Technical Requirements for Friction Materials (1)
1. Appropriate and stable friction coefficient. The coefficient of friction is one of the most important performance indicators for evaluating any kind of friction material, and it is related to the performance of the transmission and braking functions of the friction plate. It is not a constant, but a number that changes due to the influence of temperature, pressure, friction speed or surface state and surrounding medium factors. The ideal coefficient of friction should have an ideal cold coefficient of friction and a temperature decay that can be controlled. Due to the heat generated by friction, the working temperature is increased, resulting in a change in the friction coefficient of the friction material.
Good abrasion resistance. The wear resistance of friction materials is a reflection of its service life, and it is also an important technical and economic index to measure the durability of friction materials. The better the wear resistance, the longer its service life. However, the wear of the friction material during the working process is mainly caused by the shear force generated by the friction contact surface. Operating temperature is an important factor affecting the amount of wear. When the surface temperature of the material reaches the thermal decomposition temperature range of the organic binder, organic binders such as rubber and resin will decompose, carbonize and lose weight. As the temperature increases, this phenomenon intensifies, the bonding effect decreases, and the amount of wear increases sharply, which is called "thermal wear".
