The Effect to Epsilon Phase on the Friction and Wear of Nitrided Die Steels (RESEARCH NOTE)

In this paper, the wear resistance and antifriction of epsilon phase layer and diffusion layer of gas nitrided D۲ steel and M۲ steel have been studied. The changes m wear mechanism of epsilon phase under the load from ۲۰N to ۲۰۰N are analysed. When the load is lighter than ۱۰۰N, it is mainly oxidizing wear on friction surface. The adhesion, peeling off and abrasive wear appear on friction surface while the load is heavier than ۱۵۰N. The epsilon phase on nitrided D۲ steel surface can reduce oxidizing wear and adhesion, and delay abrasive wear. The friction coefficient of D۲ steel can be reduced by ۱۹%, and the wear resistance can be increased ۲۰۰% to ۳۰۰% by the epsilon phase layer on nitrided surface.  

کلیدواژه ها:

Die Steel ، Nitriding ، Wear ، Antifriction