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Quasicrystal reinforced cast magnesium lithium alloy and preparation method thereof

A technology for casting magnesium and lithium alloys, which is applied in the field of quasicrystal-strengthened casting magnesium-lithium alloys and its preparation, can solve problems such as the inability to control the uniform distribution of quasicrystals, and achieve the effect of improving utilization rate and use cost, and flexible methods

Active Publication Date: 2019-12-20
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] Example 1: The quasicrystal-strengthened cast magnesium-lithium alloy in this example contains 8% by mass of Li, 5% of Zn, 1% of Y, 1% of Gd, and the balance of Mg; Steps to achieve:

[0018] Step 1. Calculate the content of the quasicrystalline phase in the alloy according to the design composition. Select quasicrystalline Mg3Zn6Y hollow spheres with a wall thickness of 30 micrometers, a wall thickness of 20 micrometers, and a wall thickness of 10 micrometers, and a diameter of 100 micrometers. The thickness of 30 microns accounts for 20% of the total mass of the quasicrystalline hollow spheres, the wall thickness of 20 microns accounts for 20% of the total mass of the quasicrystalline hollow spheres, the remainder is the wall thickness of 10 microns, and the bulk density is 1.54g / cm 3 , So that the bulk density of quasicrystalline hollow spheres is 1.2 times the theoretical density of magnesium-lithium alloy

[0019] Step 2. Then calculate the percentage of the remaining c...

Embodiment 2

[0025] Example 2: The quasicrystal-strengthened cast magnesium-lithium alloy in this example contains 15% by mass of Li, 8% of Zn, 5% of Y, and the balance of Mg; this 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 quasicrystalline Mg3Zn6Y hollow spheres with a wall thickness of 30 microns, a wall thickness of 20 microns, and a wall thickness of 10 microns, with a diameter of 300 microns. The thickness of 30 microns accounts for 10% of the total mass of the quasicrystalline hollow spheres, the wall thickness of 20 microns accounts for 30% of the total mass of the quasicrystalline hollow spheres, the remainder is the wall thickness of 10 microns, and the bulk density is 1.60g / cm 3 , Making the bulk density of quasicrystalline hollow spheres 1.1 times the theoretical density of magnesium-lithium alloy

[0027] Step 2. Then calculate the percentage content of the rema...

Embodiment 3

[0031] Example 3: The quasicrystal-strengthened cast magnesium-lithium alloy in this example contains 15% by mass of Li, 8% of Zn, 5% of Y, and 5% of Gd, the balance is Mg; it is through the following steps Realized:

[0032] Step 1. Calculate the content of the quasicrystalline phase in the alloy according to the design composition. Select quasicrystalline Mg3Zn6Y hollow spheres with a wall thickness of 30 micrometers, a wall thickness of 20 micrometers, and a wall thickness of 10 micrometers. The thickness of 30 microns accounts for 20% of the total mass of the quasicrystalline hollow spheres, the wall thickness of 20 microns accounts for 30% of the total mass of the quasicrystalline hollow spheres, the remainder is the wall thickness of 10 microns, and the bulk density is 1.95g / cm 3 , So that the bulk density of quasicrystalline hollow spheres is 1.2 times the theoretical density of magnesium-lithium alloy

[0033] Step 2. Then calculate the percentage of the remaining component...

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Abstract

The invention discloses a quasicrystal reinforced cast magnesium lithium alloy and a preparation method thereof and belongs to the field of cast alloy technologies. Through the quasicrystal reinforcedcast magnesium lithium alloy and the preparation method thereof, the problem that when the quantity of quasicrystal phases is increased in an existing quasicrystal reinforced cast magnesium lithium alloy, uniform quasicrystal distribution cannot be controlled can be solved. The quasicrystal reinforced cast magnesium lithium alloy contains, by mass, 8%-15% of Li, 5%-8% of Zn, 0-15% of Al, 0-5% ofY, 0-5% of Gd, and the balance Mg. When the quasicrystal reinforced cast magnesium lithium alloy is prepared, quasicrystal phases are added into alloy melt in batches in a hollow sphere mode, after adding, the temperature of the melt is 720-740 DEG C and is maintained for 30 minutes, and after the furnace temperature is adjusted to 680-700 DEG C, the melt is poured into a mold to form an alloy cast ingot. According to the quasicrystal reinforced cast magnesium lithium alloy and the preparation method thereof, the purposes that distribution uniformity is improved while the quasicrystal contentis increased are achieved, and the distribution uniformity of the as-cast quasicrystal reinforced phases is improved by 80% or above.

Description

Technical field [0001] The invention belongs to the technical field of casting alloys; in particular, it relates to a quasicrystalline strengthened casting magnesium-lithium alloy and a preparation method thereof. Background technique [0002] Cast magnesium-lithium alloy due to its extremely low density (usually between 1.30 and 1.85g / cm 3 Within the scope), it has a wide range of application potentials in 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 while increasing the absolute strength of the alloy; the formation of quasi-crystal 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 in the alloy during solidification, so the distribution and quantity of quasicrystals ca...

Claims

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Application Information

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Patent Type & Authority Applications(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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