【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、钛复合夹杂物在堆焊金属中的存在更多还原

【Abstract】 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.更多还原