High-strength light Al-Mg-Zn alloy

An al-mg-zn, lightweight technology, applied in the field of light Al-Mg-Zn alloy, high strength, can solve the problems of small reduction in alloy density, low alloy tensile strength, etc.

Inactive Publication Date: 2015-06-10
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

5XXX aluminum alloys (Al-Mg alloys) have more light Mg elements, and the content of relatively high-density elements such as Zn and Cu is very small, so the density of 5XXX aluminum alloys is generally 2.7g/cm 3 Below, but 5XXX aluminum alloy is non-heat-treatable strengthening alloy, the material only has medium strength, and the tensile strength is generally between 250 and 400MPa
However, the patent is mainly applied to automobile panels and h

Method used

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with specific examples, but not limited to the examples.

[0028] The weight percentage of the alloy chemical composition in Examples 1-30 (Table 1, 2) is controlled as: Mg=6.0-10.0%; Zn=3.0-5.0%; Cu<2.0%; Mn<1.2%; Fe<0.3%; <0.3%.

[0029] When Mn=0~0.3%, add at least one of Cr and Ti; add at least one of Zr, Sc, Hf; Cr, Ti, Zr, Sc, Hf single element addition <0.5%; Cr , Ti compound addition amount<0.6%; Zr, Sc, Hf compound addition amount<0.6% (such as: add Cr, Ti, Zr and Sc, wherein Cr, Ti, Zr or Sc<0.5%, Cr+Ti<0.6% , Zr+Sc<0.6%; another example: add Cr, Ti, Zr, Sc and Hf, wherein Cr, Ti, Zr, Sc or Hf<0.5%, Zr+Sc+Hf<0.6%).

[0030] When 0.3

[0031] When Mn=0.6~1.2%, add at l...

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Abstract

The invention discloses a high-strength light Al-Mg-Zn aluminum alloy. The alloy comprises the following chemical components in percentage by weight: 6.0-10.0 percent of Mg, 3.0-5.0 percent of Zn, smaller than 2.0 percent of Cu, smaller than 1.2 percent of Mn, smaller than 0.3 percent of Fe and smaller than 0.3 percent of Si, wherein at least one element of Cr, Ti, Zr, Sc, Hf, La, Ce, Pr and Nd is added; the adding amount of a single element is smaller than 0.5 percent. The density of the Al-Mg-Zn alloy is smaller than 2.7 g/cm<3>; a proper homogenizing process and pressure are adopted for processing; after solid-solution hardening aging treatment is performed, the tensile strength in T6 state is greater than 530 MPa, the elongation rate is greater than 8 percent, and the hardness is greater than 170 HV.

Description

technical field [0001] The invention specifically relates to a high-strength, light-weight Al-Mg-Zn alloy, which can be used for aviation parts, model plates, pressure vessels and other materials, and belongs to the field of metal materials. Background technique [0002] The lightweight of vehicles can greatly reduce the fuel consumption of vehicles and improve the carrying capacity. The lightweight of many components can also facilitate the transportation and use of components. Therefore, lightweight is the current development trend of vehicles and many components. [0003] Aluminum alloys are widely used as aviation materials, ship materials, model plates, pressure vessels, etc. because of their light weight, high strength, and easy forming. Among aluminum alloys, 2XXX (Al-Cu alloy) and 7XXX aluminum alloy (Al-Zn-Mg-Cu alloy) aluminum alloys have relatively high strength, and the tensile strength is mostly above 500MPa, but their density is relatively large, at 2.8g / cm ...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C1/02C22F1/047
Inventor 邓运来戴青松付平韩素琦雷越欧世声张佳琪王冯权刘胜胆张劲唐建国叶凌英张新明
Owner CENT SOUTH UNIV
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