Influence of the Gas Environment on the Transfered Film of the Tribologic Brass (CuZn)/XC48 Steel COUPLE

M. Amirat; M. Sawalem; H. Zaïdi

doi:10.4028/www.scientific.net/AMM.367.32

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 367Influence of the Gas Environment on the Transfered...

Influence of the Gas Environment on the Transfered Film of the Tribologic Brass (CuZn)/XC48 Steel COUPLE

Abstract:

This paper reports on the influence of environment gas on the brass film and tribological behavior of brass (Cu64Zn36) / steel (AISI 1045) couple. The friction coefficient and the wear rate of brass/steel were measured in ambient air, in pure oxygen at 105 Pa and in vacuum at 5x10-5 Pa. In this study, the mechanism of transfer brass film on steel substrate has been studied with the scanning electronic microscope, the optical microscope and the interferential microscope. The analysis shows that the transfer films properties (roughness, hardness, thickness) depend on the atmospheric conditions. The brass film has an ellipsoidal surface in air and in oxygen with two differents thickness. However, in vacuum, the transfer film produced by a discontinuous adhered particles on the disc. The largest wear rate is obtained when using pur oxygen and the largest friction coefficient µ was measured in ambient air. The smallest friction coefficient and wear rate are obtained in vacuum. The results also showed that the granular film produced in vacuum has a good effect on tribological behavior of brass/steel couple.