An anodizable medium strength 3xxx aluminum sheet and strip and method of making the same
By microalloying and homogenization of Cr, the formation of bulk α phase is promoted and the growth of β phase is inhibited, which solves the problem of surface defects in 3xxx series aluminum alloys during anodizing and improves the mechanical properties and yield of aluminum alloys.
CN122303691APending Publication Date: 2026-06-30CHINALCO HENAN LUOYANG ALUMINUM FABRICATION CO LTD +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINALCO HENAN LUOYANG ALUMINUM FABRICATION CO LTD
- Filing Date
- 2026-05-08
- Publication Date
- 2026-06-30
AI Technical Summary
Technical Problem
Existing 3xxx series aluminum alloys are prone to forming coarse, high-melting-point second phases during the anodizing process, leading to surface defects and affecting the yield.
Method used
Cr microalloying promotes the formation of stable blocky α phase and inhibits the nucleation and growth of acicular β phase. Combined with homogenization treatment, it forms uniformly distributed fine and dense second-phase compounds, thereby improving the mechanical properties of the alloy.
Benefits of technology
It improves the tensile strength, yield strength and elongation of aluminum alloys, avoids surface defects after anodizing, and improves the yield.
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Figure CN122303691A_ABST
Abstract
An anodizable medium-strength 3xxx aluminum sheet / strip and its preparation method are disclosed, relating to the field of aluminum alloy materials technology. The aluminum sheet / strip comprises the following components by mass percentage: Fe 0.3%~0.7%, Mn 0.9%~1.3%, Si 0.08%~0.22%, Ti 0.01%~0.04%, Cr 0.02%~0.1%, Mg and Zn ≤0.02%, with the balance being Al. This invention not only improves the mechanical properties of the aluminum sheet / strip but also avoids surface defects after anodizing, thereby increasing the yield.
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