基于RSM的铝／钢异种金属激光熔钎焊工艺研究与参数优化  

Research of Aluminum/Steel Dissimilar Metal Laser Welding-Brazing and Parameter Optimization Based on RSM

作　　者：周建忠[1] 佘杰[1] 黄舒[1] 孟宪凯[1] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《中国激光》2015年第B09期124-132,共9页Chinese Journal of Lasers

基　　金：江苏省科技支撑项目（工业）（BE2013097）、江苏大学高级人才启动基金（13JDG109）、江苏省自然科学基金（BK20141166）、江苏省光子制造科学与技术重点实验室开放基金项目（GZ201305）

摘　　要：采用铝硅焊丝（ER4043）对6061铝合金和SUS304不锈钢试样进行激光填丝熔钎焊，焊接接头采用对接方式。使用响应曲面法建立了焊接工艺参数与抗拉强度的数学模型。然后使用抗拉强度作为优化目标，采用数值优化方法确定了焊接最佳工艺参数，并使用优化后的工艺参数进行焊接试验。结果表明，基于响应曲面法建立的数学模型具有较好的准确性，各焊接参数对抗拉强度的交互作用明显，使用优化后的工艺参数焊接获得的最大抗拉强度可达180MPa，金属间化合物厚度约为2．85μm。Dissimilar metal butt joints of 1 mm thickness 6061 aluminum alloy and 1 mm 304 stainless steel are welded with filler material by fiber laser welding-brazing method. The mathematical model of relationships between welding parameters and tensile strength is established based on the response surface methodology. Effects of different parameters on the tensile strength are discussed. Afterwards, the tensile strength is used as an optimization goal and the optimum welding parameters are determined with the aid of the numerical optimization method. In order to test the suitability of the mathematical model, the optimized process parameters are used to carry out the welding experiment. The interaction effects of welding parameters on the tensile strength is significant. The results indicate that the maximum tensile strength of the welded joints can reach 180 MPa and the thickness of the intermetallic compounds is almost 2.85 μm.

关 键 词：激光技术 铝/钢异种金属 激光填丝 熔钎焊 响应曲面法 工艺参数优化 

分 类 号：TG456.7[金属学及工艺—焊接]