This study presents the plasma nitriding of Cr–Mo–V tool steel to protect it from environmental degradation. The steel samples after metallographic polishing were nitrided in the glow discharge plasma of N₂ and H₂ gas mixture (80:20). Nitriding was performed at two different temperatures, a lower temperature of 450 °C and the higher temperature of 500 °C. The potentiodynamic polarization tests in 3.5% NaCl electrolyte had shown the enhancement of corrosion resistance of steels after nitriding. X-ray diffraction (XRD) studies and scanning electron microscopic analysis coupled with energy dispersive spectroscopic analysis (SEM/EDS) was performed to understand the modification of surface microstructure. XRD analysis of the nitrided steels revealed the presence of γ′- and ε-nitrides of iron, which were responsible for the improvement of corrosion resistance.

这项研究提出了Cr-Mo-V工具钢的等离子渗氮处理，以保护其免受环境破坏。金相抛光后的钢样品在N ₂和H ₂的辉光放电等离子体中氮化混合气体（80:20）。在两个不同的温度下进行氮化，较低的温度为450°C，较高的温度为500°C。在3.5％NaCl电解液中进行的电位动力学极化试验表明，氮化后钢的耐腐蚀性增强。进行了X射线衍射（XRD）研究和扫描电子显微镜分析以及能量色散光谱分析（SEM / EDS），以了解表面微观结构的变化。对氮化钢的XRD分析表明，存在铁的γ'和ε氮化物，这有助于提高耐蚀性。