ISSN (print) 1995-2732
ISSN (online) 2412-9003

 

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DOI: 10.18503/1995-2732-2022-20-2-73-81

Abstract

Relevance. The paper provides the rationale for creating double-layer composite antifriction modified nickel-phosphorus coatings produced by a chemical deposition on the samples from structural, heat-treatable steels. Methods Applied. Molybdenum disulfide was chosen as a modifier, which can be introduced into the coating matrix of both the first and second layers. The paper describes technological features of the deposition of MoS2-modified nickel-phosphorus coatings on products made of P40 and P40Kh powder steels, and proposes schemes for a possible distribution of the modifier in the coating. To test the adhesion of nickel-phosphorus coatings, the authors used the methods applied for anti-friction coatings on products made of steels and alloys with a thickness of 3 mm or less. Originality. The paper shows the kinetic features of shaping the structure of nickel-phosphorus coatings modified with molybdenum disulfide and efficiency of applying a second layer based on aluminum and chromium phosphate onto them by chemical deposition. It has been established that the modifier should be introduced into the solution for chemical deposition 2–3 minutes after the start of nickel plating in order to increase adhesion to the base. Results. The experimental studies are presented to evaluate the adhesion of nickel-phosphorus coatings modified with MoS2. The paper shows efficiency of the proposed method of applying double-layer composite coatings on products made of heat-treatable sintered and hot-stamped powder steels. Practical Relevance. Based on the experimental studies, the authors proposed technological options to produce composite coatings with different positions of the modifier, improving the functional properties of structural powder steels, widely used in mechanical engineering for manufacturing parts of various configurations.

Keywords

composite coating, powder steel, adhesion, modifier, binder, nickel-phosphorus, molybdenum disulfide, corrosion resistance, friction coefficient.

For citation

Shcherbakov I.N., Gasanov B.G. Research on the Adhesion of Antifriction Composite Double-Layer Corrosion-Resistant Nickel-Phosphorous Coatings Modified with MoS2.Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2022, vol. 20, no. 2, pp. 73–81. https://doi.org/10.18503/1995-2732-2022-20-2-73-81

Shcherbakov I.N. Don State Technical University, Rostov-on-Don, Russia

Gasanov B.G. South-Russian State Polytechnic University (NPI), Novocherkassk, Russia

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