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A kind of preparation method of high-strength mg-li-sn-zn ultralight alloy

A mg-li-sn-zn, ultra-light alloy technology, applied in the field of metal materials, can solve the problems of low strength and difficult to meet engineering applications, and achieve the effects of simple operation, promotion of aging precipitation, and improvement of mechanical properties

Active Publication Date: 2020-11-20
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a major problem limiting the application of magnesium-lithium alloys is that their strength is low, which is difficult to meet the requirements of engineering applications. Therefore, the development of new high-strength magnesium-lithium alloys has very important value

Method used

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  • A kind of preparation method of high-strength mg-li-sn-zn ultralight alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The composition and mass percent of the high-strength Mg-Li-Sn-Zn ultra-light alloy are: 6wt% Li, 3wt% Sn, 0.5wt% Zn, and the total amount of impurity elements Si, Fe, Cu and Ni is less than 0.02wt%, the balance is Mg.

[0046] Raw material smelting steps:

[0047] i) Weigh pure Mg, pure Sn, pure Zn, and pure Li according to the above mass percentages, weigh lithium salt solvent according to 5% of the mass of the prepared alloy, and then preheat and dry all the above-mentioned raw materials at 180 ° C for more than 3 hours to obtain Dry pure Mg, pure Sn, pure Zn, pure Li and lithium salt solvent;

[0048] ii) putting the dried Mg and lithium salt solvent obtained in step i) into a crucible resistance furnace for heating and melting to obtain magnesium liquid;

[0049] iii) Heating the magnesium liquid obtained in step ii) to 740°C, then adding the dried pure Sn obtained in step i), heating until all of it melts into liquid metal, and after the temperature of the liqui...

Embodiment 2

[0056] The components and mass percentages of the high-strength Mg-Li-Sn-Zn ultralight alloy are: 8wt% Li, 4wt% Sn, 1wt% Zn, and the total amount of impurity elements Si, Fe, Cu and Ni is less than 0.02 wt%, the balance is Mg.

[0057] Raw material smelting steps:

[0058] i) Weigh pure Mg, pure Sn, pure Zn, and pure Li according to the above mass percentages, weigh lithium salt solvent according to 8% of the mass of the prepared alloy, and then preheat and dry all the above-mentioned raw materials at 200 ° C for more than 3 hours to obtain Dry pure Mg, pure Sn, pure Zn, pure Li and lithium salt solvent;

[0059] ii) putting the dried Mg and lithium salt solvent obtained in step i) into a crucible resistance furnace for heating and melting to obtain magnesium liquid;

[0060] iii) Heating the magnesium liquid obtained in step ii) to 720°C, then adding the dried pure Sn obtained in step i), heating until all of it melts into a metal liquid, and after the temperature of the me...

Embodiment 3

[0067] The composition and mass percent of the high-strength Mg-Li-Sn-Zn ultralight alloy are: 10wt% Li, 6wt% Sn, 1.5wt% Zn, and the total amount of impurity elements Si, Fe, Cu and Ni is less than 0.02wt%, the balance is Mg.

[0068] Raw material smelting steps:

[0069] i) Weigh pure Mg, pure Sn, pure Zn, and pure Li according to the above mass percentages, weigh lithium salt solvent according to 8% of the mass of the prepared alloy, and then preheat and dry all the above-mentioned raw materials at 250 ° C for more than 3 hours to obtain Dry pure Mg, pure Sn, pure Zn, pure Li and lithium salt solvent;

[0070] ii) putting the dried Mg and lithium salt solvent obtained in step i) into a crucible resistance furnace for heating and melting to obtain magnesium liquid;

[0071] iii) Heat the magnesium liquid obtained in step ii) to 700°C, then add the dried pure Sn obtained in step i), heat until all of it melts into a metal liquid, and after the temperature of the metal liquid...

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Abstract

The invention provides a method for preparing a high-strength Mg-Li-Sn-Zn ultralight alloy, the preparation method comprising: a raw material smelting step, weighing pure Mg, pure Sn, pure Zn, pure Li and a lithium salt solvent, and then Through the steps of drying material, melting Mg, adding Sn and Zn, adding Li, and casting, casting into Mg-Li-Sn-Zn alloy ingot; plastic deformation step, homogenizing the obtained Mg-Li-Sn-Zn alloy ingot , and then carry out plastic deformation processing; in the heat treatment step, the Mg-Li-Sn-Zn alloy ingot that has completed the plastic deformation processing is subjected to aging treatment to obtain a high-strength Mg-Li-Sn-Zn ultra-light alloy. The prepared Mg‑Li‑Sn‑Zn ultralight alloy has the characteristics of low density, high strength and high plasticity.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and relates to a preparation method of a magnesium alloy, in particular to a preparation method of a high-strength Mg-Li-Sn-Zn ultralight alloy. Background technique [0002] Magnesium (Mg) alloy has the advantages of low density, wide range of sources, high specific strength and specific stiffness, etc., and is known as "the green engineering material of the 21st century". By adding Li to magnesium alloys for alloying, its density can be further reduced and the plasticity of magnesium alloys can be improved. Therefore, magnesium-lithium alloys have broad potential application prospects in aerospace and other fields that require high weight reduction. At present, a major problem limiting the application of magnesium-lithium alloys is that their strength is low, which is difficult to meet the requirements of engineering applications. Therefore, the development of new high-strength magnesiu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22F1/06C22C1/02
CPCC22C1/02C22C23/00C22F1/06
Inventor 张扬张文杰丛孟启卢雅琳李小平
Owner JIANGSU UNIV OF TECH
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