摘要
对ZG06Cr13Ni4Mo马氏体不锈钢进行了焊后低温热处理工艺试验(240、300℃),通过显微组织分析、拉伸及弯曲试验、硬度试验及残余应力测试对不同低温热处理下焊接接头的显微组织、力学性能、硬度和残余应力等进行了研究。结果表明,经低温热处理后,接头焊缝热影响区组织为回火马氏体及碳化物,接头焊缝区的组织为低碳马氏体+块状马氏体+碳化物,接头的抗拉强度变化不大,硬度略有下降,经240℃低温热处理后,焊接接头焊缝处的残余应力消除了69.1%。
Low temperature heat treatment(240 and 300℃)of ZG06Cr13 Ni4 Mo martensitic stainless steel after welding was carried out.The microstructure,mechanical properties,hardness and residual stress of the joints after different low temperature heat treatments were studied by means of OM,tensile and bending test,hardness test and residual stress test.The results show that after low temperature heat treatment,the microstructure of the HAZ of the joints is tempered martensitic and carbide,and the microstructure of the welding zone is low carbon martensitic,block martensitic and carbide.Meanwhile,the tensile strength of the joints varies little,and the hardness decreases slightly.The residual stress at welding zone of the joint after 240℃ low temperature heat treatment is relieved by 69.1%.
作者
史顺望
刘波
穆磊
姜宏伟
葛荣凡
Shi Shunwang;Liu Bo;Mu Lei;Jiang Hongwei;Ge Rongfan(Chongqing Pump Factory Co.,Chongqing 400030,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2020年第12期136-139,共4页
Heat Treatment of Metals
关键词
马氏体不锈钢
低温热处理
力学性能
残余应力
martensitic stainless steel
low temperature heat treatment
mechanical properties
residual stress
