回火处理对ZG04Cr13Ni4马氏体不锈钢铸件组织及性能的影响  

Effect of Tempering Treatment on Microstructure and Properties of ZG04Cr13Ni4 Martensitic Stainless Steel Castings

作　　者：孙兰[1] 杨明川 蒋繁 鲜广[1] 范洪远[1] SUN Lan;YANG Mingchuan;JIANG Fan;XIAN Guang;FAN Hongyuan(School of Mechanical Engineering,Sichuan University,Chengdu 610065,China;China Construction Steel Structure Engineering Co.,Ltd.,Meishan 620564,China)

机构地区：[1]四川大学机械工程学院,四川成都610065 [2]中建钢构工程有限公司,四川眉山620564

出　　处：《铸造技术》2022年第2期95-98,共4页Foundry Technology

基　　金：四川省科技计划重点研发项目(2020YFG0265)。

摘　　要：以800~1000 MW级水轮机转轮常用材料ZG04Cr13Ni4马氏体不锈钢为研究对象,分析了不同回火温度和回火次数对材料显微组织及力学性能的影响。结果表明:ZG04Cr13Ni4马氏体不锈钢经过正火及一次回火或二次回火处理后,其金相组织均为板条状马氏体,并具有明显的原奥氏体晶界;当二次回火温度进一步升高时,板条状马氏体粗化,但仍保持马氏体板条位向及形貌;经正火及二次回火后材料综合力学性能显著提高;最佳热处理工艺为选择正火及二次回火工艺,且回火温度控制在600~640℃可以满足产品行业标准中力学性能要求。The microstructure and mechanical properties of ZG04Cr13Ni4 martensitic stainless steel commonly used for 800-1000 MW water turbine runner were studied at different tempering temperatures and times.The results show that the microstructure of ZG04Cr13Ni4 martensitic stainless steel after normalizing and primary or secondary tempering is strip martensite and has obvious original austenite grain boundary.When the secondary tempering temperature increases further,the lath martensite becomes coarser,but still retains the orientation and morphology of martensite lath.After normalizing and secondary tempering,the comprehensive mechanical properties of the materials are significantly improved.The best heat treatment process is normalizing and secondary tempering process,and the tempering temperature is controlled between 600℃and 640℃,which can meet the mechanical properties requirements of product industry standards.

关 键 词：ZG04Cr13Ni4 马氏体不锈钢 回火温度 热处理 力学性能 

分 类 号：TG156[金属学及工艺—热处理] TG113[金属学及工艺—金属学]