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Mg-Li-Al-Zn-Y-based cast magnesium-lithium alloy and heat treatment method thereof

A heat treatment method and magnesium-lithium alloy technology, which is applied in the field of Mg-Li-Al-Zn-Y cast magnesium-lithium alloy and its heat treatment, magnesium-lithium alloy and its heat treatment field, can solve the problems of patent reports and no heat treatment process, etc. , to achieve the effects of improving mechanical properties, optimizing structure and performance, improving strength and thermal stability

Active Publication Date: 2018-08-28
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for cast magnesium-lithium alloys, there is no patent report on the heat treatment process

Method used

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  • Mg-Li-Al-Zn-Y-based cast magnesium-lithium alloy and heat treatment method thereof
  • Mg-Li-Al-Zn-Y-based cast magnesium-lithium alloy and heat treatment method thereof

Examples

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Embodiment 1

[0024] This embodiment relates to a Mg-Li-Al-Zn-Y cast magnesium-lithium alloy, the alloy contains the following components in mass percentage: Li 8%, Al 3%, Zn 2.2%, Y 1%, Zr 0.5%, Ti 0.03%, the balance is Mg and unavoidable impurities. Under the protection of flux or gas, the components of the Mg-Li-Al-Zn-Y cast magnesium-lithium alloy are melted in proportion, and then the temperature is raised to 700 ° C, mechanically stirred for 5 minutes, kept for 6 minutes, and then cast. Sampling was taken from the as-cast alloy, and tensile samples were processed according to the national standard GB228-2002, and the mechanical properties were tested.

[0025] This embodiment also relates to the heat treatment method of the aforementioned Mg-Li-Al-Zn-Y series cast magnesium-lithium alloy: the method includes the following steps: Step 1, the Mg-Li-Al-Zn-Y series cast magnesium The lithium alloy is subjected to two-stage solid solution treatment under a gas protection atmosphere, solid...

Embodiment 2

[0031] This embodiment relates to a Mg-Li-Al-Zn-Y cast magnesium-lithium alloy, the alloy contains the following components in mass percentage: Li 5%, Al 2%, Zn 1%, Y 1.3%, Zr 0.2%, Ti 0.05%, the balance is Mg and unavoidable impurities. Under the protection of flux or gas, the components of the Mg-Li-Al-Zn-Y cast magnesium-lithium alloy are melted in proportion, and then the temperature is raised to 700 ° C, mechanically stirred for 5 minutes, kept for 6 minutes, and then cast. Sampling was taken from the as-cast alloy, and tensile samples were processed according to the national standard GB228-2002, and the mechanical properties were tested.

[0032] This embodiment also relates to the heat treatment method of the aforementioned Mg-Li-Al-Zn-Y series cast magnesium-lithium alloy: the method includes the following steps: Step 1, the Mg-Li-Al-Zn-Y series cast magnesium The lithium alloy is subjected to two-stage solid solution treatment under a gas protection atmosphere, solid...

Embodiment 3

[0038]This embodiment relates to a Mg-Li-Al-Zn-Y cast magnesium-lithium alloy, the alloy contains the following components in mass percentage: Li 10%, Al 4%, Zn 3%, Y 2%, Zr 0.8%, Ti 0.01%, the balance is Mg and unavoidable impurities. Under the protection of flux or gas, the components of the Mg-Li-Al-Zn-Y cast magnesium-lithium alloy are melted in proportion, and then the temperature is raised to 700 ° C, mechanically stirred for 5 minutes, kept for 6 minutes, and then cast. Sampling was taken from the as-cast alloy, and tensile samples were processed according to the national standard GB228-2002, and the mechanical properties were tested.

[0039] This embodiment also relates to the heat treatment method of the aforementioned Mg-Li-Al-Zn-Y series cast magnesium-lithium alloy: the method includes the following steps: Step 1, the Mg-Li-Al-Zn-Y series cast magnesium The lithium alloy is subjected to two-stage solid solution treatment under a gas protection atmosphere, solid s...

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Abstract

The invention discloses Mg-Li-Al-Zn-Y-based cast magnesium-lithium alloy and a heat treatment method thereof. The magnesium-lithium alloy comprises, by mass, 5-10% of Li, 2-4% of Al, 1-3% of Zn, 1-2%of Y, 0.2-0.8% of Zr, 0-0.05% of Ti, and the balance Mg and unavoidable impurities. By introducing Al and Y to form an Al2Y heat-resistant strengthening phase, the strength and thermal stability of the magnesium-lithium alloy can be significantly improved; meanwhile, by adding Zn, solid solution strengthening can be promoted; by adding trace Zr and Ti, the effect of refining grains can be achieved. The invention also relates to the heat treatment method of the magnesium-lithium alloy. The method comprises the steps of two-stage solid solution treatment and aging treatment, wherein solid solution treatment is performed at 280-420 DEG C for 2-8 hours, then solid solution treatment is performed at 200-270 DEG C for 0-16 hours, and water cooling is performed; finally, aging is performed at 50-150 DEG C for 0-40 hours, and air cooling is performed. The magnesium-lithium alloy is simple in process and can be applied to the fields of aviation, aerospace, military industry, electronics and thelike.

Description

technical field [0001] The invention relates to a magnesium-lithium alloy in the field of metal structural materials and a heat treatment method thereof, in particular to a Mg-Li-Al-Zn-Y cast magnesium-lithium alloy and a heat treatment method thereof. Background technique [0002] Magnesium-lithium alloy is currently the metal structure material with the smallest density, which is 1 / 4 to 1 / 3 lighter than ordinary magnesium alloy and 1 / 3 to 1 / 2 lighter than aluminum alloy, so it is also called ultra-light alloy. Magnesium-lithium alloy has many advantages, such as high specific strength, specific stiffness, excellent shock resistance, good electromagnetic shielding ability and cutting processing ability, etc. It is ideal for aerospace, weapon industry, automobile, 3C industry, medical equipment and other fields. One of the structural materials. [0003] The low absolute strength of magnesium-lithium alloys is one of the important reasons restricting the application of magne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C1/03C22F1/06
CPCC22C1/03C22C23/00C22F1/06
Inventor 冀浩刘文才吴国华彭翔张亮李中权肖旅王先飞
Owner SHANGHAI JIAO TONG UNIV
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