A kind of manufacturing method of aluminum alloy sheet material for portable computer case
An aluminum alloy sheet and portable computer technology, which is applied to the manufacturing field of aluminum alloy sheets for portable computer shells, can solve the problems of oxidation color difference, uneven structure, insufficient processing rate, etc., and achieves no oxidation color difference, uniform structure, and improved strength. Effect
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specific Embodiment approach 1
[0016] Embodiment 1: In this embodiment, a method for manufacturing an aluminum alloy plate for a portable computer casing is carried out according to the following steps:
[0017] 1. According to the mass percentage of elements in the alloy, Si: ≤0.25%, Fe: ≤0.40%, Cu: ≤0.1%, Mn: ≤0.10%, Mg: 2.2%~2.8%, Zn: ≤0.10%, Cr: 0.15% ~ 0.35% and the balance is Al, weigh magnesium ingot, aluminum-chromium master alloy and pure aluminum ingot, in which the elements Fe, Si, Cu, Mn and Zn are impurities; mix and heat the aluminum-chromium master alloy and pure aluminum ingot After reaching 700-720°C, magnesium ingots are added, and after the magnesium ingots are dissolved, the resulting mixed aluminum alloy melt is smelted;
[0018] 2. Casting the molten aluminum alloy obtained in step 1 into an aluminum alloy ingot by a semi-continuous casting method;
[0019] 3. Mill the aluminum alloy ingot obtained in step 3 to remove the surface scale, then set the temperature of the heating furnace ...
specific Embodiment approach 2
[0027] Embodiment 2: This embodiment differs from Embodiment 1 in that: the smelting process described in step 1 is smelting at a temperature of 700-750° C. for 2.5-5 hours to obtain an aluminum alloy melt. Other steps and parameters are the same as those in the first embodiment.
specific Embodiment approach 3
[0028] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that in step 1, the mass percentages of elements in the alloy are Si: 0.06%, Fe: 0.27%, Cu: 0.008%, Mn: 0.02% , Mg: 2.34%, Zn: 0.10%, Cr: 0.22% and the balance is Al, weigh magnesium ingots, aluminum-chromium master alloys and pure aluminum ingots, wherein the elements Fe, Si, Cu, Mn and Zn are impurities. Other steps and parameters are the same as those in Embodiment 1 or 2.
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Abstract
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