高强钢电阻点焊工艺研究  

Resistance Spot Welding Technology of High Strength Steel

作　　者：王敏[1] 杨海峰 刘兴毅 WANG Min;YANG Haifeng;LIU Xingyi(Changchun Institute of Technology,Mechanical and Automotive Engineering,Changchun 130012,China;Shandong Provincial Key Laboratory of Special Welding Technology,Harbin Institute of Technology at Weihai,Weihai 264209,China)

机构地区：[1]长春工程学院机械与汽车学院,吉林长春130012 [2]哈尔滨工业大学(威海)山东省特种焊接技术重点实验室,山东威海264209

出　　处：《电焊机》2023年第11期107-112,共6页Electric Welding Machine

基　　金：吉林省自然科学基金(YDZJ 202301ZYTS540)。

摘　　要：以1 mm厚的Q&P980钢板为研究对象,对其进行电阻点焊,分析焊接接头的力学性能、显微硬度、观察其显微组织。结果表明:熔核区由尺寸较粗大的板条马氏体构成,热影响区由板条状马氏体、铁素体和奥氏体构成;随着焊接电流、焊接时间和电极压力的增加,接头拉剪载荷呈先增后减的趋势,点焊接头热影响区细晶区显微硬度最高,约为485 HV。当焊接时间为10 cyce,焊接电流为12.5 kA,电极压力为2.4 kN时,综合力学性能最好。The Q&P980 steel plate was studied by resistance spot welding in this paper.Mechanical properties,microhard‐ness distribution and microstructure were researched.The results show that the microstructure of the nugget zone is coarse lath martensite,and the mirostructure of the heat affected zone is consist of fine lath martensite,ferrite and austenite.The shear tension firstly increased and then decreased with the increasing of welding current,welding time and Electrode pres‐sure,the microhardness of fine-grained area is the highest at the joint,about 485 HV.The optimal welding process param‐eters are welding time 10 cycle,welding current 12.5 kA,and electrode pressure 2.4 kN.

关 键 词：Q&P980钢板 电阻点焊 力学性能 微观组织 

分 类 号：TG44[金属学及工艺—焊接]