| Abstract [eng] |
Wear of machinery elements are general problems in engineering applications. The various surface coating techniques are enhanced to improve the wear resistance of the elements. There are many surface coating technologies, such as plasma spraying, thermal spraying, hard facing, laser cladding, chemical and physical vapor deposition processes. Hard facing technique is used for surfacing. Surfaced coatings are made of different composition to reduce the wear rate of metals for the machining process. In this research project, we have used the mixture of composition for coatings. The tungsten carbide as hard metal and cast iron chips are collected and used for the scrap materials. The selection of cast iron waste helps to improve the carbide content for increasing the mechanical strength. For high deposition of this mixture, we have used submerged arc welding as economical welding. The silicon carbide and silicon oxide are prepared by us and used as a flux for welding to improve the chemical composition of material. The plain carbon steel is used as base metal for surfacing. After the welding process, testing of hardness are done before and after tempering at 500 °C,550 °C and 600 °C for improving the toughness, weight loss of coatings to calculate wear and optimized the microstructure of the coatings. These results are compared with others research results and the waste materials are utilized in this composition to analyze the mechanical properties of the coatings. |
