[T9] Innovative Technology

[17E-T9-02] Development of a Novel Mixed-Powder Powder Metallurgy (MPM) Process

H. Wang¹, *T. Yang², Y. Fan³, G. Shu^1,2 (1.Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taiwan, 2.Institute of Mineral Resources Engineering, National Taipei University of Technology, Taiwan, 3.United Powder Technologies (UPT) Co., Ltd., Taiwan)

Keywords:Mixed-Powder Powder Metallurgy (MPM), Granulation, Sintering Parameter, Microstructure, Mechanical Properties

In the traditional powder metallurgy (PM) process, coarse metal powders (mean size ~100 μm) form large pores in the green compact and result in low sintering density. To address this, we developed a Mixed-Powder Powder Metallurgy (MPM) process, adding fine powders to coarse ones. Optimization of granulation yielded nearly spherical powders with good fluidity and low friction, allowing for green compacts with ~90% density. Sintering at 1325°C for 3 hours in a 95% argon and 5% hydrogen atmosphere achieved a sintered density of 95%, hardness of HRC 26, tensile strength of 935 MPa, and 4.2% elongation. The MPM process enhances sintered density and mechanical properties, providing a cost-effective competitive advantage in PM applications.