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Casting magnesium alloy material preparation method

A technology for casting magnesium alloys and intermediate alloys is applied in the field of preparation of magnesium alloy materials to achieve the effect of improving high temperature mechanical properties

Active Publication Date: 2010-12-08
宝鸡金航华颢新材料技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies in the poor heat resistance of ZM-1 alloys in the prior art Mg-Zn series magnesium alloys, the present invention provides a method for preparing cast magnesium alloy materials , increase the content of Zn in the alloy design, control the content of Gd and Zr, through the solid solution strengthening of Zn, the heat resistance and flame retardancy of Gd and the grain refinement of Zr, the ZM-1 magnesium alloy can be improved Comprehensive performance indicators, especially high temperature mechanical properties, improve casting performance

Method used

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  • Casting magnesium alloy material preparation method
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  • Casting magnesium alloy material preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Dosing according to 93.1wt% Mg-5.5wt% Zn-1.0wt% Gd-0.4wt% Zr. The burnout rate of Mg is calculated as 18%, the burnout rate of Zn is negligible, and the burnout rate of Gd is calculated as 40%.

[0026] When the temperature of the crucible reaches 280°C, after spreading a layer of RJ-7 protective solvent on the bottom of the crucible and the wall of the crucible, add 5200g of Mg, the purity of which is 99.99%.

[0027] After the Mg is cleared, when the temperature of the crucible reaches 680°C, add 5.2g C 2 Cl 6 Carry out deslagging and degassing.

[0028] After slagging, add 340g Zn at 710°C. When adding Zn, put Zn in a stirring spoon so that it can be suspended in the middle and upper part of the magnesium alloy melt in the crucible. The purity of Zn is 99.99%. When the crucible was heated to 750° C., 550 g of a commercially available Mg-Gd master alloy was added, and the weight ratio of the Mg-Gd master alloy was Mg:Gd=18:7. When adding, put the Mg-Gd ...

Embodiment 2

[0036] Example 2: Dosing according to 91.5wt% Mg-6.0wt% Zn-2.0wt% Gd-0.5wt% Zr. The burnout rate of Mg is calculated as 18%, the burnout rate of Zn is negligible, and the burnout rate of Gd is calculated as 40%.

[0037]When the temperature of the crucible reaches 300°C, spread a layer of RJ-7 protective solvent on the bottom of the crucible and the wall of the crucible, and then add 5600g of Mg, the purity of which is 99.99%.

[0038] After the Mg is cleared, when the temperature of the crucible reaches 690°C, add 5.5g C 2 Cl 6 Carry out deslagging and degassing.

[0039] After slagging, add 360g Zn at 720°C. When adding, put Zn in a stirring spoon so that it can be suspended in the middle and upper part of the magnesium alloy melt in the crucible. The purity of Zn is 99.99%. When the crucible was heated to 760° C., 1100 g of a commercially available Mg-Gd master alloy was added, and the weight ratio of the Mg-Gd master alloy was Mg:Gd=18:7. When adding, put the Mg-Gd mas...

Embodiment 3

[0043] Example 3: Dosing according to 89.9wt% Mg-6.5wt% Zn-3.0wt% Gd-0.6wt% Zr. The burnout rate of Mg is calculated as 18%, the burnout rate of Zn is negligible, and the burnout rate of Gd is calculated as 40%.

[0044] When the temperature of the crucible reaches 320°C, after spreading a layer of RJ-7 protective solvent on the bottom of the crucible and the wall of the crucible, add 5400g of Mg, the purity of which is 99.99%.

[0045] After the Mg is cleared, when the temperature of the crucible reaches 700°C, add 5.8gC 2 Cl 6 Carry out deslagging and degassing.

[0046] After slagging, add 370g Zn at 730°C. When adding, put Zn in a stirring spoon so that it can be suspended in the middle and upper part of the magnesium alloy melt in the crucible. The purity of Zn is 99.99%. When the crucible was heated to 770° C., 1500 g of a commercially available Mg-Gd master alloy was added, and the weight ratio of the Mg-Gd master alloy was Mg:Gd=18:7. When adding, put the Mg-Gd mas...

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Abstract

The invention discloses a cast magnesium alloy material, which is characterized in that the cast magnesium alloy material is prepared by the following compositions: 4.5 to 6.5 weight percent of zinc, 1.0 to 3.0 weight percent of gadolinium, 0.4 to 0.7 weight percent of zirconium, less than or equal to 0.25 weight percent of impurities (the content of copper is less than or equal to 0.1 percent and the content of nickel is less than or equal to 0.01 percent), and the balance of magnesium. The invention also discloses a method for preparing the cast magnesium alloy material, wherein the cast magnesium alloy material is prepared by addition of the zinc, magnesium-gadolinium interalloy and magnesium-zirconium interalloy. The tensile strength sigma[b] of the cast magnesium alloy at the room temperature is improved from 235 MPa in the prior art to 270 MPa; the yield strength sigma0.2 of the cast magnesium alloy at the room temperature is improved from 140 MPa in the prior art to 175 MPa; and the elongation percentage delta of the cast magnesium alloy at the room temperature is improved from 5 percent in the prior art to 6 percent. Simultaneously, the high-temperature mechanical propertyof the alloy is also obviously improved.

Description

technical field [0001] The invention relates to a preparation method of a magnesium alloy material, in particular to a preparation method of a cast magnesium alloy material. Background technique [0002] Among the Mg-Zn alloys, the ZM-1 magnesium alloy has a high yield strength σ 0.2 , which is commonly referred to as high-strength magnesium alloys. [0003] Document 1 ""National Standard Cast Magnesium Alloy of the People's Republic of China" GB1177" discloses the chemical composition of ZM-1 cast magnesium alloy: 3.5-5.5% Zn, 0.5-1.0% Zr, total amount of impurities ≤ 0.3% (wherein, Cu ≤ 0.1%, Ni≤0.01%), the balance Mg. GB1177 stipulates the room temperature mechanical properties of ZM-1 alloy T1 state sand mold single casting samples: σ b ≥235MPa, σ 0.2 ≥140MPa, δ≥5%. In GB1177, the high temperature mechanical properties of ZM-1 alloy are not specified. [0004] Document 2 "Casting Manual" Volume 3, "Casting Non-ferrous Alloys" 2nd Edition, published by the Machiner...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D21/04C22C1/03C22C23/04
Inventor 杨光昱李杰华介万奇于忠曹磊
Owner 宝鸡金航华颢新材料技术研究院有限公司