How to make the brake drum avoid defects

Release time:

2023-10-27

The air hole is the main defect in the casting production of bimetal automobile brake drum, which is mainly distributed in the inner wall and outer wall of the brake drum. In order to get a complete brake drum casting, how to prevent it?

1., when casting brake drum castings, it is necessary to reduce the overheating temperature when the alloy melts, and minimize the contact time between the alloy liquid and the gas during melting.

2. should pay attention to the treatment of steel surface oxides and stains, so the steel plate should be sandblasted; remember to dry the steel parts.

3. in the combination of cast iron and steel parts, we should pay attention to the application of gas cleaning paint.

4. in the process of opening the exhaust (overflow) riser, so that the cavity gas can be discharged in time.

5. shorten the time interval between the molding and pouring, and avoid the absorption of water from the casting.

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