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High-performance wrought magnesium alloy material

A technology for deformed magnesium alloys and alloy materials, applied in the field of deformed magnesium alloys, can solve the problems of reducing the deformation ability of magnesium alloy materials and limiting the potential of materials, so as to promote dynamic recrystallization, simplify the process, and improve yield strength and tensile strength Effect

Inactive Publication Date: 2010-08-11
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Impurity elements in magnesium alloys, especially harmful elements not only limit the material potential, but also greatly reduce the deformation ability of magnesium alloy materials

Method used

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  • High-performance wrought magnesium alloy material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of High Purity Wrought Magnesium Alloy A by Semi-continuous Casting Technology and Hot Extrusion Technology

[0026] The wrought magnesium alloy A can be produced by the following preparation process:

[0027] (1) The raw materials are magnesium ingots (purity is 99.97%), industrial pure zinc and Mg-28% Zr master alloy. Add pure magnesium into the resistance crucible furnace, heat and melt, heat up to 350-400°C, and keep it warm for 20 minutes; add No. 5 flux for protection, and then adjust the temperature to 880°C to promote the melting of magnesium. (2) Remove slag at 720°C to 730°C after melting the magnesium ingot, add No. Flux coverage. (3) Raise the temperature to about 760°C, add the magnesium-zirconium master alloy, and stir for 2 to 5 minutes after it is completely melted to homogenize the alloy components. (4) Add No. 5 flux and refine for 3-5 minutes, then remove slag, sprinkle No. 5 flux on the surface to cover and protect, and let it stand at...

Embodiment 2

[0031] Preparation of High Purity Wrought Magnesium Alloy B by Semi-continuous Casting Technology and Hot Extrusion Technology

[0032] The only difference from Example 1 lies in the resting time of the melt in the step (4) of the preparation process, and the resting time of this alloy B is 45 minutes.

[0033] The analysis of the as-cast chemical composition of magnesium alloys A and B in Examples 1 and 2 of the present invention is shown in Table 2. For the convenience of comparison, the chemical composition of the typical ZK60 magnesium alloy required by the national standard is also given in the table.

[0034] Table 2 Chemical Composition of Magnesium Alloys

[0035] alloy

Si

Fe

Cu

mn

be

Ni

Zn

Zr

Mg

A

0.0032

0.0020

0.00061

0.0039

0.00034

＜0.0005

6.37

0.53

Bal.

B

0.0020

0.0013

0.00045

0.0034

0.00011

＜0.0005

6.21

0.53

Bal.

...

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Abstract

The invention relates to a high-purity high-performance magnesium alloy material, which consists of the following components in percentage by mass: 6.2 to 6.4 percent of Zn, 0.5 to 0.6 percent of Zr, 0.007 to 0.011 percent of inevitable Fe, Si, Cu, Ni and other impurities, and the balance magnesium. The material is prepared by the following steps: selecting raw magnesium with higher purity as a raw material; melting the raw magnesium by using the semicontinuous casting technology; properly increasing the melt standing time to ensure that compound particles containing Fe, Si and other impurity elements can be sufficiently deposited and a high-purity alloy cast blank can be prepared; and preparing the Mg-Zn-Zr wrought magnesium alloy by adopting the conventional extruding technology. The wrought magnesium alloy can maintain the high strength of traditional commercial ZK60 magnesium alloy to ensure that the plasticity and forming performance of the alloy can be greatly improved and the application potential of the material is sufficiently developed. Furthermore, the technical equipment used in the invention is conventional universal equipment, and the preparation process is simple.

Description

technical field [0001] The invention relates to deformed magnesium alloys, in particular to a high-purity, high-performance deformed magnesium alloy material and a preparation method. Background technique [0002] Magnesium alloys have the advantages of low density, high specific strength and specific stiffness, strong damping, vibration and noise reduction capabilities, excellent electromagnetic shielding performance, excellent liquid forming performance, excellent casting and cutting performance, rich resources, and can be recycled. People attach great importance to it, and it is known as "21st century green engineering material". And the third largest metal material after aluminum alloy. [0003] However, since the crystal structure of magnesium alloy is a close-packed hexagonal structure, the most common slip systems are the basal plane slip system and the facet slip system of the α Burgers vector, and there are few independent slip systems, resulting in low room temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/04C22C1/03C22F1/06
Inventor 潘复生陈先华彭建毛建军王敬丰汤爱涛
Owner CHONGQING UNIV
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