High-strength corrosion-resistant aluminum alloy, and melting and casting methods thereof

Abstract

The invention discloses a high-strength corrosion-resistant aluminum alloy which is prepared from the following components in percentage by mass: 7.5 to 8.5 percent of Zn, 2.0 to 2.6 percent of Mg, 1.5 to 2.0 percent of Cu, 0.014 to 0.016 percent of Ti, 0.014 to 0.016 percent of B, 0.003 to 0.005 percent of Be, and the balance Al. A casting rod is less in defects, the material performance is improved, and the requirements of the aviation field and the ship field on the mechanical property and the corrosion resistance of the aluminum alloy are met. The invention further discloses a melting method of the high-strength corrosion-resistant aluminum alloy, so that the uniformity degree of the components in the aluminum alloy can be improved, the stability and the compactness of the produced aluminum bars are improved, and redundant impurities are removed; and zircon salt is added during the smelting process, so that the corrosion resistance of the surface of the finished product can be improved. The invention further discloses a casting method of the high-strength corrosion-resistant aluminum alloy, so that the casting efficiency can be improved, the energy consumption is reduced, and the production of wastewater is reduced.

Description

【Technical field】 [0001] The invention relates to a high-strength corrosion-resistant aluminum alloy, and also relates to a melting method and a casting method of the high-strength corrosion-resistant aluminum alloy. 【Background technique】 [0002] Al-Zn-Mg-Cu series aluminum alloy is a high-strength deformable superhard aluminum alloy that can be strengthened by heat treatment. and other fields. [0003] However, in the process of smelting and casting Al-Zn-Mg-Cu aluminum alloys, if the method is improperly selected, many unnecessary defects will be caused in the cast rod, mainly reflected in the unstable mechanical properties of the finished product, coarse grains, Surface corrosion resistance is not strong, etc., so inventing a suitable casting method to reduce the defects of cast rods is very necessary for the smelting field of Al-Zn-Mg-Cu aluminum alloys. 【Content of invention】 [0004] In order to solve the above technical problems, a high-strength corrosion-resist...

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Problems solved by technology

[0003] However, in the process of smelting and casting Al-Zn-Mg-Cu aluminum alloys, if the method is improperly selected, many unnecessary defects will be caused in the cast rod, mainly reflected in the unstable mechanical properties of the finished product, coarse grains, The corrosion resistance of the surface is not strong, so it is very necessary to invent a suitable casting method to reduce the defects of the cast rod for the smelting field of Al-Zn-Mg-Cu aluminum alloy