响应面法分析7A52铝合金光纤激光焊气孔敏感性  

Porosity sensitivity analysis of 7A52 aluminum alloy during fiber laser welding by response surface method

作　　者：陈超[1] 陈芙蓉[1] 张慧婧[1] 

机构地区：[1]内蒙古工业大学材料科学与工程学院,呼和浩特市010051

出　　处：《焊接》2016年第5期17-21,73-74,共5页Welding & Joining

基　　金：内蒙古青年科技英才领军人物项目(103-841025)

摘　　要：研究了焊接功率、焊接速度、离焦量3个因素对7A52光纤激光焊焊缝气孔率的影响规律,进而确定较优焊接工艺。采用二次回归正交旋转组合设计法,对预测模型进行方差分析,确定各因素的显著性,借助响应面分析方法得出较优焊接工艺。结果表明,回归模型确定后,选用各因素的水平中间值对回归方程进行检验,结果显示气孔率实测值与气孔率预测值较为接近,预测值比实测值高1.8%,模型拟合度较好。借助Design-Expert软件进行响应面分析,得到较优焊接工艺:焊接功率4 590 W、焊接速度53.07 mm/s,离焦量-0.62。The response surface method was used to study the influence of the welding power,welding speed and defocusing distance on porosity in fiber laser welding of 7A52 aluminum alloy and the optimal welding process was determined. The results of regression model indicate that the predicted porosity is higher by 1. 8% than the measured result. With the aid of the design-expert software for response surface method,the optimal welding process is determined as follows,welding power of 4 590 W,welding speed of 53. 07 mm / s and defocusing distance of -0. 62.

关 键 词：响应面分析 光纤激光焊 7A52铝合金 气孔率 

分 类 号：TG456.7[金属学及工艺—焊接]