Abstract
The effect of powder characteristics on the mechanical properties of martensitic stainless steel fabricated by MIM was investigated. The specimens were made by injecting the mixture of water atomized or gas atomized powder and a polymer binder into a metallic mold. The compacts were debound in air at a temperature between 533K and 593K for 7.2ks. They were sintered in vacuum at 1573K and 1623K for 7.2ks. The carbon content of the sintered compacts decreased linearly with increasing in debinding temperature. This means that the debinding temperature can control the carbon content of sintered compacts accurately. The tensile strength of the sintered compact of the WA powder decreased as the debinding temperature rises. On the other hand, the tensile strength of the sintered compact of the GA powder increased as the debinding temperature rises.
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