Tribological Properties of Fe-based Sintered Materials with Wide-bond Laser Quenching

Microstructure and tribological properties of two Febased sintered materials after widebond laser surface hardening were studied. The results indicated that using laser surface hardening could remarkably improve the wear resistance of Febased sintered materials. Comparing the two materials, under the lower loads, the material with twinned martensite/dislocation martensite microstructure showed the better tribological properties; however, under the higher loads, the material with martensite/bainite duplex microstructure showed excellent wear resistance owing to good combination of strength and toughness.