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A single-phase beta magnesium-lithium alloy having excellent castability and heat transfer performance

A technology of casting performance and heat transfer performance, applied in the field of alloys, can solve the problems of magnesium-lithium alloy research, development and application limitations, castings are prone to flux inclusions, complex equipment, etc., and achieve excellent alloy yield and low liquid-solid phase Effect of solidification temperature range, good castability and heat transfer properties

Inactive Publication Date: 2018-04-10
GUANGZHOU YUZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the disadvantages of high cost to varying degrees, flux inclusions in castings, and complicated equipment.
Therefore, the research, development and application of magnesium-lithium alloys are limited.
Therefore, in the industrial and national defense fields that urgently need large-scale use of magnesium-lithium alloys, there has always been a current situation that needs to be overcome, such as low output, cumbersome processes, and high costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A single-phase β-magnesium-lithium alloy smelted at 740 degrees with excellent casting properties and heat transfer properties. In terms of weight percentage, the chemical composition of the alloy is: Li: 14.6wt.%, Cu: 1.8wt.%, Bi: 0.5wt.%, Sb: 0.3wt.%, V: 0.1wt.%, W: 0.1wt .%, Ag: 0.9wt.%, Ge: 0.4wt.%, Co: 0.1wt.%, and the balance is magnesium. The preparation method of the alloy: add the above-mentioned raw materials into an induction furnace protected by the atmosphere, and use a silicon carbide crucible. Induction heating to 740 degrees to form an alloy melt, and use the electromagnetic stirring effect to fully stir for about 10 minutes. The alloy melt was kept at 740°C for 10 minutes and then poured into the equipment at the same level as the hot top for semi-continuous casting. The ingot moving speed was 12m / min. The ingot can be used as a casting raw material for pressure casting in subsequent processes to prepare complex-shaped magnesium alloy castings; the fi...

Embodiment 2

[0021]A single-phase β-magnesium-lithium alloy smelted at 760 degrees with excellent casting properties and heat transfer properties. In terms of weight percentage, the chemical composition of the alloy is: Li: 15.3wt.%, Cu: 2.1wt.%, Bi: 0.5wt.%, Sb: 0.4wt.%, V: 0.1wt.%, W: 0.1wt .%, Ag: 0.9wt.%, Ge: 0.5wt.%, Co: 0.1wt.%, and the balance is magnesium. The preparation method of the alloy: add the above-mentioned raw materials into an induction furnace protected by the atmosphere, and use a silicon carbide crucible. Induction heating to 760 degrees to form an alloy melt, and use the electromagnetic stirring effect to fully stir for about 10 minutes. The alloy melt was kept at 760°C for 10 minutes and then poured into the equipment at the same level as the hot top for semi-continuous casting. The ingot moving speed was 12m / min. The ingot can be used as a casting raw material for pressure casting in subsequent processes to prepare complex-shaped magnesium alloy castings; the fin...

Embodiment 3

[0023] A single-phase β-magnesium-lithium alloy smelted at 780 degrees with excellent casting properties and heat transfer properties. In terms of weight percentage, the chemical composition of the alloy is: Li: 15.3wt.%, Cu: 1.6wt.%, Bi: 0.5wt.%, Sb: 0.4wt.%, V: 0.1wt.%, W: 0.1wt .%, Ag: 0.9wt.%, Ge: 0.5wt.%, Co: 0.1wt.%, and the balance is magnesium. The preparation method of the alloy: add the above-mentioned raw materials into an induction furnace protected by the atmosphere, and use a silicon carbide crucible. Induction heating to 780 degrees to form an alloy melt, and use the electromagnetic stirring effect to fully stir for about 10 minutes. The alloy melt was kept at 780°C for 10 minutes and then poured into the equipment at the same level as the hot top for semi-continuous casting. The ingot moving speed was 12m / min. The ingot can be used as a casting raw material for pressure casting in subsequent processes to prepare complex-shaped magnesium alloy castings; the fi...

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Abstract

The invention discloses a single-phase β-magnesium-lithium alloy with excellent casting performance and heat transfer performance and a processing technology thereof. According to weight percentage, the composition of the alloy is: Li: 13.0‑18.0wt.%, Cu: 1.2‑2.3wt.%, Bi: 0.4‑0.6wt.%, Sb: 0.2‑0.5wt.%, V: 0.1‑ 0.2wt.%, W: 0.1‑0.2wt.%, Ag: 0.8‑1.2wt.%, Ge: 0.3‑0.6wt.%, Co: 0.1‑0.2wt.%, and the balance is magnesium. The magnesium-lithium alloy for die-casting has high thermal conductivity that traditional magnesium-lithium alloys do not have. 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 different lithium content and structure, magnesium-lithium alloys can be divided into three categories: alloys con...

Claims

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Application Information

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