Research progress on the influence of friction components on the properties of copper-based friction materials
The braking system is the key and core component of the safe operation of high-speed train.Copper-based powder metallurgy friction material has become the preferred material for high-speed train brake plate be-cause of its characteristics of uniform structure,high wear resistance,high hardness and stable friction coefficient,and can give full play to the advantages of matrix material,friction component and lubrication component and their synergies.With the continuous increasement of train speed,the temperature of friction braking has become higher and higher,which puts forward higher requirements on the high temperature stability and oxidation resistance of friction materials.This paper primarily discusses the effects of the types of friction components and adding meth-ods on the structure and friction properties of copper-based powder metallurgy friction materials,and the bonding effect between friction components and matrix and the friction and wear mechanism are summarized and reviewed.The future development trend of copper-based powder metallurgy friction materials is prospected.