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Mg-Li-Al alloy with combustion resistance and processing technology thereof

A magnesium-lithium alloy and alloy technology, applied in the field of alloys, can solve problems such as the inability to meet the requirements of combustion resistance, and achieve the effects of simple smelting and processing methods, low high-temperature strength, and low production costs

Inactive Publication Date: 2017-12-05
GUANGZHOU YUZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a structural material, it is far from enough to meet the requirements of only having combustion resistance during smelting. More importantly, the final magnesium-lithium alloy product must also have satisfactory mechanical strength, at least reaching the level commonly used. Mechanical properties of magnesium-lithium alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A Mg-Li-Al magnesium-lithium alloy with combustion resistance when smelting at 720 degrees. In terms of weight percentage, the chemical composition of the alloy is: Li: 11.5wt.%, Al: 1.3wt.%, Ca: 2.4wt.%, Mn: 0.2wt.%, Nb: 0.1wt.%, Pr: 0.1wt .%, B: 0.1wt.%, In: 0.7wt.%, the balance is magnesium. The preparation method of the alloy: add the above-mentioned raw materials into the induction furnace under the atmospheric environment, and use a silicon carbide crucible. Induction heating to 720 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 720 degrees for 10 minutes for casting. The ingots were deformed at room temperature with a rolling reduction of 11% per pass. Every 3 passes of rolling requires an intermediate heat treatment to eliminate work hardening, the process is: 240 degrees, 1.2 hours. The final heat treatment process after rolling is: vacuum soluti...

Embodiment 2

[0019]A Mg-Li-Al magnesium-lithium alloy with combustion resistance when smelting at 740 degrees. In terms of weight percentage, the chemical composition of the alloy is: Li: 11.8wt.%, Al: 2.6wt.%, Ca: 5.3wt.%, Mn: 0.4wt.%, Nb: 0.2wt.%, Pr: 0.2wt .%, B: 0.2wt.%, In: 0.6wt.%, the balance is magnesium. The preparation method of the alloy: add the above-mentioned raw materials into an induction furnace under atmospheric conditions, and use a silicon carbide crucible. Induction heating to 740 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 740 degrees for 10 minutes for casting. The ingot was subjected to deformation treatment at room temperature, and the rolling reduction in each pass was 12%. Every 3 passes of rolling requires an intermediate heat treatment to eliminate work hardening, the process is: 240 degrees, 1.2 hours. The final heat treatment process after r...

Embodiment 3

[0021] A Mg-Li-Al magnesium-lithium alloy with combustion resistance when smelted at 690 degrees. In terms of weight percentage, the chemical composition of the alloy is: Li: 10.6wt.%, Al: 2.6wt.%, Ca: 3.8wt.%, Mn: 0.3wt.%, Nb: 0.2wt.%, Pr: 0.2wt .%, B: 0.2wt.%, In: 0.7wt.%, the balance is magnesium. The preparation method of the alloy: add the above-mentioned raw materials into the induction furnace under the atmospheric environment, and use a silicon carbide crucible. Induction heating to 690 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 690 degrees for 10 minutes for casting. The ingots were deformed at room temperature with a rolling reduction of 10% in each pass. Every 3 passes of rolling requires an intermediate heat treatment to eliminate work hardening, the process is: 240 degrees, 1.2 hours. The final heat treatment process after rolling is: vacuum sol...

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Abstract

The invention discloses a Mg-Li-Al alloy with combustion resistance when smelted between 680-780 degrees and a processing technology thereof. In terms of weight percentage, the composition of the alloy is: Li: 10.0‑12.0wt.%, Al: 1.0‑4.0wt.%, Ca: 2.0‑6.0wt.%, Mn: 0.1‑0.6wt.%, Nb: 0.1‑ 0.2wt.%, Pr: 0.1‑0.2wt.%, B: 0.1‑0.2wt.%, In: 0.6‑0.8wt.%, and the balance is magnesium. The present invention provides a novel material science solution for the current situation that Mg-Li-Al magnesium-lithium alloys need to be protected and smelted during smelting at high temperatures. By optimizing the main and secondary additive elements in the alloy, the type, composition and content of the oxide film and nitride film formed on the surface of the melt can be changed, so as to effectively prevent the burning of the magnesium-lithium alloy in the atmospheric state. The obtained Mg-Li-Al magnesium-lithium alloy material has the mechanical properties of traditional magnesium-lithium alloys at room temperature, and has high-temperature mechanical properties that traditional Mg-Li-Al magnesium-lithium alloys do not have: at 150 degrees, the yield strength is 100-120MPa , while traditional materials have a yield strength of about 65MPa at 150 degrees.

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 material is a new type of alloy material formed by adding metal lithium to magnesium, which has excellent mechanical properties of low density, high specific stiffness and high specific strength. The density is generally 1.35-1.65 g / cm 3 , about 1 / 5 of steel and 1 / 2 of aluminum alloy, it is a veritable ultra-light alloy. When the lithium content is relatively high, the density of magnesium-lithium alloys is even lower than 1.0 g / cm 3 , known as a metal that can float on water. As the lithium content changes, the microstructure of the magnesium-lithium alloy will also change significantly. When the lithium content is lower than 5.7wt.%, the alloy is an α(Mg) single-phase structure, and its crystal structure is hexagonal close-packed (hcp); when the lithium content is higher than 10.3wt.%, the alloy...

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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