A scandium-containing ultrahigh-strength aluminum alloy for aerospace and its manufacturing method
An aerospace and manufacturing method technology, applied in the field of aluminum alloy and its manufacturing, can solve the problems of insufficient strength, poor corrosion resistance, fracture toughness and low elongation after fracture of high-strength aluminum alloy plate, and achieve optimal design of alloy composition, The effect of excellent comprehensive performance
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specific Embodiment approach 1
[0029] Embodiment 1: The scandium-containing ultra-high strength aluminum alloy for aerospace in this embodiment is composed of 7.0%-13.5% Zn, 1.5%-2.5% Mg, 0.5%-2.5% Cu, 0.05%-0.30% Zr, 0.01-0.10% Si, 0.01-0.20% Fe, 0.05%-0.50% Mn, 0.01%-0.15% Ti, 0.05%-0.50% Sc and the balance Al are composed of Zr, The sum of the mass fractions of Ti and Sc is less than or equal to 0.65%, and the mass ratio of Cu to Sc is less than or equal to 18.
[0030] This embodiment utilizes the organic combination of plastic deformation and heat treatment precipitation strengthening, so that the alloy has good work hardening and aging strengthening effects at the same time, and the alloy maintains good plasticity and toughness while obtaining higher strength. The first solid solution mainly restores the alloy structure, consumes the deformation energy storage, facilitates subsequent processing and deformation, and at the same time causes the second phase in the alloy to re-dissolve or partially re-di...
specific Embodiment approach 2
[0032] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the ultra-high strength aluminum alloy containing scandium for aerospace is composed of 9.5% Zn, 2.3% Mg, 1.5% Cu, 0.15% Zr, Composition of 0.05% Si, 0.08% Fe, 0.35% Mn, 0.05% Ti, 0.25% Sc and balance Al.
specific Embodiment approach 3
[0033] Embodiment 3: The manufacturing method of the scandium-containing ultra-high-strength aluminum alloy for aerospace in this embodiment is carried out according to the following steps:
[0034] 1. Weigh the raw materials:
[0035]According to the mass fraction, Zn: 7.0%-13.5%, Mg: 1.5%-2.5%, Cu: 0.5%-2.5%, Zr: 0.05%-0.30%, Si: 0.01-0.10%, Fe: 0.01-0.20%, Mn: 0.05% to 0.50%, Ti: 0.01% to 0.15%, Sc: 0.05% to 0.50% and Al as the remainder, and the sum of the mass fractions of Zr, Ti and Sc ≤ 0.65%, the mass ratio of Cu to Sc ≤18 Weigh pure aluminum ingots, pure copper ingots, pure magnesium ingots, pure zinc ingots, aluminum-manganese alloy ingots, aluminum-scandium alloy ingots, aluminum-zirconium alloy ingots, aluminum-titanium alloy ingots, aluminum-silicon alloy ingots and aluminum-iron alloy ingots as raw materials ;
[0036] 2. Preparation of aluminum alloy square ingot:
[0037] The raw materials weighed in step 1 are placed and then smelted in a smelting furnace w...
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Abstract
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