繁體版     English

E-mail:susan@brakepad.cn     +86-532-66736778

Welcome

News

What are the types of brake pads

[Catalog:News] [Date:2023/3/29] [Hits:] [Return]

The brake pad is the most important component in the automotive braking system, which plays a frictional role in converting the kinetic energy generated when the vehicle is traveling into pressure on the friction surface, thereby achieving vehicle deceleration and parking. The brake system is a complex electromechanical hydraulic control system composed of brake master cylinder, brake wheel cylinder, brake caliper, brake disc, brake pad, and other components. The brake pad is composed of friction materials, mounting accessories, and a braking force adjustment mechanism. The friction material is the main part of the brake pad, and the main component is metal or plastic; Installation accessories are components that play a connecting role between friction materials and brake pads; The braking force adjusting mechanism is a device installed in the brake to adjust the pressure of the braking device and the distance between the discs. During use, due to wear and other reasons, the brake pads will gradually wear out, become thinner, or even break, affecting the braking effect. Therefore, regular inspection and replacement are required.


1. Metal based brake pads
Metal based brake pads are composed of metal materials, mainly iron based, steel based, and intermetallic compounds. Currently, commonly used materials include graphite, carbon fiber, ceramics, and other materials. Generally, carbon fiber is taken as an example, and the carbon content in carbon fiber is about 0.05% - 0.10%. In addition, there are some metal based materials, such as iron based carbon based composites. The main characteristics of metal based brake pads are: good friction performance and low wear rate, but they generate a large amount of heat at high temperatures; Excellent wear resistance, corrosion resistance, and thermal conductivity; Simple manufacturing and low price; Low manufacturing cost; Easy to form, process, form, and weld; Sensitive to temperature changes. In addition, due to the poor high-temperature oxidation resistance of metal based brake pads, it is necessary to add antioxidant additives to enhance their oxidation resistance.
2. Ceramic brake pads
Ceramic brake pads, also known as ceramic brake pads, are composed of friction materials and ceramic pads. They do not produce impurities such as metal debris and dust during use, and have extremely strong wear resistance, heat resistance, and corrosion resistance. Under normal usage conditions, ceramic brake pads have a service life of over 50000 kilometers and can be used in various road conditions, but they are expensive, with a price of around 100 yuan per piece. Because the friction coefficient of ceramic brake pads is very stable, there is no metal debris or dust generation. Therefore, there will be no metal debris, dust, etc. generated on high-speed vehicles, reducing the safety hazards of driving.
3. Composite brake pads
Composite brake pads are composed of materials such as resin and asbestos, and the main components of friction materials are metals or non-metals such as metals and ceramics. Compared with ordinary brake pads, it has the following advantages: (1) The friction material has good heat aging resistance and can be used for a long time. The thermal degradation of ordinary brake pads is severe, and the braking performance will also decrease. The metal and ceramic friction materials in composite brake pads have high thermal aging resistance. (2) Long service life, even under high frequency continuous braking, its braking performance will not significantly decline. Ordinary brake pads are prone to wear and tear, reducing their service life. (3) Low manufacturing costs, available at low prices in the automotive market. However, it also has some defects: rapid wear of ceramic materials, easy to generate dust during use, easy to pollute the environment, and so on.
4. Resin based brake pads
Resin based brake pads refer to brake pads based on resin and composed of friction materials, adhesives, fillers, and additives. Its characteristics are: (1) High friction coefficient, good thermal stability, high temperature resistance, wear resistance, and long service life; (2) High abrasion resistance and good impact resistance; (3) Simple manufacturing process and low cost; (4) Due to the high operating temperature, the sealing requirements for the braking system are high. Resin based brake pads have better braking performance than metal based brake pads. Adding resin to the friction material can improve the thermal conductivity, oil resistance, and wear resistance of the friction material. Due to the fact that resin based brake pads do not generate dust and carbon deposits during use, they do not pollute the environment, but they also have certain disadvantages: due to the complex production process of resin based brake pads, the cost is high.