Comparative Analysis of Wear and Corrosion Attack Resistance of Bimetal Steel-Copper Products Manufactured by Plasma-Jet Hard-Facing with Direct and Reversed Polarity Current

The development of modern industry is aimed at reducing the consumption of materials, improving the technological properties of products. The products made of expensive metals and scarce alloys should be produced as combined, with the base consisting of the cheapest materials, and on the working surface of fusing alloys with special properties. Such bimetallic structure is many times cheaper than structures made entirely of metal with the desired properties. The use of highly concentrated heat sources works to simplify the manufacture of such structures. The study of the technological possibilities of manufacturing laminates plasma arc of direct action of reverse polarity has been conducted. This paper presents the results of a study of corrosion resistance and wear resistance of composite metals received plasma welding torch when working on reverse polarity. The basis of the item was a composition of bimetal copper-steel, the welding was carried out in various modes of operation of the plasma torch. The results of the study into laminate structure of the composite material were compared to the results of light microscopy. The results of research of corrosion resistance and wear resistance of materials correlated with the results of light microscopy and put forward suggestions about the impact of surfacing mode on the properties of the material. The paper found that the use of plasma deposition technology enables the creation of composite materials without internal defects and variation in deposition mode allows you to adjust the structure and chemical composition of the material that is beneficial to the performance properties of the material. (C) 2017 The Authors. Published by Elsevier Ltd.