元素W对手工自蔓延焊接接头组织性能的影响  

Effect of W content on Microstructure and Property of Manual SHS Welding Joint

作　　者：辛文彤[1] 马世宁[1] 张保元[2] 李志尊[2] 

机构地区：[1]装甲兵工程学院装备再制造技术国防科技重点实验室,北京100072 [2]军械工程学院基础部,河北石家庄050003

出　　处：《热加工工艺》2008年第13期9-10,14,共3页Hot Working Technology

摘　　要：研究了焊条中合金元素钨的添加量对手工自蔓延焊接接头组织形态的影响,以及由此引起的力学性能变化。试验发现,W主要起到细化晶粒的作用,当W含量小于3%时熔合区晶粒明显变细小,强度、韧性随之增强;但当W含量大于3%时,W便会在晶界偏聚,析出严重,影响焊接接头的性能。By adjusting W content, the changes of the microstructure and mechanical properties of welded joint and fusion area were studied. The experimental results indicate that when W content is lower than 3%, a fine grain fusion area is observed, and the strength and toughness is improved, but when W content is higher than 3%, alloy element W segregates and separates out in grain boundaries, which affects the properties of welded joint.

关 键 词：手工自蔓延焊接 焊缝组织 性能 

分 类 号：TG456[金属学及工艺—焊接]