The Influence of the Cooling Mode during High-Speed Thermal Spraying of Coatings Made of 95Cr18 Steel on Their Structure and Wear Resistance

IF 0.5 4区工程技术 Q4 ENGINEERING, MECHANICAL

Journal of Friction and Wear Pub Date : 2025-02-25 DOI:10.3103/S1068366624700399

V. A. Kukareko, M. A. Belotserkovsky, A. N. Grigorchik, Guo Xiaomei

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Abstract

A study was carried out on the influence of the cooling rate of gas-thermal coatings made of high-chromium 95Cr18 steel on their phase composition and tribotechnical properties. It has been established that preheating the steel substrate to 400°C before spraying the coating leads to a 2.7-fold decrease in its cooling rate in the region of bainite transformation and an increase in the content of retained austenite in the coating to 83.5 vol %. It is shown that the stabilization of austenite is due to the redistribution of carbon between the α- and γ-phases and the enrichment of austenite with carbon. It has been established that a coating made of 95Cr18 steel, sprayed onto a substrate heated to 400°C, is characterized by higher wear resistance under various friction conditions (by 12–24%) compared to a coating formed on a cold substrate. High wear resistance of coatings with a high content of the γ-phase is achieved due to the deformation-activated γ → α transformation, leading to a significant increase in microhardness and wear resistance of the surface layers of coatings.

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来源期刊

Journal of Friction and Wear ENGINEERING, MECHANICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

1.50

自引率

28.60%

发文量

审稿时长

6-12 weeks

期刊介绍： Journal of Friction and Wear is intended to bring together researchers and practitioners working in tribology. It provides novel information on science, practice, and technology of lubrication, wear prevention, and friction control. Papers cover tribological problems of physics, chemistry, materials science, and mechanical engineering, discussing issues from a fundamental or technological point of view.