What factors affect the coefficient of friction of friction discs?
Factors affecting the coefficient of friction of friction disc:
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 begins to decrease. When the temperature reaches the decomposition temperature range of the resin rubber, the coefficient of friction suddenly decreases, known as "thermal recession".
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 disc 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 level than the original normal coefficient of friction and excessive recovery, which is known as "excessive recovery".
4,When the surface of the friction disc 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 surface of the friction disc is oiled, the coefficient of friction will be significantly reduced, but a certain amount of friction should be maintained so that it still has a certain braking efficiency.
