Application of Big Flake Graphite in Brake Linings Production
Big Flake Graphite has found significant applications in the production of brake linings, playing a crucial role in enhancing the performance of brake linings friction materials.
1. What is Big Flake Graphite?
Big Flake Graphite is a form of graphite characterized by its large and distinct flake – like structure. Its unique physical properties make it an attractive additive in various industrial applications, especially in the production of brake linings.
2. Application in brake linings mixture
In the production of brake linings, Big Flake Graphite is incorporated into the brake linings mixture. When added to the brake linings mixes, it interacts with other components of the friction materials. For example, in a typical brake lining formulation, Big Flake Graphite can be added at a proportion of 5% – 15% by weight. This addition significantly affects the performance of the final brake lining product.
3. Advantages
3.1 Excellent Friction Stability
Big Flake Graphite contributes to excellent friction stability. Tests have shown that brake linings with Big Flake Graphite can maintain a relatively stable coefficient of friction. In a dynamometer test, under a speed range of 50 – 150 km/h and a pressure range of 0.5 – 2 MPa, the coefficient of friction of brake linings with Big Flake Graphite fluctuates within a narrow range of 0.35 – 0.45, which is much more stable compared to brake linings without it. This stability ensures consistent braking performance, reducing the risk of sudden changes in braking force during vehicle operation.
3.2 Good Heat Dissipation
It has remarkable heat dissipation properties. During the braking process, a large amount of heat is generated. Big Flake Graphite in the brake linings can effectively conduct heat away. In a high – speed braking test, the temperature rise of brake linings with Big Flake Graphite was 20 – 30°C lower than that of those without it after 10 consecutive braking cycles from 100 km/h to a complete stop. This helps to prevent the brake linings from overheating, which can lead to fade in braking performance.
3.3 Reduced Wear
The use of Big Flake Graphite also reduces the wear of brake linings. Laboratory wear tests have demonstrated that the wear rate of brake linings with Big Flake Graphite is approximately 30% lower than that of traditional brake linings over a test period of 100,000 braking cycles. This not only extends the service life of the brake linings but also reduces the frequency of brake lining replacements, saving costs for vehicle owners.
4. Disadvantages
4.1 Cost
One of the main drawbacks of using Big Flake Graphite in brake linings production is its cost. Big Flake Graphite is relatively more expensive compared to some other common additives in the brake lining industry. For example, the cost of Big Flake Graphite can be 2 – 3 times higher than that of some traditional friction – modifying agents per unit weight. This increased cost may be a limiting factor for some manufacturers, especially those with cost – sensitive production processes.
4.2 Processing Difficulties
There are also processing difficulties associated with Big Flake Graphite. Due to its large flake structure, it can be challenging to disperse evenly in the brake linings mixture. Uneven dispersion may lead to inconsistent performance of the brake linings. Special processing techniques and equipment are often required to ensure proper dispersion, which adds to the production complexity and cost.
In conclusion, while Big Flake Graphite offers significant advantages in terms of friction stability, heat dissipation, and wear reduction in brake linings production, its higher cost and processing difficulties need to be carefully considered by manufacturers when making decisions on its use in brake linings friction materials.