Experimental Investigation of Wear Behaviour of 40MnB

Abstract

Abstract Dry sliding wear (pin-on-disc) tests were carried out under different loads and sliding speeds at room temperature for 40MnB. The present work attempts to explore wear mechanism of 40MnB. Compared with friction speed, it was found that the effect of load is more obvious. At a certain friction speed, the wear loss increase obviously with the increase of load, and the friction coefficient increases at first and then decreases slightly. Increased load leads to higher shear stress and higher interface temperature, thus cause the contact point to adhere and peeled. On the other hand, under a certain load, the friction speed has little effect on the wear rate. Surface temperature increases with the increase of friction speed, making easier plastic flow of the steel. The wear mechanism of 40MnB is adhere wear and abrasive wear.