ABSTRACT The present work aims at investigating the collective function of thermo-reactive diffusion (TRD) and plasma-nitriding duplex coating (vanadium carbide (VC) and vanadium nitride (VC-VN)) on the wear resistance of AISI M2 axial-forming mandrel. TRD process was carried out in molten salt bath furnace at 1020 ± 25°C for 5–6 h and the samples were subjected to vacuum heat treatment process at 1150°C, followed by plasma-nitriding for 1 h at 550°C. Wear properties were examined by subjecting the VC and VC–VN-coated samples to wear test (pin on disc) at normal and elevated temperature (50° and 150°C) with lubrication. Phase composition, surface morphology and elemental mapping were studied through X-ray diffractometer, SEM and EDS analyses, respectively. Study found that the wear resistance of VC-coated samples was higher than VC–VN-coated samples and wear mechanisms for VC and VC–VN coated specimens were assessed to be abrasive and abrasive-oxidative in nature, respectively.

中文翻译：

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双相涂层（VC-VN）对成型芯棒的影响以获得更好的耐磨性

摘要 本工作旨在研究热反应扩散 (TRD) 和等离子氮化双相涂层（碳化钒 (VC) 和氮化钒 (VC-VN)）对 AISI M2 轴向成型芯轴的耐磨性的集体作用. TRD 工艺在熔盐浴炉中在 1020±25°C 下进行 5-6 小时，样品在 1150°C 下进行真空热处理，然后在 550°C 下进行等离子氮化 1 小时。通过在正常和高温（50° 和 150°C）下对 VC 和 VC-VN 涂层样品进行磨损测试（销钉在盘上）来检查磨损性能。分别通过 X 射线衍射仪、SEM 和 EDS 分析研究了相组成、表面形貌和元素分布。