INVESTIGATION ON FRICTION AND WEAR CHARACTERISTICS OF ADVANCED ALUMINUM ALLOY MATRIX COMPOSITE UNDER VARIOUS LUBRICATING CONDITIONS

先进铝合金基复合材料在不同润滑条件下摩擦磨损特性研究

• 批准号: 16560130
• 负责人: GOTO Hozumi
• 金额: $ 2.3万
• 依托单位: FUKUOKA INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16560130/
• 关键词: Aluminum alloy matrix composite; Al-Si alloy; Graphite; Friction and wear; Drop-feed lubrication; Immersion lubrication; Environmental humidity; Al合金含浸グラファイト複合材; 油量; 環境; 相対湿度; Al-Si合金含浸グラファイト複合材料; フレッティング; 接触荷重

Friction and wear characteristics of Al-Si alloy impregnated graphite composite (ALGR-MMC) and its matrices (graphite and Al-Si alloy) in contact with bearing steel were investigated under lubricated sliding conditions. Pin-on-disk type friction and wear tests were conducted under dry sliding, drop-feed lubrication (0.005 to 1.00cm^3) before sliding and immersion lubrication (90cm^3) by using SAE 30 engine oil. Changes in friction and wear were monitored continuously throughout the tests. For the Al-Si alloy, a breakdown of oil film occurs below 0.03cm^3 of oil drop. After the oil film has broken down, the friction coefficient (f) and wear rate (w) rise drastically, causing damage to the counter surface. The f and w for the graphite decrease with increasing amount of oil but the values are higher than those of the Al-Si alloy and ALGR-MMC under immersion lubrication. A gradual decrease in friction and wear for ALGR-MMC with increasing amount of oil is found without the breakdown of oil … More film and the damage to the counter surface. The f and w are much lower than those for the matrices, indicating that ALGR-MMC is an excellent sliding material that can be used even under insufficiently lubricated sliding conditions. The f and w of ALGR-MMC go up with increasing X-ray intensity of Al and C of adhered films on the counter surface.The effects of relative humidity (RH) in air on the wear of ALGR-MMC were investigated under drop-feed lubrication. The wear curves were classified into three types. In Type 1 curves, the pin lifting appears just after the start of tests followed by steady state wear. In Type 2 curves, after the process of Type 1 the pin lifting appears again, followed by the breakdown of oil film. In Type 3 curves, wear dose not occur after the pin lifting in the early stage of the tests. The occurrence frequency of Type 1 is high at RH=50 to 80%. The Type 2 curves appear only at RH【less than or equal】5%, indicating that the oil film breakdown takes place at very low humidity. The Type 3 curves appear at low humidity of RH=10 to 50%. The steady-state wear rate is higher at high humidity and shows a maximum at RH=70% in the Type 1 curves.In order to investigate the effects of contact load on the friction and wear characteristics of an ALGR-MMC under fretting conditions, flat-against-ball type fretting wear tests for the composite (flat) in contact with bearing steel (ball) were conducted in moist air at various loads. From the results two types of fretting process were found to occur. In Type A, the coefficient of kinetic friction (f_k) was high in the initial stage followed by a drastic decrease in f_k to a constant value in the steady-state stage. In Type B, f_k was constant throughout the tests. The amplitude of relative slip could not be kept constant at a desired value of 50μm in the higher load range from 75 to 100N but kept in the lower load range from 5 to 60N. The mean wear rates throughout the tests in Type B were lower those that in Type A. The mean wear rate for both the types was increased with contact load from 5 to 100N. The occurrence of the two types of fretting process is due to a difference in the contact area portion of Al-Si alloy and graphite for each test. Less

