Deposition of Cermet Coatings on the Basis of Ti, Ni, WC, andB4C by Cold Gas Dynamic Spraying with Subsequent LaserIrradiation
В. М. Фомин, А. А. Голышев, В. Ф. Косарев, А. Г. Маликов, А. М. Оришич, А. А. Филиппов
Abstract
Abstract This paper studies the formation of cermet coatings by a combined additive manufacturing technology on the basis of cold gas dynamic spraying and subsequent laser irradiation. The coatings are made of titanium and nickel metal powders with ceramic particles of tungsten carbide and boron carbide. Optimal energy parameters are determined for coating deposition by cold gas dynamic spraying and subsequent laser irradiation for powder compositions with different ceramic particles. The microstructure of deposited coatings is studied, and their mechanical properties are measured. It is shown that the combined method of cold gas dynamic spraying and laser irradiation can be used to produce a single-layer cermet coating up to 1 mm thick by sequentially depositing a mixture of powders of different composition, such as B4C–Ni, B4C–Ti, WC–Ti. Based on the obtained experimental data, a technique is proposed for a layer-by-layer deposition of thick (≈4 mm) cermet coatings of composition 40% WC + 60% (0.94Ti + 0.06Al) by cold gas dynamic spraying and subsequent laser irradiation.