Ultrahigh strength aluminium alloy material and preparation method thereof

An aluminum alloy material and ultra-high-strength technology, applied in the field of aluminum alloy, can solve the problems that do not involve natural aging, and achieve the effects of reducing natural aging time, improving aging power, and increasing solid solubility

Active Publication Date: 2014-12-03
CHINA WEAPON SCI ACADEMY NINGBO BRANCH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aging processes involved in the public reports currently include peak aging, double-stage aging and regressive reaging, and there is no process report involving natural aging

Method used

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  • Ultrahigh strength aluminium alloy material and preparation method thereof
  • Ultrahigh strength aluminium alloy material and preparation method thereof
  • Ultrahigh strength aluminium alloy material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh 84.2kgAl, 12kgZn, 2.4kgMg, 1.0kgCu, 0.2kgZr, 0.1kgMn, 0.1kgNi and put them into the furnace for smelting, among which Cu is Al-50Cu master alloy, Ni is Al-20Ni master alloy, and the rest are pure metals , the smelting process is: put the above-mentioned alloys including Al, Al-50Cu master alloy, and Al-Ni master alloy into the intermediate frequency induction furnace, and add electricity until the metal in the crucible melts, and the temperature of the melt rises to 720°C- Add Zr particles and pure Mn flakes at 740°C, stir fully and raise the melt temperature to 800°C-820°C, press pure Zn and pure Mg with a graphite pressure spoon after power off, stir well, and raise the melt temperature to 720°C-750°C; using refining agent and modifier (0.5% by weight) and C 2 Cl 6 The degassing agent modifies and refines the melt. After the treatment, the slag is removed from the melt, and then the melt is left to stand for 10min-15min, and the temperature of the melt is rais...

Embodiment 2

[0039] Weigh 79.9kgAl, 14kgZn, 3.2kgMg, 1.5kgCu, 0.5kgZr, 0.3kgMn, 0.6kgNi respectively and put them into the furnace, where Cu is Al-50Cu master alloy, Ni is Al-20Ni master alloy, and the rest are pure metals. According to the steps in Example 1, raw material smelting, billet forming, billet deformation, aluminum alloy solution treatment and artificial aging treatment were completed, wherein the artificial intervention natural aging treatment time was 360h and 480h respectively. Figure 6 Microstructure of artificially intervened natural aging state for 360h for spray deposition ultra-high strength aluminum alloy.

[0040] From Figure 6 It can be seen from the figure that there are a large number of GP regions in the artificially-intervened natural aging tissue of 360h, and MgZn 2 (η') phase, the appearance of this phase can make the properties of the alloy reach the peak. The mechanical properties of the alloys with the above two aging times were analyzed, and the results...

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Abstract

The invention relates to an ultrahigh strength aluminium alloy material and a preparation method thereof. The ultrahigh strength aluminium alloy material is characterized by comprising the following concrete components in percentage by weight: 12-14% of Zn, 2.4-3.2% of Mg, 1.0-1.5% of Cu, 0.2-0.5% of Zr, 0.1-0.3% of Mn, 0.1-0.6% of Ni and the balance of Al. The preparation method of the ultrahigh strength aluminium alloy material comprises the following steps: smelting raw materials, moulding a billet, carrying out machining deformation on the billet, carrying out solution treatment for 1 hour at the temperature of 450 DEG C and for 2 hours at the temperature of 475 DEG C, and carrying out manually intervened natural ageing treatment for 240-360 hours at the temperature of 70-80 DEG C. The ultrahigh strength aluminium alloy material is prepared by adopting a spray deposition technology, solution strengthening treatment is carried out on alloy, and aging treatment, carried out for 240-360 hours at the temperature of 70-80 DEG C, instead of the traditional natural ageing treatment is adopted, so that natural ageing time is shortened, and mechanical properties of the alloy are improved; meanwhile, the developed ultrahigh strength alloy is uniform and tiny in structure, has no macrosegregation and has the performances that tensile strength is 780-820MPa, yield strength is 700-740MPa, elongation percentage is 9-13% and fracture toughness property is 30-35MPa.m<1 / 2>, so that overall performance of the ultrahigh strength aluminum alloy material is at the international advanced level.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and in particular relates to an ultrahigh-strength aluminum alloy material developed by a spray deposition process and a preparation method thereof. Background technique [0002] Ultra-high-strength aluminum alloy has the advantages of low density, high strength, superior machining performance, high specific strength, and good corrosion resistance. It is widely used in the aerospace industry and civil technology. It is one of the main structural materials in the aerospace industry. At the same time, it is also widely used in transportation and other industrial sectors. The 7000 series aluminum alloy is a kind of high-strength and high-toughness aluminum alloy material developed and developed internationally in the 1940s with the background of aviation materials. The traditionally used 7000 series aluminum alloy material is generally processed through ingot casting, cold and hot deformatio...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22F1/053
Inventor 章国伟陈伟翟景马力陈刚辛海鹰郭安振
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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