基于CMT技术的镀锌钢-铝合金板焊接变形研究  

Deformation Analysis of Welding of Galvanized Steel-Aluminum Alloy Sheet Based on CMT Welding Technology

作　　者：王夏杰 邢彦锋[1] 金光灿[1] WANG Xiajie,XING Yanfeng,JIN Guangcan(School of Automotive Engineering, Shanghai University of Engineering Science, Shanghai 201620,Chin)

机构地区：[1]上海工程技术大学汽车工程学院,上海201620

出　　处：《轻工机械》2018年第2期1-5,共5页Light Industry Machinery

基　　金：国家自然科学基金项目(51105241);上海工程技术大学研究生科研创新基金项目(E3-0903-17-01084)

摘　　要：为了研究镀锌钢和铝合金边塞焊变形问题,应用冷金属过渡(CMT)技术,采用五因素(送丝速度、焊接时间、铝板厚度、开孔直径和弧长修正)三水平(低、中、高)的正交试验方法。通过对焊接件变形量分析,得到最佳焊接工艺参数组合,并通过拉伸试验和金相试验考察了最佳工艺参数下的焊接件的连接强度和焊接质量。研究结果表明:送丝速度、铝板厚度、开孔直径对焊接变形的影响最大;最佳焊接工艺参数组合为送丝速度5 m/min,开孔直径6 mm,铝板厚度1.5mm,弧长修正5%,焊接速度1.6 m/min。经方差分析所得到的最佳焊接参数组合,不仅使焊接薄板变形量较小,而且能够达到所需的连接强度。Cold metal transfer （ CMT） technology was applied for galvanized steel and aluminum alloy edge plug welding deformation problem, using the five factors （ wire feeding speed, welding time, aluminum plate thickness, hole diameter and arc length correction） three levels （low, medium and high） orthogonal test method. Through the analysis of deformation quantity, the optimum welding parameters were obtained. The connection strength and welding quality of the weldment under the optimum technological parameters were investigated by tensile test and metallographic test. The results show that wire feeding speed, aluminum plate thickness and opening diameter have the greatest influence on welding deformation. The optimal process parameters are combined with wire feeding speed of 5 m/min, opening diameter of 6 mm, the aluminum sheet thickness 1.5 mm, arc length correction 5% , and welding speed of 1.6 m/min. The best combination of welding parameters obtained by variance analysis not only makes the deformation of welding sheet smaller, but also achieves the required connection strength.

关 键 词：异种金属焊接 焊接变形 冷金属过渡 边塞焊 正交实验法 

分 类 号：TG453.9[金属学及工艺—焊接]