Research on High Performance Surface Modified Layer with Dispersed Fine Particles

高性能细颗粒分散表面改性层的研究

基本信息

批准号：
14550126
负责人：
FUJII Masahiro
金额：
$ 2.24万
依托单位：
Okayama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550126/
关键词：
Surface Modification Tribology Dispersed Particle Wear Friction Dispersed Precipitation Spraying FEM 複合めっき溶射被膜 FEM

项目摘要

In order to improve the tribological performance of surface modified layer, dispersed particles, dispersed precipitations and ceramics particles spraying were investigated.1. Roller and ring/disk tests were carried out under non-lubricating condition in high vacuum to investigate the tribological performance of particle dispersed composite platings. The influence of elastic modulus of dispersed particles on stresses was investigated with FEM analysis. The maximum values of Von Mises stress in the plated layer increased with increasing particle content and with decreasing elastic modulus of particles. The wear behavior obtained in the experiment could be well explained by the calculated stress field.2. The rolling contact fatigue of a sprayed alumina ceramics was studied with a two-roller test apparatus with oil lubricant. The subsurface shear stresses were calculated with two-dimensional FEM analyses. The maximum values of orthogonal shear stress and maximum shear stress occurred withi … More n the sprayed layer. The depths of observed subsurface cracks were generally deeper than those of the maxima of shear stresses.3. The friction and wear characteristics of stainless steel with dispersed precipitations were investigated with ring-on-disk test apparatuses under oil lubricating condition and non-lubricating condition in air and in vacuum. The friction and wear performances of stainless steel were improved by dispersed precipitations.4. A gear test and a two-cylinder test were carried out under non-lubricating condition in high vacuum. In case of the Ni-P plated gear with dispersed PTFE particles, the wear was almost uniform along the tooth profile and the fluctuation of the dynamic load was small. Though the wear in the two-cylinder test was much smaller than that in the gear test, there is a good correlation of the average friction coefficients between the two tests.These results were useful to design the optimum thickness and dispersed particles of surface modified layer. Less

为了提高表面改性层的摩擦学性能，对分散颗粒、分散沉淀和陶瓷颗粒喷涂进行了研究。1．在高真空非润滑条件下进行了滚轮和环/盘试验，研究了颗粒的摩擦学性能。通过有限元分析研究了分散颗粒的弹性模量对应力的影响，镀层中的 Von Mises 应力的最大值随着颗粒含量的增加和弹性模量的减小而增加。实验中得到的磨损行为可以通过计算得到的应力场得到很好的解释。2．采用油润滑双滚轮试验装置研究了喷涂氧化铝陶瓷的滚动接触疲劳，计算了表面下剪切应力。通过二维有限元分析，正交剪切应力和最大剪切应力的最大值出现在喷涂层内。观察到的表面下裂纹的深度通常比最大剪切应力的深度更深。 3.采用环盘试验装置研究了分散析出不锈钢在油润滑和非润滑条件下、空气中和真空中的摩擦磨损特性。 4．在高真空无润滑条件下进行齿轮试验和两缸试验，对于分散PTFE颗粒的镀Ni-P齿轮，沿齿面的磨损几乎是均匀的。虽然双缸试验中的磨损比齿轮试验中的磨损小得多，但两次试验之间的平均摩擦系数具有良好的相关性。这些结果对设计表面改性层的最佳厚度和分散颗粒。