1. Temperature is an important factor affecting the coefficient of friction. In the friction process, due to the rapid increase in temperature, when the temperature exceeds 200 ℃, the coefficient of friction began to decrease. When the temperature reaches the decomposition temperature range of resin and rubber, the coefficient of friction suddenly decreases, which is called "thermal degradation".
2. Severe "thermal fade" will lead to a decrease in braking efficiency. In practice, the friction will be reduced, thus reducing the braking effect, which is very dangerous and must be avoided. Adding high temperature friction modifier filler to the friction material is an effective means of reducing and overcoming "thermal fade".
3,When the temperature of the friction plate gradually decreases after the "thermal recession", the coefficient of friction will gradually return to the original normal state, but sometimes the coefficient of friction will be restored to a higher than the original normal coefficient of friction and excessive recovery, which is known as "excessive recovery".
4,When the surface of friction plate is wet with water, the coefficient of friction will also be reduced. When the surface water film is removed, back to the dry state, the coefficient of friction will return to normal, this is the so-called "water recovery".
5, when the friction plate surface is oiled, the coefficient of friction decreases significantly, but to maintain a certain friction, so that it still has a certain braking efficiency.
