基于钢质铆钉的钛与低碳钢电阻单元焊接接头的组织与性能  

Microstructure and properties of resistance element welded joint of titanium and low-carbon steel based on a steel rivet

作　　者：朱少航 王楠楠[1,2] 田浩楠[1] 石红信 邱然锋[1,3] 里中忍[4] ZHU Shao-hang;WANG Nan-nan;TIAN Hao-nan;SHI Hong-xin;QIU Ran-feng;SATONAKA Shinobu(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Civil Aviation Flight University of China Luoyang College,Luoyang 471001,China;Longmen Laboratory,Luoyang 471000,China;Kumamoto University,Kumamoto 860-8555,Japan)

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]中国民航飞行学院洛阳分院,河南洛阳471001 [3]龙门实验室,河南洛阳471000 [4]日本熊本大学,日本熊本860-8555

出　　处：《材料热处理学报》2024年第12期219-228,共10页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51875177);龙门实验室前沿探索课题(LMQYTSKT010);河南省国际科技合作项目(242102521037)。

摘　　要：以腿径为4、6和8 mm的钢质铆钉为单元件,以Q235低碳钢为基板、TA2钛为穿孔板进行了电阻单元焊。分析了焊接电流、焊接时间对接头抗剪载荷和十字抗拉载荷的影响。利用扫描电镜观察接头中各区域微观组织结构,探讨接头微观结构对接头性能的影响。结果表明:钛/低碳钢电阻单元焊接接头的抗剪载荷与十字抗拉载荷随焊接电流、焊接时间的增加呈现先增大后减小的趋势;采用4、6和8 mm腿径的钢质铆钉焊接时,Ti/Q235接头抗剪载荷达到最大时所需的电流分别为9、12和14 kA,最大抗剪载荷分别为6.63、10.07和13.00 kN,最大十字抗拉载荷分别为2.61、5.67和7.24 kN。铆钉腿与穿孔板TA2的界面处形成的反应层主要由Fe在Ti中固溶体与TiFe构成。Resistance element welding was carried out with Q235 low-carbon steel as the substrate and TA2 titanium as the perforated plate by using steel rivets with leg diameters of 4,6,and 8 mm,and the influence of welding current and welding time on the tensile shear load and cross tension load of the joints was analyzed.Microstructure of various regions in the joints was investigated using scanning electron microscopy,and the effect of the microstructure on the properties of the joints was discussed.The results show that the tensile shear load and cross tension load of the titanium/low-carbon steel resistance element welding joints show a trend of first increasing and then decreasing with the increase of welding current and welding time.When using steel rivets with leg diameters of 4,6,and 8 mm for welding,the current required to reach the maximum tensile shear load of the Ti/Q235 joints is 9,12,and 14 kA,respectively,the maximum tensile shear loads are 6.63,10.07 and 13.00 kN,and the maximum cross tension loads are 2.61,5.67 and 7.24 kN,respectively.The reaction layer formed at the interface between the rivet leg and the perforated plate TA2 is mainly composed of Fe solid solution in Ti and TiFe.

关 键 词：钛 低碳钢 电阻单元焊 

分 类 号：TG453[金属学及工艺—焊接]