Abstract
Cast Mo2NiB2–Ni metal-matrix composites and protective coatings thereof were fabricated by centrifugal metallothermic SHS process. The quality of SHS surfacing was found to depend on process parameters such as the mass of green mixture per unit surface area of substrate and centrifugal acceleration. The hardness of synthesized coatings was rather high and attained as large values as 800–1200 H V. Optimal conditions for deposition of high-quality protective coatings onto a steel substrate were found experimentally. The process can be recommended for practical implementation in production of cutting tools, tribological materials, molds, and deposition of protective coatings. The present results can be expected to make a theoretical background for industrial-scale manufacturing of new tungsten-free MMCs and protective coatings with valued service parameters.
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