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Aluminum lithium alloy with extremely excellent pressure-casting performance

An aluminum-lithium alloy, excellent technology, applied in the field of alloys, can solve the problems of low liquid-solid solidification temperature range, poor recyclability of waste materials and slag materials, low dynamic viscosity of aluminum-lithium alloy, etc., and achieves low liquid-solid solidification temperature. The effect of the range, the metal liquid suction is small, and the filling performance is very good

Inactive Publication Date: 2018-04-06
GUANGZHOU YUZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(5) The dynamic viscosity of aluminum-lithium alloy is low
The aluminum-lithium alloy has a low liquid-solid phase solidification temperature range, which can solve the problems of large thermal cracking tendency during casting, obvious casting voids and looseness, extensive melt treatment process, poor quality, large thermal cracking tendency, poor casting performance, and low product yield. Technical problems such as low and high temperature strength, poor reusability of waste materials and slag materials, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] An aluminum-lithium alloy with 710-degree melting and extremely excellent die-casting properties. In terms of weight percentage, the chemical composition of the alloy is: Li: 6.2wt.%, Sr: 1.3wt.%, Si: 2.6wt.%, Mg: 1.4wt.%, Ge: 0.8wt.%,Th: 0.2wt .%, Nd: 0.3wt.%, B: 0.9wt.%, the balance is aluminum. The preparation method of the alloy: add the above-mentioned raw materials into the induction furnace under the atmospheric environment, and use a silicon carbide crucible. Induction heating to 710 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 710 degrees for 10 minutes and cast into the equipment at the same level as the hot top for semi-continuous casting, and the ingot moving speed is 8m / min. The ingot can be used as a casting raw material for die casting in a subsequent process to prepare complex-shaped aluminum-lithium alloy castings. The final heat treatment process of these castin...

Embodiment 2

[0020] An aluminum-lithium alloy with 740-degree melting and extremely excellent die-casting performance. By weight percentage, the chemical composition is: Li: 7.5wt.%, Sr: 1.4wt.%, Si: 2.6wt.%, Mg: 1.2wt.%, Ge: 0.8wt.%, Th: 0.1wt.% , Nd: 0.3wt.%, B: 0.4wt.%, the balance is aluminum. The preparation method of the alloy: add the above-mentioned raw materials into the induction furnace under the atmospheric environment, and use a silicon carbide crucible. Induction heating to 740 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 740 degrees for 10 minutes and cast into the equipment at the same level as the hot top for semi-continuous casting, and the ingot moving speed is 9m / min. The ingot can be used as a casting raw material for die casting in a subsequent process to prepare complex-shaped aluminum-lithium alloy castings. The final heat treatment process of these castings is: vacuum soluti...

Embodiment 3

[0022]An aluminum-lithium alloy with 790-degree melting and extremely excellent die-casting performance. In terms of weight percentage, the chemical composition of the alloy is: Li: 5.9wt.%, Sr: 1.2wt.%, Si: 2.4wt.%, Mg: 1.5wt.%, Ge: 0.9wt.%, Th: 0.2wt .%, Nd: 0.4wt.%, B: 0.9wt.%, the balance is aluminum. The preparation method of the alloy: add the above-mentioned raw materials into the induction furnace under the atmospheric environment, and use a silicon carbide crucible. Induction heating to 790 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 790 degrees for 10 minutes and cast into the equipment at the same level as the hot top for semi-continuous casting, and the ingot moving speed is 8m / min. The ingot can be used as a casting raw material for die casting in a subsequent process to prepare complex-shaped aluminum-lithium alloy castings. The final heat treatment process of these casti...

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Abstract

The invention discloses an aluminum-lithium alloy with extremely excellent die-casting performance when smelted between 700-800 degrees and a processing technology thereof. In terms of weight percentage, the chemical composition of the alloy is: Li: 4.0‑8.0wt.%, Sr: 1.0‑1.5wt.%, Si: 2.0‑3.0wt.%, Mg: 1.0‑1.5wt.%, Ge: 0.5 ‑1.2wt.%, Th: 0.1‑0.3wt.%, Nd: 0.2‑0.5wt.%, B: 0.5‑1.2wt.%, and the balance is aluminum. The aluminum-lithium alloy material has good casting properties and is suitable for pressure casting of thin-walled parts under a protective atmosphere. It is especially suitable for casting lightweight structural materials that require lightweight features, and has a huge market prospect.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to an aluminum-lithium alloy. Background technique [0002] Adding lithium as an alloying element to aluminum forms an aluminum-lithium alloy. Lithium can both reduce the density of aluminum and increase the modulus of elasticity. Generally, for every 1wt.% lithium added to an aluminum alloy, the density decreases by about 3%, while its modulus of elasticity increases by about 6%. Aluminum-lithium alloys are mainly developed for the weight reduction of aircraft and aerospace equipment, so they are mainly used in the aerospace field, as well as ordnance and nuclear reactor materials, tank armor-piercing bombs, torpedoes and other weapon structural parts. Aluminum-lithium alloys have been used in military aircraft, civil airliners and helicopters, mainly for fuselage frames, hatches, fuel tanks, etc. Using aluminum-lithium alloy to manufacture aircraft can reduce its weight by 14.6w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/02C22F1/02C22F1/04
CPCC22C21/00C22C1/026C22F1/02C22F1/04
Inventor 杨长江
Owner GUANGZHOU YUZHI TECH CO LTD
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