Deep-drawing type 6-series mirror anodized aluminum oxide strip and preparation method thereof

Abstract

The invention discloses a deep-drawing type 6-series mirror anodized aluminum oxide strip and a preparation method thereof. The deep-drawing type 6-series mirror anodized aluminum oxide strip comprises the following chemical components in percentage by mass: 0.70%-0.10% of Si, 0.03%-0.15% of Fe, less than or equal to 0.02% of Cu, 0.01%-0.08% of Mn, 0.80%- 0.15% of Mg, 0.01%-0.05% of Ti and the balance aluminum and inevitable impurities. The strip is prepared by smelting, casting, hot rolling, cold rolling, continuous annealing and plate cutting. According to the aluminum alloy strip of the invention, the tensile strength is greater than or equal to 130 MPa, the yield strength is greater than or equal to 65 MPa, the ductility is greater than or equal to 30%, the average surface and longitudinal grain size is less than or equal to 70 [mu]m, the maximum size of intermetallic compounds is less than or equal to 5 [mu]m, the proportion of the intermetallic compounds in unit area is less than or equal to 1 mm<2> / 100 mm<2>, and by downstream deep drawing and thinning, polishing grinding and anodic oxidation, a mirror high-brightness product is manufactured finally.

Description

technical field [0001] The invention belongs to the field of preparation of aluminum alloy strips, in particular to a deep-drawn 6-series mirror-surface anodized aluminum strip and a preparation method thereof. Background technique [0002] Aluminum alloy has the characteristics of light weight, good formability, good anodic oxidation, and good heat dissipation. It is widely used in notebook computer casings, lighting decoration, interior and exterior decoration of automobiles, and electronic cigarette casings. For some parts with complex shapes, not only good deep drawing performance and deformation resistance are required, but also a bright and texture-free surface after polishing and anodizing is required. Therefore, the material is required to have good strong plasticity, and it is also required to have good mirror anodic oxidation requirements. There are many factors that affect the appearance of the mirror anodized aluminum plate. In addition to the quality of grindin...

AI Technical Summary

Problems solved by technology

By adjusting alloy elements, 390-410°C, 8-12 hours and 530-540°C, 30-40 hours long-term double-stage homogenization treatment, combined with 540-570°C, 1-2 hours long-term solution treatment, Finally, a high-strength product with a finished product thickness of 4.0~10.0mm is produced, but the application is limited to the thick plate of the mobile phone frame, and it is difficult to use it on parts that are difficult to stamp.

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