Development and improvement of production process of MIM rocker arm

Abstract

In this article, 17-4PH metal powder was used as raw material to study the effects of the injection position and MIM (metal powder injection molding) thermal debinding temperature on the rocker arm. By simulation, it was found that different injection schemes have obvious effects on the filling time, density, blowhole, and injection stress of parts. In addition, when the termination temperature of the thermal debinding was 820 °C, the presintering effect could be achieved. When the intermediate process temperature was 450 °C, the polyethylene component remained in the sample. According to the TG and DSC curves of the solvent debinding feedstock, it was effective to avoid the occurrence of the residue binder when the intermediate process temperature increased to 500 °C.