The brake disc is a casting product, and its surface is required to be free of casting defects such as sand holes and air holes, so as to ensure the strength and stiffness of the brake disc and prevent accidents under the action of external forces; Two brake surfaces are used for disc brake.....
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The hole in the middle of the brake disc is the main datum for assembly. Therefore, the process of machining holes is very important. At present, the commonly used Valin super hard BN-S30 tool is used for machining; High temperature will be generated during braking......
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Shanghai NQA Certification Co., Ltd. (SNQA for short) is a Sino foreign joint venture certification company with independent legal personality, jointly funded by NQA (NQA for short, a third-party certification agency recognized by UKAS) and Beijing Century Tiantai Investment Co., Ltd.......
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The common material of brake disc is gray iron HT250, the main chemical composition is C (3.1-3.4), Si (1.9-2.3), Mn (0.6-0.9), and the hardness is required to be between 187-241. The brake disc blank is precision cast and heat treated to improve the internal stress generated in the casting process......
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