The aggregate of the brake pad determines the performance of the brake pad
The brake pad is composed of three parts: steel plate, adhesive insulation layer and friction block
The friction block is mainly composed of friction materials. There are several or more than a dozen raw materials in one brake pad. The friction material mentioned today is only the main ingredient, also known as aggregate.
Asbestos brake pads
The main component of early brake pads was asbestos. In 1972, the World Medical Symposium confirmed that asbestos fibers would affect health. In the same year, governments of various countries imposed standard restrictions on asbestos dust.
Advantages: low price;
Disadvantages: harmful to human body, slow heat dissipation;
semi metal brake pads
Rough steel fibers are used as an important mixture, and there is a certain degree of magnetic
Disadvantages: easy to rust, easy to generate noise, low temperature will cause greater wear and tear on the brake disc, and greater braking force requirements;
Advantages: good heat conduction effect, suitable for braking under high temperature;
metal-less brake pads
Metal components are reduced, and copper powder and steel wool are used in part
Disadvantage: slightly wear-resistant
Advantages: good heat conduction and heat dissipation, low noise, good comfort when braking, and stable friction coefficient;
NAO-ceramic brake pads
Asbestos-free organic brake materials mainly use glass fiber, aromatic polyester fiber or other fibers (carbon, ceramics, etc.) as reinforcement materials, which are commonly referred to as ceramic brake pads.
Its performance mainly depends on the type of fiber and other added mixture;
The cost of ceramic brake pads is extremely high. There are basically no pure ceramic brake pads in the Chinese aftermarket. Pure ceramic brake pads are mainly used for racing;
Powder metallurgy brake pads and carbon-carbon brake pads are mainly used on high-speed rail and aircraft;
The advantages and disadvantages of friction materials are mainly reflected in: friction performance, anti-fatigue ability, sensitivity to temperature, pressure and speed, anti-wear ability and noise. The better the friction material, the better its friction properties can be maintained at different temperatures, pressures and speeds. In other words, its properties should not change much at low or high temperatures. The better the friction material, the less likely there will be brake shrinkage after repeated braking, which keeps the "brake pedal feel" good. Better materials also reduce wear and reduce noise.
Choosing a pair of high-performance brake pads can ensure efficient braking effects in different environments and ensure driving safety! ! !
