冷却方式对72钢对焊组织及性能的影响  

Effect of cooling mode on microstructure and properties of 72 steel butt welding

作　　者：蔡继峰 黄顺冰 侯挺挺 闫保国 杨斌博 Cai Jifeng;Huang Shunbing;Hou Tingting;Yan Baoguo;Yang Binbo(Xianyang BOMCO Steel Tube&Wire Rope Co.,Ltd.,Xianyang 712000,China)

机构地区：[1]咸阳宝石钢管钢绳有限公司股绳车间,陕西咸阳712000 [2]咸阳宝石钢管钢绳有限公司质量检测部,陕西咸阳712000 [3]咸阳宝石钢管钢绳有限公司,陕西咸阳712000

出　　处：《金属制品》2021年第5期50-53,共4页Metal Products

摘　　要：用光学显微镜、拉伸和扭转试验研究了冷却方式对72钢显微组织和力学性能的影响。结果表明:72钢接头组织为回火索氏体+少量珠光体+少量铁素体,5.5 s回火时,随着冷却方式转变,钢丝接头组织构成由索氏体+珠光体变为索氏体+少量珠光体+少量铁素体,接头抗拉强度和扭转性能均逐渐升高,油冷条件下,焊接接头具有较好的强度塑性配比,满足3.08 mm钢丝对焊工艺要求。To study effects of cooling mode on microstructure and mechanical properties of 72 steel by optical microscope,tensile and torsion tests.Results show that microstructure of 72 steel joint is tempered sorbite,small amount of pearlite and small amount of ferrite.During 5.5 s tempering,with change of cooling mode,microstructure of steel wire joint changes from sorbite and pearlite to sorbite,small amount of pearlite and small amount of ferrite.Tensile strength and torsion of joint gradually increase,oil cooling reaches the highest value,and has a good strength plastic ratio,which can be used as butt welding process of diameter 3.08 mm steel wire.

关 键 词：72钢 焊缝 显微组织 力学性能 电阻对焊 

分 类 号：TG453.9[金属学及工艺—焊接]