Copper-infiltrated/Sintered Iron-based Alloy with High Content of Carbonand Alloying Elements Used for Valve-Seats
Cheng Lili; Dong Yi(Material Science and Engineering School， UST Beijing，Beijing 100083，China)
The influence of different alloying elements and heat-treatment on the density andmechanical properties of the copper-infiltrated/sintered iron-based alloy was investigated. Theiron-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 relativedensity of 98.2%)， hardness of HRc 45.2 and TRS of 1 124 MPa. After quenching at 900℃ andhigh-temperature at 580℃， with large amount of martensite in the microstructure the material possesses the hardness of over HRc 40.
【CateGory Index】： TG143