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采用纳秒红外激光器对超薄铜片/不锈钢异种材料进行焊接工艺研究。通过对激光功率、脉冲宽度、焊接速度三因素进行正交试验。结果表明,直径为1 mm的焊点最大剪切力可达18.7 N,参数为功率80 W,脉冲宽度100ns,焊接速度60mm/s。通过对焊点切片分析可知,焊接区域由多条焊缝组成,熔深一致性较好,上层紫铜材料嵌入下层不锈钢内部,下层不锈钢材料部分嵌入上层铜内部,形成“铆接”结构,增加了焊缝接头强度。
Study on the welding process of ultra thin copper / stainless steel dissimilar materials by nanosecond infrared laser. Through the laser power, pulse width, welding speed three factors orthogonal test. The results show that the maximum shearing force of the solder joint with the diameter of 1 mm can reach 18.7 N, the parameters are the power of 80 W, the pulse width of 100ns and the welding speed of 60mm / s. Through the analysis of the solder joint slice, the welding area is composed of multiple welds, and the consistency of penetration is good. The upper copper material is embedded in the lower stainless steel. The lower stainless steel material is partially embedded in the upper copper to form a “riveting” structure, increasing The weld joint strength.