Microscale Al-containing rare earth wrought magnesium alloy and preparation method thereof

A technology of wrought magnesium alloy and rare earth magnesium, which is applied in the fields of industrial magnesium alloy, rare earth wrought magnesium alloy and its preparation, and can solve the problems of recovery of rare earth magnesium alloy processing residues, etc.

Active Publication Date: 2015-05-27
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to solve the problem of recycling the remaining materials of the rare earth magnesium alloy with aluminum added in the processi

Method used

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  • Microscale Al-containing rare earth wrought magnesium alloy and preparation method thereof
  • Microscale Al-containing rare earth wrought magnesium alloy and preparation method thereof
  • Microscale Al-containing rare earth wrought magnesium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
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preparation example Construction

[0058] The preparation method of the rare earth deformed magnesium alloy containing a trace amount of Al of the present invention comprises the following steps:

[0059] 1 Material preparation.

[0060] There are two ways to prepare materials:

[0061] (1) new alloy

[0062] Prepare materials according to the weight percentage of the design magnesium alloy composition of the present invention; Wherein, Zr is to prepare materials with Mg-Zr master alloy, in this master alloy, the composition content of Zr is 30~40wt%, all the other are Mg; Remove master alloy Mg in Mg-Zr and Mg in other magnesium alloys are prepared as pure magnesium ingots; Gd, Y, and Nd are added in the form of pure metals.

[0063] (2) Surplus material recovery

[0064] The deformed rare earth magnesium alloy is pressed to remove the outer skin to reduce impurities. The Al content is detected online during the smelting process, and if it is less than 0.4%, it is supplemented according to the volume quali...

Embodiment 1

[0096] The melting alloy composition of this example is Mg-6.5Gd-3.0Y-2.0Zn-0.3Nd-0.3Zr-0.4Al. (RE yield is 85%, Zr yield is 25%, Al yield is 100%, Zn yield is 90%)

[0097] 1 material preparation

[0098] Zr is prepared with Mg-Zr master alloy. In the master alloy, the composition content of Zr is 30%, and the rest is Mg; except the Mg in the master alloy Mg-Zr, the Mg in the rest of the magnesium alloy is pure magnesium ingot Carry out material preparation; Gd, Y, Nd are added in the form of pure metal, and the design addition amount is:

[0099] Table 1 Alloy Design Composition Table (wt.%)

[0100]

[0101] According to the amount of experimental materials and the size of the crucible, this experiment is designed to smelt 100kg. Considering the loss of alloy elements during smelting, the designed alloy composition and raw material addition are shown in Table 2. In order to ensure rapid melting, cut the raw materials into small pieces, the size of which should be put in...

Embodiment 2

[0120] The melted alloy composition of this example is Mg-7Gd-5Y-2Zn-1.5Nd-0.5Zr-0.4Al. (RE yield is 85%, Zr yield is 25%, Al yield is 100%, Zn yield is 90%)

[0121] 1 material preparation

[0122] The deformed rare earth magnesium alloy is pressed to remove the outer skin to reduce impurities. The Al content is detected online during the smelting process, and if it is less than 0.4%, it is supplemented according to the volume quality.

[0123] Raw materials are rare earth magnesium alloy Mg-7Gd-5Y-1.5Nd-0.5Zr scrap, pure Al, pure Zn; the designed dosage is:

[0124] Table 3 Alloy Design Composition Table (wt.%)

[0125]

[0126] According to the amount of experimental materials and the size of the crucible, this experiment is designed to smelt 100kg. Considering the loss of alloy elements during smelting, the design alloy composition and raw material addition are shown in Table 4. In order to ensure rapid melting, cut the raw materials into small pieces, the size of w...

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Abstract

The invention relates to a microscale Al-containing rare earth wrought magnesium alloy and its preparation method and belongs to the scope of industrial magnesium alloy. The magnesium alloy comprises, by weight, 6.5-15.0% of Gd, 3.0-5.5% of Y, 2.0-4.0% of Zn, 0.3-1.5% of Nd, 0.3-0.9% of Zr, 0.4-1.0% of Al and the balance of Mg. The preparation method of the magnesium alloy comprises the steps as follows: raw material preparation, alloy melting, alloy semi-solid extrusion, homogenization treatment, redeformation, cooling and pre-stretching treatment, ageing strengthening treatment and the like. By fully utilizing the defect that Al is preferentially combined with rare earth and Zr in alloy to form a stable phase, Zn element is added to make up insufficiencies and the wrought magnesium alloy with high performance is prepared. The recovery effect of rare earth elements is enhanced, and semi-solid forming and solid plastic forming are combined.

Description

technical field [0001] The invention relates to a rare-earth deformed magnesium alloy containing trace amounts of Al and a preparation method thereof, belonging to the category of industrial magnesium alloys. Background technique [0002] Rare-earth magnesium alloys are a class of magnesium alloy materials that have been studied extensively, and Mg-Gd-Y-Zr alloys, as a typical class of rare-earth magnesium alloys, are one of the current research hotspots. Since the solid solubility of Gd and Y elements in magnesium is large, the solid solubility decreases rapidly with the decrease of temperature, and aging strengthening can be carried out. Therefore, Mg-Gd-Y-Zr alloy is a kind of alloy that can be strengthened by heat treatment. Cast magnesium alloys have been widely developed and applied due to their good formability, but in addition to special casting alloys, ordinary cast magnesium alloys inevitably have casting defects, which limit their application as high load-bearing ...

Claims

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Application Information

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IPC IPC(8): C22C23/06C22C1/02C22F1/06
CPCC22C1/02C22C23/06C22F1/06
Inventor 马鸣龙张奎李兴刚李永军袁家伟石国梁张国栋
Owner GRIMAT ENG INST CO LTD
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