研究了润滑滑动条件下铝硅合金浸渍石墨复合材料（ALGR-MMC）及其基体（石墨和铝硅合金）与轴承钢接触的摩擦磨损特性。使用 SAE 30 发动机油，在干滑动、滴油润滑（0.005 至 1.00cm^3）之前进行滑动和浸入润滑（90cm^3）下的销盘式摩擦磨损测试。在整个测试过程中持续监测摩擦和磨损的变化。对于铝硅合金，油膜击穿发生在油滴0.03cm^3以下。油膜破裂后，摩擦系数（f）和磨损率（w）急剧上升，导致配合面损坏。石墨的f和w随着油量的增加而降低，但在浸没润滑下该值高于Al-Si合金和ALGR-MMC。随着油量的增加，ALGR-MMC 的摩擦和磨损逐渐减少，但油膜没有破裂，配合面也没有损坏。 f和w远低于基体，表明ALGR-MMC是一种优异的滑动材料，即使在润滑不足的滑动条件下也可以使用。 ALGR-MMC 的 f 和 w 随着相对表面粘附薄膜 Al 和 C 的 X 射线强度的增加而增加。在滴注润滑条件下，研究了空气中相对湿度 (RH) 对 ALGR-MMC 磨损的影响。磨损曲线分为三种类型。在类型 1 曲线中，销升起出现在测试开始后，随后是稳态磨损。在类型2曲线中，在类型1的过程之后，再次出现销钉抬升，随后油膜破裂。在类型3曲线中，在测试的早期阶段销提升后没有发生磨损。类型1的发生频率在RH=50～80%时较高。 2型曲线仅在RH【小于或等于】5%时出现，表明油膜破裂发生在非常低​​的湿度下。类型 3 曲线出现在 RH=10 至 50% 的低湿度条件下。高湿度下稳态磨损率较高，在类型1曲线中RH=70%时显示最大值。为了研究微动条件下接触载荷对ALGR-MMC摩擦磨损特性的影响，在潮湿空气中对与轴承钢（球）接触的复合材料（平面）进行了平对球型微动磨损试验。从结果中发现发生了两种类型的微动过程。在A型中，动摩擦系数（f_k）在初始阶段较高，随后在稳态阶段f_k急剧下降至恒定值。在 B 型中，f_k 在整个测试过程中保持不变。在75至100N的较高负载范围内，相对滑移的幅度不能保持恒定在50μm的期望值，但在5至60N的较低负载范围内保持恒定。在整个测试过程中，B 型的平均磨损率低于 A 型。两种类型的平均磨损率均随着接触载荷从 5 N 增加到 100 N 而增加。两种类型微动过程的发生是由于每次测试中铝硅合金和石墨的接触面积部分不同所致。较少的

项目成果

Fretting wear of Al–Si alloy matrix composites

• DOI: 10.1016/j.wear.2003.10.026
• 发表时间: 2004-03
• 期刊: Wear
• 影响因子: 5
• 作者: H. Goto;K. Uchijo

Effect of Material Combinations on Friction and Wear of Al-Si Alloy Impregnated Graphite Composite under Dry Sliding

材料组合对铝硅合金浸渍石墨复合材料干滑动摩擦磨损的影响

• 发表时间: 2005
• 期刊: Synopses of the International Tribology Conference Kobe-2005, Kobe, Japan, May 29-June 2
• 作者: Hozumi Goto;Kenji Uchijo;Takahiro Inokuchi
• 通讯作者: Takahiro Inokuchi

Al-Si合金含浸グラファイト複合材料のフレッティング摩擦・摩耗特性

Al-Si合金浸渍石墨复合材料的微动摩擦磨损性能

• 发表时间: 2004
• 期刊: 日本機械学会第12回機械材料・材料加工技術講演会講演論文集 No.04-15
• 作者: 天本祥文;後藤穂積
• 通讯作者: 後藤穂積

Wear Mechanism of Al-Si Alloy Impregnated Graphite Composite under Dry Sliding

铝硅合金浸渍石墨复合材料干滑动磨损机理

• 发表时间: 2005
• 期刊: Wear 259・1-6
• 作者: Hozumi Goto;Kenji Uchijo
• 通讯作者: Kenji Uchijo

Effects of Contact Load on Fretting Wear of Al-Si Alloy Impregnated Graphite Composite

接触载荷对铝硅合金浸渍石墨复合材料微动磨损的影响

• 发表时间: 2005
• 期刊: Proceedings of WTC2005,World Tribology Congress III, WTC2005-63726,Washington D.C.,USA, September 12-16 (CD-ROM)
• 作者: Hozumi Goto;Yoshifumi Amamoto
• 通讯作者: Yoshifumi Amamoto