Scratches on car brake discs occur as the braking force gradually intensifies. When the driver applies the brakes, the tire marks initially transition from rolling marks to compression marks. Subsequently, the tires lock up, and skid marks appear at this point. As the braking force increases, the number of compression marks also gradually rises. Braking and turning at different angles will produce various patterns of side skid marks. 1. The brake disc is a crucial component of the braking system: High-quality brake discs provide stable braking, operate quietly, and are free from vibration. The material used for brake discs adheres to China's gray cast iron 250 standard, abbreviated as HT250, which is equivalent to the American G3000 standard. 2. Factors influencing brake discs: Brake discs are cast products. Due to climatic influences—extreme cold in the north and extreme heat in the south—most brake disc production bases are located in the latitude regions of Shandong, Hebei, and Shanxi in China. Currently, there are two types of brakes: disc brakes and drum brakes. Older vehicles often feature disc brakes at the front and drum brakes at the rear. Many modern vehicles use disc brakes on both front and rear wheels. Because disc brakes dissipate heat more effectively than drum brakes, they are less prone to thermal fade during high-speed braking, resulting in superior high-speed braking performance.
