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Mild Wear Transition by Supply of Powder on Sliding Surface

通过在滑动表面上提供粉末实现轻度磨损转变

基本信息

批准号：
13650159
负责人：
KATO Hirotaka
金额：
$ 2.24万
依托单位：
Fukui National Collelge 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 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650159/
关键词：
severe wear mild wear transition tribo film Fe_2O_3 particles tribo film area ratio nano-particles sliding surface supply of particles 酸化膜 Fe粉粒子サイズマイルド摩擦摩耗遷移鉄粉酸化摩耗粉酸化鉄粉ナノ超微粒子粉末

项目摘要

When metals slide against each other, a transition from severe running-in wear to mild steady wear is observed. In mild wear, a metal surface is covered with a protective oxide layer that prevents intermetallic contact, resulting in a low wear rate.In this research, the effects of supplying iron-oxide or iron particles on rubbing steel surfaces were investigated by a pin-on-disc wear test method. Particularly, the influence of the size of supplied Fe_2O_3 oxide particles on the transition from severe running-in to mild steady wear with sliding distance was studied.It was found that the supply of fine oxide particles with diameters of 0.5 μm and less accelerated the severe-mild wear transition. In these wear tests, the worn surfaces of the disc were discolored to red, suggesting that compact oxide layers were formed on the rubbing surfaces. The sliding distance of the severe-mild wear transition was reduced when finer particles were supplied, suggesting that fine particles easily form compacted layers on the wear surface. On the other hand, employing oxide particles of 1 μm, no severe-mild wear transition was observed, producing a wear curve similar to that observed in the test where no particles were supplied. The present work is the first to show the critical size of oxide particles, which are considered to be responsible for the formation of protective compact oxide layers on the surface for mild wear; between 0.5 and 1.0 μm in diameter.

当金属相互滑动时，观察到从严重磨合磨损到轻度稳定磨损的过渡。在轻度磨损中，金属表面覆盖有防止金属间接触的保护性氧化物层，导致低磨损率。在本研究中，通过销-盘磨损试验方法研究了氧化铁或铁颗粒对摩擦钢表面的影响。研究了Fe_2O_3氧化物颗粒尺寸对磨损从严重磨合向轻度稳定磨损转变的影响，发现直径小于0.5 μm的氧化物颗粒的加入加速了磨损从严重磨合向轻度稳定磨损的转变。在这些磨损试验中，盘的磨损表面变色为红色，这表明在摩擦表面上形成了致密的氧化物层。当添加较细的颗粒时，磨损从严重磨损转变为轻微磨损的滑动距离减小，表明细颗粒易于在磨损表面形成致密层。另一方面，使用1 μm的氧化物颗粒，没有观察到严重-轻度磨损转变，产生与不提供颗粒的试验中观察到的磨损曲线相似的磨损曲线。目前的工作是第一个显示的氧化物颗粒的临界尺寸，这被认为是负责在表面上形成的保护性致密的氧化物层的轻度磨损，直径在0.5和1.0 μm之间。