双电极焊条TE4303单弧焊接分析  

Analysis on single arc welding with twin electrode of TE4303

作　　者：李立英[1] 邹增大[2] 韩彬[1] 黎超文[1] 

机构地区：[1]中国石油大学(华东)机电工程学院,山东东营257061 [2]山东大学材料科学与工程学院,济南250061

出　　处：《焊接学报》2011年第5期81-84,117,共4页Transactions of The China Welding Institution

基　　金：中国石油大学(华东)博士创新基金资助项目(B2009-13)

摘　　要：从焊接效率与节能、微观组织、力学性能、断口形貌等方面对钛钙型双电极焊条（TE4303）单弧焊进行了研究．结果表明，与传统单芯焊条（E4303）电弧焊相比，当采用相同的焊接电流时，TFA303单弧焊熔化系数和熔敷系数可提高1倍，熔化单位重量焊条金属节省电能约20％-30％；TE4303单弧焊对母材热输入小，接头熔合比小，焊缝的柱状晶更细长；熔敷金属的化学成分和力学性能均在标准要求的范围内，且没有发生明显的变化；断口呈韧性断裂，采用电子探针分析夹杂物成分均为氧化物．Single arc welding with twin electrode(TE4303) was studied from the welding efficiency and energy saving,microstructure,mechanical properties,and fracture morphology.The results show that melting coefficient and deposition coefficient of TE4303 single arc welding are as two times higher as that of the traditional single electrode(E4303) arc welding.Compared with E4303 arc welding,TE4303 single arc welding can save electrical energy about 20%~30% to melt per unit weight of electrode metal.Meanwhile,its welding heat input is low to get the small fusion ratio.The columnar grains in weld are much slimmer at the same welding current.It is also found that both the compositions and mechanical properties of the deposited metal meet the requirements of standards.The analysis on fracture appearance shows that it is ductile fracture with dimple mode,and the inclusions are oxides which are analyzed by electron probe microscope.

关 键 词：双电极焊条 单弧焊 效率与节能 微观组织 力学性能 

分 类 号：TG444[金属学及工艺—焊接]