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7055 aluminum alloy in high intensity, and high toughness, and preparation method

A high-strength, high-toughness, aluminum alloy technology, applied in the field of aluminum alloy and its preparation process, can solve the problems of small ingot size, elongation rate not exceeding 5%, and can not meet the needs of aviation and aerospace industries, so as to reduce the tendency of cracks, The effect of improving the compressive strength

Active Publication Date: 2007-10-10
NORTHEAST LIGHT ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a high-strength and high-toughness 7055 aluminum alloy to solve the problem that the strength of the existing 7055 aluminum alloy is only about 500MPa, the elongation is not more than 5%, and the specification of the ingot is small, which cannot meet the needs of the aviation and aerospace industries. Aluminum alloy and its preparation method

Method used

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specific Embodiment approach 1

[0007] Specific Embodiment 1: The high-strength and high-toughness 7055 aluminum alloy of this embodiment consists of Si: 0.1%, Fe: 0.15%, Cu: 2-2.6%, Mn: 0.05%, Mg: 1.8-2.3%, Cr: 0.04%, Ti: 0.06%, Zr: 0.08-0.2%, Zn: 7.6-8.4%, impurity 0.1%, and the balance made of Al.

specific Embodiment approach 2

[0008] Specific embodiment 2: In this embodiment, the weight percentage of Cu is 2.3% of the total weight of the high-strength and high-toughness 7055 aluminum alloy, that is, the high-strength and high-toughness 7055 aluminum alloy consists of Si: 0.1%, Fe: 0.15%, and Cu: 2.3% by weight percentage , Mn: 0.05%, Mg: 1.8-2.3%, Cr: 0.04%, Ti: 0.06%, Zr: 0.08-0.2%, Zn: 7.6-8.4%, impurities 0.1% and the balance are made of Al.

specific Embodiment approach 3

[0009] Specific Embodiment Three: In this embodiment, the weight percentage of Mg is 2.1% of the total weight of the high-strength and high-toughness 7055 aluminum alloy, that is, the high-strength and high-toughness 7055 aluminum alloy consists of Si: 0.1%, Fe: 0.15%, and Cu: 2.3% by weight percentage , Mn: 0.05%, Mg: 2.1%, Cr: 0.04%, Ti: 0.06%, Zr: 0.08-0.2%, Zn: 7.6-8.4%, impurities 0.1% and the balance are made of Al.

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Abstract

This invention relates to a method for preparing high-strength and high-toughness 7055 Al alloy. Present 7055 Al alloy has strength of only 500 MPa, and elongation at breakage of only 5%. The high-strength and high-toughness 7055 Al alloy is prepared from: Si 0.1 wt.%, Fe 0.15 wt.%, Cu 2-2.6 wt.%, Mn 0.05 wt.%, Mg 1.8-2.3 wt.%, Cr 0.04 wt.%, Ti 0.06 wt.%, Zr 0.08-0.2 wt.%, Zn 7.6-8.4 wt.%, impurities 0.1 wt.%, and Al as balance. The strength of the high-strength and high-toughness 7055 Al alloy is greater than or equal to 610 MPa (100 MPa more than other 7055 Al alloys), and the elongation at breakage is greater than or equal to 6% (1% more than other 7055 Al alloys). The method can cast Phi 405X1000 mm and Phi 360X1000 mm ingots of the high-strength and high-toughness 7055 Al alloy.

Description

technical field [0001] The invention relates to an aluminum alloy and a preparation process thereof. Background technique [0002] The strength of the existing 7055 aluminum alloy is only about 500MPa, and the elongation rate is not more than 5%, and the specification of the ingot is small, which cannot meet the needs of the aviation and aerospace industries. The main reason for the above problems is that the composition of the existing 7055 aluminum alloy is not reasonable enough, and the preparation process of the 7055 aluminum alloy still has defects. Contents of the invention [0003] The purpose of the present invention is to provide a high-strength and high-toughness 7055 aluminum alloy to solve the problem that the strength of the existing 7055 aluminum alloy is only about 500MPa, the elongation is not more than 5%, and the specification of the ingot is small, which cannot meet the needs of the aviation and aerospace industries. Aluminum alloy and its preparation m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/02C22C1/06B22D21/04
Inventor 王凤春李念奎单长智王志超王国军陶志民
Owner NORTHEAST LIGHT ALLOY CO LTD
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