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Preparation method of aluminium-lithium intermediate alloys

A master alloy, aluminum-lithium technology, applied in the field of preparation of aluminum-lithium alloy, can solve problems such as difficult preparation of aluminum-lithium master alloy, complicated operation process, etc.

Active Publication Date: 2010-02-17
SOUTHWEST ALUMINUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can prepare an aluminum-lithium master alloy with a lithium content below 15%, the method is complicated in operation, so it is not easy to prepare an aluminum-lithium master alloy with stable quality.

Method used

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  • Preparation method of aluminium-lithium intermediate alloys
  • Preparation method of aluminium-lithium intermediate alloys
  • Preparation method of aluminium-lithium intermediate alloys

Examples

Experimental program
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Embodiment 1

[0044] a) taking lithium oxide as a raw material, and preparing lithium metal liquid by molten salt electrolysis;

[0045] b) melting pure aluminum ingots to prepare molten aluminum;

[0046] c) transporting the molten lithium metal to the melting furnace through the first feeding port 11d, and simultaneously transporting the molten aluminum metal to the melting furnace through the second feeding port 11e, the molten lithium metal and the molten aluminum passing through the first launder 11b respectively and the second launder 11e flow down to the lower part of the smelting furnace, and are well mixed to form a mixed metal liquid in the process of flowing. The weight ratio of aluminum and lithium in the mixed metal liquid is aluminum: lithium is 85:15, and the smelting furnace is fed into Argon as a shielding gas;

[0047] d) The temperature in the smelting furnace is set to 750°C. After the mixed metal liquid falls into the crystallizer, the cooler of the crystallizer is tur...

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Abstract

The invention discloses a preparation method of aluminium-lithium intermediate alloys, which comprises the following steps: preparing a lithium metal liquid; sending the lithium metal liquid and an aluminium metal liquid into a smelting furnace of a semicontinuous casting machine for mixing; and sending the mixed metal liquid into a crystallizer of the semicontinuous casting machine for casting ingots, wherein the magnetic density in the crystallizer is 0.01-0.05T and the casting temperature is 700-900 DEG C when casting the ingots. The lithium metal liquid and the aluminium metal liquid are together sent into the smelting furnace of the semicontinuous casting machine for mixing, and then an aluminium-lithium intermediate alloy is pulled out from the crystallizer of the semicontinuous casting machine. Under the action of a magnetic field of the crystallizer, low-frequency shock and stable circumfluence of the mixed liquid occur in, a better mixing function can be performed to the lithium metal liquid and the aluminium metal liquid, the nucleation rate is effectively improved, and the aluminium-lithium intermediate alloy with stable quality can be prepared.

Description

technical field [0001] The invention relates to an alloy preparation method, in particular to an aluminum-lithium alloy preparation method. Background technique [0002] Lithium is the lightest metal element in nature, with a density of only 0.534g / cm 3 , adding metal lithium as an alloying element to metal aluminum forms an aluminum-lithium alloy. Compared with conventional aluminum alloys, aluminum alloys can increase the rigidity while reducing the specific gravity of the alloy, while maintaining high strength, good corrosion resistance, fatigue resistance and suitable ductility. [0003] If aluminum-lithium alloys are used instead of traditional aluminum alloys to manufacture Boeing aircraft, the weight of the aircraft can be reduced by 14.6%, and the manufacturing cost can be reduced by 2.1%. Fuel can be saved by 5.4% per aircraft, and the annual cost of flying will be reduced by 2.2%. Therefore, aluminum-lithium alloys are considered to be the most ideal structural ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/16B22D11/14C22B5/02C22B26/12C25C3/02C22C1/02
Inventor 张林和田岳宏
Owner SOUTHWEST ALUMINUM GRP
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