A kind of aluminum-manganese alloy strip material and preparation method thereof

Abstract

The invention discloses an aluminum-manganese alloy strip and a preparation method thereof. The composition and mass percentage of the aluminum-manganese alloy strip are Al 98.00-98.30%, Si≤0.60%, Fe≤0.70%, Cu≤0.05%, Mg≤0.02%, Mn 1.0~1.5%, Zn≤0.10%, Ti 0.01~0.03%, and the rest are unavoidable impurities. The ratio of the mass of Fe to the mass of Si is between 3.1 and 3.2; The continuous casting method produces ingots. Compared with related technologies, the aluminum-manganese alloy strip produced by this method has excellent comprehensive mechanical properties, good stamping performance, and a tensile strength of up to 170-180MPa, and the aluminum-manganese alloy strip can be applied to capacitor shells body, which solves the problems of serious internal structure segregation, local uneven and coarse grains, and high ear-making rate in the prior art.

Description

【Technical field】 [0001] The invention relates to the field of preparation of aluminum and aluminum alloy strips, in particular to a preparation method of aluminum-manganese alloy strips. 【Background technique】 [0002] With the rapid development of electronic information technology, the replacement technology of digital products is getting faster and faster, and one of the inseparable components of digital products is capacitors. Due to the outstanding advantages of aluminum-manganese alloys such as light weight, high strength, and corrosion resistance, Therefore, the application of aluminum-manganese alloy materials in the capacitor industry is gradually increasing. [0003] In the preparation method of aluminum-manganese alloy strips in the related art, the steps of smelting, casting, homogenization, rolling and annealing are usually included. Mechanical performance problems such as local uneven and coarse grains, high ear-making rate, and surface defects such as orange ...

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Problems solved by technology

[0003] In the preparation method of aluminum-manganese alloy strips in the related art, the steps of smelting, casting, homogenization, rolling and annealing are usually included. Mechanical performance problems such as local uneven and coarse grains, high ear-making rate, and surface defects such as orange peel, roughness, pine branch pattern, and black surface; when the pure aluminum strip is produced by hot rolling, its tensile strength There are only defects such as 100-110MPa, low strength and unstable explosion-proof pressure. The above problems will not only cause capacitor leakage accidents, but may also cause capacitor explosion, endangering safety.

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