合金元素对放热焊接接头显微组织的影响  

Effect of Alloying Element on Microstructure of Exothermic Welding Joint

作　　者：张整社[1] 张明谦[1] 曹红美[2] 李玲[2] 张国栋[2] 

机构地区：[1]中国铝业股份有限公司连城分公司,甘肃兰州730000 [2]武汉大学动力与机械学院,湖北武汉430072

出　　处：《中国材料科技与设备》2012年第3期60-62,共3页Chinese Materials Science Technology & Equipment

摘　　要：通过改变合金剂的组成，研究了放热焊接中合金元素Mn和Si的添加对焊缝金属微观组织和显微硬度的影响。试验结果表明，通过添加合金元素，能缓和反应剧烈程度，细化焊缝金属晶粒，提高焊缝硬度。当Mn和Si的添加比例均为0．25％时，焊缝组织最均匀，硬度较高。By changing the composition of alloying agent, the effect of alloying elements Mn and Si on microstructure of exothermic welding joint was studied. The results showed that the additional alloying elements could moderate the reaction, refine grains of weld metal and increase the hardness of welding joint. When the weight percentage of Mn and Si was both 0.25 %, the weld microstructure was the most uniform and the hardness was relatively high.

关 键 词：合金元素 放热焊接 焊缝组织 显微硬度 

分 类 号：TG470[金属学及工艺—焊接]