Copper-infiltrated/Sintered Iron-based Alloy with High Content of Carbonand Alloying Elements Used for Valve-Seats

The influence of different alloying elements and heat-treatment on the density and mechanical properties of the copper-infiltrated/sintered iron-based alloy was investigated. The iron-based alloy blank with high content of carbon and alloying elements was developed by mechanical mixing. After copper-infiltration/sintering, the material has the density of 7. 88 g/cm³ (the relative density of 98.2%), hardness of HRc 45.2 and TRS of 1 124 MPa. After quenching at 900℃ and high-temperature at 580℃, with large amount of martensite in the microstructure the material possesses the hardness of over HRc 40.