Effects of Plasma Nitriding on Low Temperature Salt-Bath Chromizing of W18Cr4V Steel
Effects of plasma nitriding on low temperature salt-bath chromizing of W18Cr4V steel is studied .The chromizing process is investigated by means of optical microscopy(OM), scanning electron microscopy(SEM), X-ray diffraction (XRD). Results show that the specimens are chromized successfully by low temperature salt-bath subjected to plasma nitriding. A chromized layer with average 3.3μm in thickness and 1200HV-1300HV in microhardness is formed on the substrate by chromizing at 610°C for 6h. XRD analysis show that the chromized layer is composed of Cr23C6, CrN, Cr/Fe, (Cr, Fe)7C3 , (Cr, Fe)2N and the surface chromium concentration reaches 77.67%.
J. L. Ye and F. Ye, "Effects of Plasma Nitriding on Low Temperature Salt-Bath Chromizing of W18Cr4V Steel", Advanced Materials Research, Vol. 213, pp. 543-547, 2011