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Ultrahigh-strength rare earth-magnesium alloy board and preparation method thereof

A technology of alloy sheet and rare earth magnesium, applied in the field of magnesium alloy sheet and its preparation, can solve the problems of coarse grain, uneven structure, poor performance, etc., and achieve the effect of fine grain and uniform structure

Inactive Publication Date: 2012-02-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims to solve the problems of coarse grain, uneven structure and poor performance in the magnesium alloy plate prepared by the existing rolling method, and provides an ultra-high-strength rare earth magnesium alloy plate and its preparation method

Method used

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  • Ultrahigh-strength rare earth-magnesium alloy board and preparation method thereof
  • Ultrahigh-strength rare earth-magnesium alloy board and preparation method thereof
  • Ultrahigh-strength rare earth-magnesium alloy board and preparation method thereof

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specific Embodiment approach 1

[0010] Specific Embodiment 1: According to the mass fraction of an ultra-high-strength rare earth magnesium alloy plate in this embodiment, 2.0% to 17.0% Gd, 3.0% to 18.0% Y, 0.5% to 3.5% Zn, 0.1% to 1.5% Zr and 76.0% ~94.0% Mg, and the sum of the mass fractions of Gd and Y in the ultra-high-strength rare earth magnesium alloy plate is m, 5.0%<m<20.0%.

[0011] The ultra-high-strength rare-earth magnesium alloy plate prepared in this embodiment has fine grains and uniform structure.

[0012] The ultra-high-strength rare-earth magnesium alloy sheet prepared in this embodiment is tested at room temperature, and it can be seen that the tensile strength is 460MPa-520MPa, the yield strength is 360MPa-430MPa, and the elongation is 4%-20%.

specific Embodiment approach 2

[0013] Specific embodiment two: In this embodiment, an ultra-high-strength rare-earth magnesium alloy plate and its preparation method are specifically completed according to the following steps:

[0014] 1. Preparation of rare earth magnesium alloy ingots: firstly, according to the mass fraction of 2.0% ~ 17.0% Gd, 3.0% ~ 18.0% Y, 0.5% ~ 3.5% Zn, 0.1% ~ 1.5% Zr and 76.0% ~ 94.0% Mg proportioning materials , and the proportioning material satisfies that the sum of the mass fractions of Gd and Y is m, 5.0%≤m≤20.0%, and then prepared into a rare earth magnesium alloy ingot by sand casting, metal mold casting or semi-continuous casting; 2. Preparation Rolling billet: the rare earth magnesium alloy ingot prepared in step 1 is subjected to homogenization annealing treatment at 400 ° C ~ 550 ° C for 6 h ~ 24 h, and then the rare earth magnesium alloy ingot after homogenization annealing treatment is cut into a thickness of 15 mm ~ 300mm, 60mm~500mm in width, and 100mm~3000mm in leng...

specific Embodiment approach 3

[0028] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the materials described in step one are pure Mg ingot, Mg-Gd master alloy, Mg-Y master alloy, pure Zn ingot, Mg-Zn intermediate alloys and Mg-Zr master alloys. Others are the same as in the second embodiment.

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Abstract

The invention provides an ultrahigh-strength rare earth-magnesium alloy board and a preparation method thereof, relating to a magnesium alloy board and a preparation method thereof. By the invention, the problems of rough grains, non-uniform structure and poor performance of the magnesium alloy board prepared by the existing rolling method are solved. The ultrahigh-strength rare earth-magnesium alloy board is prepared from the components in percentage by mass: 2.0-17.0% of Gd, 3.0-18.0% of Y, 0.5-3.5% of Zn, 0.1%-1.5% of Zr and 76.0-94.0% of Mg. The preparation method comprises the following steps of: firstly preparing a rare earth-magnesium alloy cast ingot by sand casting, metal casting or semi-continuous casting; then homogenizing and annealing, cutting into rolling blanks, and then carrying out breakdown rolling to obtain a rolled board; and finally aging to obtain the ultrahigh-strength rare earth-magnesium alloy board. The preparation method provided by the invention is mainly used for preparing ultrahigh-strength rare earth-magnesium alloy boards.

Description

technical field [0001] The invention relates to a magnesium alloy plate 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 many magnesium alloys, rare earth magnesium alloys have good creep resistance. Therefore, a lot of energy has been devoted to research on how to improve the strength of rare earth magnesium alloys. WE54 alloy is currently the most widely used commercial high-strength magnesium alloy containing Nd and Y. This alloy has the characteristics of age harden...

Claims

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Application Information

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IPC IPC(8): C22C23/06C22C1/03C22F1/06
Inventor 郑明毅徐超陈英时王尔德杜玉洲乔晓光胡小石王晓军吴昆
Owner HARBIN INST OF TECH
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