In the present study, multilayered Cr–N/Cr–Al–N coatings were prepared by cathodic arc physical vapor deposition (PVD) with different numbers of layers and the same total thickness on AISI 630 steel in an attempt to improve the wear and erosion–corrosion resistance. Structural analysis of the coatings was performed by field scanning electron microscopy, X‐ray diffraction (XRD), and energy‐dispersive spectroscopy. Depth profiles and roughness parameters of worn surfaces were calculated after erosion and wear tests. XRD indicated that nitride compounds were formed in multilayer coatings by PVD. The Cr–N/Cr–Al–N coating exhibited superior corrosion resistance compared with AISI 630 substrate. The erosion–corrosion results revealed that the smoothest wear track with the minimum erosion rate and wear depth was obtained for five‐ and seven‐layered coatings. The failure mechanism of the bare substrate was influenced by plastic deformation via cutting and plowing, while the failure mechanism for coated samples was chipping and delamination. According to the wear results, the multilayer coatings showed a lower friction coefficient and better surface morphology that demonstrated their high ability for wear protection.

中文翻译：

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层数对AISI 630不锈钢上多层Cr–N / Cr–Al–N涂层的腐蚀，腐蚀和耐磨性的影响

在本研究中，通过在AISI 630钢上进行阴极电弧物理气相沉积（PVD）制备具有不同层数和相同总厚度的多层Cr–N / Cr–Al–N涂层，以试图改善磨损和腐蚀-耐腐蚀性能。涂层的结构分析是通过场扫描电子显微镜，X射线衍射（XRD）和能量分散光谱进行的。经过腐蚀和磨损测试后，计算出磨损表面的深度轮廓和粗糙度参数。XRD表明通过PVD在多层涂层中形成了氮化物。与AISI 630基材相比，Cr-N / Cr-Al-N涂层具有优异的耐腐蚀性。腐蚀-腐蚀结果表明，五层和七层涂层获得了最小的腐蚀速率和最小磨损深度的最平滑的磨损轨迹。裸露基材的破坏机理受切割和耕作的塑性变形影响，而涂层样品的破坏机理则是崩裂和分层。根据磨损结果，多层涂层显示出较低的摩擦系数和较好的表面形态，这表明它们具有很高的耐磨性。