焊丝成分对22MnB5热成形钢激光填丝焊接接头组织和性能的影响  

Effect of Filler Wire Composition on Microstructure and Properties of Welded Joint of 22MnB5 Hot Formed Steel in Laser Welding

作　　者：曹洋[1] 邢德远 赵琳[1] 夏明生[2] 彭云[1] 马成勇[1] 田志凌[1] Cao Yang;Xing Deyuan;Zhao Lin;Xia Mingsheng;Peng Yun;Ma Chengyong;Tian Zhiling(Central Iorn and Steel Research Institute,Beijing 10008l,China;Technology Center,Tangshan Steel Company,He Steel Group,Tangshan 063016,Hebei,China)

机构地区：[1]钢铁研究总院有限公司,北京100081 [2]唐山钢铁集团有限责任公司技术中心,河北唐山063016

出　　处：《应用激光》2023年第11期55-62,共8页Applied Laser

基　　金：钢铁研究总院自主投入研发专项(事21H62570Z);国家重点研发计划资助(2021YFB3701702)。

摘　　要：使用成分不同的焊丝对22MnB5热成形钢进行激光填丝焊接,利用光学显微镜、拉伸试验机、JMatPro软件研究Ni含量对焊接接头组织性能及相变温度的影响。结果显示,低Ni含量焊丝焊后经热处理,焊接接头焊缝区组织为马氏体和δ-铁素体的混合组织,接头抗拉强度为1357 MPa;高Ni含量焊丝焊后经热处理,焊接接头焊缝组织为全马氏体组织,接头强度为1516 MPa,接头强度系数达到92%。相较于低Ni焊丝,高Ni焊丝凝固过程中δ-铁素体的形成难度更大,形成全γ-奥氏体的速度也更快。The study explores the impact of varying Ni composition on the microstructure and phase change temperature of 22MnB5 hot-formed steel jointed through laser welding.Employing optical microscopy,tensile testing machines,and JMatPro software,it examines the weld joints created with filler wires of differing Ni content.The results showed that post heat treat-ment,the joints formed with low-Ni steel wire comprise a mix of martensite and delta-ferrite,attaining a tensile strength of 1357 MPa.Conversely,those created with high-Ni wire yield a fully martensitic microstructure following heat treatment,reac-hing a joint strength of 1516 MPa-equivalent to 92%strength coefficient.Notably,a higher Ni concentration in welding wire complicates the formation of-ferrite during solidification;however,it accelerates the generation rate of-austenite.

关 键 词：22MnB5热成形钢 激光焊接 填丝材料 显微组织 力学性能 

分 类 号：TG456.7[金属学及工艺—焊接]