Differential-temperature rolling method for AlZnMgCu-series aluminum alloy thick plates
An aluminum alloy and sheet rolling technology, applied in metal rolling, metal rolling, manufacturing tools and other directions, can solve the problem of high equipment requirements, and achieve the effects of low equipment requirements, easy implementation and cost saving
Active Publication Date: 2018-04-20
CENT SOUTH UNIV
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Problems solved by technology
In order to improve the uniformity of rolling, researchers have proposed the method of increasing the reduction in passes and the method of drag
Method used
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Embodiment 1
[0016] The aluminum alloy thick plate is made of 7050 aluminum alloy with an original thickness of 370mm. The method of differential temperature rolling is adopted. First, the 7050 ingot is hot-rolled to 180mm by ordinary hot rolling method, and then the surface of the thick plate is cooled to 300°C. The thick plate is hot-rolled to 80mm by using a large reduction rolling with a pass deformation of 20mm, and the final size of the thick plate is: 3000×1200×80mm. Solid solution, quenching and three-stage aging T77 treatment were performed on the thick plate. The tensile properties of the surface layer, 1 / 4 layer and core of the thick plate are shown in Table 1.
[0017] surface The tensile properties of comparative example 1 and embodiment 1
[0018]
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Abstract
The invention discloses a differential-temperature rolling method for AlZnMgCu-series aluminum alloy thick plates, and the method is suitable for producing the AlZnMgCu-series aluminum alloy thick plates with thicknesses of 60-120 mm; The differential-temperature rolling method comprises the following steps of: firstly, rolling cast ingots to 180-240 mm by adopting common hot-rolling; cooling surface layers of rolled plates by a spraying mode, and reducing the temperatures of the surface layers of the hot-rolled plates to 300-400 DEG C, wherein the temperatures of the core parts of the hot-rolled plates are higher than those of the surface layers by 50-100 DEG C; and finally, rolling the hot-rolled plates to target thicknesses by adopting large rolling reduction. The method is used for changing deformation resistance of the surface layers and the core parts by utilizing temperature difference between the surface layers of the hot-rolled plates and the core parts of the hot-rolled plates, enables deformation of the surface layers and the core parts of the hot-rolled plates to be uniform, and improves uniformity of the thick plates. The method is simple and convenient to operate, andhas a practical industrial production application value.
Description
technical field [0001] The invention relates to a rolling method of aluminum alloy, which belongs to the field of non-ferrous metal materials and thermal processing thereof. Background technique [0002] Due to its comprehensive advantages in manufacturing cost, structural weight reduction and formability, aluminum alloy structural parts are widely used in important lightweight overall structures such as aviation, aerospace, navigation and transportation, and are trending towards large-scale integration With the development, the thickness requirements for aluminum alloy sheets are getting higher and higher. With the increase of plate thickness requirements, during the hot rolling process, the stress on the core of the thick plate is much smaller than that on the surface, so the thermal deformation of the core of the thick plate is much smaller than that of the surface. After hot rolling, solution quenching, and aging treatment of aluminum alloy ingots, the performance inhom...
Claims
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Patent Timeline
Login to view more IPC IPC(8): B21B45/02
CPCB21B45/0218B21B2261/04B21B2261/20
Inventor 邓运来范世通黄心悦伍鹏飞龙涛张研徐进军
Owner CENT SOUTH UNIV
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