Abstract

Single- and double-layer coatings on 40Cr steel substrates have been obtained by electrospark alloying (ESA) and a combination of ESA technology and pulsed cathodic arc evaporation (PCAE) using TiCNiCr and TiCNiCr–Dy₂O₃ electrodes. The electrodes are obtained by powder metallurgy. The structure and elemental and phase composition of the electrodes and coatings are studied using scanning electron microscopy, energy dispersive spectroscopy, and X-ray phase analysis. The tribological properties of the coatings are determined as a result of tests according to the pin-on-disk scheme in contact with the Al₂O₃ counterbody at loads of 1, 5, and 10 N. The temperature during the tests is T = 20°C. The potential and current density of corrosion are determined using a three-electrode cell with a VoltaLab 50 potentiostat. The results show that the electrodes consist of TiC grains of 12 μm; a solid solution of Ni in Cr; and, in the case of a doped electrode, Dy₂O₃ up to 5 μm in size. ESA coatings have a low-defect fine-grained structure consisting of regions of a solid solution of Ni and Cr in Fe and titanium carbide grains with a maximum size of 0.3 μm. Coatings with the addition of Dy₂O₃ have a lower coefficient of friction at loads of 1, 5, and 10 N. All coatings in 1 N H₂SO₄ are in a stable passive state and have high corrosion resistance: the corrosion current density of the coatings is at least 4 times lower than the values obtained for a 40Cr steel substrate.

中文翻译：

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使用TiCNiCr和TiCNiCr-Dy 2 O 3电极通过电火花合金化，脉冲阴极电弧蒸发和混合技术获得的涂层的摩擦学特性和耐蚀性

摘要

通过电火花合金化（ESA）以及ESA技术与TiCNiCr和TiCNiCr–Dy ₂ O ₃电极的脉冲阴极电弧蒸发（PCAE）的结合，可以在40Cr钢基材上获得单层和双层涂层。电极通过粉末冶金获得。使用扫描电子显微镜，能量色散谱和X射线相分析研究了电极和涂层的结构，元素和相组成。涂层的摩擦学性能是根据按钉盘方法与负载为1、5和10 N的Al ₂ O ₃配体接触的销钉盘测试方法确定的。测试期间的温度为T= 20°C。使用带有VoltaLab 50恒电位仪的三电极电池确定腐蚀的电位和电流密度。结果表明，电极由12μm的TiC晶粒组成；Ni在Cr中的固溶体；在掺杂电极的情况下，Dy ₂ O ₃的尺寸最大为5μm。ESA涂层具有低缺陷的细晶粒结构，该结构由Ni和Cr在Fe和碳化钛晶粒中的固溶区域组成，最大尺寸为0.3μm。添加了Dy ₂ O _3的涂层在1、5和10 N的载荷下具有较低的摩擦系数。所有涂层均在1 NH ₂ SO _4中 处于稳定的被动状态并具有较高的耐腐蚀性：涂层的腐蚀电流密度至少比40Cr钢基材的腐蚀电流密度低4倍。