Effect　of　Al　in　Ti－microalloyed　Mn－Ni－Mo　welding　wire　on　microstructure　and　toughness　of　deposited　metal  

作　　者：Tan Changying Zhang Xianhui and Sun Weifeng(Harbin Research Institute of Welding) 

出　　处：《China Welding》1995年第1期28-36,共9页中国焊接（英文版）

摘　　要：The effect of Al in Ti-microalloyed welding wire on microstructure and toughness of deposited metals is studied.The results show that the deposited metal toughness worsens with increasing Al in wire' The mechanism of Al is as follows:(1) Al makes oxygen content in deposited metal increase.(2)Al restrains the formation of Ti-rich oxide inclusion, which causes granular bainite microstructure in deposited metal.(3)The content of solute Ti in deposited metal increases with Al content in welding wire,as a result,a part of carbonrich constitution in deposited metal is in the form of twin martensite.The effect of Al in Ti-microalloyed welding wire on microstructure and toughness of deposited metals is studied.The results show that the deposited metal toughness worsens with increasing Al in wire' The mechanism of Al is as follows:(1) Al makes oxygen content in deposited metal increase.(2)Al restrains the formation of Ti-rich oxide inclusion, which causes granular bainite microstructure in deposited metal.(3)The content of solute Ti in deposited metal increases with Al content in welding wire,as a result,a part of carbonrich constitution in deposited metal is in the form of twin martensite.

关 键 词：Mn-Ni-Mo AL MICROSTRUCTURE TOUGHNESS deposited metal 

分 类 号：TG146.21[一般工业技术—材料科学与工程]