镧钇稀土元素对镍铁型铸铁焊缝石墨化的影响  

The Effects of Rare Earth Elements on the Graphitization of Ni Fe Cast Iron Weld Metal

作　　者：戴元淑[1] 童彦刚[1] 彭高峨[1] 周中玉[1] 凌泽民[1] 

机构地区：[1]重庆大学机械工程学院,重庆400044

出　　处：《重庆大学学报（自然科学版）》2000年第2期42-44,共3页Journal of Chongqing University

摘　　要：在试验的基础上 ,探讨了镧基轻稀土、钇基重稀土对镍铁型铸铁焊缝的石墨化及石墨形态的影响。结果显示 ,镧具有较强的石墨化效果 ,能减少或消除焊缝组织中的晶间共晶组织 ,所获焊缝硬度较低 ;钇基重稀土具有较弱的石墨化效果和较强的石墨球化效果 ,所获石墨球细小均匀 ,但易形成晶间共晶组织 ,使焊缝硬度增高。The effects of rare earth elements La and Y on the graphitization of Ni Fe cast iron weld metal are studied.It is shown that the La contained welds are well graphitized whilst the Y contained welds are moderately graphitized.The results are favourably explained by a “bubbling” theory. [WT5HZ]

关 键 词：稀土元素 石墨化 焊缝 镧 钇 镍铁型铸铁 石墨化 

分 类 号：TG441.3[金属学及工艺—焊接] TG457.12