The paper studies the influence of thermal treatment of the structure and properties of the composite coating consisting of chromium and titanium carbides and obtained by nonvacuum electron beam melting. It is shown that the coating tempering leads to a decrease in the microhardness and wear resistance. This is because the austenitic structure decomposition with the formation of the soft ferrite-carbide structure. The formation of very hard martensite strengthens the tempered coating and improves its microhardness, which is comparable with that of the initial coating after the electron beam melting. The wear resistance of the hardened composite coating is lower than that of the electron beam melted coating because of brittle martensite, which cannot retain hard carbide particles. The composite coating produced under the optimum treatment conditions possesses higher properties and does not require an additional thermal treatment, that can modify the structure and reduce the mechanical properties of the coating.

本文研究了热处理对由非真空电子束熔化得到的由铬和碳化钛组成的复合涂层的结构和性能的影响。结果表明，涂​​层回火导致显微硬度和耐磨性降低。这是因为奥氏体组织随着软质铁素体-碳化物组织的形成而分解。非常坚硬的马氏体的形成增强了回火涂层并改善了其显微硬度，这与电子束熔化后的初始涂层相当。硬化后的复合涂层的耐磨性低于电子束熔化涂层的耐磨性，因为马氏体变脆，不能保留硬质碳化物颗粒。