FORMATION METHOD OF HEAT-RESISTANT COATINGS ON BASIS OF NICKEL ALUMINIDE (NiAl)

摘要

FIELD: metallurgy.SUBSTANCE: invention can be used at production of heat-resistant and antifriction coatings on a part from carbon and alloy steels working under conditions of increased temperatures of up to 1600°C and dry friction. The coating is formed on steel parts by application of an aluminium layer by means of a liquid-phase method and performance of a diffusion annealing. Prior to application of the aluminium layer, a steel part is nickel-plated; after that, the aluminium layer of the technically pure aluminium melt is applied at the temperature of 800-850°C during 3-4 seconds, and diffusion annealing is performed at the temperature of 950-1100°C during 6-10 hours.EFFECT: method allows improving productivity and reducing cost of coating application.1 ex