1 chemical composition
The chemical composition of cast aluminum sheets meets national standards or relevant technical standards. The composition should be uniform, the chemical composition analysis sample should be representative, and each melting time should be sampled and analyzed from the chute or the finished product.
2 Appearance quality
A The surface of cast aluminum plate should be smooth, clean, and the shape of aluminum plate is good. Cracks, tropics, slag inclusions, air passages, holes and surface segregation and streaks that affect the use are not allowed.
B The end face of the cast aluminum plate shall be flat and clean, and no edge defects affecting the use shall be allowed.
3 low-fold organization
A cast aluminum plate is small, compact and uniform, in line with the technical standards of Guguan, and each sample should be cut into low-test samples.
B Casting and rolling aluminum sheet structure can not have defects such as slag inclusion, void, stratification, and coarse manager.
4 dimensional tolerance
The plate difference of cast aluminum plate, the convexity requirement is controlled within 1% of the thick plate, the plate thickness difference of one week is less than 3%; the width deviation of cast aluminum plate should be -5-+20mm; the plate difference and convexity should be performed for each roll. Detection of the shape and size of the width, etc.; replacement of rolling laps, alloys, specifications, should be tested for one week.