异种金属CO_2气体保护焊接头的组织与性能研究  

Study on Microstructure and Properties of Dissimilar Metals Joint with Carbon-dioxide Arc Welding

作　　者：王少刚[1,2] 赵凯[2] 顾冰芳[1] 

机构地区：[1]解放军理工大学工程兵工程学院,江苏南京210007 [2]南京航空航天大学材料科学与技术学院,江苏南京210016

出　　处：《热加工工艺》2010年第9期146-149,共4页Hot Working Technology

摘　　要：研究了采用CO2气体保护焊方法焊接异种金属紫铜-低碳钢、紫铜-不锈钢、低碳钢-不锈钢的可行性,并利用扫描电镜、光学金相显微镜、X射线衍射仪、拉伸试验机等分析测试手段,对获得接头的显微组织结构、化学成分、断口特征、力学性能等进行了系统分析研究。结果表明,在试验条件下,获得接头焊缝表面成形良好,界面连接处未发现有微裂纹、夹渣和未熔合等焊接缺陷,接头力学性能可满足实际使用要求。The feasibility of carbon-dioxide arc welding was investigated when dissimilar metals such as copper-carbon steel,copper-stainless steel,carbon steel-stainless steel were taken as base materials.The microstructure,chemical compositions,fracture-graphs and mechanical properties,etc,of welded joints were analyzed by scanning electron microscopy（SEM）,optical microscope（OM）,X-ray diffractometer（XRD）,tensile test machine,etc.The results show that the weld appearance of the welded joint is better,and no weld defects such as micro-crack,slag inclusion and lack of fusion,etc,can be found in bonding interface of the welded joint.The mechanical properties of the welded joint can meet the request of engineering application.

关 键 词：CO2气体保护焊 异种金属 力学性能 微观组织 

分 类 号：TG444.73[金属学及工艺—焊接]