The Effect of Hot Forming–Quenching Integrated Process Conditions on Friction and Wear Behavior for AA7075 Alloy.

In this paper, the effect of ambient temperature, sliding speed and normal load on friction coefficient and wear mechanism were investigated through end-face testing to simulate the influence of process parameters during hot forming–quenching integrated process. With the increasing ambient temperature, the wear mechanism changes from abrasive wear to adhesive wear and oxidation wear. When the ambient temperature reaches 400 °C, the delamination wear characteristics occur due to the crack propagation caused by thermal stress. The friction coefficient and wear rate increase with the increase in the normal load. When the normal load is 1.8 and 3 kN, because of the generation of a large amount of heat and the increase in the contact area, the peeling morphology appears, and the adhesive wear and oxidation wear are further enhanced with the increase in the temperature. The enhancement of work hardening weakened the adhesion effect due to the high sliding speed. The friction coefficient decreases with the increase in the sliding speed. In addition, the wear rate at 10 r/min and 50 r/min sliding speed are 29.6 and 29.2 mm³/m, respectively. [ABSTRACT FROM AUTHOR]