TRIBOLOGICAL PROPERTIES OF COCRFEW ALLOY UNDER SEAWATER CONDITION (MT)

In this study, CoCrFe-based alloys reinforced by W（0 wt%, 4 wt%, 8 wt% and 12 wt%） were prepared by powder metallurgy, and the tribological properties of the alloys under seawater environment were systematically studied. The friction and wear behavior of the alloy under different loads and sliding speeds in seawater was studied using a reciprocating ball-on-disk friction and wear tester sliding against with GCr15 steel ball; X-ray diffractometer, scanning electron microscope and energy dispersive x-ray analyzer were used to analyze the phase composition and wear mechanisms of the alloys. The results show that the CoCrFeW alloy is composed of ε（hcp）, γ（fcc）, Fe-Cr and Cr2O3 phases. The alloy structure was compact, and the hardness and density increased with the increase of W content. Generally speaking, the friction coefficients of the alloy showed a decreasing trend with the increase of sliding speed and load, and increased first and then decreased with the increase of W content under high-speed conditions. U