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Production and structure of flameSprayed coatings based on Ni-Cr-B-Si alloys

Journal Article · · Sov. Powder Metall. Met. Ceram. (Engl. Transl.); (United States)
OSTI ID:5701969
Hydroabrasive wear tests on coatings were conducted in a 333-US apparatus at the Mekhanobr Institute. The test specimens were 35-mm-diameter cylindrical bshings of 20Kh13 (0.2% C13% Cr) steel, to the side surfaces of which coatings were applied. The abrasive was En-1.25 electrocorundum. The test results obtained showed that the wear resistance of heattreated coatings of a self-fluxing alloy with a binary titaniumchromium boride addition and of untreated coatings from the VSNGN-35+ SNGN-55 + Ni-Al mechanical mixture was 1.5-2 times higher than that of 20Kh13 steel and 3-4 times higher than that of a spray-deposited coating of PG-SR4 self-fluxing alloy. The application of protective A1Y alloy layers has enabled the heat treatment of coatings of self-fluxing alloys to be performed in ordinary furnaces in air, without any detectable oxidation of the main layers.
OSTI ID:
5701969
Journal Information:
Sov. Powder Metall. Met. Ceram. (Engl. Transl.); (United States), Journal Name: Sov. Powder Metall. Met. Ceram. (Engl. Transl.); (United States) Vol. 24:9; ISSN SPMCA
Country of Publication:
United States
Language:
English