Abstract
The diameter and spacing of 150μm, 200μm, 300μm stripe array on the surface of 304 steel were prepared by using M-DPSS-50 semiconductor laser device. Then, nitriding treatment on the textured surface was conducted by using well type gas nitriding furnace. The chemical composition, surface morphology and surface micro-hardness were measured by X ray diffraction, optical microscope and surface micro-hardness tester. The tribological properties of the composite modified surface were tested by MRTR microcomputer control multifunctional friction and wear testing machine. The results show that an regular textured surface was obtained. The surface micro-hardness of the gas nitriding treated sample reached 444.65HV0.1, which significantly higher than the 304 stainless steel substrate surface of 222.58HV0.1. The composite modified surface has anti-friction characteristics, but the anti-wear properties are not fully reflected because of ball diameter is smaller than the width of the texture.
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