Abstract
Lately, the gear obtained from PM steels are thermally treated immediately after the process of sitering [1], in order to improve the technological properties [2], the most important of all these being the hardenability property [3]. Also thermochemical treatments have been extended [4], especially for obtaining some high wearing feature [5] of the University of Craiova [6]. Initially, carburizing and nitrocarburizing thermochemical treatments have been tested on standard compacts bearing a similar contents as the one of some gear made of PM steels used for cars, the research having the purpose to improve the wearing resistance of the supporting rondes from the gearbox of a vehicle.