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1 Scientific Journal of Gdynia Maritime University

1 2020

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Heat treatment of hypersonic metallisation coatings from false alloys on the basis of alloy Ni80Cr20

Astrashab Evgenij, Grigorchik Aleksandr, Belotserkovsky Marat, Kukareko Vladimir

Scientific Journal of Gdynia Maritime University

2020

nr 116

7--14

The structural-phase state and tribomechanical characteristics of hypersonic metallisation (HM) coatings from false alloys ‘Ni80Cr20 + Al99,3’ and ‘Ni80Cr20 + 08Mn2Si’ in the initial state and after annealing at 550° С and 650°С were investigated. It is shown that annealing of the coating from the false alloy ‘Ni80Cr20 + Al99,3’ leads to a significant increase in its microhardness and wear resistance. In particular, the microhardness of the coating increases ≈ 2 times, and the wear resistance ≈ 19 times in comparison with the initial state. Annealing of the coating from ‘Ni80Cr20 + 08Mn2Si’ leads to a decrease in its microhardness by 1.4 times, and wear resistance decreases by 3.0 times compared with the initial state.