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Method for refining LA141 magnesium-lithium alloy grains

A magnesium-lithium alloy and crystal grain technology is applied in the field of adding Al-5Ti-1B master alloy to refine magnesium-lithium alloy crystal grains, which can solve the problems of high cost and low value for industrialization and promotion.

Inactive Publication Date: 2010-05-26
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rapid solidification - powder metallurgy can significantly refine grains, improve plasticity and strength, but the cost is too high, and the value of industrialization is not high

Method used

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  • Method for refining LA141 magnesium-lithium alloy grains
  • Method for refining LA141 magnesium-lithium alloy grains
  • Method for refining LA141 magnesium-lithium alloy grains

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Adopt the following formula (mass percentage): Mg: 83.95%; Li: 14.0%; Al: 1.25%; Al-5Ti-1B: 0.50%; wherein Mn, Fe, Si, Ni, Cu, Na are less than 0.30%, and the melting It is carried out in a vacuum induction melting furnace, and the above-mentioned various components are put into a stainless steel crucible. Before smelting, evacuate the furnace to a vacuum state, then introduce argon, and then start smelting. After the alloy is completely melted, keep it at 700°C for 15 minutes. After the alloy is completely solidified, take out the crucible to obtain the cast alloy. The whole melting process is under the protection of argon.

[0026] The grain size of the obtained magnesium-lithium alloy was measured by the intercept method, and the average grain size was 800 μm.

Embodiment 2

[0028] The following formula (mass percentage) Mg: 83.45%; Li: 14.0%; Al: 1.25%; Al-5Ti-1B: 1.0%; Mn, Fe, Si, Ni, Cu, Na less than 0.30%, smelting in vacuum Carried out in an induction melting furnace, the various components are placed in stainless steel crucibles. Before smelting, evacuate the furnace to a vacuum state, then introduce argon, and then start smelting. After the alloy is completely melted, keep it at 700°C for 15 minutes. After the alloy is completely solidified, take out the crucible to obtain the cast alloy. The whole melting process is under the protection of argon.

[0029] The grain size of the obtained magnesium-lithium alloy was measured by the intercept method, and the average grain size was 750 μm.

Embodiment 3

[0031] Adopt the following formula (mass percentage): Mg: 83.20%; Li: 14.0%; Al: 1.25%; Al-5Ti-1B: 1.25%; Mn, Fe, Si, Ni, Cu, Na are less than 0.30%, melting in vacuum It is carried out in an induction melting furnace, and the above-mentioned various components are put into a stainless steel crucible. Before smelting, evacuate the furnace to a vacuum state, then introduce argon, and then start smelting. After the alloy is completely melted, keep it at 700°C for 15 minutes. After the alloy is completely solidified, take out the crucible to obtain the cast alloy. The whole melting process is under the protection of argon.

[0032] The grain size of the obtained magnesium-lithium alloy was measured by the intercept method, and the average grain size was 550 μm.

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Abstract

The invention relates to a method for refining LA141 magnesium-lithium alloy grains. In the process of smelting, Al-5Ti-1B master alloy is added to refine the LA141 magnesium-lithium alloy grains. A cast structure of the obtained LA141 magnesium-lithium alloy is fine, and simultaneously has excellent intensity and plasticity and excellent subsequent machining performance.

Description

technical field [0001] The invention relates to a method for refining grains, in particular to a method for adding Al-5Ti-1B master alloy to refine magnesium-lithium alloy grains. Background technique [0002] With the enhancement of energy consumption reduction and environmental protection requirements of transportation vehicles, as well as the development of electronic industry and aerospace technology, it is urgent to develop low-density, high-strength metal structural materials. Mg-Li alloy is currently the lightest metal structural material and one of the most potential alloy systems for the development of ultra-light and high-strength alloys. It has become the focus of research at home and abroad in recent years. Mg-Li alloy not only has high specific strength, high impact toughness, good machinability, but also has good magnetic shielding, shock absorption performance and high-energy particle penetration resistance, so it has received extensive attention in aerospace,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C23/00
Inventor 蒋斌潘复生高亮殷恒梅丁培道
Owner CHONGQING UNIV
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