高强钢焊条熔敷金属与对接接头冲击韧性差异分析  

Analysis on Impact Toughness Difference between Butt Weld Metal and Deposited Metal

作　　者：何亮[1] 牛继承[1] 张玉祥[1] HE Liang;NIU Jicheng;ZHANG Yuxiang(Luoyang Ship Material Research Institute,Luoyang 471023,China)

机构地区：[1]中国船舶重工集团公司第七二五研究所,河南洛阳471023

出　　处：《材料开发与应用》2020年第4期86-90,共5页Development and Application of Materials

摘　　要：通过化学成分分析、焊道分布及缺口位置分析、显微组织观察等手段,对自制焊条熔敷金属与对接接头的冲击韧性差异的原因进行分析,结果表明:由于母材熔合比不同,熔敷金属与对接接头根部焊缝金属化学成分不同,同时对接接头根部焊缝受再热中温回火作用显著,造成对接接头根部焊缝与熔敷金属的显微组织具有明显差异,从而导致两者冲击韧性的差异;由于熔敷金属与对接接头焊缝的焊道布置不同,先焊焊道受后续焊道再热作用效果不同,形成不同的组织分布特征,从而导致两者冲击韧性的差异.By means of chemical composition analysis,bead distribution and gap position analysis and microstructure observation and other means,the causes of impact toughness difference between deposited metal of self-made electrode and butt weld were analyzed.The results show that the different fusion ratio of the base material,the differences between the chemical compositions of the deposited metal and the butt joint root weld and the significant effects of reheating and tempering on butt joint root weld result in the obvious differences between the microstructures of the butt joint root weld and the deposited metal and the difference in impact toughness,and that because the weld bead layouts of deposited metal and butt joint weld are different,and the reheat effect of the first weld bead subjected to the subsequent weld bead is different,different organizational distribution characteristics is formed,which is the cause of difference of the impact toughness.

关 键 词：熔敷金属 对接焊缝 焊道布置 冲击韧性 显微组织 

分 类 号：TG111.5[金属学及工艺—物理冶金]