含稀土氧化物的WC-TiC-TaC-Co/CuZnNi复合耐磨堆焊材料  

Composite hardfacing material WC-TiC-TaC-Co/CuZnNi with rare earth oxide

作　　者：王新洪[1] 邹增大[1] 张敏[2] 曲仕尧[1] 

机构地区：[1]山东大学材料科学与工程学院,山东济南250061 [2]山东大学机械学院,山东济南250061

出　　处：《材料科学与工艺》2003年第3期288-292,共5页Materials Science and Technology

基　　金：山东省自然科学基金资助项目(Z2000F02).

摘　　要：以WC-TiC-TaC-Co硬质合金、CuZnNi及氧化物La2O3为原料,研制出一种具有高耐磨性和良好抗冲击性能的堆焊材料,利用SEM、TEM、摩擦磨损试验分析了堆焊材料的组织及耐磨性,探讨了稀土氧化物对堆焊材料组织性能的影响.研究结果表明:硬质合金与Cu基合金通过元素扩散形成连接界面;堆焊层耐磨性随硬质合金含量的增加而增加,随载荷的增加而降低;加入La2O3后,基体组织细化,硬质合金与基体的界面上形成微晶过渡区,改善了界面结合强度,堆焊层耐磨性得到提高.Rare earth oxide of La2O3 was added into composite hardfacing material WC-TiC-TaC-Co/CuZnNi and the microstructure and tribology properties of the composite hardfacing material were investigated by SEM, TEM, wear test to study the effect of La2O3 on the microstructure and properties of hardfacing materials. The results of researches indicated that the interface between cemented carbide and matrix metal is formed through by element diffusion; the wear resistance of hardfacing layer increases with the increase in cermet content and decreases with the increase of load; the microstructure of matrix metal is further refined by adding rare earth oxide so that a polycrystalline interface structure is formed between the cerment and the matrix, and the wear resistance of composite hard facing material is obviously inproved.

关 键 词：稀土氧化物 WC-TiC-TaC-Co/CuZnNi 复合耐磨堆焊材料 耐磨性 合金 微晶过渡区 

分 类 号：TG455[金属学及工艺—焊接]