A production method of aluminum alloy wide and thin rolls with large roll diameter and high flatness

Abstract

The invention discloses a production method of a wide and thin aluminum alloy roll with a large rolling diameter and high planeness and belongs to the technical field of metal processing. The production method concretely comprises the following steps of (1) ingot heating; (2) hot rough rolling; (3) hot finish rolling; and (4) curling. The ingot width is extended in the hot rough rolling process by using an oblique rolling technology, so that the ingot feeding weight is increased, and a roll with a high rolling diameter and large width is rolled. The common problem of super-wide quarter buckle plate shape is solved in the hot finish rolling process by using a designed quintic CVC curve and CVC value. By using the production method, the rolling method for a thin aluminum alloy strip with a large rolling diameter and super-large width is optimized, large-width hot rolling for a super-large width roll material with the weight of 30 tons is realized, and a quarter buckle defect caused in a finish rolling process can be eliminated; and the production method is suitable for popularization in the rolling field of thin aluminum alloy strips with super-large widths.

Description

technical field [0001] The invention belongs to the technical field of metal processing, and in particular relates to a method for producing wide and thin aluminum alloy rolls with large roll diameter and high flatness. Background technique [0002] In China, the widest thin coil in the steel industry is 2270mm, and the widest thin coil in the aluminum industry is 2800mm. Aerospace, automobile, sea and land transportation and other industries have new requirements for the overall forming of aluminum alloy sheets. For example, the maximum width of the 3003 sheet for freight car trailers is 2750mm, and the maximum width of the tank car industry has reached 2800mm. In the next few years, with the development of overall forming technology, the width of aluminum alloy sheet and strip will also increase. It is expected that the widest aluminum alloy coil at home and abroad will reach 3000mm in the next few years. For plate manufacturers, it is the current development trend to use...

AI Technical Summary

Problems solved by technology

For aluminum alloy strips with a width greater than 2650mm, most of them use horizontal rolling + longitudinal rolling or full horizontal rolling to achieve the product width, but the feeding ingots are small, and the feeding ingots are all less than 15 tons, resulting in small subsequent coil diameters, which cannot be realized. Large-diameter rolling with an ingot feeding capacity of more than 15 tons, the yield rate is low

In addition, in the process of wide-width strip rolling, two-ribbed corrugated plates (namely, M-head plate shapes) often appear in the finish rolling, and the existing roll bending and spraying technologies cannot effectively solve this plate shape defect.

The shape defects of finish rolling are difficult to eliminate in the cold rolling process, and have a great impact on the subsequent shape control, and in severe cases, the entire coil will be scrapped directly

Similarly, in the cold rolling process, there are few introductions on the shape control methods for the rolling of ultra-wide strips, and the resulting waves are difficult to eliminate.

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