稀土氧化物对中高碳钢堆焊金属中夹杂物的变质作用  

Modifying Effect of Rare Earth Oxide on Inclusions in Hardfacing Metal of Medium-High Carbon Steel

作　　者：杨庆祥[1] 姚枚[1] 任学军[1] 李艳丽[1] 

机构地区：[1]燕山大学材料科学与工程学院,河北秦皇岛066004

出　　处：《焊接学报》2002年第1期41-44,共4页Transactions of The China Welding Institution

基　　金：现代焊接生产技术国家重点实验室开放基金资助项目

摘　　要：采用电镜和金相等手段 ,对加稀土氧化物和不加稀土氧化物的堆焊金属中的夹杂物进行了研究 ,结果表明 ,稀土氧化物能细化堆焊金属中的夹杂物 ,减少了尺寸大的夹杂物数量 ,使其尺寸分布在 8μm以下。同时 ,稀土氧化物能够改善夹杂物的形状 ,减少了形状系数大的长条状夹杂物数量 ,使形状系数接近为 1的夹杂物较多。稀土氧化物还能变质堆焊金属中夹杂物的属性 ,可以形成铝、硅、镧的氧化物夹杂和铝、硅、镧的硫氧化物夹杂 ,并且减少了有害的硫化锰和铝、锰。The effect of rare earth(RE) oxide on the non metallic inclusions in hardfacing metals of medium high carbon steel was investigated by means of optical and scanning electron microscopes.The results show that,by adding a certain amount of RE oxide in hardfacing metal,the number of the inclusions with large dimensions was reduced and its dimension's distribution is under 8μm,so that the inclusions can be refined.In addition,the morphology of the inclusion can be improved,so that the number of long inclusions with large shape coefficient can be decreased and that with shape coeffcient near 1 can be increased.The content of hardfacing metal can also be modified by adding RE oxide,in which the oxides with Al,Si,La and oxide sulphide with Al,Si,La can be formed,and harmful MnS and the complex inclusions with Al,Mn,Ti can be decreased.

关 键 词：稀土氧化物 夹杂物 堆焊金属 中高硫钢 

分 类 号：TG457.11[金属学及工艺—焊接] TG455