基于响应面分析的T型接头激光深熔焊焊缝形貌预测及工艺参数优化  

Weld Profile Prediction and Process Parameters Optimization of T-joints of Laser Full Penetration Welding via Response Surface Methodology

作　　者：褚振涛[1] 于治水[1] 张培磊[1] 卢庆华[1] 李绍伟[1] 马凯[1] 

机构地区：[1]上海工程技术大学材料工程学院,上海201620

出　　处：《中国激光》2015年第2期100-108,共9页Chinese Journal of Lasers

基　　金：国家自然科学基金(51375294);上海市教委创新重点项目(12ZZ186);上海市自然科学基金(12ZR1444500)

摘　　要：为了预测激光深熔焊T型接头的焊缝形貌并优化工艺参数,基于响应面分析的方法,建立了激光深熔焊工艺参数与焊缝形貌特征参数之间的数学模型,进行了方差分析、模型验证。基于所建模型,研究了工艺参数对焊缝形貌的影响规律,并对工艺参数进行了优化,从而实现了对焊缝形貌的预测。结果表明,所建立模型能够准确预测焊缝形貌,预测值与实验值误差很小,经优化的工艺参数既满足焊缝形貌要求也可降低热输入约27%。In order to predict weld profile of T-joints and optimize the process parameters of the laser full penetration welding, the statistical models between parameters and the weld bead geometry of T-joints are established using response surface methodology. Then the analysis of variance is checked and these mathematical models are validated. Based on this model, effects of different process parameters on the weld profile are investigated, the process parameters are optimized, and the weld profile is predicted. The results indicate that the proposed models predict the responses adequately and the predicted values are consistent with experimental results. The optimum welding conditions are found that it can reduce the heat input about 27%.

关 键 词：激光技术 激光深熔焊 T型接头 焊缝形貌预测 参数优化 响应面分析 

分 类 号：TG456.7[金属学及工艺—焊接]