Factors Affecting the Friction Coefficient of the Friction Plate
1. Temperature is an important factor affecting the coefficient of friction. During the friction process, the friction coefficient begins to decrease when the temperature exceeds 200 °C due to the rapid increase in temperature. When the temperature reaches the decomposition temperature range of resin rubber, the friction coefficient suddenly decreases, which is called "thermal recession".
2. Severe "thermal recession" will lead to a decrease in braking efficiency. In practical applications, the friction will be reduced, thus reducing the braking effect, which is very dangerous and must be avoided. Adding high temperature friction modifier fillers to friction materials is an effective means to reduce and overcome "thermal recession".
3. When the temperature of the friction plate gradually decreases after the "thermal recession", the friction coefficient will gradually return to the original normal state, but sometimes the friction coefficient will return to a higher than the original normal friction coefficient and excessive recovery, which is the so-called "excessive" recover".
4. When the surface of the friction plate is wetted by water, the friction coefficient will also decrease. When the surface water film is removed and returned to a dry state, the friction coefficient will return to normal, which is called "wading recoverability".
5. When the surface of the friction plate is stained with oil, the friction coefficient is obviously reduced, but a certain friction force must be maintained so that it still has a certain braking efficiency.
