权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

A Study on the improvement of the tribological properties of aluminum alloy by micro-arc oxide method

微弧氧化法改善铝合金摩擦学性能的研究

基本信息

批准号：
12650090
负责人：
MURAKAMI Ri-ichi
金额：
$ 2.05万
依托单位：
The University of Tokushima
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650090/
关键词：
Tribology Surface modification Aluminum alloy Arc Ion Plating CrN TiN

项目摘要

Aluminum alloys have an inherently poor wear resistance. In order to improve the wear resistance of aluminum alloy, we selected hard thin film (TiN) coating method. As the results, it was clarified that the wear resistance increased due to coating the TiN thin film onto aluminum alloy, but the TiN film fractured in short sliding distance. This is a problem to apply the aluminum alloy. In order to suppress the fracture of film, we selected the CrN film, which is high toughness ceramics, and the tribological properties were examined.A series of surface polished JIS A2024 aluminum alloy were Arc Ion Plating (AIP) coated with TiN and CrN thin films. A ball on disk tests were used CSME tribometer to evaluate tribological properties between coated aluminum disks and bearing steel (JIS SUJ2) balls. The tribological tests showed that the wear volume of CrN coated aluminum disk was smaller than that of TiN coated one. In addition, the wear volume of bearing steel ball against the CrN thin film was also decreased in comparison with TiN thin film. And the TiN coated disks were fractured by IN normal load, but the CrN coated disks were endured until 3N. The results of scratch tests also showed mat the CrN thin film was high delamination resistance. Hence, the endurance of CrN thin film was produced by the high delaminating resistance.Successive observations of wear tracks of disks and balls were carried out. The wear tracks of ball against the TiN thin film coated disk showed the typical feature of abrasive wear, and that against the CrN thin film coated one showed smooth surface caused by adhesion wear. These facts shows that the direct contact occurred between film and ball in the case of TiN thin film, and in the case of CrN thin film, the contact occurred between ball and adhesion layer. This is a cause of difference of wear properties between CrN and TiN thin film.

铝合金的耐磨性天生就很差。为了提高铝合金的耐磨性，我们选择了硬质薄膜(TiN)涂层方法。结果表明，在铝合金表面涂覆TiN薄膜提高了耐磨性，但TiN薄膜在较短的滑动距离内断裂。这是铝合金应用的一个问题。为了抑制涂层的断裂，我们选择了高韧性陶瓷CrN薄膜，并对其摩擦学性能进行了测试。对JIS A2024铝合金进行了表面抛光处理，并在AIP表面涂覆了TiN和CrN薄膜。利用CSME摩擦磨损试验机考察了涂层铝盘与轴承钢(JIS SUJ2)钢球之间的摩擦学性能。摩擦学试验表明，CrN涂层铝盘的磨损量小于TiN涂层铝盘。此外，与TiN薄膜相比，轴承钢球对CrN薄膜的磨损量也有所降低。TiN涂层的椎体在正常载荷作用下断裂，而CrN涂层的椎体可承受3N。划痕测试结果还表明，CrN薄膜具有较高的抗剥离性能。因此，CrN薄膜的耐久性能是由于其具有较高的分层阻力，并成功地观察到了圆盘和球的磨痕。球与TiN薄膜涂层圆盘的磨损轨迹表现为典型的磨粒磨损特征，而与CrN薄膜涂层圆盘的磨粒磨损轨迹则表现为粘着磨损所致的光滑表面。这些事实表明，在TiN薄膜的情况下，薄膜与球之间发生了直接接触，而在CrN薄膜的情况下，球与粘结层之间发生了接触。这是CrN和TiN薄膜磨损性能不同的原因之一。