Performance indicators and requirements of friction materials
low brake noise
Braking noise is related to the driving comfort of the vehicle, and it also causes noise pollution to the surrounding environment, especially to the urban environment. Brake noise is an important performance requirement for cars and city buses. As far as car disc pads are concerned, noiseless or low noise brake pads with good friction performance become the first product. With the development of the automobile industry, people are paying more and more attention to brake noise, and relevant departments have proposed standards. Generally, the noise produced by automobile braking should not exceed 85 decibels.
Less wear on the dual surface
The transmission or braking function of friction material products must be realized through friction with the counterpart, that is, the friction disc (drum). During this friction process, the pair of friction couples will wear each other, which is a normal phenomenon. However, friction material products as consumable materials should not only wear as little as possible, but also wear less on the counterpart, that is, the service life of the counterpart should be relatively long. This fully demonstrates the characteristics of good friction performance. At the same time, during the friction process, the surface of the counterpart, that is, the friction disc or the brake drum, should not be ground into heavy scratches, scratches, grooves and other transitional wear conditions.
