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Al-Mg-Zn alloy

An al-mg-zn alloy technology, applied in the field of Al-Mg-Zn alloy, can solve the problems of quenching sensitivity, low strength, and large difference in the performance of the center of the material, etc., and achieve the effect of good hardenability

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

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Problems solved by technology

[0002] 7XXX aluminum alloy (Al-Zn-Mg-Cu alloy) has high strength, and the tensile strength in T6 state is generally above 500MPa, but its density is relatively high at 2.8g / cm 3 Above, and there are many problems of quenching sensitivity, which makes the center position of the material different from the external performance.
However, the tensile strength of the material in this patent is below 420MPa, and the strength is low

Method used

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with 8 specific embodiments, but not limited to the illustrated embodiments.

[0030] In each embodiment, the weight percentage of alloy chemical composition is controlled as follows: Mg=6.0~10.0%; Zn=3.0~5.0%; Cu<2.0%; Mn<0.5%; Fe<0.3%; Si<0.3%; Addition of various elements < 0.5%, total compound addition < 0.8% (such as: adding Zr or Sc < 0.5% alone; or adding Zr and Sc in combination, wherein Zr < 0.5%, Sc < 0.5%, Zr+Sc < 0.8 %); inevitably there are other impurity elements, the single impurity element does not exceed 0.05%, the total amount of impurities does not exceed 0.2%, and the balance is Al; Zn / Mg=0.48~0.62.

[0031]In order to reflect the superiority of the material performance, the weight percentage of the alloy chemical composition in the embodiment is further controlled within the preferred range: Mg=7.0-9.0%; Zn=3.5-4.5%; Cu<1.5%; Mn<0.3%; Fe< 0.15%; Si<0.1%; Zr, Sc single element ad...

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Abstract

The invention discloses Al-Mg-Zn aluminum alloy. The Al-Mg-Zn aluminum alloy comprises 6.0-10.0% of Mg, 3.0-5.0% of Zn, 2.0% of Cu and lt, 0.5% of Mn and lt, 0.3% of Fe and lt, 0.3% of Si and lt, less than or equal to 0.5% of each of Zn, S and c or less than or equal to 0.8% of the compound of the Zn, S and c, less than or equal to 0.05% of each of the other impurity elements, and rest of Al, wherein the total weight of the impurities is less than or equal to 0.2%, and the weight ratio of Zn to Mg is 0.48-0.62. The Al-Mg-Zn alloy has high intensity, good plasticity, low density and low quenching sensitivity. The intensity of the material (component) prepared by the alloy is larger than or equal to 500 Mpa under T6, the room temperature elongation percentage of the material is larger than or equal to 10%, and the density is lower than or equal to 2.7 g / cm3.

Description

technical field [0001] The invention specifically relates to an Al-Mg-Zn alloy, which can be used for materials such as aircraft wing ribs, aircraft wing beams, aircraft frames, aircraft fuselage plates, armor plates, model plates, and pressure vessels. Background technique [0002] 7XXX aluminum alloy (Al-Zn-Mg-Cu alloy) has high strength, and the tensile strength in T6 state is generally above 500MPa, but its density is relatively high at 2.8g / cm 3 Above, and there are many problems of quenching sensitivity, which makes the difference between the central position of the material and the external performance. The 7085 aluminum alloy with better overall performance has relatively low quenching sensitivity, but its density is greater than 2.85g / cm 3 . The density of 5XXX aluminum alloy (Al-Mg alloy) is 2.7g / cm 3 Below, and the problem of quenching sensitivity is extremely small, but 5XXX aluminum alloy is a non-heat-treatable strengthening alloy, which only has medium stre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/06C22C21/08C22F1/047
CPCC22C21/06C22C21/08C22F1/047
Inventor 邓运来戴青松欧世声雷越韩素琦张佳琪付平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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