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Magnesium-lithium alloy having extremely high heat conductivity and dual phases of alpha and beta and machining process thereof

A magnesium-lithium alloy, extremely high technology, applied in the field of alloys, can solve maintenance and other problems, achieve the effects of improved heat transfer coefficient, low production cost, great economic and social benefits

Inactive Publication Date: 2017-12-29
GUANGZHOU YUZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And at the same time maintain the mechanical properties of the existing magnesium-lithium alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A magnesium-lithium alloy material with extremely high thermal conductivity and containing dual-phase α+β. By weight percentage, the chemical composition of the alloy is: Li: 9.0wt.%, Si: 6.4wt.%, In: 1.2wt.%, Sn: 0.3wt.%, Ti: 0.9wt.%, Mo: 0.2wt% .%, Cd: 2.4wt.%, Al: 1.3wt.%, Co: 1.2wt.%, Mn: 3.1wt.%, and the balance is magnesium. The preparation method of the alloy: the above-mentioned raw materials are added into an induction furnace protected by argon gas, and a silicon carbide crucible is used. Induction heating to 770 degrees to form an alloy melt, and fully stirring for about 10 minutes using the electromagnetic stirring effect. The alloy melt is kept at 770 degrees for 10 minutes and then cast into a water glass or graphite mold for casting. The ingot is deformed at room temperature, and the rolling reduction per pass is 20%. Every 3 passes of rolling requires an intermediate heat treatment to eliminate work hardening. The process is: 320 degrees for 1 hour. ...

Embodiment 2

[0019] A magnesium-lithium alloy material with extremely high thermal conductivity and containing dual-phase α+β. By weight percentage, the chemical composition of the alloy is: Li: 8.2wt.%, Si: 9.3wt.%, In: 1.7wt.%, Sn: 0.4wt.%, Ti: 0.8wt.%, Mo: 0.3wt% .%, Cd: 2.8wt.%, Al: 1.4wt.%, Co: 1.2wt.%, Mn: 4.2wt.%, and the balance is magnesium. The preparation method of the alloy: the above-mentioned raw materials are added into an induction furnace protected by argon gas, and a silicon carbide crucible is used. Induction heating to 770 degrees to form an alloy melt, and fully stirring for about 10 minutes using the electromagnetic stirring effect. The alloy melt is kept at 770 degrees for 10 minutes and then cast into a water glass or graphite mold for casting. The ingot is deformed at room temperature, and the rolling reduction per pass is 20%. Every 3 passes of rolling requires an intermediate heat treatment to eliminate work hardening. The process is: 320 degrees for 1 hour. ...

Embodiment 3

[0021] A magnesium-lithium alloy material with extremely high thermal conductivity and containing dual-phase α+β. By weight percentage, the chemical composition of the alloy is: Li: 8.8wt.%, Si: 7.3wt.%, In: 1.6wt.%, Sn: 0.9wt.%, Ti: 1.1wt.%, Mo: 0.3wt% .%, Cd: 2.9wt.%, Al: 1.3wt.%, Co: 2.8wt.%, Mn: 4.2wt.%, and the balance is magnesium. The preparation method of the alloy: the above-mentioned raw materials are added into an induction furnace protected by argon gas, and a silicon carbide crucible is used. Induction heating to 770 degrees to form an alloy melt, and fully stirring for about 10 minutes using the electromagnetic stirring effect. The alloy melt is kept at 770 degrees for 10 minutes and then cast into a water glass or graphite mold for casting. The ingot is deformed at room temperature, and the rolling reduction per pass is 20%. Every 3 passes of rolling requires an intermediate heat treatment to eliminate work hardening. The process is: 320 degrees for 1 hour. ...

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Abstract

The invention discloses a magnesium-lithium alloy material with extremely high thermal conductivity and containing two-phase α+β and a processing technology thereof. In terms of weight percentage, the composition of the alloy is: Li: 8.0‑10.0wt.%, Si: 5.0‑14.0wt.%, In: 1.0‑3.0wt.%, Sn: 0.2‑1.2wt.%, Ti: 0.8‑ 1.2wt.%, Mo: 0.2‑0.4wt.%, Cd: 2.0‑4.0wt.%, Al: 1.2‑1.4wt.%, Co: 1.0‑5.0wt.%, Mn: 3.0‑5.0wt.%, The balance is magnesium. The material has the mechanical 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 120-130W / m. K, the traditional magnesium-lithium alloy is 80W / m. K or so. 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] By adding metallic lithium to metallic magnesium, a magnesium-lithium alloy with low density and high specific strength is obtained. This new material represents the technological frontier of magnesium alloy development and is known as the most green and environmentally friendly revolutionary material. It has high damping properties for shock absorption and noise reduction, as well as anti-radiation and anti-electromagnetic interference properties. According to different lithium content and structure, magnesium-lithium alloys can be divided into three categories: alloys with lithium content less than 5.5wt.%, whose structure is a solid solution (α phase) of lithium dissolved in hcp magnesium; lithium content greater than 10.2wt% .% alloy, its microstructure is a uniform bcc solid solution (β phase); alloys with lithium cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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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