Quality requirements for brake drum grey cast iron
Dec 05,2024
The brake drum is an important component of the automobile braking system and is crucial to driving safety. The quality of the brake drum has a direct impact on driving safety and braking performance. The following are some requirements for the quality of gray cast iron for brake drums:
1. Strength requirements: The brake drum needs to have sufficient strength to withstand high temperature and high-speed braking force. The strength requirements of gray cast iron generally require tensile strength not less than 200MPa, yield strength not less than 140MPa, and elongation not less than 1%.
2. Acoustic performance: The brake drum will generate friction noise during braking, so gray cast iron is required to have good shock absorption and silencing performance to reduce the interference of noise to vehicles and drivers.
3. Thermal conductivity: The brake drum will be affected by high temperature heat during braking, so gray cast iron is required to have good thermal conductivity and be able to dissipate the heat during braking in time to avoid overheating of the braking system.
4. Wear resistance: The brake drum will be subject to greater wear during the braking process, so the gray cast iron is required to have good wear resistance, and is not prone to cracks, wear and deformation, etc., to ensure a long service life.
5. No defects: The brake drum requires the quality of gray cast iron to be defect-free, and there must be no defects such as pores, inclusions, shrinkage holes, etc., to ensure the overall performance and reliability of the brake drum.
6. Dimensional accuracy: The brake drum has high dimensional accuracy requirements for gray cast iron, which needs to meet the design requirements of the automobile braking system to ensure the coordination and normal operation with other braking components.
In short, the brake drum has high quality requirements for gray cast iron, which needs to have sufficient strength, good acoustic properties, good thermal conductivity, good wear resistance, no defects, etc., to ensure the safety, reliability and long service life of the brake drum.
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West of Dongwang Village, Gucheng Town, Longyao County, Xingtai City, Hebei Province
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