The Influence of Ni Content on the Microstructure and Impact Wear Resistance Performance of High-Chromium Casting Infiltration Coating

Casting infiltration technology was used to fabricate a high-chromium coating on the surface of parent ZG45 steel with different Ni content. SEM, EDS analysis, CALPHAD-type calculations, Rockwell hardness test and impact wear were utilized investigate influence microstructure, resistance performance. The as-cast microstructure casting coatings content less than 2.82 wt.% pearlite matrix reticular eutectic M7C3 carbide, while 5.53 showed austenite. had little effect both solidification behavior amount M7C3. After heat treatment, transformation martensite occurred, significantly increased. proportion retained austenite in increased from 6.4 vol.% 27.5 increasing content, resulting decrease hardness. Due better balance toughness, 1.53 best