Investigation of the modes of thermal power treatment of sprayed modified layers

Abstract

The paper presents the findings of a study investigating the properties of sprayed coatings with subsequent electrothermally treated within the context of the Ministry of Internal Affairs of the Republic of Kazakhstan grant project AR19680421. This study considers the peculiarities of electric current flow through the sprayed coating or pre-formed powder layer. The properties of 40X13 steel coatings obtained by hypersonic metallization followed by electrothermosilic treatment are investigated. A method for obtaining a wear-resistant coating is proposed, including the formation of a jet of sprayed particles of two metal wires melted in an electric arc, their deposition as a layer on a pre-prepared surface of the part and subsequent electrothermosilic treatment of the layer. It is proposed to choose martensitic steel as the material of one wire, nickel–chromium or iron-chromium alloy with high electrical resistivity as the material of the other, and the diameter of the wire made of this alloy should be determined depending on the diameter of the steel wire.