Effect of substrate preheating on the cermet coating structure obtained using additive technologies

This paper is devoted to the influence of substrate preheating on the structure of cermet coatings made of TI–6AL–4V alloy reinforced with B 4 C particles using direct metal deposition. Coatings with a 15% mass fraction of B 4 C were obtained for the first time. It is shown that substrate preheating makes it possible to produce cermet coatings without cracks. In tribological tests, the wear scar volume of the cermet coating decreased by a factor of eight compared to the coating with a 10% mass fraction of B 4 C.