SiC粒度对铁基粉末冶金摩擦材料性能的影响

The influence of SiC particle size on friction materials performance of iron based powder metallurgy

本文采用冷压、加压烧结的方法制备了含Si C颗粒的铁基粉末冶金摩擦材料。研究了不同粒度规格（485μm~、250~830μm、180~380μm、150~180μm、75~150μm、~120μm）的Si C对某铁基粉末冶金摩擦材料密度、硬度、摩擦磨损性能等的影响。结果表明：Si C粒度的变化对铁基粉末冶金摩擦材料压坯密度、烧结后硬度及结合性影响较小;随着Si C粒径的减小,铁基粉末冶金摩擦材料的硬度、最大摩擦系数、最小摩擦系数和平均摩擦系数均逐渐减小,磨损量逐渐增大,力矩曲线波动逐渐变大;Si C粒度在180~830μm（-20＋80目）时,铁基粉末冶金摩擦材料表现出较优异的摩擦磨损性能。

The Fe-based friction materials with Si C particles were prepared by cold-pressing and pressure sintering method. The effect of Si C particle size（ 485 μm ~ 、250 ~ 830 μm、180 ~ 380 μm、150 ~ 180 μm、75 ~ 150 μm、~120 μm） on the density,hardness,friction and wear properties was studied. The research demonstrates that the Si C particle size has no significant impact on the density,hardness and associativity of materials,with the decrease of Si C particle size,the hardness,Minimum friction coefficient,maximum friction coefficient and the average friction coefficient of Fe-based friction materials decrease,the wear rate and the torque curve fluctuation increase; Fe-based powder metallurgy friction materials exhibit more excellent friction and wear performance with Si C particle size of180 ~ 830 μm.