摘要
以0.05 mm厚的Zn箔作为中间层,采用非对称电极对2 mm厚的AZ31B镁合金和Q235钢进行电阻点焊。对接头特征区域进行了观察、分析,探讨了工艺参数对接头性能的影响。结果表明:在焊接区镁合金侧形成了熔核,熔核主要由(Mg)基体和MgZn析出物构成;随焊接电流的增大、焊接时间的延长,AZ31B/Q235焊接接头的抗剪载荷呈先增大后减小的变化趋势;当焊接电流为22 kA、焊接时间为300 ms时,接头的抗剪载荷达到最大,约为4.64 kN。
Resistance spot welding of 2 mm thick AZ31B magnesium alloy and Q235 steel was performed using an asymmetric electrode with a 0.05 mm thick Zn foil as the intermediate layer.The characteristic areas of the joint were observed and analyzed,and the influence of process parameters on the performance of the joint was discussed.The results show that a weld nugget is formed on the magnesium alloy side of the welding zone,which is mainly composed of(Mg)matrix and MgZn precipitates.With the increase of welding current and welding time,the shear load of the AZ31B/Q235 welded joint shows a trend of first increasing and then decreasing.When the welding current is 22 kA and the welding time is 300 ms,the shear load of the joint reaches its maximum,about 4.64 kN.
作者
张清扬
戚昊
李罡
崔东升
田浩楠
赵培峰
邱然锋
石红信
ZHANG Qing-yang;QI Hao;LI Gang;CUI Dong-sheng;TIAN Hao-nan;ZHAO Pei-feng;QIU Ran-feng;SHI Hong-xin(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Henan Tungsten Molybdenum Material Digital Forming Engineering Research Center,Luoyang 471822,China;Longmen Laboratory,Luoyang 471023,China)
出处
《材料热处理学报》
北大核心
2025年第4期211-217,225,共8页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(51875177)
河南省科技攻关项目(242102220090)
龙门实验室前沿探索课题(LMQYTSKT010)。
关键词
镁合金
低碳钢
中间层
电阻点焊
magnesium alloy
low carbon steel
interlayer
resistance spot welding
