Auto parts
In the power transmission, braking safety, and auxiliary system operation of automobiles, core components such as brake discs, gearbox pressure plates, and pulleys play an indispensable role. They respectively undertake key functions such as braking deceleration, power coupling, and power splitting, and their performance directly affects the safety, power efficiency, and reliability of the vehicle. From traditional fuel vehicles to new energy vehicles, these accessories have become an important support for the driving system of automobiles through continuous technological upgrades and adaptation to the performance requirements of different vehicle models.
Performance requirements and technical characteristics
High temperature resistance: During the braking process, the surface temperature of the brake disc can instantly rise to 300-800 ℃. Grey cast iron (HT250, HT300) or ceramic composite materials should be used to ensure strength and wear resistance at high temperatures through a reasonable metallographic structure (pearlite matrix+graphite distribution), avoiding hot cracking or deformation.
Heat dissipation efficiency: The ventilation plate of passenger cars is designed with a radial ventilation groove in the middle, which increases the air circulation area and quickly dissipates heat in conjunction with the airflow generated by the rotation of the wheels; High performance models also use carbon ceramic brake discs, which utilize the material's low thermal expansion coefficient and high thermal conductivity to enhance heat dissipation capabilities.
Braking smoothness: The end face runout of the brake disc should be controlled within 0.05mm, with a surface roughness Ra ≤ 1.6 μ m, to avoid vibration or abnormal noise during braking and improve driving comfort and braking confidence.
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