Scorching is the last processing step of brake pad manufacturing. In it, the surface is exposed to high temperatures reaching around 700 degrees Celsius for a short time. In doing so, the effective running-in period is shortened and driving safety with good braking force is ensured, because the scorching brings the surface of the friction material close to the carbonization point to a depth of about one to two millimeters.
Infrared scorching involves exposing the surface of the brake pad material to infrared radiation, which is a form of electromagnetic radiation with longer wavelengths than visible light. This process is designed to pre-burn or scorch the surface of the brake pad material before it is installed in a vehicle.
The primary purpose of infrared scorching is to accelerate the break-in or bedding-in process that occurs during the initial usage of brake pads. Bedding-in is crucial for optimizing the performance of the brake pads by creating a thin, even layer of transfer film on the surface of the brake rotor. This film improves the friction characteristics between the brake pads and the rotor, enhancing overall braking performance and reducing the likelihood of noise and vibration.
Infrared scorching offers several potential benefits:
- Reduced Break-In Time: The scorching process can shorten the time required for the brake pads to reach their optimal performance level during initial use.
- Improved Consistency: By pre-treating the brake pad surface, manufacturers aim to achieve a more consistent and predictable braking performance across different units.
- Enhanced Friction Characteristics: Scorching helps promote the development of an initial transfer film, contributing to improved friction and wear characteristics during the early stages of brake pad use.
- Noise Reduction: Properly bedded-in brake pads are less likely to produce noise during operation. Infrared scorching can contribute to a smoother and quieter braking experience.