摘要
采用金相、扫描电镜(SEM)和能谱仪、X射线衍射仪以及硬度计对不同合金成分堆焊金属进行组织观察和性能测试,研究了冷剪刃堆焊焊条合金成分对其堆焊金属组织和性能的影响。结果表明,冷剪刃堆焊焊条堆焊金属的硬度随焊条药皮含碳量的增加而增加;药皮应加入适量金属钼以提高堆焊焊条的抗回火能力,含有金属钼的堆焊金属经550℃左右二次回火后残余奥氏体的含量降到了1%左右,硬度达到最高(58.6 HRC)。
The microstructure of hardfacing metal was observed and its property was measured by transformation recording-measuring instrument,optical-micrograph,X-ray diffractometer,X-ray stress analyzer and hardness instrument,The results show that the hardness of hardfacing metals are increased with the increasing of carbon content.The tempering resistance of covered electrodes can be improved by adding Mo in the coating.After the specimen was tempered at 550 ℃ for two times,in the retained austenite with hardfacing metals content of Mo is 1.1%,and the hardness is the highest(58.6 HRC).
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2007年第2期25-28,共4页
Transactions of The China Welding Institution
基金
河北省科技攻关项目(04212201D)
河北省博士基金资助项目(B2002222)
关键词
冷剪刃
堆焊
残余奥氏体
cold scissors
hardfacing
retained austenite
