THE PREPARATION OF BRAKE LININGS FOR A HIGH SPEED RAILWAY CAR

A brake pad for the Chinese high speed railway car was prepared using hybrid carbon fiber/metal fiber as a reinforcing material. The uniformity of carbon fiber dispersion in the raw materials of the brake pad was monitored by SEM. The hit and press process parameters were determined using a polymerization velocity armor plate by measuring the resins' polymerization velocities under different temperatures. The tribological properties of the brake pad were tested using the friction and wear tester for railway rolling stock. The results showed that the mechanical and brake properties of the hybrid fiber reinforced phenolic resin based brake pad under various brake conditions, such as emergency brake to stop, ordinary brake to stop, water sprinkling brake to stop, could meet the requirements of the national railway standard for the high speed railway car. The brake pad's friction properties remained very smooth during the braking process.