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Additive Ag reinforced magnesium-lithium alloy

A technology of magnesium-lithium alloy and alloy, applied in the field of alloy

Inactive Publication Date: 2009-04-08
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although scholars at home and abroad have done a lot of research on magnesium-lithium alloys, the literature on adding Ag to enhance the properties of magnesium-lithium alloys has not yet been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The composition and weight percentage of the magnesium-lithium alloy are: Li: 8%, Al: 3%, Zn: 1%, Ag: 0.2%, and the balance is Mg. Melting takes place in a vacuum induction melting furnace. Before smelting, first evacuate the furnace to a vacuum state, then fill it with protective gas (argon), and then start smelting (the whole smelting process is under the protection of argon gas), and the smelted melt is cast into a metal mold to obtain cast state alloy. The obtained as-cast alloy is homogenized at 350±10° C., and then deformed (extruded or rolled) to obtain a deformed alloy. The deformed alloy is tested for its mechanical properties on an electronic universal testing machine, and the density of the alloy is tested by the Archimedes method.

[0014] At room temperature, the obtained magnesium-lithium alloy has a tensile strength of 205MPa, a yield strength of 180MPa, an elongation of 20%, and an impact toughness of 330KJ / m 2 , the density is: 1.40g / cm 3 ; At 150°C...

Embodiment 2

[0016] Other experimental conditions are the same as in Example 1. The composition and weight percentage of the magnesium-lithium alloy are: Li: 8%, Al: 2.5%, Zn: 1.5%, Ag: 0.5%, and the balance is Mg. The deformed alloy is tested for its mechanical properties on an electronic universal testing machine, and the density of the alloy is tested by the Archimedes method.

[0017] At room temperature, the obtained magnesium-lithium alloy has a tensile strength of 210MPa, a yield strength of 189MPa, an elongation of 22%, and an impact toughness of 420KJ / m 2 , the density is: 1.44g / cm 3 ; At 150°C, tensile strength: 165MPa, yield strength: 145MPa, elongation: 18%.

Embodiment 3

[0019] Other experimental conditions are the same as in Example 1. The composition and weight percentage of the magnesium-lithium alloy are: Li: 8%, Al: 3.5%, Zn: 1.5%, Ag: 1%, and the balance is Mg. The deformed alloy is tested for its mechanical properties on an electronic universal testing machine, and the density of the alloy is tested by the Archimedes method.

[0020] The resulting magnesium-lithium alloy at room temperature has a tensile strength of 220MPa, a yield strength of 210MPa, an elongation of 24%, and an impact toughness of 350KJ / m 2 , Density: 1.50g / cm 3 ; At 150°C, tensile strength: 180MPa, yield strength: 162MPa, elongation: 22%.

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Abstract

The invention provides a magnesium-lithium alloy strengthened by Ag, which is melt by pure magnesium, pure lithium, pure aluminum, pure zinc and pure silver. The weight percentage of the components of the alloy is 8 percent of Li, 2.5-3.5 percent of Al, 1.0-1.5 percent of Zn, 0.2-1.0 percent of Ag, and the rest of Mg. On the basis of maintaining high strength, the magnesium-lithium alloy can improve the plasticity, aging stability and high temperature resistance of the alloy. The novel magnesium-lithium alloy manufactured by the method of the invention has the mechanical performance of 190-260MPa of tensile strength, 160-250MPa of yield strength, 18-35 percent of extensibility, 290-470KJ / m<2> of anti-impact toughness and 1.25-1.52g / cm<3> of density at room temperature, and 130-200MPa of tensile strength, 120-180MPa of yield strength and 15-28 percent of extensibility below 150 DEG C.

Description

(1) Technical field [0001] The invention relates to an alloy, specifically a magnesium-lithium alloy reinforced by adding Ag. (2) Background technology [0002] Magnesium-lithium alloy is considered to be the lightest structural metal. It not only has extremely low density, high specific strength and specific stiffness, but also has good magnetic shielding and shockproof properties. Therefore, it is widely used in the communication electronics industry, military industry and aerospace industry. and other fields have broad prospects for development. [0003] However, due to the low strength of magnesium-lithium alloys, poor aging stability and corrosion resistance, the development of magnesium-lithium alloys is restricted. Generally, adding alloying elements is an effective way to improve the properties of magnesium-lithium alloys. In the patent disclosed by Zhang Milin and others (a high-strength magnesium-lithium alloy, publication number: CN101121981A), Al, Zn, and Ce ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00
Inventor 王君门枢李茹民张密林
Owner HARBIN ENG UNIV
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