铁素体不锈钢激光-MAG复合热源焊缝成形及接头冲击韧性分析  

Appearance of weld and impact toughness for the joints of ferrite stainless steel by laser-MAG hybrid welding

作　　者：王旭友[1] 雷振[1] 毛辉[1] 杜兵[1] 

机构地区：[1]机械科学研究院哈尔滨焊接研究所,哈尔滨150080

出　　处：《焊接学报》2009年第12期21-25,共5页Transactions of The China Welding Institution

基　　金：国家"十一五"科技支撑计划资助项目(2006BAF04B10);哈尔滨市科技创新人才研究专项资金资助项目(2009RFYG003)

摘　　要：利用激光-MAG复合热源分别进行了T4003和TCS铁素体不锈钢的焊接试验研究.通过与常规MAG焊的对比,测试分析了两种焊接方法的焊缝成形、接头的低温冲击韧性及接头的微观组织.结果表明,激光-MAG复合热源焊接易于实现铁素体不锈钢的单面焊双面成形,与常规MAG焊相比,其焊接效率可以提高1倍以上.利用激光电弧复合热源可以提高铁素体不锈钢焊接接头的低温冲击韧性,较常规MAG焊,复合焊接头的低温冲击韧性可以提高50%以上.激光-MAG复合热源焊接接头热影响区粗晶区组织宽度明显小于常规MAG焊接头的粗晶区宽度.Laser-MAG hybrid welding of T4003 and TCS ferrite stainless steels was studied.Through comparing with the conventional MAG welding of ferrite stainless steel,the results of the two welding methods including the appearance of weld,impact toughness under low temperature and the microstructure of the butt joints were tested and analysed.The analysing results show that it is easy to get one-side welding with back by laser-MAG hybrid welding.Comparing with the conventional MAG welding,the welding efficiency of ferrite stainless steel by laserMAG hybrid welding can be improved more than one times,the low temperature impact toughness of the joints by laser-MAG hybrid welding can be improved over 50% than that of conventional MAG welding joints,and the width of coarse-grained zone of hybrid welding joints is thinner than that of MAG welding joints.

关 键 词：铁素体不锈钢 激光 MAG电弧 复合热源 

分 类 号：TG115.28[金属学及工艺—物理冶金]