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Ultra-strength, high-toughness and high-elongation 7XXX series aluminum alloy and preparation process thereof

A technology of preparation process and elongation, which is applied in the field of aluminum alloys, can solve the problems of decreased corrosion resistance and fracture toughness of alloys, reduced material reliability, and weakened application range, etc., so as to reduce the introduction of impurities, reduce the degree of alloying, increase Effect of Alloy Machinability

Active Publication Date: 2019-01-04
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the main method to further improve the strength of 7XXX series aluminum alloys is to increase the content of zinc and magnesium main alloying elements and increase the density of intragranular precipitated phases. reliability
In addition, due to the high-strength characteristics of 7XXX aluminum alloy, its processing performance is poor, and its forming cost is high, which weakens its application range.

Method used

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  • Ultra-strength, high-toughness and high-elongation 7XXX series aluminum alloy and preparation process thereof

Examples

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Embodiment 1

[0030] A super-strength, high-toughness and high-elongation 7XXX series aluminum alloy, the composition of each component of the alloy is as follows: zinc (Zn) 8.5%, magnesium (Mg) 2.13%, copper (Cu) 1.5%, Zirconium (Zr) 0.11%, titanium (Ti) 0.03%, the rest is aluminum (Al) and impurities with each content less than 0.1%.

[0031] The preparation process of the super-strength, high-toughness and high-elongation 7XXX series aluminum alloy is: batching→feeding→melting→component detection→melt purification→hydrogen content measurement→casting→homogenization treatment→hot extrusion→solution treatment→aging Processing, the specific operation steps are as follows:

[0032] Step 1, ingredients: the materials used are high-purity aluminum (99.95%), industrial pure zinc (99.95%), industrial pure magnesium (99.99%), aluminum-copper master alloy (copper content accounts for 50%), aluminum-zirconium master alloy ( Zirconium content accounts for 5%), titanium agent (titanium content accou...

Embodiment 2

[0043] A super-strength, high-toughness and high-elongation 7XXX series aluminum alloy, the composition of each component of the alloy is as follows: zinc (Zn) 8.7%, magnesium (Mg) 2.16%, copper (Cu) 1.5%, Zirconium (Zr) 0.15%, titanium (Ti) 0.05%, and the rest are aluminum (Al) and impurities with each content less than 0.1%.

[0044] The preparation process of the super-strength, high-toughness and high-elongation 7XXX series aluminum alloy is: batching→feeding→melting→component detection→melt purification→determination of hydrogen content→casting→homogenization treatment→hot extrusion→solution treatment→aging treatment , the specific operation steps are as follows:

[0045]Step 1, ingredients: the materials used are high-purity aluminum (99.95%), industrial pure zinc (99.95%), industrial pure magnesium (99.99%), aluminum-copper master alloy (copper content accounts for 50%), aluminum-zirconium master alloy ( Zirconium content accounts for 5%), titanium agent (titanium cont...

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Abstract

The invention relates to an ultra-strength, high-toughness and high-elongation 7XXX series aluminum alloy and a preparation process thereof. The aluminum alloy comprises the following raw materials inpercentage by weight: 8.5-9.2% of Zn, 2.2-2.4%% of Mg, 1-1.6% of Cu, 0.1-0.2% of Zr, 0-0.05% of Ti, 0-0.1% of impurities and the balance of Al. In the invention, for the 7XXX series aluminum alloy, the strength is 640-700MPa, the elongation is 12-16%, and a problem that the high strength and the high elongation of existing aluminum alloy products are difficult to achieve simultaneously is solved.

Description

technical field [0001] The invention relates to a super-strength, high-toughness and high-elongation 7XXX aluminum alloy and a preparation process thereof, belonging to the technical field of aluminum alloys. Background technique [0002] Aluminum alloy has the advantages of low density, high strength, and good processing performance, and is widely used in aerospace and other industries. Especially with the rapid development of the national aerospace and national defense construction fields, the performance requirements for structural materials are constantly improving. Compared with traditional The 2xxx aluminum alloys and Al-Li alloys, and the 7xxx series aluminum alloys have the characteristics of high strength, low density and good corrosion resistance, which make them widely used in the aerospace field. [0003] At present, the main means to further improve the strength of 7XXX series aluminum alloys is to increase the content of zinc and magnesium main alloying element...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/03C22F1/053
CPCC22C1/026C22C1/03C22C21/10C22F1/002C22F1/053
Inventor 黄元春邹倜陈斯卓张传超马云龙
Owner CENT SOUTH UNIV
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