The use of metal injection molding (MIM) has grown considerably in recent years due to its capability to economically produce complex net-shaped parts in a number of engineering alloy systems. One market in which MIM has been particularly successful is medical devices. Stainless steels are the most common MIM alloys used in medical applications. However many medical applications require improved biocompatibility and MRI compatibility beyond that offered by stainless steels. In those applications Co-Cr based alloys are desirable and have been used as cast and wrought products with great success. This study will discuss the development of Co-Cr based MIM alloy systems in the compositions of ASTM F75 and F562. Topics of alloy powder and binder system selection and their effects on feedstock development will be discussed. The effects of key MIM processing variables such as debinding and sintering parameters on alloy microstructures, and mechanical properties will be evaluated.
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