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A kind of quasicrystal strengthened casting magnesium-lithium alloy and preparation method thereof

A technology for casting magnesium and lithium alloys, which is applied in the field of quasicrystal strengthening casting magnesium-lithium alloys and their preparation, can solve the problems of uncontrollable uniform distribution of quasicrystals, and achieves improved utilization rate and use cost, improved distribution uniformity, and increased quasicrystals. effect of crystal content

Active Publication Date: 2021-05-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention aims to solve the problem that the uniform distribution of quasicrystals cannot be controlled when the number of quasicrystal phases is increased in the existing quasicrystal strengthened cast magnesium-lithium alloy, and proposes a quasicrystal strengthened cast magnesium-lithium alloy and a preparation method thereof to realize quasicrystal strengthened casting Manufacture of magnesium-lithium alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: In this embodiment, the quasicrystalline strengthened cast magnesium-lithium alloy contains 8% Li by mass percentage, 5% Zn, 1% Y, 1% Gd, and the balance is Mg; through the following Steps to achieve:

[0018] Step 1, calculate the content of the quasicrystalline phase in the alloy according to the design composition, select the quasicrystalline Mg3Zn6Y hollow sphere whose wall thickness is 30 microns, the wall thickness is 20 microns and the wall thickness is 10 microns, and the diameter is 100 microns. A thickness of 30 microns accounts for 20% of the total mass of quasicrystalline hollow spheres, a wall thickness of 20 microns accounts for 20% of the total mass of quasicrystalline hollow spheres, and the remainder is 10 microns in wall thickness, with a bulk density of 1.54g / cm 3 , so that the random packing density of quasicrystalline hollow spheres is 1.2 times the theoretical density of the magnesium-lithium alloy;

[0019] Step 2, then calculate th...

Embodiment 2

[0025] Embodiment 2: In this embodiment, the quasicrystalline strengthened cast magnesium-lithium alloy contains 15% Li by mass percentage, 8% Zn, 5% Y, and the balance is Mg; it is achieved through the following steps:

[0026] Step 1, calculate the content of the quasicrystalline phase in the alloy according to the design composition, select the quasicrystalline Mg3Zn6Y hollow sphere whose wall thickness is 30 microns, the wall thickness is 20 microns and the wall thickness is 10 microns, and the diameter is 300 microns. A thickness of 30 microns accounts for 10% of the total mass of quasicrystalline hollow spheres, a wall thickness of 20 microns accounts for 30% of the total mass of quasicrystalline hollow spheres, and the remainder is 10 microns in wall thickness, with a bulk density of 1.60g / cm 3 , so that the random packing density of the quasicrystalline hollow sphere is 1.1 times the theoretical density of the magnesium-lithium alloy;

[0027] Step 2, then calculate th...

Embodiment 3

[0031] Embodiment 3: In this embodiment, the quasicrystalline strengthened cast magnesium-lithium alloy contains 15% Li by mass percentage, 8% Zn, 5% Y, 5% Gd and the balance is Mg; it is through the following steps Achieved:

[0032] Step 1, calculate the content of the quasicrystalline phase in the alloy according to the design composition, select the quasicrystalline Mg3Zn6Y hollow sphere whose wall thickness is 30 microns, the wall thickness is 20 microns and the wall thickness is 10 microns, and the diameter is 200 microns. A thickness of 30 microns accounts for 20% of the total mass of quasicrystalline hollow spheres, a wall thickness of 20 microns accounts for 30% of the total mass of quasicrystalline hollow spheres, and the remainder is 10 microns in wall thickness, with a bulk density of 1.95g / cm 3 , so that the random packing density of quasicrystalline hollow spheres is 1.2 times the theoretical density of the magnesium-lithium alloy;

[0033] Step 2, then calculat...

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Abstract

The invention discloses a quasi-crystal strengthened cast magnesium-lithium alloy and a preparation method thereof, belonging to the technical field of cast alloys. The invention aims to solve the problem that the uniform distribution of quasicrystals cannot be controlled when the number of quasicrystal phases is increased in the existing quasicrystal strengthened cast magnesium-lithium alloy. The quasicrystalline strengthened cast magnesium-lithium alloy of the present invention contains 8%-15% Li, 5%-8% Zn, 0-15% Al, 0-5% Y, and 0-5% in mass percent Gd, the rest is Mg. When preparing the quasi-crystalline strengthened cast magnesium-lithium alloy, the quasi-crystalline phase is added to the alloy melt in batches in the form of hollow spheres. After the addition, the melt is kept at 720-740°C for 30 minutes, and the furnace temperature is adjusted to 680-700°C before pouring into a mold to form an alloy ingot. The invention achieves the purpose of increasing the quasi-crystal content and simultaneously improving its distribution uniformity, and the distribution uniformity of the as-cast quasi-crystal strengthening phase is increased by more than 80%.

Description

technical field [0001] The invention belongs to the technical field of casting alloys; in particular, it relates to a quasi-crystal strengthened casting magnesium-lithium alloy and a preparation method thereof. Background technique [0002] Cast magnesium-lithium alloys because of their extremely low density (usually 1.30-1.85g / cm 3 Within the range), it has a wide range of application potential in the fields of aviation, aerospace, automobiles, ships, underwater and military industries. With the increasing demand for such cast magnesium-lithium alloy components, magnesium-lithium alloys require low density and at the same time increase the absolute strength of the alloy; forming quasi-crystalline reinforced magnesium-lithium alloys is a potential technical route, but at present The quasicrystal reinforcement phase in the cast magnesium-lithium alloy and the magnesium alloy matrix are precipitated in situ from the alloy during solidification, so the distribution and number ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C1/03
CPCC22C1/03C22C23/00
Inventor 邹鹑鸣魏尊杰王宏伟
Owner HARBIN INST OF TECH
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