High-strength corrosion resistant Al-Zn-Mg series aluminum alloy and preparation method thereof
An aluminum alloy and anti-corrosion technology, which is applied in the field of high-strength, toughness, anti-corrosion Al-Zn-Mg series aluminum alloys and its preparation, can solve problems such as fracture toughness and corrosion resistance limitations, and achieve excellent corrosion resistance and high fracture toughness , Improve the effect of fracture toughness and corrosion resistance
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[0028] The method for preparing the high-strength, corrosion-resistant Al-Zn-Mg aluminum alloy of the present invention is characterized by including the following steps:
[0029] The first step: select Al-20Cu alloy, Al-20Mn alloy, Al-10Cr alloy, Al-10Er alloy, Al-5Ti-1B alloy wire and aluminum ingot with purity of 99.7%, zinc ingot with purity of 99.9%, purity 99.9% magnesium ingot as raw material;
[0030] Step 2: Heat and melt the aluminum ingot at 770~780℃, and then add 5.6~5.9% of the total weight of the raw material zinc ingot, 0.5~0.8% of magnesium ingot, 1.5~2.5% of Al-20Cu alloy, 2~ 3% Al-20Mn alloy, 2~3% Al-10Cr alloy and 2~3% Al-10Er alloy, stir and melt into aluminum alloy liquid;
[0031] The third step: spray refining the aluminum alloy liquid in the furnace with hexachloroethane refining agent for 10-15 minutes, and then stand for 30-40 minutes after slagging;
[0032] Step 4: Introduce the aluminum alloy liquid in the furnace into the launder, and add 0.4-0.6% of the...
Embodiment 1
[0045] Aluminum alloy is composed of the following components by mass percentage: Zn 5.6%, Mg 0.8%, Cu 0.5%, Mn 0.4%, Cr 0.2%, Er 0.2%, Ti 0.03%, B 0.006%, Fe≤0.15%, Si≤0.1 %, the balance is Al and other unavoidable impurities, the individual content of unavoidable other impurities is ≤0.05%, and the total amount is ≤0.15%; the preparation method includes the following steps:
[0046] The first step: select Al-20Cu alloy, Al-20Mn alloy, Al-10Cr alloy, Al-10Er alloy, Al-5Ti-1B alloy wire and aluminum ingot with purity of 99.7%, zinc ingot with purity of 99.9%, purity 99.9% magnesium ingot as raw material;
[0047] Step 2: Heat and melt the aluminum ingot at 770℃, and then add 5.6% zinc ingot, 0.8% magnesium ingot, 2.5% Al-20Cu alloy, 2% Al-20Mn alloy, 2% of the total weight of raw materials. Al-10Cr alloy and 2% Al-10Er alloy are stirred and melted into aluminum alloy liquid;
[0048] The third step: use 0.5% of the total weight of raw materials to spray and refine the aluminum allo...
Embodiment 2
[0056] The aluminum alloy is composed of the following mass percentage components: Zn 5.8%, Mg 0.6%, Cu 0.4%, Mn 0.5%, Cr0.25%, Er 0.25%, Ti 0.02%, B 0.004%, Fe≤0.15%, Si≤ 0.1%, the balance is Al and other unavoidable impurities, the individual content of unavoidable other impurities is ≤0.05%, and the total amount is ≤0.15%; the preparation method includes the following steps:
[0057] The first step: select Al-20Cu alloy, Al-20Mn alloy, Al-10Cr alloy, Al-10Er alloy, Al-5Ti-1B alloy wire and aluminum ingot with purity of 99.7%, zinc ingot with purity of 99.9%, purity 99.9% magnesium ingot as raw material;
[0058] Step 2: Heat and melt the aluminum ingot at 775℃, and then add 5.8% zinc ingot, 0.6% magnesium ingot, 2% Al-20Cu alloy, 2.5% Al-20Mn alloy, 2.5% of the total weight of raw materials. Al-10Cr alloy and 2.5% Al-10Er alloy are stirred and melted into aluminum alloy liquid;
[0059] The third step: use 0.5% of the total weight of the raw materials to spray and refine the alu...
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