Heatproof magnesium alloy material with high strength and preparation method thereof

A magnesium alloy and high-strength technology, which is applied in the field of high-strength heat-resistant magnesium alloy materials and the preparation of high-strength heat-resistant magnesium alloy materials, can solve problems such as poor heat resistance, and achieve improved mechanical properties at room temperature and high temperature. , The effect of excellent corrosion resistance

Inactive Publication Date: 2009-12-16
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiency of poor heat resistance of ZM-6 alloy in the Mg-RE-Zr series magnesium alloy in the prior art, the present invention provides a high-strength heat-resistant magnesium alloy material

Method used

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  • Heatproof magnesium alloy material with high strength and preparation method thereof
  • Heatproof magnesium alloy material with high strength and preparation method thereof
  • Heatproof magnesium alloy material with high strength and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Example 1: Dosing according to 95.2(wt%)Mg-2.3(wt%)Nd-2.0(wt%)Gd-0.1(wt%)Zn-0.4(wt%)Zr. The burning rate of Mg is calculated as 18%, the burning rate of Zn can be ignored, the burning rate of Nd is calculated as 15%, the burning rate of Gd is calculated as 40%, and Zr is calculated as 1.2 (wt) of the total amount added. %)Calculation.

[0023] When the temperature of the crucible reaches 300°C, after spreading a layer of RJ-7 protective solvent on the bottom of the crucible and the wall of the crucible, add 5300g of Mg, the purity of which is 99.99%.

[0024] After the Mg is cleared, when the temperature of the crucible reaches 710°C, add 6gC 2 Cl 6 Carry out deslagging and degassing.

[0025] After slagging, add 10g 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%. Add 800g 72 (wt%) Mg-28 (wt%) Gd master alloy when crucible...

Embodiment 2

[0029] Example 2: Dosing according to 95.85(wt%)Mg-2.0(wt%)Nd-1.5(wt%)Gd-0.05(wt%)Zn-0.6(wt%)Zr. The burning rate of Mg is calculated as 18%, the burning rate of Zn can be ignored, the burning rate of Nd is calculated as 15%, the burning rate of Gd is calculated as 40%, and Zr is calculated as 1.2 (wt) of the total amount added. %)Calculation.

[0030] When the temperature of the crucible reaches 310°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%.

[0031] After the Mg is cleared, when the temperature of the crucible reaches 705°C, add 6.5gC 2 Cl 6 Carry out deslagging and degassing.

[0032] After slagging, add 8g of Zn at 710°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%. Add 670g72 (wt%) Mg-28 (wt%) Gd master alloy when crucible is he...

Embodiment 3

[0037] Example 3: Dosing according to 95.6(wt%)Mg-2.3(wt%)Nd-1.4(wt%)Gd-0.1(wt%)Zn-0.6(wt%)Zr. The burning rate of Mg is calculated as 18%, the burning rate of Zn can be ignored, the burning rate of Nd is calculated as 15%, the burning rate of Gd is calculated as 40%, and Zr is calculated as 1.2 (wt) of the total amount added. %)Calculation.

[0038] When the temperature of the crucible reaches 305°C, after spreading a layer of RJ-7 protective solvent on the bottom of the crucible and the wall of the crucible, add 5000g of Mg, the purity of which is 99.99%.

[0039] After the Mg is cleared, when the temperature of the crucible reaches 700°C, add 5.5gC 2 Cl 6 Carry out deslagging and degassing.

[0040] After slagging, add 9g of Zn at 700°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%. Add 660g 72 (wt%) Mg-28 (wt%) Gd master alloy when crucible is hea...

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Abstract

The invention discloses a heatproof magnesium alloy material with high strength, which is characterized in that the heatproof magnesium alloy material with high strength is prepared by 2.5-3.5wt% of Nd, 1.0-2.0wt% of Gd, 0.05-0.1wt% of Zn, 0.4-0.6wt% of Zr, at most 0.25wt% of impurity (wherein, Cu is at most 0.1%, and Ni is at most 0.01%) and the balance of Mg. The invention also discloses a preparation method of the heatproof magnesium alloy material with high strength. By controlling time and temperature for adding Zn, Mg-Gd preliminary alloy and Mg-Zr preliminary alloy, the room temperature tensile strength alpha b of the prepared heatproof magnesium alloy material with high strength is improved to 270MPa from 230MPa of the prior art, yield strength alpha is improved to 205MPa from 135MPa of the prior art, and elongation rate delta is improved to 3.5% from 3% of the prior art. Meanwhile, the 300 DEG C high-temperature instant tensile strength alpha b is improved to 141MPa from 109MPa of the prior art, and the 300 DEG C high-temperature instant tensile strength alpha is improved to 123MPa from 79MPa of the prior art.

Description

technical field [0001] The invention relates to a magnesium alloy material, especially a high-strength heat-resistant magnesium alloy material, and a preparation method of the high-strength heat-resistant magnesium alloy material. Background technique [0002] Among the Mg-RE-Zr alloys, ZM-6 (MЛ10 in the Russian ΓOCT2856 standard) magnesium alloy is a high-strength heat-resistant magnesium alloy with Nd as the main alloying element. Due to the large solid solubility of Nd in Mg, the alloy in the state of solution treatment + artificial aging (T6) not only has better high temperature performance than ZM-3 and ZM-4 magnesium alloys, but also has high Excellent room temperature mechanical properties and moderate plasticity. At present, the most widely used Mg-RE magnesium alloy in my country's industrial field is ZM-6 magnesium alloy. [0003] In "National Standard Casting Magnesium Alloy of the People's Republic of China" (GB1177), the chemical composition of ZM-6 casting ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/06C22C1/03C22C1/06
Inventor 杨光昱李杰华介万奇于忠张润强
Owner NORTHWESTERN POLYTECHNICAL UNIV
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