不锈钢纳秒激光与毫秒激光焊接工艺研究
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摘要
分别采用纳秒激光器和毫秒激光器对0.2mm不锈钢进行搭接焊接工艺研究。在纳秒激光焊接工艺优化试验中,对激光功率,脉冲宽度,焊接速度三因素进行正交试验,在毫秒脉冲激光焊接工艺实验中,对激光峰值功率,脉冲宽度进行优化试验。结果表明:在下层材料背面无痕迹的前提下,在各自的最佳工艺参数条件下,纳秒焊接的单点最大拉力可达36.8N,毫秒焊接最大拉力为23.3N。对焊点切片分析表明,纳秒焊接的焊点截面成"束状",相对于毫秒激光焊点截面的"U"形,上下两层材料之间的熔合面积较大。
The nanosecond laser and millisecond laser were used to research the welding process of 0.2 mm stainless steel.In the optimization of nanosecond laser welding process,orthogonal test was started by laser power,pulse duration and welding speed,the optimization test of laser peak power and pulse duration was tested in the millisecond pulse laser welding process optimization test.The result showed that at the condition of no puncture on the back materials and under the optimum process parameters,the maximum spot tension of nanosecond laser was 36.8 N,and the millisecond laser was 23.3 N at the optimum parameter.The analytic result of cross section showed that the cross section of the nanosecond welding jointed in a bundle,which was relative to the " U" shape of the cross section of millisecond laser solder joints,and the fusion area between the upper and lower two layers was larger.
The nanosecond laser and millisecond laser were used to research the welding process of 0.2 mm stainless steel.In the optimization of nanosecond laser welding process,orthogonal test was started by laser power,pulse duration and welding speed,the optimization test of laser peak power and pulse duration was tested in the millisecond pulse laser welding process optimization test.The result showed that at the condition of no puncture on the back materials and under the optimum process parameters,the maximum spot tension of nanosecond laser was 36.8 N,and the millisecond laser was 23.3 N at the optimum parameter.The analytic result of cross section showed that the cross section of the nanosecond welding jointed in a bundle,which was relative to the " U" shape of the cross section of millisecond laser solder joints,and the fusion area between the upper and lower two layers was larger.
引文
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[3]李云涛,王宁煦,金飞翔.A304不锈钢薄板激光焊接接头微观组织及电化学腐蚀研究[J].重型机械,2014(3):25-28.
[4]王文先,张亚楠,崔泽琴,等.双面超薄不锈钢复合板激光焊接接头组织性能研究[J].中国激光,2011,38(5):91-96.
[5]王金凤,陈银银.不锈钢薄板激光焊接工艺研究[J].热加工工艺,2012,41(1):108-110.
[6]郭国林,杨莉,柳健,等.激光功率对304不锈钢薄板搭接接头组织和性能的影响[J].热加工工艺,2016,45(9):213-215.
[7]师文庆,杨永强,王迪,等.脉冲激光焊接H62黄铜[J].焊接学报,2010,31(7):101-104+118.
[8]李扬,胡绳荪,申俊琦.紫铜与316L不锈钢脉冲激光焊微观组织及力学性能[J].中国激光,2014,41(7):93-98.
[9]刘毅,余圣甫,王丹丹.薄板不锈钢与铝合金激光点焊工艺及裂纹形成机理研究[J].应用激光,2016,36(1):46-52.
[10]陈玉华,柯黎明,徐世龙,等.超薄不锈钢片微激光焊接的焊缝成形[J].金属热处理,2008(10):95-98.
[11]朱加雷,徐世龙,焦向东,等.304不锈钢薄板激光搭接焊工艺研究[J].激光与光电子学进展,2015,52(7):154-158.
[12]杨立军,孙贵铮,王金杰,等.A304不锈钢薄板激光焊工艺试验研究[J].电焊机,2011,41(1):66-69.
[13]张瑄珺,孙小兵,潘涌,等.304不锈钢薄板外观件激光焊接工艺研究[J].应用激光,2016,36(3):321-325.
[14]高晓龙,刘晶,张林杰,等.Nd:YAG激光器焊接钛合金薄板的工艺研究[J].焊接,2014(2):19-23.