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Preparation method of mg-zn-y-gd-zr alloy with high strength and high toughness

A high-toughness, high-strength technology, applied in the field of alloys and their preparation, can solve the problem of high rare earth content in alloys

Active Publication Date: 2017-01-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing a high-strength and high-toughness Mg-Zn-Y-Gd-Zr alloy in order to solve the technical problem of high rare earth content in the alloy prepared by the existing method

Method used

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  • Preparation method of mg-zn-y-gd-zr alloy with high strength and high toughness
  • Preparation method of mg-zn-y-gd-zr alloy with high strength and high toughness
  • Preparation method of mg-zn-y-gd-zr alloy with high strength and high toughness

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specific Embodiment approach 1

[0021] Specific Embodiment 1: In this embodiment, the high-strength and high-toughness Mg-Zn-Y-Gd-Zr alloy consists of 8-12% Zn, 1-6% Y, 1-6% Gd, 0.3-0.7% Zr and The balance is composed of Mg.

specific Embodiment approach 2

[0022] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the high-strength and high-toughness Mg-Zn-Y-Gd-Zr alloy consists of 8.12% Zn, 5.95% Y, 1.01% Gd, 0.31% Zr and The balance is composed of Mg. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Specific embodiment three: The difference between this embodiment and specific embodiment one or two is that the high-strength and high-toughness Mg-Zn-Y-Gd-Zr alloy consists of 10.06% Zn, 4.75% Y, 1.32% Gd, Composition of 0.46% Zr and balance Mg. Others are the same as those in the first or second embodiment.

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Abstract

The invention discloses a method for preparing a high-strength and high-toughness Mg-Zn-Y-Gd-Zr alloy, which relates to an alloy and a preparation method thereof. The invention aims to solve the technical problem that the rare earth content in the alloy prepared by the existing method is relatively high. The alloy of the present invention consists of Zn, Y, Gd, Zr and Mg. Preparation method: Weigh the raw materials, add pure magnesium into the crucible, heat the crucible, and then pass a mixed gas of CO2 and SF6 into the crucible for protection; after the pure magnesium is completely melted, add other raw materials in turn; prepare ingots; Homogenize the ingot and then extrude it, keep it warm at the aging temperature, and cool it to get it. The rare earth total content of the present invention is lower than 6wt%, obtains stable quasicrystalline phase and long-period ordered structural phase (LPSO) by improving zinc content and Zn / RE atomic ratio, the tensile strength of the alloy of the present invention is greater than 500MPa, and elongation is greater than 5%. The invention belongs to the field of alloy preparation.

Description

technical field [0001] The invention relates to an alloy and a preparation method thereof. Background technique [0002] As the lightest commercial metal engineering structural material, magnesium alloy has the advantages of high specific strength and specific elastic modulus, superior damping, shock absorption and noise reduction performance, good casting formability, and easy recycling. It is known as "green structural material in the 21st century". ", which has broad application prospects. In recent years, magnesium and its alloys have attracted extensive attention as lightweight structural materials. Among them, rare earth magnesium alloys have excellent mechanical properties and heat resistance at room temperature, especially deformed magnesium alloys with high rare earth content containing a large amount of Gd and Y have ultra-high strength and high toughness, and their tensile strength is higher than 500MPa, and their tensile elongation is higher than 5% (Effect ofa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/04C22C1/03C22F1/06
Inventor 郑明毅姜汉斯乔晓光池元清吴昆
Owner HARBIN INST OF TECH
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