Single-phase alpha-magnesium-lithium alloy with extremely high thermal conductivity and processing technology for alloy

A magnesium-lithium alloy and thermal conductivity technology, applied in the field of alloys, can solve problems such as constraints and insufficient heat transfer performance, and achieve the effects of large calorific value, improved heat transfer coefficient, and easy industrialization of large-scale equipment.

Inactive Publication Date: 2017-12-22
GUANGZHOU YUZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heat transfer performance of the existing magnesium-lithium alloy is not enough, and the heat transfer coefficient is maintained at 80W / m at room temperature. around K
Seriously restricts the further application of this type of alloy in aerospace, electronics and military industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A very high thermal conductivity single-phase alpha-magnesium-lithium alloy. In terms of weight percentage, the chemical composition of the alloy is: Li: 5.2wt.%, Al: 1.1wt.%, Zn: 1.5wt.%, Cr: 0.2wt.%, Hf: 0.1wt.%, Ce: 0.1wt .%, Gd: 0.1wt.%, Sn: 0.5wt.%. 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 melt, and use the electromagnetic stirring effect to fully stir for about 10 minutes. The alloy melt is kept at 750°C for 10 minutes and then cast into a water glass or graphite mold for casting. The ingot was subjected to deformation treatment at room temperature, and the rolling reduction in each pass was 20%. Every 3 passes of rolling requires an intermediate heat treatment to eliminate work hardening. The process is: 300 degrees for 1 hour. The final heat treatment process after rolling is: vacuum solutio...

Embodiment 2

[0018] A very high thermal conductivity single-phase alpha-magnesium-lithium alloy. In terms of weight percentage, the chemical composition of the alloy is: Li: 4.8wt.%, Al: 1.9wt.%, Zn: 2.1wt.%, Cr: 0.3wt.%, Hf: 0.1wt.%, Ce: 0.1wt .%, Gd: 0.2wt.%, Sn: 0.7wt.%. 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 melt, and use the electromagnetic stirring effect to fully stir for about 10 minutes. The alloy melt is kept at 750°C for 10 minutes and then cast into a water glass or graphite mold for casting. The ingot was subjected to deformation treatment at room temperature, and the rolling reduction in each pass was 20%. Every 3 passes of rolling requires an intermediate heat treatment to eliminate work hardening. The process is: 300 degrees for 1 hour. The final heat treatment process after rolling is: vacuum solutio...

Embodiment 3

[0020] A very high thermal conductivity single-phase alpha-magnesium-lithium alloy. In terms of weight percentage, the chemical composition of the alloy is: Li: 4.9wt.%, Al: 1.6wt.%, Zn: 1.8wt.%, Cr: 0.3wt.%, Hf: 0.2wt.%, Ce: 0.1wt .%, Gd: 0.1wt.%, Sn: 0.8wt.%. 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 melt, and use the electromagnetic stirring effect to fully stir for about 10 minutes. The alloy melt is kept at 750°C for 10 minutes and then cast into a water glass or graphite mold for casting. The ingot was subjected to deformation treatment at room temperature, and the rolling reduction in each pass was 20%. Every 3 passes of rolling requires an intermediate heat treatment to eliminate work hardening. The process is: 300 degrees for 1 hour. The final heat treatment process after rolling is: vacuum solutio...

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Abstract

The invention discloses a single-phase α-magnesium-lithium alloy with extremely high thermal conductivity and a processing technology thereof. According to weight percentage, the composition of the alloy is: Li:2.0‑5.5wt.%, Al:1.0‑2.0wt.%, Zn:1.0‑3.0wt.%, Cr:0.2‑0.4wt.%, Hf:0.1‑ 0.2wt.%, Ce: 0.1‑0.2wt.%, Gd: 0.1‑0.3wt.%, Sn: 0.5‑1.0wt.%, and the balance is magnesium. The invention provides a very high thermal conductivity single-phase α-magnesium-lithium alloy. The material has the mechanical properties and damping properties of traditional magnesium-lithium alloys: the elastic modulus is 50-70GPa, the yield strength is 90-120MPa, the tensile strength is 140-160MPa, and the elongation is 6-18%. And it has high thermal conductivity that traditional magnesium-lithium alloys do not have: the thermal conductivity is 110-120W / m.K, and the traditional magnesium-lithium alloy is about 80W / m.K. While ensuring the mechanical properties of common magnesium-lithium alloys, the heat transfer coefficient of the alloy can be increased by about 50%. This enables the alloy to have further specific applications in the occasions where the heat generation is large and the weight of the device is required, and it is convenient for large-scale industrial application.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a magnesium-lithium alloy. Background technique [0002] Magnesium-lithium alloy is a new type of alloy formed by adding lithium and other small amounts of alloying elements to magnesium metal. Theoretically, the densities of magnesium and lithium are 1.73 and 0.53 g / cm 3 . Depending on the composition of the alloy, the density of the magnesium-lithium alloy can be designed at 0.97-1.3g / cm 3 range changes. The lightest one can float on the water and become an alloy that floats on the water. Magnesium-lithium alloy is a breakthrough point in the development of magnesium alloys. It is at the forefront of magnesium alloy research and industrialization. It is known as the most green and environmentally friendly revolutionary metal material in the future. According to the different lithium content and structure, magnesium-lithium alloys can be divided into three categories: alloys...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C1/02C22F1/06
CPCC22C23/00C22C1/02C22F1/06
Inventor 杨长江
Owner GUANGZHOU YUZHI TECH CO LTD
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