Abstract—

Electro-spark deposition (ESD) or low energy welding (LEW) technique allows the coating of metallic materials with different metal and alloys, conductive ceramics and conductive ceramic metal composites. It is also known as micro-joining process to improve the wear properties of the substrate or to obtain a more durable upper superficial coating. In this study, the surfaces of AISI 1040, AISI 4140 and AISI 5140 steels were coated with WC electrode at constant rotational speed and then characterized by a metallographic study. A homogeneous coating thickness was observed in microscopy studies and the formation of W₂C phase in the coating layer was determined in XRD analysis. Hardness of WC coated samples increased approximately 5 times. Abrasion tests were carried out by ball-on disc method with WC–Co ball at 250 m under 5N load. In the abrasion tests with WC–Co ball, the best abrasion resistance is obtained with WC coated AISI 5140 steel, while the lowest strength is obtained with uncoated AISI 4140 steel.

中文翻译：

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利用ESD技术研究WC涂层钢的磨损行为。

摘要—

电火花沉积（ESD）或低能焊接（LEW）技术允许用不同的金属和合金，导电陶瓷和导电陶瓷金属复合材料涂覆金属材料。也被称为微连接工艺，以改善基材的磨损性能或获得更耐用的上表面涂层。在这项研究中，将AISI 1040，AISI 4140和AISI 5140钢的表面以恒定转速涂覆WC电极，然后通过金相研究对其进行表征。在显微镜研究和W ₂的形成中观察到均匀的涂层厚度在XRD分析中确定涂层中的C相。WC涂层样品的硬度提高了约5倍。磨损试验是通过球盘法在5N载荷下以250 m的WC–Co球进行的。在WC-Co球的磨损测试中，使用WC涂层的AISI 5140钢可获得最佳的耐磨性，而使用未涂层的AISI 4140钢则可获得最低的强度。