铁谱磨粒分形特性探讨

Investigation into Fractal Characteristics of Ferrographic Wear Particles

基于磨粒大小与频度关系服从Weibull分布这一条件,得出了随意假定磨粒具)v很小时,磨粒才具有分形特征.利用设计的磨粒分形维数计有分形是错误的,只有当(rr0算系统,通过改变放大倍数对400个铁谱片中的切削磨粒分形维数进行了计算,得出了在铁谱显微镜现有的放大倍数范围内,磨粒的无标度性基本不受影响,选择500～800倍的放大倍数对铁谱磨粒进行分形分析最合适.

The newest progresses in the fractal study of the ferrographic wear particles whose fundamental problems were its fractal characteristics were presented. Based upon the relation between the size of the wear particle and the frequency following the Weibull function distribution,it is wrong supposing randomly that the wear particles have the fractal characteristics, and right only when (r/r0)v is much small. Using the fractal dimension calculation system designed, the fractal dimensions of the cutting wear particles from 400 ferrographic samples were calculated through changing the multiplier. The conclusion is drawn that the nonscale characteristics of the wear particles are not affected within the range of multipliers of the ferrographic microscope and the multiplier within the range of 500～800 is the best choice in the fractal analysis of the ferrographic wear particles.