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.

• 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。