Why do brake pads have a short life
Why brake pads have a short life: Like all objects, their material structure and molecular linkage strength decrease at high temperatures. The principle of braking is to convert kinetic energy into heat energy in the way of friction, thus building the brake (energy balance theory). Therefore, a large amount of heat caused by the friction between the brake pad and the disc will accumulate on the surface of the friction material of the brake pad. The brake pad of the original car is built to maintain sufficient strength under this high temperature condition. It is necessary to use high temperature resistant resin, low purity graphite, low purity barium sulfate and other materials, so that these materials as if you only select the size of the coal from a carload of carbon, the cost will be greatly reduced. Thus inferior brake pads, they will never use such high-grade materials, therefore, they can never ensure the stability under high temperature, so with the increase of speed, the heat is more and more, the temperature is lower and lower, the connection strength is higher and higher, and then reduce the braking ability, showing that the braking distance is shortened. Therefore, you can walk in the city under the state of 20~60 kilometers per hour believe that the brake pad, by no means a symbol of your high-speed state under the same smooth braking distance performance. If the molecular chain is in a high temperature state after the connection strength is reduced, the damage is accelerated, which is why the mountain or often sudden braking condition of the brand brake pad service life is very long.
