万瓦级光纤激光-MAG复合焊接焊缝成形  

Formation of weld by high-power fiber laser-MAG hybrid welding

作　　者：蒋宝 雷振 黄瑞生 杨义成 梁晓梅 Jiang Bao;Lei Zhen;Huang Ruisheng;Yang Yicheng;Liang Xiaomei(Harbin Welding Institute Limited Company,Harbin 150028,China)

机构地区：[1]哈尔滨焊接研究院有限公司,哈尔滨150028

出　　处：《焊接》2020年第6期5-11,32,61,共9页Welding & Joining

基　　金：国家科技重大专项项目(2019ZX04004001);黑龙江省省级资金资助项目(GX18A007);黑龙江省头雁行动计划-能源装备先进焊接技术创新团队。

摘　　要：利用平板堆焊的方法,较为系统地研究了激光功率、离焦量、热源顺序、热源间距、热源排列方式、焊接速度及焊接电流对万瓦级光纤激光-MAG电弧复合焊接焊缝成形的影响。结果表明,在较小的电流条件下,激光功率越高,离焦量对焊缝成形的影响越显著。其中激光功率为10 kW时,离焦量对焊缝成形的影响较小;当激光功率增加到20 kW后,采用负离焦时更有助于获得良好的焊缝表面成形。热源顺序及热源间距对焊缝成形的影响同样显著。在负离焦条件下,采用电弧在前的热源顺序及较大的热源间距时,获得的焊缝成形更好;而采用激光在前及较小的热源间距时,产生的飞溅较多,同时焊缝均匀性差。但是通过大幅增加焊接电流,同样能够获得相对良好的焊缝表面成形。采用负离焦及电弧在前的热源顺序时,更有助于增加焊缝熔深。Effects of laser power,defocusing amount,heat source sequence,heat source distance,heat source arrangement,welding speed and welding current on formation of weld by high-power laser-MAG hybrid welding were studied systematically with the method of plate surfacing.The results showed that the effect of defocusing amount on formation of weld was more significant with the higher laser power under the condition of lower current.The defocusing amount had little influence on formation of weld when the laser power was at 10 kW,while formation of weld surface was better with negative defocusing amount when the laser power increased to 20 kW.The influence of heat source sequence and heat source distance on formation of weld was also significant.Under the condition of negative defocusing amount,better formation of weld was obtained with arc-leading and larger heat source spacing.When using laser-leading and smaller heat source space,more spatter generated and the weld uniformity was poor.But better weld was obtained by significantly increasing the welding current.Using negative defocusing amount and arc-leading was more helpful to increase weld penetration.

关 键 词：万瓦级光纤激光 MAG电弧 复合焊接 焊缝成形 

分 类 号：TG456.7[金属学及工艺—焊接]