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High-damping lithium-magnesium alloy containing dual phases alpha and beta and processing technology thereof

A magnesium-lithium alloy and high damping technology, applied in the field of alloys, can solve problems such as restricting magnesium-lithium alloys, and achieve the effects of low production cost, simple processing method and improved service life

Inactive Publication Date: 2017-11-17
GUANGZHOU YUZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This situation seriously restricts the wide application of magnesium-lithium alloys in the field of lightweight and relatively large vibration.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A magnesium-lithium alloy with high damping containing duplex α+β. In terms of weight percentage, the chemical composition of the alloy is: Li: 6.9wt.%, Bi: 1.4wt.%, In: 0.9wt.%, Y: 0.2wt.%, W: 0.2wt.%, Se: 0.1wt .%, V:0.1wt.%, the balance is magnesium. The preparation method of the alloy: add the above-mentioned raw materials into an induction furnace protected by argon gas, and use a silicon carbide crucible. Induction heating to 750 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is poured into a water glass mold at 750°C for 10 minutes for casting. Remove the casting after it has completely solidified. The ingot was subjected to deformation treatment at room temperature, and the rolling reduction in each pass was 25%. Every 3 passes of rolling requires an intermediate heat treatment to eliminate work hardening. The process is: heat preservation at 240 degrees for 0.8 hours. The final he...

Embodiment 2

[0017] A magnesium-lithium alloy with high damping containing duplex α+β. In terms of weight percentage, the chemical composition of the alloy is: Li: 8.6wt.%, Bi: 3.2wt.%, In: 1.2wt.%, Y: 0.2wt.%, W: 0.2wt.%, Se: 0.2wt .%, V:0.1wt.%, the balance is magnesium. The preparation method of the alloy: add the above-mentioned raw materials into an induction furnace protected by argon gas, and use a silicon carbide crucible. Induction heating to 750 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is poured into a water glass mold at 750°C for 10 minutes for casting. Remove the casting after it has completely solidified. The ingot was subjected to deformation treatment at room temperature, and the rolling reduction in each pass was 25%. Every 3 passes of rolling requires an intermediate heat treatment to eliminate work hardening. The process is: heat preservation at 240 degrees for 0.8 hours. The final he...

Embodiment 3

[0019] A magnesium-lithium alloy with high damping containing duplex α+β. In terms of weight percentage, the chemical composition of the alloy is: Li: 7.4wt.%, Bi: 2.7wt.%, In: 0.8wt.%, Y: 0.1wt.%, W: 0.2wt.%, Se: 0.1wt .%, V:0.2wt.%, the balance is magnesium. The preparation method of the alloy: add the above-mentioned raw materials into an induction furnace protected by argon gas, and use a silicon carbide crucible. Induction heating to 750 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is poured into a water glass mold at 750°C for 10 minutes for casting. Remove the casting after it has completely solidified. The ingot was subjected to deformation treatment at room temperature, and the rolling reduction in each pass was 25%. Every 3 passes of rolling requires an intermediate heat treatment to eliminate work hardening. The process is: heat preservation at 240 degrees for 0.8 hours. The final he...

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Abstract

The invention discloses a high-damping lithium-magnesium alloy containing dual phases alpha and beta and a processing technology thereof. The high-damping lithium-magnesium alloy is prepared from, by weight, 6.0-10.0% of Li, 1.0-4.0% of Bi, 0.6-3.2% of In, 0.1-0.3% of Y, 0.1-0.4% of W, 0.1-0.2% of Se, 0.1-0.2% of V and the balance magnesium. The high-damping lithium-magnesium alloy contains the dual phases. The material has the mechanical properties of traditional lithium-magnesium alloy: the elastic modulus is 50.70 GPa, the yield strength is 90-120MPa, the tensile strength is 140-160 MPa, and the elongation percentage is 6-18%. The high-damping lithium-magnesium alloy has the high damping performance which the traditional lithium-magnesium alloy does not have, SDC = 40-45%, while the SDC of the traditional material is about 30%. The alloy is subjected to induction smelting under the protection of argon, a smelting processing method is simple, and the production cost is lower. While the damping performance is ensured, the service life of the alloy is further prolonged, and large-scale industrialized application is facilitated. The high-damping lithium-magnesium alloy can be used for manufacturing structural parts with the use temperature of 100 DEG C or below and have a very remarkable damping effect.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a magnesium-lithium alloy. Background technique [0002] Adding lithium element as the main alloying element to magnesium alloy can prepare the world's lightest high-end metal structure material magnesium-lithium alloy. The density of magnesium-lithium alloy is generally 1.35-1.65g / cm 3 . Magnesium-lithium alloy has good thermal conductivity, electrical conductivity, ductility, high specific strength, specific stiffness and resistance to high-energy particle penetration. It is the most ideal structural material in the fields of aerospace, aviation and weapon industry, nuclear industry, and electronic products. Magnesium-lithium alloys are much lighter than magnesium alloys widely used in the past, and the plate thickness required to achieve the same strength is also thinner, which can reduce the weight by about 25%. Compared with aluminum alloy, the weight can be reduced by mor...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C1/02C22F1/02C22F1/06
CPCC22C1/02C22C23/00C22F1/02C22F1/06
Inventor 杨长江
Owner GUANGZHOU YUZHI TECH CO LTD
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