国华 Wei Zhengyan;Xu Mei;Tan Guohua(State Key Laboratory of Advanced Stainless Steel Materials,Taiyuan Iron&Steel(Group)Co Ltd,Taiyuan 030003;Technology Center,Shanxi Taiyuan Stainless Steel Co Ltd,Taiyuan 030003)

机构地区：[1]太原钢铁(集团)有限公司先进不锈钢材料国家重点实验室,太原030003 [2]山西太钢不锈钢股份有限公司技术中心,太原030003

出　　处：《特殊钢》2021年第5期85-88,共4页Special Steel

基　　金：山西省科技重大专项基金项目资助(20181101009)。

摘　　要：试验研究了1040℃固溶的马氏体沉淀硬化不锈钢05Cr17Ni4Cu4Nb在480~620 ℃时效5 h的组织,强度和硬度。结果表明,随时效温度升高,马氏体基体逐渐分解,碳化物析出而降低;在时效处理过程中,随时效温度升高,富Cu相最初以球形析出,逐渐发展成椭圆形及杆状,尺寸增大,与基体共格界面消失,强化效果减弱;05Cr17Ni4Cu4Nb钢经1 040℃固溶,480℃5 h时效后,其HRC硬度值44.3,满足钢材HRC硬度值43的要求。The microstructure,strength and hardness of martensitic precipitation hardening stainless steel 05Cr17Ni4Cu4Nb solid solution at 1040℃ and aged at 480~620℃ for 5h have been tested and studied.The results show that with the increasing aging temperature,the descomposition of martensitic matrix structrue gradually and the precipitation of carbide decrease.During the aging treatment,with increasing aging temperature the copper-rich phase is precipi-taed as a sphere at first and then gradually developed to oval and rod shape,the size of precipitates are increased,the number decreased and the coherent interface with the matrix disappears,the stengthening effect decreases.With solution-treated at 1040℃ and aged at 480℃ for 5 h,the HRC hardness number of 05 Cr17Ni4Cu4Nb steel is 44.3,to meet the requirement of product HRC hardness number 43.

关 键 词：沉淀硬化马氏体不锈钢05Cr17Ni4Cu4Nb 时效处理 富Cu相 析出相 

分 类 号：TG156.92[金属学及工艺—热处理] TG142.71[金属学及工艺—金属学]