Fabrication of sintered Co-Cr-W-C alloy by metal injection molding

摘要

Metal injection molding (MIM) process has an advantage of fabricating three dimensional complexshaped components, which alleviates the need for secondary working operations. Therefore, MIMprocess is hoped to be a suitable production route for the hard materials such as cemented carbides.This study has been performed to determine the production feasibility of sintered Co-Cr-W-C alloysby MIM process, and the mechanical properties and microstructures. The results obtained were asfollows:(1) An adequate carbon level of the alloy was achieved by solvent debinding followed by finalthermal debinding in H{sub}2 and N{sub}2 gas mixtures atmosphere.(2) Injection molded alloys showed the same microstructure and mechanical properties as those ofconventional P/M alloys.