A rolling preparation method of aluminum alloy strip with poor performance in width direction

Abstract

The invention discloses a rolling preparation method of an aluminum alloy strip with differential performance in width direction. The method comprises the steps that a hot-rolled aluminum alloy coiledmaterial subjected to annealing treatment is placed on a left side coiling machine, and the coiled material penetrates through a left side local cryogenic device, a reversible rolling machine, a right side local cryogenic device and a right side coiling machine, wherein the local cryogenic devices are arranged in the width direction of the coiled material to realize local cryogenic; the local cryogenic devices are started, a local area of the surface of a roller is subjected to cryogenic treatment by adopting cooling nitrogen, and a roller cooling area corresponds to a coiled material cryogenic area in the width direction; the coiling machines at the two sides are started, so that a rolled piece is provided with front and back tension, and the whole roll of aluminum alloy coiled materialis rolled; the same cryogenic treatment position is repeated and maintained in each pass until the total rolling reduction rate of the rolled piece reaches 50%-95%, and the aluminum alloy coiled material with the differential performance in the width direction is prepared; and furthermore, low-temperature heat treatment can be carried out on the rolled aluminum alloy coiled material. The rolling preparation method can prepare a plurality of strips with performance differences according to product requirements.

Description

technical field [0001] The invention belongs to the technical field of metal material rolling, and in particular relates to a rolling preparation method of an aluminum alloy strip with poor performance in the width direction. Background technique [0002] Poor performance plates are widely used in the manufacture of industrial parts such as automobiles and aerospace. Traditional poor performance plates are prepared by welding a variety of strips with different properties. However, due to the combination of two different materials in the welding process, it is difficult to achieve a perfect combination, especially when the weld effect exists in some cases, the component is particularly prone to cracks from the weld and its surrounding areas during use, resulting in Component failure. [0003] In order to solve the hazards of welds to the performance of components, traditional thick plate preparation methods are used to prepare some rolled pieces with different thicknesses. ...

AI Technical Summary

Problems solved by technology

However, the automation and control system requirements of the rolling mill equipment are very high during the preparation process of the differential thickness plate, which seriously limits the application of the differential thickness plate

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