DP780熔化极气体保护焊工艺参数优化  

Parameter optimization for MAG of DP780

作　　者：卢振洋[1] 汤超[1] 熊威[1] 黄鹏飞[1] 

机构地区：[1]北京工业大学焊接研究所,北京100124

出　　处：《焊接学报》2013年第12期9-12,1,共4页Transactions of The China Welding Institution

基　　金：国家科技重大专项资助项目(2009ZX04014-072);国家自然科学基金资助项目(51075011)

摘　　要：以2 mm板厚无涂层DP780为研究对象,运用正交试验方法优化其熔化极气体保护焊工艺参数.主要研究了送丝速度、焊接速度、电弧电压、焊丝伸出长度、焊接倾角5个因素对DP780搭接接头抗拉强度的影响规律.根据正交试验的极差和方差分析,找到了影响接头抗拉强度的主要因子为送丝速度和焊接速度,其它因子对接头强度影响不显著;基于多元回归分析,拟合了近似曲线,得到了控制接头抗拉强度的近似数学模型,揭示了主要工艺参数对接头抗拉强度的影响规律.Gas metal arc welding parameters were optimized by orthogonal experiments for 2mm thick uncoated DP780 steel plate.The influences of five factors including wire feeding rate,welding speed,arc voltage,wire extension and welding angle on tensile strength of DP780 lap joints were discussed.The range analysis and variance analysis proved that wire feeding rate and welding speed are the main influencing factors on the tensile strength of the join,and the other factors show no regularity to tensile strength.An approximate mathematical model to control the tensile strength of the joint was obtained by fitting the proximate curve through multiple regression analysis,which revealed the regularity of effects of main welding parameters on the tensile strength of the joint.

关 键 词：先进高强钢 熔化极气体保护焊 工艺参数优化 

分 类 号：TG441.4[金属学及工艺—焊接]