HS-80高强钢焊丝激光-MAG复合焊熔敷金属特性  

Characteristics of metal deposited by laser-MAG hybrid welding with HS-80 welding wire

作　　者：雷振[1] 滕彬[1] 王旭友[1] 赵旭东 

机构地区：[1]机械科学研究院哈尔滨焊接研究所,哈尔滨150080 [2]利勃海尔机械(大连)有限公司,大连116600

出　　处：《焊接学报》2011年第8期37-41,115,共5页Transactions of The China Welding Institution

基　　金：国家"十一五"科技支撑计划基金资助项目(2006BAF04B10);国际科技合作基金资助项目(2009DFR50170)

摘　　要：研究了HS-80焊丝激光-MAG复合焊和MAG焊两种焊接方法的熔敷金属特性.与MAG焊相比,激光-MAG复合焊熔敷金属的屈服强度、抗拉强度和冲击韧度显著提高,熔敷金属的组织更加细小,合金元素过渡系数增大.高速焊接导致的熔池金属冷却速度快及熔池金属流动性的增加是导致复合焊熔敷金属组织细化的主要原因.焊缝金属中Ti,Mo等细化晶粒元素含量的增加也是焊缝组织发生细化的一个重要原因.熔敷金属组织晶粒细化及由合金元素过渡系数增大而引起的合金元素含量的增加是激光-MAG复合焊熔敷金属综合力学性能提高的主要原因.The mechanical properties and welding metallurgy laws of deposited metal of HS-80 welding wire by laser-MAG hybrid welding and MAG welding were studied.The results showed that the yield strength,tensile strength and impact work of the deposited metal by laser-MAG hybrid welding were all enhanced observably compared with those by MAG welding,and the microstructure was finer.Meanwhile the alloying element transition coefficient of laser-MAG hybrid welding was increased.In the laser-MAG hybrid welding process,the weld puddle cooled quickly at the high welding speed and the laser beam made the weld puddle flow acutely.These two technology factors were the main reasons of grain refinement.Moreover the content increasing of some elements such as Ti and Mo,which can make grain finer,was another reason of grain refinement.The grain refinement of the microstructure and the content of alloying elements increasing due to the improving of alloying element transition coefficient were the main reasons that enhanced the toughness and mechanical strength of deposited metal by laser-MAG hybrid welding.

关 键 词：低合金高强钢焊丝 熔敷金属 激光 复合焊 

分 类 号：TG115.28[金属学及工艺—物理冶金]