Heat Transfer in Surface Layer of a T15k6 Heterogeneous Hard Alloy under Pulsed High-Energy Irradiation

A one-dimensional model of a hard alloy is proposed, which takes into account the heterogeneity of the physical properties of a composite material by representing it as a sequence of 2 μm TiC and WC carbide particles. The influence of the energy density of pulsed high-current electron beams on the melted layer depth and microstructure is investigated. A comparison of the penetration depths of the hard alloy obtained by calculation and experimentally shows their good agreement. It is found out that with an increase in the beam energy density due to melting of the carbides a (Ti, W)C supersaturated tungsten solid solution is formed and a WC→W 2 C transformation occurs during crystallization.