METHODS FOR MANUFACTURING OF COBALT BORIDE COATING LAYER ON SURFACE OF STEELS BY USING A PACK CEMENTATION PROCESS

摘要

Disclosed is to a method for manufacturing a cobalt boride coating layer on the surface of iron-based metals by using a pack cementation process. In particular, the present invention relates to a method for manufacturing a cobalt boride coating layer by forming a composite coating layer on the surface of steels which is composed of an outmost layer having a composition of cobalt boride (Co₂B) and an inner layer having a composition of iron-cobalt boride ((Fe,Co)₂B). Since the cobalt boride coating layer is a compact coating layer having little defects such as pores, it can improve physical properties such as corrosion resistance, wear resistance and oxidation resistance of steels.