用铜改性的表面层对钢-钢滑动摩擦耦合器性能的影响

IF 0.5 4区 工程技术 Q4 ENGINEERING, MECHANICAL
V. E. Arkhipov, L. I. Kuksenova, M. S. Pugachev, D. A. Kozlov, G. V. Moskvitin
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引用次数: 0

摘要

摘要 分析了铜合金和涂层在钢-钢摩擦过程中的结构和摩擦技术特性。实验研究了通过气体动力喷涂获得的铜基涂层。测定了带有 Cu : Al2O3 = 55 : 45(重量百分比)和 Cu : Zn : Al2O3 = 35 : 35 : 30(重量百分比)涂层的钢表面的耐磨性和微观几何特性。涂层由主要由铜和刚玉组成的粉末混合物形成。刚玉的颗粒大小为 0.05 μm2,含量低于 1%。在摩擦和磨损条件下进行测试时,涂层具有很高的性能:在 I-20A 矿物油中摩擦时,磨损强度 Ih(涂层)≈ (1.1-1.5) × 10-10,Ih(对体)≈ (0.3-0.4) × 10-11;在 Litol-24 润滑脂中摩擦时,Ih(涂层)≈ (2-5) × 10-10,Ih(对体)≈ 0.2 × 10-11。对这种涂层进行热处理会导致锌向铜中扩散,形成锌在铜中的固溶体(α 相),同时还会形成基于铜锌的电子型固溶体。镀有 Cu-Zn-Al2O3 的钢与 ShKh15 钢配对的接触相互作用机理是基于表面塑性变形区的传质过程,这最大限度地降低了配对钢整体的表面破坏程度,使其在高外部压力下达到实际无磨损状态。摩擦过程中接触相互作用区的形变、扩散和传质都指向 "经典无磨损 "效应,其显著特点是形成了夹杂刚玉的铜锌第三体,它具有从试样转移到对体上的能力,反之亦然,可保护表层不被破坏,但不能形成伺服铜膜(具有特殊的结构状态)。摩擦副材料的高耐磨性是通过摩擦传质膜实现的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Influence of Surface Layers Modified with Copper on the Performance of Steel–Steel Sliding Friction Couples

Influence of Surface Layers Modified with Copper on the Performance of Steel–Steel Sliding Friction Couples

Influence of Surface Layers Modified with Copper on the Performance of Steel–Steel Sliding Friction Couples

The features of the structural and tribotechnical characteristics of copper alloys and coatings during friction of a steel–steel pair are analyzed. Copper-based coatings obtained by gas-dynamic spraying have been experimentally studied. The wear resistance and microgeometric characteristics of the surface of steels with coatings of the composition Cu : Al2O3 = 55 : 45 (wt %) and Cu : Zn : Al2O3 = 35 : 35 : 30 (wt %) are determined. A coating is formed from a powder mixture of copper and corundum, mainly consisting of copper. Corundum is present in the form of particles with a size of 0.05 μm2 in an amount of less than 1%. The coating has a high performance when tested under friction and wear conditions: wear intensity Ih (coating) ≈ (1.1–1.5) × 10–10 and Ih (counterbody) ≈ (0.3–0.4) × 10–11 under friction in I-20A mineral oil; Ih (coatings) ≈ (2–5) × 10–10 and Ih (counterbodies) ≈ 0.2 × 10–11 during friction in Litol-24 grease. Heat treatment of such a coating causes diffusion of zinc into copper with the formation of a solid solution of zinc in copper (α-phase) and an electron-type solid solution based on CuZn is also formed. The mechanism of contact interaction of steel coated with Cu–Zn–Al2O3 in a pair with ShKh15 steel is based on the process of mass transfer in the zone of surface plastic deformation, which minimizes the level of surface destruction of the pair as a whole, reducing it to practical wearlessness at high external pressures. Deformation, diffusion, and mass transfer in the zone of contact interaction during friction point to the effect of “classical wearlessness,” a distinctive feature of which is the formation of a copper-zinc third body interspersed with corundum, which has the ability to transfer from the sample on the counterbody and vice versa, providing protection of the surface layers from destruction but not a servovite copper film (with a special structural state). High wear resistance of friction pair materials is achieved due to frictional mass transfer films.

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来源期刊
Journal of Friction and Wear
Journal of Friction and Wear ENGINEERING, MECHANICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
1.50
自引率
28.60%
发文量
21
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.
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