Introduction to Brake Pad Materials
1. Carbon material;
Carbon material is a new type of material developed in recent years and is a very new technology for clutch bushings. Carbon sleeves are light in weight, high in strength and good in heat resistance, and can withstand high temperatures of 800-1000 °C. Adding friction modifiers can improve the friction properties of carbon materials and has good application prospects.
2. Non-metallic materials;
Non-metallic material is a kind of composite material. Due to the limitation of friction coefficient, it is not widely used in the field of brake pads. It is more used in clutches and equipment with low friction requirements. Although non-metallic materials will not cause scratches on the rotor, they often generate a lot of dust, and the service life and strength need to be improved.
3. Semi-metallic materials;
It is composed of a variety of sintered metals and synthetic materials, has a long service life, high temperature resistance (>200 ° C), and the braking ability of semi-metallic materials is poor.
4. All metal;
It usually contains ferrous and non-ferrous metals, inorganic fibers and organic fibers, a large amount of lubricants containing carbon and sulfide, etc. The materials used for the bushing are mainly steel with high friction coefficient (0.38-0.50) and excellent braking performance. All-metal bushings have a longer life, but the rotor wears more and generates a lot of noise.
5. Organic materials;
At present, organic liners are mostly composed of materials such as fibers or cellulose, and various lubricants and modifiers are added to improve the performance of composite organic materials for automobile brake pads. The friction coefficient of organic material automobile brake pads is high (0.33～0.40), and the low temperature (<200) has good wear resistance.
6. Sintered iron;
The powder metal material is poured into the abrasive and melted at high temperature and high pressure. With anti-skid performance and excellent friction coefficient, it is a very ideal brake pad material. But the iron is heavy and the wear resistance is not good.
