Shape retention of injection molded stainless steel compacts^①

来源期刊：中南大学学报(英文版)2005年第2期

论文作者：李益民 K．A．Khalil 黄伯云

文章页码：107 - 112

Key words：injection molding; shape retention; stainless steel

Abstract: The effects of the binder composition, the powder loading, the thermal properties of feedstocks, and the injection molding parameters on the compact shape retention for metal injection molding 17-4PH stainless steel were investigated. The high-density polyethylene is more effective than ethylene vinyl acetate as a second component of the wax-based binder to retain compact shape due to its higher pyrolytic temperature and less heat of fusion. The compact distortion decreases with increasing the powder loading, molding pressure and molding temperature. There exists an optimal process combination including the powder loading of 68%, molding pressure of 120 MPa and molding temperature of 150℃. Under this process condition, the percentage of distorted compacts is the lowest.