Composite gradient structures in functional tungsten coatings of carbon steels

Abstract

The structural and phase transformations in tungsten-containing functional coatings of carbon steels manufactured during high-energy processes of implanting micro-powders of tungsten carbide through the method of complex pulse electro-machining are investigated. It is shown that in the course of a thermo-force impact in the area of deformation passes an intensive steel austenitizing with tungsten carbide powder dissolution with the further formation of composite gradient structures as a result of the decomposition of super-cooled austenite oversaturated by tungsten both through a diffusion mechanism, and a mechanism of spinodal stratification.