Ultra-wide aluminum alloy plate and preparation method thereof

A technology for aluminum alloy sheet and aluminum alloy ingot, applied in the field of aluminum alloy, can solve the problems of increased temperature gradient, double rib wave thickness, large quenching stress, etc., and achieves improved strength and elongation performance, low cost, and refined surface. organizational effect

Active Publication Date: 2021-10-29
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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Problems solved by technology

However, due to the sharp cooling, the temperature gradient inside and outside the plate increases, forming an uneven temperature field, resulting in excessive internal stress of the plate, and a large amount of quenching stress remains; in addition, compared with narrow aluminum alloy plates, ultra-wide Due to the differences in internal structure and external cooling conditions along the width direction of large-scale aluminum alloy sheets, the uneven distribution of residual stress inevitably causes sheet deformation, especially when ultra-wide aluminum alloy sheets are rolled. Therefore, it is necessary to improve the flatness and production efficiency of ultra-wide aluminum alloy plates with a width of more than 2000 mm

Method used

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  • Ultra-wide aluminum alloy plate and preparation method thereof

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Embodiment 17050

[0044] Example 1 Preparation of 7050 aluminum alloy ultra-wide plate

[0045] (1) The chemical composition of 7050 alloy is: Zn 6.2 wt%, Mg 2.2 wt%, Cu 2.3 wt%, Zr 0.1 wt%, Mn≤0.1 wt%, Ti≤0.06, Cr≤0.04 wt%, Fe≤0.15 wt% , Si≤0.12 wt%, the balance is Al and other unavoidable impurities.

[0046] (2) After batching, smelting, slag removal, degassing, and filtration according to the alloy composition, the alloy liquid is cast into an aluminum alloy square ingot by a low-speed semi-continuous casting process; the melting temperature is 720°C.

[0047] (3) The aluminum alloy ingot is placed in a heating furnace for homogenization treatment, and then the head and tail are cut off for surface milling. The homogenization treatment temperature is 450°C and the treatment time is 6.5h.

[0048] (4) The homogenized aluminum alloy ingot is subjected to 3 passes of hot rolling, and ultrasonic treatment is carried out at the same time to obtain a slab; the starting rolling temperature is 410...

Embodiment 27475

[0053] Example 2 Preparation of 7475 aluminum alloy ultra-wide plate

[0054] (1) The chemical composition of 7475 alloy is: Zn 5.8 wt%, Mg 2.4 wt%, Cu 1.6 wt%, Cr 0.22 wt%, Mn≤0.06 wt%, Ti≤0.06 wt%, Fe≤0.12 wt%, Si≤0.10 wt%, the balance is Al and other unavoidable impurities.

[0055] (2) After batching, smelting, slag removal, degassing, and filtration according to the alloy composition, the alloy liquid is cast into an aluminum alloy square ingot by a low-speed semi-continuous casting process; the melting temperature is 710°C.

[0056] (3) The aluminum alloy ingot was placed in a heating furnace for homogenization treatment, and then the head and tail were cut off for surface milling. The homogenization treatment temperature was 480° C., and the treatment time was 7 hours.

[0057] (4) The homogenized aluminum alloy ingot is subjected to 3 passes of hot rolling, and ultrasonic treatment is carried out at the same time to obtain a slab; the starting rolling temperature is 4...

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Abstract

The invention belongs to the technical field of aluminum alloys, and particularly relates to an ultra-wide aluminum alloy plate and a preparation method thereof. According to the preparation method, ultrasonic treatment is carried out in the hot rolling process, vacancies are continuously injected into materials through ultrasonic vibration, a large number of fine and dispersed nanometer precipitated phases are dynamically precipitated from the materials, and a pre-stretching procedure is added before solution treatment, so that the residual internal stress of the aluminum alloy plate is reduced, the strength and the extension performance of the aluminum alloy plate are improved, the produced aluminum alloy plate is stable in performance, high in surface flatness, low in residual internal stress and not prone to deformation during machining.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, in particular to an ultra-wide aluminum alloy plate and a preparation method thereof. Background technique [0002] With the rapid development of economy and science and technology, the demand for aluminum materials continues to increase, especially 2A12, 5083, 5A06, 7050, 7075, etc. The demand for standard aluminum alloy plates has soared. This type of aluminum alloy large-size plates is not only used in the aerospace industry, but also widely used in automobiles, high-speed trains, ships and other fields. [0003] In the production process of aluminum alloy plates, it is necessary to rapidly cool the plates below a certain temperature by quenching, so as to keep the supersaturated solid solution formed at high temperature to room temperature, and lay the foundation for the subsequent aging strengthening treatment. However, due to the sharp cooling, the temperature gradient inside and o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04C22F3/00B21C37/02C22F1/053C22C21/10
CPCC22F1/04C22F3/00B21C37/02C22F1/053C22C21/10
Inventor 黄粒邢清源陈军洲臧金鑫何维维戴圣龙
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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