高强度焊条熔敷金属合金系研究  

Research on Deposited Metal Alloy Series of High-Strength SMAW Electrode

作　　者：张京海[1] 方大鹏[1] 

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》2012年第1期25-28,共4页Development and Application of Materials

摘　　要：对MnNiCrMo和7%NiMo合金系的高强度焊条熔敷金属进行了试验研究。结果显示,MnNiCrMo系可在0.05%-0.07%碳含量条件下获得屈服强度大于900MPa的高强度焊缝金属,Akv-50℃40-60J,焊缝屈强比0.93-0.98,强度稳定;7%NiMo合金系可在≤0.05%碳含量条件下获得屈服强度大于900MPa的高强度焊缝金属,Akv-50℃50-80J,焊缝屈强比0.92-0.94,焊缝金属塑性较差。从焊缝金属组织类型、残余奥氏体含量等角度分析了其原因,为高焊条熔敷金属合金系的优化选择提供了必要的基础。Deposited metal of high-strength SMAW electrode of MnNiMo and 7%NiMo alloy series were investigated.The results indicate that high-strength weld metal from MnNiCrMo series electrodes were obtained on condition of 0.05%-0.07% carbon content with yield strength exceeding 900MPa,toughness Akv-50℃ 40-60J and yield ratio 0.93-0.98.The strength was stable.High-strength weld metal from 7%NiMo series electrodes were obtained at the condition of carbon content below 0.05% with yield strength exceeding 900MPa,toughness Akv-50℃ 50-80J and yield ratio 0.92~0.94,while the plasticity of the weld metal was poor.The weld metallurgical microstructure and residual austenite content were analyzed,which provided necessary foundation for optimizing deposited metal alloy series of high-strength SMAW electrode.

关 键 词：高强度焊条 组织 强度 韧性 

分 类 号：TG457[金属学及工艺—焊接]