Effect of Cr3C2 Content on the Microstructure and Wear Resistance of Fe3Al/Cr3C2 Composites

In this paper, an engine piston ring coating comprising composite material of Fe3Al and Cr3C2 mixed powder was prepared by laser cladding onto carbon structural steel. The microstructure tribological properties the materials were investigated through X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission (TEM), wear tests. influence mechanism content in studied. During process wear, soft Fe3Al/Fe2AlCr matrix is first ground off, hard Cr7C3 phase initially supports abrasive surface before being worn away into particles, resulting wear. With increase content, hardness layer increases, proportion morphology changes from a sparse network to dense floccule. Of layers with different 15 wt.% had lowest friction coefficient, 25 rate. low rate can be attributed fact that adhesive does not easily occur fine strengthening phase, which facilitates better separation grinding surfaces.