How to solve the problem of oxidation slag inclusion in low pressure casting
Release time:
2020-11-13
With the continuous progress of society, science and technology are also constantly developing. The products we use in our lives are becoming more and more refined. Mainly depends on the continuous improvement of processing technology.
How to solve the problem of oxidation and slag inclusion in low pressure casting
With the continuous progress of society, science and technology are also constantly developing. The products we use in our lives are becoming more and more refined. Mainly depends on the continuous improvement of processing technology. Now there are casting methods such as aluminum casting, gravity casting, sand casting, low pressure casting, etc., and the benefits of different methods are also different. This time, let's talk about how to solve the problem of oxidation slag inclusion in low pressure casting.
Common problems of low pressure casting
Mainly aimed at the common problems of aluminum alloy wheels in low-pressure casting, the characteristics of oxidation and slag inclusion defects, and the prevention methods of oxidation and slag inclusion. The defect characteristics of pore shrinkage, the reason and prevention method of pore shrinkage. Defect characteristics of shrinkage, causes and prevention methods. Defect characteristics of cracks, causes and prevention methods.
Defect characteristics: oxidized slag is mostly distributed on the upper surface of the casting, at the corners of the mold where no air flow. The fractures are mostly grayish white or yellow, and they can be found by X-ray fluoroscopy or mechanical processing. They can also be found in alkaline washing, acid washing, anodization or using metal flaw detectors.
cause:
1. The charge is not clean, and the amount of back charge is too much
2. Poor gating system design, improper setting during punching
3. The slag in the alloy liquid is not cleaned
4. Improper pouring operation brings in slag
5. Not enough standing time after refining and deterioration treatment
Prevention method:
1. The charge should be sand blown, and the amount of charge used should be appropriately reduced
2. Improve the design of the gating system to increase its slag retaining ability
3. Use proper flux to remove slag
4. The filter screen should be placed steadily when pouring, and attention should be paid to cleaning the slag
5. After refining, the alloy liquid should stand for a certain period of time before pouring
Low pressure casting is a very common and very practical processing method. However, during the operation, the problem of oxidation and slag inclusion in low-pressure casting is often due to some requirements or improper processing techniques. The above has described the causes and solutions of oxidation slag inclusion in a very good quality.
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Copyright: Jinan Laizhi CNC Equipment Co., Ltd.
