激光熔敷钴基稀土合金的组织与性能

在２Ｃｒ１３钢表面激光熔敷钴基稀土合金，对稀土元素的添加方式及其对敷层组织与性能的影响进行了系统研究。试验结果表明：采用Ｃｒ－Ｙ，Ｃｏ－Ｙ中间合金的方式，将稀土元素钇加入到钴基合金敷层中是可行的，且以采用Ｃｒ－Ｙ中间合金尤为适宜。钇的加入，细化了激光熔敷层的组织，提高了敷层的硬度，耐磨性及抗高温氧化性能。

STUDY ON MICROSTRUCTURE AND PROPERTIES OF LASER CLADDING Co-BASE RARE EARTH ALLOY

The methods of adding rare-earth element to create Co-base rare-earth alloy laser cladding on the surface of 2Cr13 substrate and their effects on the microstructure and properties of laser cladding obtained have been investigated systematically. The experimental results indicated that it was feasible to add rare-earth element into Co-base alloy cladding layer by introducing Cr-Y and Co-Y intermediate alloys and that the Cr-Y intermediate alloy was more suitable. The addition of Y made the microstructure of laser cladding layer fine, thus improved its hardness and wear resistance as well as its high temperature oxidation resistance.