Reasons and preventive measures for the formation of bubbles on the surface of hot-rolled aluminum p

Bubbles are generated on the surface of aluminum plates because

the aluminum ingot has a high gas content and a loose structure, and the melt purification treatment should be strengthened.

The surface of the ingot is uneven and has dirt. In this case, it was not cleaned before loading.

There are corrosion residues on the ingot and the aluminum plate.

Note that the heating temperature is too high or the time is too long, which causes surface oxidation.

When welding and frying, the emulsion flows under the aluminum plate.

The measure is to pay attention to environmental control and refining and purification.

The aluminum plate produces through pores because

the ingot contains concentrated bubble impurities and remains on the aluminum plate.

The measure is to strengthen the stirring, refining, degassing and purification of the aluminum liquid and improve the casting process.