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In-situ synthesizing quasi-crystal and approximate phase reinforced high-strength ultra-tough magnesium alloy and preparation method thereof

An in-situ synthesis and magnesium alloy technology, which is applied in the field of magnesium alloy materials, the preparation of magnesium alloy materials, in-situ synthesis of quasicrystals and similar phase particle-reinforced high-strength and ultra-high-toughness magnesium alloy materials, can solve the problem of low strength and toughness. Poor problems, to achieve the effect of expanding the application field

Inactive Publication Date: 2006-06-21
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of low strength and poor toughness of existing magnesium alloy materials, the object of the present invention is to provide a high-strength super-tough magnesium alloy with in-situ synthesis of quasicrystals and approximate phase reinforcement. This magnesium alloy material not only has high strength, but also Has good toughness

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  • In-situ synthesizing quasi-crystal and approximate phase reinforced high-strength ultra-tough magnesium alloy and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0035] The alloy composition (weight percentage) is: 5% Zn, 2% Y, 1% Ce, 1% Nd, the total content of impurity elements Fe, Cu, Ni is less than 0.01%, and the rest is Mg.

[0036] The pure magnesium is completely melted in the resistance furnace, and the melting process is in (CO 2 +0.5%SF 6 ) Under gas protection, add pure Zn, Mg-Y, Mg-Ce and Mg-Nd master alloys in the above proportions, and stir to control the total content of impurity elements Fe, Cu, and Ni to be less than 0.01%. After they are completely melted, Continue to heat up to 750°C, then stand for 10 minutes, cast at 700°C-720°C, remove the slag during the casting process and pass protective gas to protect the liquid surface. After solidification, it will become a conventional solidified magnesium alloy ingot; then remove the magnesium alloy casting Dirt such as oxide film on the surface of the ingot, the pressure in the vacuum chamber reaches 10 -2 When Pa is below Pa, refill it under the protection of high-purity Ar...

Embodiment 2

[0039] The alloy composition (weight percentage) is: 4% Zn, 1.2% Y, 1% Ce, 0.5% Nd, the total content of impurity elements Fe, Cu, Ni is less than 0.01%, and the rest is Mg.

[0040] The pure magnesium is completely melted in the resistance furnace, and the melting process is in (CO 2 +0.5%SF 6 ) Under gas protection, add pure Zn, Mg-Y, Mg-Ce and Mg-Nd master alloys according to the above proportions, and stir to control the total content of Fe, Cu and Ni to be less than 0.01%. After the complete dissolution, continue to raise the temperature To 750°C, then stand for 10 minutes, cast at 700°C to 720°C, remove the slag and protect the liquid surface with protective gas during the casting process, and form a conventional solidified magnesium alloy ingot after solidification; then remove the surface of the magnesium alloy ingot Oxide film and other dirt, the pressure in the vacuum chamber reaches 10 -2 When Pa is below, then fill it under the protection of high-purity Ar atmosphere (...

Embodiment 3

[0043] The alloy composition (weight percentage) is: 6.5% Zn, 2.6% Y, 0.8% Ce, 1.2% Nd, the total content of impurity elements Fe, Cu, Ni is less than 0.01%, and the rest is Mg.

[0044] The pure magnesium is completely melted in the resistance furnace. During the melting process, the gas is in (CO 2 +0.5%SF 6 ) Under gas protection or industrial magnesium alloy special solvent protection, add pure Zn and Mg-Y, Mg-Ce and Mg-Nd master alloys in the above proportions, and stir to control the total content of Fe, Cu and Ni to be less than 0.01% After it is completely melted, continue to heat up to 740°C, then let it stand for 10 minutes, and cast at 700°C-720°C. During the casting process, remove the slag and protect the liquid surface with protective gas. After solidification, it will become a conventional solidified ingot; Remove the oxide film and other dirt on the surface of the ingot, the pressure in the vacuum chamber reaches 10 -2 Pa below, then fill it under the protection of...

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Abstract

The invention discloses an in-situ synthesizing quasi-crystal and approximate phase reinforced high-strength ultra-tough magnesium alloy and preparation method, wherein the constituents (by weight percent) of the alloy include, Zn 1-10%, Y 0.1-6%, Ce 0-1.5%, Re 0-2%, Fe<0.005%, Cu<0.02%, Ni<0.002%, and balancing Mg. The preparing process comprises utilizing the conventional solidification method by the proportion, then using flash setting single-roller combing flow mode, finally carrying out reciprocal extrusion large plastic deformation.

Description

Technical field [0001] The invention belongs to the technical field of metal materials and metallurgy, and relates to a magnesium alloy material, in particular to a high-strength ultra-high toughness magnesium alloy material reinforced by in-situ synthesized quasicrystals and similar phase particles. The invention also relates to this magnesium alloy material The preparation method. Background technique [0002] Magnesium alloy has significant advantages such as low specific gravity, high specific strength and specific rigidity, and low raw material prices, and has become the material of choice for modern automobiles, electronics, communications and other industries. Although magnesium alloys have many advantages, traditional magnesium alloys still have problems such as low strength, poor toughness, difficulty in plastic processing, and poor high-temperature creep resistance, which limit their application as certain structural parts. According to Hall-Petch theory, the grain size...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00B22D17/00C22C1/02C22F1/06
Inventor 徐春杰张忠明郭学锋
Owner XIAN UNIV OF TECH
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