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80-100mm hardenability aluminium alloy with super strength of 690-730Mpa and preparation method thereof

An ultra-high-strength, hardenable technology, applied in the field of aluminum alloy materials, can solve the problem of lack of ultra-high-strength and high-hardenability lightweight aluminum alloys, and achieve the effect of fine grains

Active Publication Date: 2014-08-27
JIANGSU TIANNAN ELECTRIC POWER EQUIP
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Problems solved by technology

[0007] The purpose of the present invention is to solve the current problem of lack of ultra-high strength and high hardenability light aluminum alloys for use, to invent a 690-730MPa ultra-high strength 80-100mm hardenability aluminum alloy 7000 series aluminum alloy, and to provide its preparation method at the same time

Method used

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  • 80-100mm hardenability aluminium alloy with super strength of 690-730Mpa and preparation method thereof
  • 80-100mm hardenability aluminium alloy with super strength of 690-730Mpa and preparation method thereof
  • 80-100mm hardenability aluminium alloy with super strength of 690-730Mpa and preparation method thereof

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Embodiment 1

[0032] Such as figure 1 , 2 shown.

[0033] A 690-730MPa ultra-high strength 80-100mm hardenable aluminum alloy, the preparation method of which is:

[0034] Take 28kg aluminum alloy as an example.

[0035] First, 20.55 kg of A00 grade pure Al (composition: 99.79%Al, 0.14%Fe, 0.04%Si, all components in the present invention are represented by mass percentage, the same below, and the parts where the sum of components is less than 100% are impurities ) after melting, add 1.54 kg Al-Cu (49.62%Al, 50.12%Cu, 0.15%Fe, 0.11%Si ) master alloy (the loss rate of Cu is about 6.25%), 0.53 kg Al-Sr (89.86%Al, 9.89% %Sr, 0.15%Fe, 0.10%Si ) master alloy (the loss rate of Sr is about 75%), 1.64 kg Al-Zr master alloy (95.69%Al, 4.11%Zr, 0.20%Fe, 0.10%Si ) (Zr The loss rate of Zn is about 8%), 3.28 kg of pure Zn (the loss rate of Zn is about 8%), 0.97 kg of pure Mg (the loss rate of Mg is about 20%), and the master alloy can be purchased directly from the market , can also be self-prepared...

Embodiment 2

[0039] Such as image 3 , 4 shown.

[0040] A 700-750MPa grade high-strength 80-100mm grade hardenable aluminum alloy, the preparation method of which is:

[0041] Take 28kg aluminum alloy as an example.

[0042] First, 20.65 kg A00 grade pure Al (ingredients: 99.79%Al, 0.14%Fe, 0.04%Si, all components in the present invention are represented by mass percentage, the same below, and the parts where the sum of components is less than 100% are impurities ) after melting, add 1.35 kg Al-Cu (49.62%Al, 50.12%Cu, 0.15%Fe, 0.11%Si ) master alloy (the loss rate of Cu is about 6.25%), 0.028 kg Al-Sr (89.86%Al, 9.89% %Sr, 0.15%Fe, 0.10%Si ) master alloy (the loss rate of Sr is about 75%), 1.78 kg Al-Zr master alloy (95.69%Al, 4.11%Zr, 0.20%Fe, 0.10%Si ) (Zr The loss rate of Zn is about 8%), 3.51 kg of pure Zn (the loss rate of Zn is about 8%), 1.23 kg of pure Mg (the loss rate of Mg is about 20%), and the master alloy can be purchased directly from the market , can also be self-prepar...

Embodiment 3

[0046] Such as Figure 5-6 shown.

[0047] A 690-730MPa ultra-high strength 80-100mm hardenable aluminum alloy, the preparation method of which is:

[0048] Take 28kg aluminum alloy as an example.

[0049] First, 19.42 kg A00 grade pure Al (composition: 99.79%Al, 0.14%Fe, 0.04%Si, all components in the present invention are represented by mass percentage, the same below, and the parts where the sum of components is less than 100% are impurities ) after melting, add 1.67 kg Al-Cu (49.62%Al, 50.12%Cu, 0.15%Fe, 0.11%Si ) master alloy (the loss rate of Cu is about 6.25%), 0.85 kg Al-Sr (89.86%Al, 9.89% %Sr, 0.15%Fe, 0.10%Si ) master alloy (the loss rate of Sr is about 75%), 1.51 kg Al-Zr master alloy (95.69%Al, 4.11%Zr, 0.20%Fe, 0.10%Si ) (Zr The loss rate of Zn is about 8%), 3.96 kg of pure Zn (the loss rate of Zn is about 8%), 1.11 kg of pure Mg (the loss rate of Mg is about 20%), and the master alloy can be purchased directly from the market , can also be self-prepared by c...

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Abstract

The invention provides 80-100mm hardenability aluminium alloy with the super strength of 690-730Mpa and a preparation method thereof. The 80-100mm hardenability aluminium alloy is characterized by mainly comprising aluminum, zinc, magnesium, copper, zirconium and strontium, wherein the mass percent of the zinc is 10.78-13.01%, the mass percent of the magnesium is 2.78-3.51%, the mass percent of the copper is 2.26-2.80%, the mass percent of the zirconium is 0.204-0.24%, the mass percent of the strontium is 0.0025-0.0751%, and the rest is aluminium and few impurity elements. The preparation method comprises the following steps: (1) casting; (2) carrying out homogenizing annealing (400 DEG C*6h+420 DEG C*6h+440 DEG C*6h+460 DEG C*12h); (3) carrying out hot extrusion (the extrusion ratio is 12); (4) carrying out solution treatment (450 DEG C*2h+460 DEG C*2h+470 DEG C*2h); and (5) carrying out aging treatment (121 DEG C*24h). The aluminium alloy has the advantages that the crystal particles of the aluminium alloy are very small (the average crystal particle size is less than 10 micrometers), the highest actual measurement strength of the aluminium alloy can reach 731 Mpa, meanwhile, the percentage of elongation of the aluminium alloy is 6.6%, the hardness of the aluminium alloy is 231.1HV, the electrical conductivity of the aluminium alloy is 25.9% IACS (International Annealed Copper Standard), and the end-quenching hardenability of the aluminium alloy in water is 80mm.

Description

technical field [0001] The invention relates to an aluminum alloy material, especially a novel 7000 series aluminum alloy and a preparation method thereof, specifically a 690-730MPa ultra-high strength 80-100mm hardenable aluminum alloy and a preparation method thereof. Background technique [0002] High-strength aluminum alloy is an indispensable key pillar material in the development of modern aerospace and weapon equipment. Its development level not only reflects the comprehensive scientific and technological strength of a country, but also an important guarantee for a country's national defense security. For a long time, the development of aluminum alloys with higher strength levels and more balanced and optimized comprehensive properties has always been a high-tech field that is prioritized by countries around the world. [0003] High-strength aluminum alloys have experienced five generations of development, and the overall development direction is generally high-streng...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22C1/03C22F1/053
Inventor 许晓静孙良省蒋伟王宏宇吴瑶邓平安徐驰范亚洲
Owner JIANGSU TIANNAN ELECTRIC POWER EQUIP
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