Wear is a variety of mechanical parts in the working process of one of the main failure forms. Statistics show that in the failure of mechanical parts, about 75% ~ 80% belongs to metal wear, provide machine is about 30% ~ 40% of energy consumption on the friction and wear in the process, and most of the failure phenomena occurred in the material surface, and take various means to improve the surface performance of materials, to enhance the safety and reliability of the parts or to extend the service life is very effective. Cemented carbide as a set of high hardness and toughness is higher than the one of a material, industry often apply it to require the surface damage resistance and abrasion resistance of high places, however The whole of the workpiece using hard alloy will greatly increase the cost, and the requirements of higher than its hardness of the tool, limiting its range of application.

If we can, therefore, in the preparation of low carbon steel surface layer of the cheap kind of tungsten carbide spray coating, make its have the cemented carbide surface performance, in order to improve the service life of the under some special conditions, can reduce the cost, and will be of great technical value and economic significance and broad application prospects. The preparation and properties of WC cemented carbide coating is cemented carbide and hot hardness is the highest, and Co, N I, Fe of metals such as good wettability, especially cobalt. When the temperature rises to more than metal melting, WC can dissolve in the metallic melts.

Introduction arc spraying is a process in which molten metal wire is atomized by high-speed air stream and sprayed onto the surface of workpiece to form a coating by using arc as heat source. Powder composite arc spraying technology is developed on the basis of arc spraying. It is a process of melting wires by arc and adding alloy ceramic powder to the metal surface at high speed to obtain the composite tungsten carbide spray coating with high wear resistance and corrosion resistance. This method can be used for the parts and components made of carbon steel, alloy steel, cast iron, etc. The method can also be used for surface repair of some worn parts or corroded parts. In recent years, arc spraying technology develops rapidly and is widely used in various fields of industry. In this paper, the microstructure of powder composite arc spraying coating and common arc spraying coating are analyzed, the microhardness of coating and substrate are tested, and the wear resistance of the two coatings is compared.

Related link:

http://www.wococarbide.com/Transaction/en_information.html

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