Mechanical Properties and Carbon Control of Cr-Mo Alloy Steel by Injection Molding

Abstract

The effects of C addition and debinding temperature on sintering behavior of Cr-Mo steel compacts shaped by metal injection molding were investigated to carry out the control of C content of sintered compacts. The specimens were made of SCM415 steel powder and additional C powder with polyamide binder. The compacts were debound in air at various temperatures and were sintered in argon gas at 1623K for 7.2ks. The obtained results showed that the reaction M_xO+C→xM+CO (M=Metal element) is dominant for reducing oxides during sintering process and the excess or shortage of C reducing oxides in compact determines the C content which strongly affects the density and mechanical properties of sintered compacts.