Preparation purification treatment method for aluminum foil blanks and purification effect evaluation method

Abstract

The invention discloses a preparation purification treatment method for aluminum foil blanks and a purification effect evaluation method. The preparation purification treatment method includes the steps that first purification treatment is performed, specifically, the aluminum foil blanks are put into a smelting furnace, a purifying agent and a refining agent are added to bring aluminum slag out of the surface of aluminum liquid, heat preservation is performed after uniform melting, then a degasifier is added, and after standing, first slag removal is carried out; secondary purification treatment is performed, specifically, the purifying agent is sprinkled into the aluminum liquid after the first slag removal and stirring is performed at the same time, and after standing, secondary slag removal is carried out; pouring treatment is performed, specifically, the aluminum liquid after the secondary purification treatment is poured; homogenization treatment is performed, specifically, the poured aluminum foil blanks are subjected to homogenizing annealing treatment; and thermoplastic deformation treatment is performed, specifically, measurement of impurity content, measurement of impurity removal rate and measurement of an average grain size are performed. Through the preparation purification treatment method, the original structure and the thermal compression deformation structuremorphology of the aluminum foil blanks are more effectively improved, and the mechanical properties of aluminum foil blank materials are ultimately improved, so that the aluminum foil blanks are highin purity and less in impurity, and grain structures are small in size and uniform in distribution.

Description

technical field [0001] The invention relates to the field of forming control of non-ferrous alloys, in particular to a preparation and purification treatment of aluminum foil blanks and a method for evaluating the purification effect. Background technique [0002] Aluminum foil blanks are pure aluminum alloys, typically represented by 1235 aluminum alloys, with a purity greater than 99.0% (mass), in which Si and Fe are the main alloying elements, which are mainly used in aluminum foil products, which are produced by pressure processing The aluminum and aluminum alloy plates and strips with a thickness less than 0.2mm are widely used in food packaging, containers, construction and other fields. This alloy has the lowest strength (among aluminum alloys) and cannot be strengthened by heat treatment, so the cold working method is used to improve its mechanical properties: it has high plasticity in the annealed state, good plasticity in semi-cold work hardening, and low plasticit...

AI Technical Summary

Problems solved by technology

This purification treatment process is mostly operated manually, with low degassing rate and incomplete refining. During the transportation of molten aluminum from the holding furnace to the casting machine, the molten aluminum will be polluted again, so the material itself has many defects, such as inclusions , porosity, and microcracks, etc., affect plastic deformation and increase the reject rate; secondly, the grain structure of the material is coarse, and the structure is uneven during thermal processing. The deep drawing process is prone to ear making, and the plastic deformation performance is poor.

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