9:20 AM - 9:40 AM
[17E-T9-02] Development of a Novel MPM Process
Keywords:Mixed powder PM (MPM), Granulation, Mechanical properties, Sintering parameters, Elements distribution
Coarse iron powder with a mean particle size of about 100mm used in conventional PM process has a low sintering driving force. This leads to a lower sintered density and inferior mechanical properties compared to those of MIM components. To improve the competitiveness of the traditional PM process, developing Mixed Powder PM (MPM) alloys is an effective strategy. Building upon the FL-4605 alloy from MPIF, our emphasis is on mixing MIM alloying powder with the 4605 base powder in the granulated form, and optimizing sintering parameters to enhance the mechanical properties of MPM parts. After sintering at 1320°C in vacuum, we attain a sintered density of 7.4 g/cm³, an ultimate tensile strength (UTS) of 900 MPa, an elongation exceeding 5%, and a hardness close to HRC30. With heat treatment, the mechanical properties are further improved. Electron Probe Microanalyzer (EPMA) was employed for analyzing the microstructure and the distribution of alloying elements.