稀土元素对堆焊金属组织、硬度及耐磨性的影响

THE EFFECT OF RARE-EARTHS ON HARDFACING ELECTRODE

将氟化稀土、氧化镧和混合稀土分别加入耐磨堆焊焊条药皮中，研究其对堆焊金属组织、硬度及耐磨性的影响。结果表明，适量的氟化稀土、氧化镧可以细化组织，提高堆焊层硬度和耐磨性。混合稀土也能提高堆焊层硬度，但对耐磨性影响不大。

By adding rare-earths to the coating of a hard facing electrode,the relationships betweencontents of rare-earths and properties of the hardfacing electrode are studied. The results indicate that proper contents of rare-earths can offer a better structure and increase the hardness and wear resistance of surfacing metal.