Measures to prevent and reduce the generation of brake drum crack:
Is there any effective measures to prevent and reduce the generation of brake drum crack? Longyao county to yuan auto parts co., LTD.
1. Prevent the generation of inclusions. Reduce impurities as far as possible during melting; Adopt low S and P burden; The once inclusions should be removed as far as possible before pouring. The reasonable pouring system is adopted to avoid contaminating the alloy by oxide film rupture on the surface of liquid alloy.
2. Adopt the method of low-temperature rapid casting to reduce the casting temperature.
3. Set reasonable casting risers to reduce the cooling rate of some metals in contact with the steel parts.
4. Control the opening time of casting after cooling, and the tendency of premature cracking is large.
The above methods can effectively alleviate this situation, and you can try this method next time you use it.