Influence of Modifying Nanoadditives on the Properties of a Multilayer Composite Coating Obtained by Laser Surfacing


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This paper presents the results of an experimental investigation of the influence of modifying nanoadditives on the structure and mechanical properties of multilayer coatings obtained by the laser surfacing of a composite powder with a strengthening phase. The powder of a nickel-based Ni–Cr–B–Si–Fe self-fluxing alloy with a strengthening phase of tungsten carbide was used as the surfacing material; and a mixture of nanosized refractory powders of titanium nitride and yttrium oxide clad with iron and chromium was used as the modifying additive. It has been established that the surfaced coating represents a complex system of phases formed in the process of melting and interaction of chemical elements of the substrate and of the surfaced powder mixture. The main component of the coating is the compound of nickel with iron of an Ni3(Fe, Cr) type. A partial dissolution of the strengthening phase occurs in the melting process depending on the concentration of the nanomodifier. In the case under consideration, the optimal amount of the modifying additive, which provides a maximum increase in the hardness and wear resistance of the composite coatings of the Ni–Cr–B–Si–Fe/WC system, is 0.1 wt % refractory TiN + Y2O3 nanopowders in the composite material.

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A. Cherepanov

Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences

编辑信件的主要联系方式.
Email: ancher@itam.nsc.ru
俄罗斯联邦, Novosibirsk, 630090

A. Orishich

Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences

Email: ancher@itam.nsc.ru
俄罗斯联邦, Novosibirsk, 630090

V. Ovcharenko

Institute of Strength Physics and Materials Sience, Siberian Branch, Russian Academy of Sciences

Email: ancher@itam.nsc.ru
俄罗斯联邦, Tomsk, 634055

A. Malikov

Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences

Email: ancher@itam.nsc.ru
俄罗斯联邦, Novosibirsk, 630090

V. Drozdov

Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences

Email: ancher@itam.nsc.ru
俄罗斯联邦, Novosibirsk, 630090

A. Pshenichnikov

Institute of Strength Physics and Materials Sience, Siberian Branch, Russian Academy of Sciences

Email: ancher@itam.nsc.ru
俄罗斯联邦, Tomsk, 634055

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