Abstract:

Reducing effect of wear and friction is an important research area in machine design. In order to reduce these effects; lubrication, heat treatments and coatings are used on machine parts. Hard coatings are used in wear intensive environments and Plasma Transferred Arc (PTA) Coating is an innovative hard coating method. PTA coatings are used in applications such as automotive valves, glass and ceramic molds and plastic extrusion dies. PTA coating properties are gained from coating powder, thus coating powder research is an important aspect. In this study microstructure and wear behavior of AISI 4140 steel surface coated by Boron Carbide was inspected. Two different mixtures was prepared, Ekabor II ™ powder that contains Boron Carbide and pure Boron Carbide was mixed with a Nickel base to produce two different coating powder recipes. Wear tests were conducted on a Ball-on-Disk device with circular geometry. Optical and Electron Microscopy was used to characterize microstructure of coating layer formed on the surface of AISI 4140.

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