Abstract Powder metallurgy Vanadis 10 has an extensive range of applications as dies for extrusion and cold drawing. The tool surface is exposed to different requests (mechanical, chemical and tribological) and demands surface treatments to prolong its life. Few studies investigate the surface modification to optimize the tribological behavior of Vanadis 10. In this study, the combination of cryogenic treatment, two conditions of pulsed plasma nitriding and multilayer TiCN/AlTiN/CrAlTiN/CrN film deposition were evaluated. Pin-on-disc sliding tests were carried out at 0.1 m/s sliding speed, applied load of 10 N and sliding distance of 1000 m. The average hardness of all experimental conditions with multilayer film (2000 HV0.1) was approximately 2 times greater than the hardness of sub-zero treated Vanadis 10 (964 HV0.1). Plasma nitriding promoted the formation of Fe3N-e compound layer in both experimental conditions. Cracks were observed in this layer. Duplex treatment does not guarantee satisfactory substrate-coating adhesion, because it depends on plasma nitriding conditions. Cryogenic treatment samples followed by plasma nitriding at 5% N2, 75% H2 and 20% Ar, presented higher dry sliding wear resistance in all tested conditions. This treatment is recommended for applications where Vanadis 10 requires high resistance to dry sliding wear.

中文翻译：

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Vanadis 10冷作工具钢双相涂层的摩擦学行为

摘要 粉末冶金 Vanadis 10 作为挤压和冷拔模具具有广泛的应用。工具表面受到不同的要求（机械、化学和摩擦），需要进行表面处理以延长其使用寿命。很少有研究调查表面改性以优化 Vanadis 10 的摩擦学行为。在这项研究中，评估了低温处理、脉冲等离子体渗氮和多层 TiCN/AlTiN/CrAlTiN/CrN 膜沉积两种条件的组合。以 0.1 m/s 的滑动速度、10 N 的施加载荷和 1000 m 的滑动距离进行销-盘滑动试验。具有多层膜的所有实验条件的平均硬度 (2000 HV0.1) 比零度处理的 Vanadis 10 (964 HV0.1) 的硬度大约 2 倍。在两种实验条件下，等离子氮化均促进了 Fe3N-e 化合物层的形成。在该层中观察到裂纹。双重处理不能保证令人满意的基材涂层附着力，因为它取决于等离子体渗氮条件。低温处理样品，然后在 5% N2、75% H2 和 20% Ar 下进行等离子渗氮，在所有测试条件下都表现出更高的干滑动耐磨性。这种处理推荐用于 Vanadis 10 需要高抗干滑动磨损的应用。在所有测试条件下表现出更高的干滑动耐磨性。这种处理推荐用于 Vanadis 10 需要高抗干滑动磨损的应用。在所有测试条件下表现出更高的干滑动耐磨性。这种处理推荐用于 Vanadis 10 需要高抗干滑动磨损的应用。