Abstract

The structure and phase composition of sintered Ni–Cr–NiAl alloys and the kinetics of their electrospark deposition onto 45 steel are examined. It is shown that the mass transfer coefficient for the deposition with the sintered alloys is 50 to 71% lower than that when hot-pressed and cast alloys of the same composition are used. The microhardness and structure of the Ni–Cr–NiAl coatings are studied. It is shown that the structure is characterized by fine conglomerates of the phases––nickel and chromium solid solutions and nickel-aluminum intermetallides.

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