Surface layering and creasing of aluminum plates

Delamination, at the end or the center of the edge section of the aluminum plate a layer parallel to the rolling is produced, and interlayer cracks will appear in the front and rear ends, which are more common in aluminum-magnesium alloy aluminum plates.

Inclusion delamination, strip cracks parallel to the surface of the aluminum plate are produced on the cross section of the aluminum plate, extending along the rolling direction, and the distribution is irregular.

Pleating refers to the wrinkles produced by the calender pressing on the surface of the aluminum plate, which makes the aluminum plate present a bright pattern. This pattern will destroy the density of the aluminum plate. The pleated part should not be welded, which will affect the material properties.

Non-metallic intrusion refers to non-metallic debris pressed into the surface of the aluminum plate, showing obvious dots or strips of black and yellow. This non-metallic debris will destroy the continuity of the aluminum plate surface and reduce the corrosion resistance of the aluminum plate.