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Wrought magnesium alloy with nanostructure characteristics and preparation method thereof

A technology for deforming magnesium alloys and magnesium alloys, applied in the field of metal materials and metallurgy, can solve the problems of low strength and poor plasticity of AZ series magnesium alloys, and achieve the effects of improving stability, small vehicle sales and smooth surface quality

Active Publication Date: 2019-01-25
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of low strength and poor plasticity of AZ series magnesium alloys, the invention provides a deformed magnesium alloy with nanostructure characteristics and a preparation method thereof

Method used

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  • Wrought magnesium alloy with nanostructure characteristics and preparation method thereof
  • Wrought magnesium alloy with nanostructure characteristics and preparation method thereof
  • Wrought magnesium alloy with nanostructure characteristics and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The composition of the deformed magnesium alloy is Al: 0.8%, Zn: 2.5%, Ca: 0.15%, Mn: 0.2%, Gd: 0.3%, Mg is the balance, and the impurity Fe content is controlled below 0.003%.

[0037] (1) Under the protection of No. 5 flux, the resistance melting furnace is used to smelt the raw materials according to the mass percentage of the deformed magnesium alloy. The Mg ingot is heated to 720°C to melt, and the Al ingot and Zn ingot are added to the melted magnesium liquid. Refining with flux for 20 minutes, when the temperature rises to 730°C, add Mg-25%Gd master alloy and stir evenly to obtain Mg-Al-Zn-Gd melt;

[0038] (2) Cooling and iron removal treatment: Mg-Al-Zn-Gd melt is cooled to 660°C and MnCl is added 2 Perform double iron removal to ensure that the Fe content in the magnesium alloy is less than 0.003%;

[0039](3) Add Mg-30%Ca master alloy when the melt temperature rises to 705°C after iron removal, carry out secondary refining for 10min, and the actual yield of ...

Embodiment 2

[0046] The composition of the deformed magnesium alloy is Al: 0.9%, Zn: 2.2%, Ca: 0.2%, Mn: 0.2%, Gd: 0.2%, Mg is the balance, and the impurity Fe content is controlled below 0.003%.

[0047] (1) Under the protection of No. 5 flux, the electric resistance melting furnace is used to smelt the raw materials according to the mass percentage of the deformed magnesium alloy, and the magnesium ingot is heated to 720°C to melt. According to the mass percentage of the deformed magnesium alloy, Al ingots and Zn ingots are added to the already In the molten magnesium liquid, refine with No. 5 flux for 20 minutes, when the temperature rises to 730°C, add Mg-25%Gd master alloy, stir evenly, and obtain Mg-Al-Zn-Gd melt;

[0048] (2) Low-temperature iron removal treatment: cool down the Mg-Al-Zn-Gd melt to 660°C and add MnCl 2 Perform double iron removal to ensure that the Fe content in the magnesium alloy is less than 0.003%;

[0049] (3) Add Mg-30%Ca master alloy when the melt temperatur...

Embodiment 3

[0056] The composition of the deformed magnesium alloy is Al: 1.2%, Zn: 1.9%, Ca: 0.3%, Mn: 0.3%, Gd: 0.2%, Mg is the balance, and the impurity Fe content is controlled below 0.003%.

[0057] (1) Under the protection of No. 5 flux, the electric resistance melting furnace is used to smelt the raw materials according to the mass percentage of the deformed magnesium alloy, and the magnesium ingot is heated to 720°C to melt. According to the mass percentage of the deformed magnesium alloy, Al ingots and Zn ingots are added to the already In the molten magnesium liquid, refine with No. 5 flux for 20 minutes, when the temperature rises to 730 ° C, add Mg-25% Gd master alloy, stir evenly, and obtain Mg-Al-Zn-Gd melt;

[0058] (2) Low-temperature iron removal treatment: cool the Mg-Al-Zn-Gd melt obtained in step (1) to 660°C and add MnCl 2 Double iron removal, Fe content in magnesium alloy is less than 0.003%;

[0059] (3) Add Mg-30%Ca master alloy when the melt temperature rises to ...

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Abstract

The invention provides a wrought magnesium alloy with nanostructure characteristics and a preparation method thereof. The alloy is prepared from, by mass, 0.8-1.5% of aluminum, 1.5-2.5% of zinc, 0.15-0.4% of calcium, 0.2-0.4% of manganese, 0.15-0.3% of gadolinium, and balance magnesium, wherein the content of impurity iron is controlled at 0.003% or less. The preparation method comprises the stepsthat 1, raw materials of an Mg ingot, an Al ingot, a Zn ingot, Mg-Ca and Mg-Gd intermediate alloy are smelted; 2, MnCl2 is added at lower temperature to remove iron; 3, secondary refining time afterMg-Ca is added is shortened, and the actual yield of Ca reaches 50-60%; 4, electromagnetic semi-continuous casting is carried out; 5, uniform treatment is carried out; 6, extrusion treatment is carried out to obtain a wrought magnesium alloy extruded bar. The wrought magnesium alloy with the nanostructure characteristics and the preparation method thereof have the advantages that a wrought magnesium alloy ingot blank is prepared by adopting a low-frequency electromagnetic semi-continuous casting technology, low-temperature extrusion can be achieved, the extruded material is in a nanometer complete recrystallized structure, and the mechanical properties at room temperature are excellent.

Description

technical field [0001] The invention belongs to the technical field of metal materials and metallurgy, and in particular relates to a deformed magnesium alloy with nanostructure characteristics and a preparation method thereof. Background technique [0002] Magnesium alloy has the advantages of low density, high specific strength, vibration damping, electromagnetic shielding, excellent machinability and easy recycling, and is an ideal material for lightweight structures. In recent years, with the increasing demand for magnesium alloys in the fields of aerospace, 3C electronic products and military industry, the mechanical properties of cast magnesium alloys can no longer meet people's needs. After being deformed by extrusion, rolling, forging and other plastic processing methods, The comprehensive mechanical properties of magnesium alloys have been improved to better meet the requirements for use as structural materials. However, due to the hexagonal close-packed structure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/04C22C1/03C22F1/06
CPCC22C1/03C22C23/04C22F1/06
Inventor 乐启炽牛燕霞宋泽天宁方坤廖启宇宝磊
Owner NORTHEASTERN UNIV
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