304不锈钢激光焊接工艺及微观组织研究
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摘要
采用300 W准连续激光器对1.0mm厚的304不锈钢板进行拼接焊接试验,对激光焊接工艺参数进行正交优化试验,工艺参数为峰值功率3 000 W,脉冲宽度6ms,离焦量2mm时,焊接接头达到最佳的抗拉强度为723.6 MPa,高于母材。对焊缝微观组织进行分析,焊缝中心位置呈细小等轴晶。
The 300 W quasi-continuous laser was used to perform a splicing welding test on 1.0 mm thick 304 stainless steel plate.Through the process parameters tested by orthogonal optimization,when the peak power was 3 000 W,pulse width was6 ms,defocusing amount was 2 mm,the tensile strength of the joints reached 723.6 MPa,which was better than the base metal.The microstructure of the weld was analyzed and the center of the weld was a fine equiaxed crystal.
The 300 W quasi-continuous laser was used to perform a splicing welding test on 1.0 mm thick 304 stainless steel plate.Through the process parameters tested by orthogonal optimization,when the peak power was 3 000 W,pulse width was6 ms,defocusing amount was 2 mm,the tensile strength of the joints reached 723.6 MPa,which was better than the base metal.The microstructure of the weld was analyzed and the center of the weld was a fine equiaxed crystal.
引文
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[16]孟云飞,叶兵,闵腾,等.1 mm厚304不锈钢准连续脉冲光纤激光拼焊工艺研究[J].应用激光,2016(6):709-715.
[2]王诗洋,王旭友,滕彬,等.激光全熔透工艺参数对不锈钢焊接气孔率的影响[J].焊接,2015(6):30-34.
[3]关矞心,董超芳,李岩,等.304L不锈钢在核电一回路水中应力腐蚀行为的研究[J].科技导报,2011,29(21):17-21.
[4]陈五星,戴明辉,陈大军,等.不锈钢与渗碳钢惯性摩擦焊接头的组织与性能[J].精密成形工程,2017,9(5):198-202.
[5]李忠辉.地铁不锈钢车体底架波纹板电阻点焊焊点优化和底架骨架变形的控制[J].金属加工(冷加工),2016(s1):754-757.
[6]徐永超,周斌军,周久红.不锈钢外板对2219铝合金拼焊板胀形性能的影响[J].精密成形工程,2016,8(5):65-70.
[7]梁行,姜云禄,陈怀宁,等.SUS301L不锈钢激光搭接焊工艺参数对焊缝形貌的影响[J].焊接,2017(7):23-28.
[8]蔡建鹏,蒋小华,张彦杰,等.坡口形式对SUS304奥氏体不锈钢对接接头残余应力和变形的影响[J].焊接学报,2016,37(2):63-66.
[9]陈俊科,石岩,刘佳,等.奥氏体不锈钢激光焊接工艺研究[J].应用激光,2015,35(3):335-338.
[10]杨涛,何双,陈勇,等.304L不锈钢激光-脉冲MAG复合焊电弧特性及焊缝成形分析[J].焊接学报,2016,37(7):65-69.
[11]周媛,蔡艳,衡昊坤,等.侧吹气体对奥氏体不锈钢激光焊缝组织和耐腐蚀性能的影响[J].中国激光,2017(5):107-114.
[12]姚星,段红平,李光,等.异种不锈钢激光焊接相结构变化对腐蚀特性的影响[J].材料热处理学报,2013,34(2):72-76.
[13]高杰,王娟,李亚江.异种钢的焊接研究现状[J].精密成形工程,2017,9(5):83-89.
[14]胡亮.6 mm不锈钢(304)光纤激光焊接工艺的研究[D].镇江:江苏大学,2010.
[15]耿平,杨玉玲,张多.18-8型奥氏体不锈钢低功率Nd:YAG激光焊接研究[J].激光与红外,2007,37(1):34-36.
[16]孟云飞,叶兵,闵腾,等.1 mm厚304不锈钢准连续脉冲光纤激光拼焊工艺研究[J].应用激光,2016(6):709-715.