The effects of carburizing on mechanical properties and wear properties of PM parts

In order to study the mechanical and triboloical properties of powder metallurgy specimens under different process parameters, theses specimens have been used in pack carburizing processes so vastly. The specimens made from industrial test pieces are carburized in a powder pack for about two to five hours at a temperature of about 850-950 °C. The effects of austenitization and quenching are investigated on some specimens. Also the wear tests are performed by means of a pin-on-disc tribotester using roll bearing steel as the conterface material. The results indicate that by appropriate selection of process parameters, it is possible to obtain high wear resistance along with moderate toughness. It is concluded that thermo mechanical surface treatments can increase the performance of PM parts in service conditions.