Tribotechnical Characteristics of Coatings Based on Bronze BRA7N6F after Melting by a Fiber Laser

IF 0.5 4区工程技术 Q4 ENGINEERING, MECHANICAL

Journal of Friction and Wear Pub Date : 2023-06-22 DOI:10.3103/S1068366623010038

O. G. Devoino, E. E. Feldshtein, A. Y. Grigoriev, V. L. Basinyuk, M. A. Kardapolava, I. M. Kosiakova

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Abstract—

The tribotechnical characteristics of coatings based on bronze BrA7H6F after melting with a fiber laser have been studied. Changes of instant friction coefficient, temperature in the friction zone, and wear intensity depending on technology and conditions of coating deposition are considered. Research was carried out on an A-135 tribotester under the scheme of a roller–cradle under the conditions of concentrated contact and high loads. Analysis of wear character and friction surface topography was carried out by electronic microstamping methods. Laser melting provided increase in wear resistance of coatings by 1.5–2 times in comparison with plasma spraying; wear of rubbing surface of coatings increases by 1.3–5 times at an increase of force of loading by 2 times. It is shown that in cases of plasma spraying and laser melting with high energy density of the laser beam on the friction surface the sponge-capillary effect occurs. In conditions of low energy density, the mentioned effect disappears, and plastic flow and adhesive bonding of bronze with the counter-body material (hardened steel 45) is observed on the worn surface.

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光纤激光熔覆br7n6f青铜涂层的摩擦学特性

摘要:研究了光纤激光熔化后br7h6f青铜涂层的摩擦学特性。考虑了涂层沉积工艺和条件对瞬时摩擦系数、摩擦区温度和磨损强度的影响。在a -135型摩擦试验机上进行了集中接触和高载荷条件下滚轮架方案的试验研究。采用电子微冲压技术对摩擦表面形貌和磨损特性进行了分析。激光熔化使涂层的耐磨性比等离子喷涂提高1.5-2倍;加载力增加2倍时，涂层摩擦面磨损增加1.3-5倍。结果表明，在等离子体喷射和激光熔化时，在摩擦表面产生高能量密度的激光束，会产生海绵状毛细效应。在低能量密度条件下，上述效应消失，在磨损表面观察到青铜与对体材料(淬硬钢45)的塑性流动和粘接。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.