Improvement of Friction and Wear Characteristics for Advanced Al-Si Alloy Matrix Composites

先进铝硅合金基复合材料摩擦磨损特性的改善

• 批准号: 13650158
• 负责人: GOTO Hozumi
• 金额: $ 2.18万
• 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: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650158/
• 关键词: Al alloy-graphite composite; Friction and wear; Adhered film; Material combination; Drop feed lubrication; Al-Si alloy; Graphite; アルミ炭素複合材; アルミニウム合金基複合材料; 摩擦・摩耗; 材料の組み合せ; 潤滑油

Unlubricated pin-on-disk type wear tests of an Al-Si alloy impregnated graphite composite in contact with a bearing steel were conducted in dry and wet gas environments of argon, nitrogen, air and oxygen. The properties of an adhered film generated on the sliding surface of the bearing steel were investigated and then friction and wear characteristics of the composite were elucidated. The composite, having a humidity dependency, exhibits wear resistance and friction performance better than the matrices (Al-Si alloy and graphite) in wet gases, indicating that the improvement of tribological characteristics has been made by composing the matrices. The adhered film is generated on the sliding surface of the bearing steel just after the start of the tests and serves as an effective solid lubricating film, especially in wet gases. The mixture of Al-Si alloy wear particles in graphite powder promotes the formation of the films under press-slide fattening action. More compared films are gener … More ated with decreasing oxygen in the wet gas environment and contribute to the improvement of wear resistance of the composite. Pin lifting i.e. negative wear takes place in wet gases during the initial stage and subsequently lower wear occurs with increasing pin lifting height.In order to investigate the good mating materials in sliding contact with the Al-Si alloy impregnated graphite, pin-and-disk type wear tests were conducted and the material combination showing minimum friction and wear was obtained. The composite in contact with itself yields low friction and wear, indicating the best material combination. Ferrous metals such as mild steel, cast iron, bearing steel and commercial thrust bearing in contact with the composite exhibit low friction and middle levels of wear rate, showing better material combinations. The composite in contact with its matrices gives the middle levels of friction and wear, showing bad combinations. Titanium in contact with the composite brings about high friction and wear, resulting in an inadequate combination. Graphite, copper, brass and titanium in contact with the composite causes wear damage to themselves, leading to the most inadequate combinations for sliding surfaces.Unidirectional sliding wear tests of the Al-Si alloy impregnated graphite composite and it matrices (pin) in contact with the bearing steel (disk) were conducted using engine base oil to investigate the tribological characteristics under the lubrication methods of immersion feed or oil-drop feed only before the tests. In the case of the composite pin, as the amount of oil drop is increased, the friction coefficient and wear rate reach the values for the immersion test. The breakdown of oil film does not occur even with very small amount of oil-drop. For the Al-Si alloy pin, the sliding distance to the breakdown of an oil film tends to increase with the amount of oil drop. The wear scarcely occurs but the friction coefficient fluctuates greatly before the oil film breakdown and afterwards the friction and wear rapidity increase. In the case of the graphite pin, the friction coefficient and wear rate under oil-drop feed are lower than those under the immersion feed but the wear rate does not change irrespective of the amount of oil drop. These results suggest that the composite is one of the good sliding materials even under severe lubricating conditions compared with the matrices. Less

在氩气、氮气、空气和氧气的干、湿气体环境中，进行了铝硅合金浸渍石墨复合材料与轴承钢接触的无润滑销-盘型磨损试验。研究了在轴承钢滑动表面形成的粘附膜的性质，阐明了该复合材料的摩擦磨损特性。复合材料具有一定的湿度依赖性，在湿气体中的耐磨性和摩擦性能优于基体（铝硅合金和石墨），表明复合基体改善了摩擦学性能。刚开始试验后，在轴承钢的滑动表面上产生粘附膜，并用作有效的固体润滑膜，特别是在潮湿气体中。铝硅合金磨粒在石墨粉中的混合，促进了压滑增脂作用下薄膜的形成。比较多的电影是gener ...更多信息 随着湿气环境中氧气含量的降低，有助于提高复合材料的耐磨性。为了研究与浸渍石墨铝硅合金滑动接触的良好配合材料，进行了销盘式摩擦磨损试验，获得了摩擦磨损最小的材料组合。与自身接触的复合材料产生低摩擦和磨损，表明最佳材料组合。与复合材料接触的黑色金属如低碳钢、铸铁、轴承钢和商用推力轴承表现出低摩擦和中等水平的磨损率，显示出更好的材料组合。与其基体接触的复合材料产生中等水平的摩擦和磨损，显示出不良的组合。钛与复合材料接触会产生高摩擦和磨损，导致结合不充分。与复合材料接触的石墨、铜、黄铜和钛对它们自身造成磨损损伤，在发动机基础油中，对铝硅合金浸渍石墨复合材料及其基体（销）与轴承钢（盘）进行了单向滑动磨损试验，研究了浸油和油润滑条件下的摩擦学特性。只在测试前投喂。在复合销的情况下，随着油滴量的增加，摩擦系数和磨损率达到浸泡试验的值。即使只有很少量的油滴，油膜也不会破裂。对于铝硅合金销，随着油滴量的增加，到油膜破裂的滑动距离趋于增加。在油膜破裂前，摩擦系数波动较大，而油膜破裂后，摩擦磨损速率增大。在石墨销的情况下，油滴进料下的摩擦系数和磨损率低于浸没进料下的摩擦系数和磨损率，但无论油滴的量如何，磨损率都不会改变。这些结果表明，该复合材料是一种良好的滑动材料，即使在苛刻的润滑条件下，与基体相比。少

项目成果

後藤穂積, 内城憲治: "アルミニウム炭素複合材料の摩耗における皮膜成長過程"日本機械学会2001年度年次大会講演論文集. No.01-1(III). 65-66 (2001)

Hozumi Goto、Kenji Uchijo：“铝碳复合材料磨损过程中的薄膜生长过程”日本机械工程师学会 2001 年年会论文集 No.01-1(III) (2001)。

後藤穂積, 高木 聡: "アルミニウム合金-グラファイト複合材料の潤滑油中すべり摩擦・摩耗特性"日本機械学会、九州支部講演論文集. No.038-1. 225-226 (2003)

Hozumi Goto、Satoshi Takagi：“铝合金-石墨复合材料在润滑油中的滑动摩擦和磨损特性”日本机械工程学会九州分会讲座论文集第038-226号（2003年）。

Hozumi Goto: "Relationship between Coefficient of Tangential Force and Relative Displacement during Fretting Wear"Proc.of the International Tribology Conf.Nagasaki 2000, JAST. Part I. 413-418 (2001)

Hozumi Goto：“微动磨损时切向力系数与相对位移之间的关系”Proc.of the International Tribology Conf.Nagasaki 2000，JAST。

Hozumi Goto: "Relationship between Coefficient of Tangential Force and Relative Displacement during Fretting Wear"Proc. of the International Tribology Conference, Nagasaki 2000, JAST, Part I. 413-418 (2001)

Hozumi Goto：“微动磨损时切向力系数与相对位移之间的关系”Proc。

内城憲治, 護道穂積: "Al-Si合金グラファイト複合材料のトライボロジー特性に及ぼす付着被膜の効果"日本トライボロジー学会、トライボロジスト. (掲載決定).

Kenji Uchijo、Hozumi Godo：“粘附膜对 Al-Si 合金石墨复合材料摩擦学性能的影响”，日本摩擦学会，摩擦学家（已出版）。