Magnesium lithium alloy

A magnesium-lithium alloy and magnesium source technology, applied in the field of magnesium alloys, can solve the problems of poor strength and rigidity of magnesium-lithium alloy materials, and achieve the effects of good corrosion resistance, high rigidity and good stability

Inactive Publication Date: 2013-04-10
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the magnesium-lithium alloy material has poor strength and rigidity, and a high-strength, high-rigidity magnesium-lithium alloy is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] A preparation method for a magnesium-lithium alloy: comprising the steps of:

[0022] (1) Weighing: Weigh magnesium source, lithium source, aluminum source, zinc source, calcium source, manganese source, and scandium source according to the proportion;

[0023] (2) Melting: put the alloy raw material in step (1) into a vacuum induction furnace, pump the induction furnace to a vacuum, fill it with protective gas to 1 atm, and melt at 800-810°C;

[0024] (3) Casting: pouring the alloy liquid in step (2) under the protective environment of protective gas to obtain cast magnesium alloy;

[0025] (4) Heat treatment: the as-cast magnesium alloy is kept at 300-350°C for 21-27h for homogenization heat treatment, and then extruded or rolled at 200-300°C.

[0026] In the preparation method of the magnesium-lithium alloy provided by the present invention, each element source is smelted in a vacuum environment filled with a protective gas; preferably, the protective gas is argon. ...

Embodiment 1

[0031] Composition and mass percentage of magnesium-lithium alloy: Li is 12 wt %, Al is 6 wt %, Zn is 1 wt %, calcium is 0.01 wt %, Mn is 0.01 wt %, Sc is 1 wt %, and the balance is Mg ; Impurity elements Cu<0.01 wt %, Fe<0.005 wt %, Ni<0.005 wt %.

[0032] The preparation method of magnesium lithium alloy, following steps:

[0033] (1) Weighing: Weigh industrially pure magnesium ingots, magnesium-lithium master alloys, industrially pure aluminum ingots, industrially pure zinc ingots, magnesium-calcium master alloys, aluminum-manganese master alloys, and scandium alloys according to the above proportions;

[0034] (2) Melting: After decontaminating the surface of the alloy raw material in step (1), put it into a vacuum induction furnace, evacuate the induction furnace to a vacuum, fill it with argon to 1 atm, and melt at 805°C;

[0035] (3) Casting: pouring the alloy liquid in step (2) into a copper mold coated with acetylene under the protective environment of argon gas to o...

Embodiment 2

[0038] Other experimental conditions are the same as in Example 1, and the difference from Example 1 is: the composition and mass percentage of the magnesium-lithium alloy: Li is 8 wt %, Al is 7 wt %, Zn is 3 wt %, and Ca is 0.2 wt % , Mn is 0.2 wt %, Sc is 2 wt %, and the balance is Mg; control impurity elements Cu<0.01 wt %, Fe<0.005 wt %, Ni<0.005 wt %.

[0039] The magnesium-lithium alloy H2 is obtained.

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Abstract

The invention discloses a magnesium lithium alloy, which comprises the following ingredients by content: 8-12wt% of Li, 6-8wt% of Al, 1-3wt% of Zn, 0.01-0.2wt% of Ca, 0.01-0.2wt% of Mn, 1-2wt% of Sc and the balance of Mg; wherein the impurity element Cu is less than 0.01wt%, Fe is less than 0.005wt% and Ni is less than 0.005wt%. On the basis of addition of Al and Zn, Ca, Mn and Sc-containing RE are added, the Al is a main intensify element of the alloy, Zn is the intensify element of the alloy, the plasticity of the alloy is simultaneously changed, the non continuous deposition of a strengthening phase Mg17Al12 can be inhibited, thereby slipping of a crystal boundary is inhibited, and the alloy strength is enhanced.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloys, in particular to a magnesium-lithium alloy. Background technique [0002] Magnesium-lithium alloy is a new type of alloy, which is as light as plastic and as strong as metal, and its deformability (forgeability) is better than other magnesium alloys, and magnesium-lithium alloy has good shock absorption performance and resistance to high-energy particle penetration, so It has very broad development prospects in the fields of communication electronics industry, military industry and aerospace industry. [0003] At present, the strength of magnesium-lithium alloys is low, and the aging stability and corrosion resistance are poor, which restricts the development of magnesium-lithium alloys; and to address these defects, alloying methods are usually used to improve alloy properties. The most commonly used strengthening elements are Al, Zn and rare earth and other strengthening elements. Alt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C23/02C22C1/03C22F1/06
Inventor 施发满高宽王长振朱俊虹
Owner BYD CO LTD
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