Cailiao Baohu (Nov 2023)
Study on Laser Quenching and Plasma Nitriding Compound Process of H13 Steel
Abstract
In order to improve the surface properties of hot work mold steel, the influence and mechanism of laser quenching, plasma nitriding and laser quenching/plasma nitriding composite treatment process on the friction, wear and corrosion resistance of the modified layer of H13 steel were studied. The surface morphology, surface chemical composition and microstructure of samples with different heat-treated were characterized by optical microscope, scanning electron microscope and energy dispersive spectrometer. Results showed that the composite treatment process could significantly improve the friction and wear resistance of the modified layer, and improve the corrosion resistance of the material surface. Compared with the single laser quenching and single nitriding treatment, the average friction coefficient of the modified layer after composite treatment declined significantly, the self-corrosion potential was remarkably increased, which indicated that the wear resistance and corrosion resistance of the modified layer after composite treatment were improved dramatically.
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