A method for preparing high-strength aluminum alloy sheet for thinning and deep drawing

Abstract

The invention belongs to the technical field of processing aluminum alloy plates, strips and foils, and in particular relates to a preparation method for producing high-strength aluminum alloy plates for thinning and deep drawing by using casting and rolling slabs. The invention discloses a method for preparing an aluminum alloy plate for high-strength thinning and deep drawing. The specific steps are as follows: industrial aluminum ingots, Fe agent, Si agent, copper agent, magnesium ingot, etc. are used as raw materials to prepare aluminum alloys, which are melted and refined. , stand still, add titanium wire, cast and roll after online deslagging and degassing, and process it into a cast-rolled slab blank coil; perform homogenization annealing when the blank coil is cold-rolled, and the annealing is carried out in a nitrogen annealing furnace, and then the coil Perform intermediate annealing, and finally cold rolling to a finished product thickness of 0.5mm. The aluminum alloy plate prepared by the invention has high tensile strength, low earing rate, controllable surface roughness, satisfies good deep drawing and thinning performance, and improves the utilization rate of the material at the same time. The casting and rolling billet produced by the present invention can reduce the cost by about 20% compared with the existing commonly used hot-rolled plate, and has broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of processing aluminum alloy plates, strips and foils, and in particular relates to a method for preparing high-strength aluminum alloy plates for thinning and deep drawing. Background technique [0002] As the country promotes the construction of an energy-saving and resource-saving society, the lightweight of automobiles and the development of new energy vehicles, the application of aluminum materials in automobiles is increasing. The key to new energy vehicles is the development of power batteries. The current problems that need to be solved in the power battery industry are concentrated in: the energy density of batteries cannot be low, the battery life cannot be short, the ability to control battery costs must be strengthened, and the weight of batteries must be reduced. . One of the important materials for the production of power batteries is aluminum. Mainly used for battery case, battery lug, batte...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for producing high-strength thinning and deep drawing aluminum alloy plates by using cast-rolled slabs, so that it can adapt to the high-efficiency deep drawing and deep drawing thinning process and quality requirements of battery shells, so as to overcome the problems in the prior art. The cost of producing battery shells is high, the strength of the plates used is low, the internal structure of the alloy is difficult to control, and the surface quality of the plates is difficult to meet the high-volume and high-efficiency production.

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