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Investigation on Wear Behavior of Steels Coated with WC by ESD Technique

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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.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, Faculty of Technology, Afyon Kocatepe University, 03200, Afyon, Turkey

    Yusuf Kayali &  Şükrü Talaş

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  1. Yusuf Kayali
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  2. Şükrü Talaş
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Correspondence to Yusuf Kayali.

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Yusuf Kayali, Şükrü Talaş Investigation on Wear Behavior of Steels Coated with WC by ESD Technique. Prot Met Phys Chem Surf 57, 106–112 (2021). https://doi.org/10.1134/S2070205120060131

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  • DOI: https://doi.org/10.1134/S2070205120060131

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