Mg-Li-Zr alloy with flame retardancy and processing technology of alloy

A technology of alloy and magnesium-lithium alloy, which is 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: 2018-01-16
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

[0018] A Mg-Li-Zr magnesium-lithium alloy with combustion resistance when smelting at 720 degrees. In terms of weight percentage, the chemical composition of the alloy is: Li: 6.7wt.%, Zr: 3.4wt.%, Sr: 4.9wt.%, Ho: 0.2wt.%, Er: 0.3wt.%, Th: 0.2wt .%, S: 1.4wt.%, B: 0.3wt.%, 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 ingot was deformed at room temperature, and the rolling reduction in each pass was 16%. Every 3 passes of rolling requires an intermediate heat treatment to eliminate work hardening, the process is: 210 degrees, 1.9 hours. The final heat treatment process after rolling is: vacuum sol...

Embodiment 2

[0020]A Mg-Li-Zr magnesium-lithium alloy with combustion resistance when smelting at 740 degrees. In terms of weight percentage, the chemical composition of the alloy is: Li: 11.2wt.%, Zr: 3.4wt.%, Sr: 4.6wt.%, Ho: 0.2wt.%, Er: 0.3wt.%, Th: 0.1wt .%, S: 1.2wt.%, B: 0.4wt.%, 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 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 18%. Every 3 passes of rolling requires an intermediate heat treatment to eliminate work hardening, the process is: 210 degrees, 1.9 hours. The final heat treatment process af...

Embodiment 3

[0022] A Mg-Li-Zr magnesium-lithium alloy with combustion resistance when smelted at 690 degrees. In terms of weight percentage, the chemical composition of the alloy is: Li: 10.4wt.%, Zr: 3.9wt.%, Sr: 5.2wt.%, Ho: 0.2wt.%, Er: 0.3wt.%, Th: 0.1wt .%, S: 1.3wt.%, B: 0.6wt.%, 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 ingot was deformed at room temperature, and the rolling reduction in each pass was 16%. Every 3 passes of rolling requires an intermediate heat treatment to eliminate work hardening, the process is: 210 degrees, 1.9 hours. The final heat treatment process after rolling is: vacuum sol...

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Abstract

The invention discloses an Mg-Li-Zr alloy with flame retardancy during melting and a processing technology of the alloy. The alloy is prepared from, in percentage by weight, 6.0wt.%-12.0wt.% of Li, 3.0wt.%-6.0wt.% of Zr, 4.0wt.%-8.0wt.% of Sr, 0.2wt.%-0.3wt.% of Ho, 0.2wt.%-0.4wt.% of Er, 0.1wt.%-0.2wt.% of Th, 1.2wt.%-1.8wt.% of S, 0.2wt.%-0.8wt.% of B and the balance of Mg. A novel materialogy solution scheme is provided to relieve the situation where protective melting is required during melting of Mg-Li alloys at the high temperature at preset. The type, ingredients and content of oxidation films and nitride films produced on the surface of a melt are changed by optimizing primary and secondary adding elements in the alloy, so that the burning phenomenon during melting of the Mg-Li alloy in the atmosphere state is effectively prevented. The Mg-Li alloy material has the mechanical performance of conventional Mg-Li alloys at the room temperature and high-temperature mechanical performance which is not possessed by the conventional Mg-Li alloys; the alloy has the yield strength being 100-110 MPa at the temperature of 150 DEG C while a conventional material has the yield strength being about 65 MPa at the temperature of 150 DEG C.

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