Aluminum alloy material and production method of cast-rolling stock of decorative strip of same

Abstract

The invention relates to a 3004 aluminum alloy material and a production method of a cast-rolling stock of a decorative strip of the 3004 aluminum alloy material. The compositions of the aluminum alloy material comprise smaller than or equal to 0.25 percent of Si, 0.20 to 0.60 percent of Fe, 0.10 to 0.15 percent of Cu, 1.0 to 1.20 percent of Mn, 0.85 to 1.25 percent of Mg, smaller than or equal to 0.05 percent of Ti, and the remaining amount of Al. The production method comprises the steps of smelting, refining, on-line degassing, grain refinement, filtration, cast rolling, and the like; during the smelting, 50 percent to 60 percent of electrolytic aluminum liquid and the rest of aluminum alloy waste materials are mixed and smelted; the compositions except Mg are added to the mixture; and after the steps of powder injection refining, slag skimming, magnesium ingot adding, furnace turning-down and refining are conducted, the stock of the strip is cast-rolled. A product of the production method has even and steady chemical compositions and can satisfy the mechanical property requirements of subsequent rolling, so that the yield of subsequent rolling is increased; by using the aluminum alloy waste materials as raw materials, the raw materials are saved; by directly adding the electrolytic aluminum liquid, gas loss in the melting process is reduced, and burning loss in the waste material melting process can also be decreased; and by using a cast-rolling manner to replace a hot-rolling manner, the process is simplified and the production cost is greatly reduced.

Description

Technical field [0001] The present invention involves an aluminum alloy material, especially the production method of casting and rolling materials for aluminum alloy materials and its decorative band materials. Background technique [0002] The 3004 aluminum alloy belt material has excellent mechanical properties, suitable for places with large spans and high pressure. Its application range in decorative band materials is wide and the amount is large.However, the decorative belt is mainly used for cast rolling billets for 1 series and 8 series alloys, because the high content of 3004 aluminum alloy impurities has a high content, which causes its crystal temperature range to be 25 ° C, which is higher than the crystal temperature range of ordinary 1 series, 8011 alloy and 3003 alloy.14 ° C is twice the temperature of its temperature, which causes the liquid acupoints in the cast and rolling area to grow and have poor liquidity, resulting in 3004 alloys in the process of casting a...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a 3004 aluminum alloy decorative strip casting and rolling with short process and high yield in view of the problems of segregation, transverse ripple and color difference in the production process of 3004 aluminum alloy casting and rolling in the prior art Billet production method