Effect of microstructure on toughness of 9Cr-lMo deposited metal with varying heat inputs  

作　　者：王红鸿 胡锋 吴开明 

机构地区：[1]Key Laboratory for Systems Science on Metallurgical Processing, Wuhan University of Science and Technology, Wuhan, 430081.

出　　处：《China Welding》2011年第2期46-50,共5页中国焊接（英文版）

摘　　要：The microstractures of 9Cr-lMo multipass deposited metal were observed. The effect of microstructure on impact toughness of 9Cr-lMo multipass deposited metal with varying heat inputs was investigated. Result shows that fine-grained microstructure occurs in reheated zones. The absorbed energy increases with the increase of volume fraction of fine-grained microstructure , suggesting that the volume fraction of fine-grained microstracture influences directly on impact toughness. The increasing ratio of fine-grained zone thickness to weld layer thickness is responsible for improving impact toughness after PWHT.The microstractures of 9Cr-lMo multipass deposited metal were observed. The effect of microstructure on impact toughness of 9Cr-lMo multipass deposited metal with varying heat inputs was investigated. Result shows that fine-grained microstructure occurs in reheated zones. The absorbed energy increases with the increase of volume fraction of fine-grained microstructure , suggesting that the volume fraction of fine-grained microstracture influences directly on impact toughness. The increasing ratio of fine-grained zone thickness to weld layer thickness is responsible for improving impact toughness after PWHT.

关 键 词：fine-grained microstructure TOUGHNESS 9Cr-lMo muhipass deposited metal 

分 类 号：TG142.41[一般工业技术—材料科学与工程] TG422.1[金属学及工艺—金属材料]