Fabrication of Copper-based Powder Metallurgy Brake Pad for High-Speed Train and Its Friction and Wear Property

Through the optimization design of material formula, friction blocks of copper-based powder metallurgy brake pad for high-speed train was prepared by the powder metallurgy method, and the physical and mechanical properties were tested. Then a new type of floating brake pad was assembled through the optimization of the pad structure, and the friction and wear properties of the pad were measured. The results show that shear strength of friction blocks for the brake pad was above 7 MPa. The average friction coefficients of the brake pad was 0.37±0.05 and the average wear loss was 0.126×10^-6 cm³ ·J^-1,which met the requirements of the friction and wear properties for brake pad specified by International Railway Union. The braking properties of the tested brake pad also met the requirements of the 350 km ·h^-1 and above high-speed trains.