PROCESSING OF MIM Co-28Cr-6Mo

摘要

A prealloyed Co-28Cr-6Mo powder is injection molded. Debinding and sintering are conducted in different atmospheres to evaluate their effects on the sintering response and carbon, nitrogen, and oxygen contents. Hardness, tensile strengths, and ductility are measured after hot isostatic pressing and solution heat treating. The results are correlated to the interstitial content and microstructure. Nitrogen in the sintering atmosphere increases the yield strength and hardness. The mechanical properties exceed the requirements for cast material and are comparable to those of wrought material.