Wrought magnesium alloy and preparation method thereof

A technology for deforming magnesium alloys and raw materials, applied in the field of alloy materials, can solve the problems that mechanical properties cannot meet industrial requirements, limit the application of magnesium alloys, and high alloy costs, achieve significant aging strengthening, improve structure and morphology, and achieve good economic benefits. Effect

Active Publication Date: 2017-09-26
山东山科智镁新材料科技有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] However, magnesium alloys have a typical close-packed hexagonal structure, and there is only a single basal slip system when deformed at room temperature, which limits the application of magnesium alloys.
At present, the most widely used wrought magnesium alloys are mainly AZ, ZK, AM and Mg-RE series. Most high-strength magnesium alloys contain zirconium or rare earth elements, but the existence of precious metal Zr or rare earth elements makes the alloy cost higher, which limits the Application: Zirconium-free magnesium alloys, although cheap, have low strength and mechanical properties that do not meet industrial needs

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  • Wrought magnesium alloy and preparation method thereof
  • Wrought magnesium alloy and preparation method thereof
  • Wrought magnesium alloy and preparation method thereof

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preparation example Construction

[0029] A method for preparing a deformed magnesium alloy provided in an embodiment of the present invention includes:

[0030] Preheating pure magnesium, pure zinc and Mg-Mn master alloy under the condition of 150-220°C for 20-30 minutes, preheating pure bismuth under the condition of 100-150°C for 20-30 minutes.

[0031] The chemical properties of magnesium alloy are relatively active. When it starts to melt, it is easy to oxidize and burn. It is necessary to take protective measures to prevent the oxidation of the molten metal surface. Heat pure magnesium in a resistance furnace with protective gas, and keep it warm at 700-720°C to melt all the pure magnesium. In the embodiment of the present invention, the shielding gas contains SF 6 of mixed gas. Contains SF 6 The mixed gas and magnesium can react to generate MgF 2 . MgF 2 The density is high, and together with MgO, it can form a continuous and dense oxide film, which has a good protective effect on the melt. Prefer...

Embodiment 1

[0037] This embodiment provides a kind of wrought magnesium alloy, by weight percentage, comprising:

[0038] 4.0% Zinc, 2.0% Bismuth, 0.5% Manganese, the remainder being Magnesium and unavoidable impurities.

[0039] It is mainly made by the following methods:

[0040] Preheat pure magnesium, pure zinc, Mg-10wt%Mn master alloy at 150°C for 30 minutes, and pure bismuth at 100°C for 30 minutes.

[0041] In pass there is CO 2 and SF 6 The pure magnesium is heated in a resistance furnace protected by a mixed gas, and the pure magnesium is completely melted at 700°C. After the pure magnesium is completely melted, add the preheated pure zinc, pure bismuth and Mg-10wt%Mn master alloy, heat up to 730° C. and keep it warm for 30 minutes. After the alloying elements are completely melted, stir fully to disperse the raw materials evenly, then keep the temperature for 20 minutes and then cool down to 690°C. 6Cast into ingots under the protection of a mixed gas. Among them, by volum...

Embodiment 2

[0045] This embodiment provides a kind of wrought magnesium alloy, by weight percentage, comprising:

[0046] 4.0% Zinc, 2.0% Bismuth, 0.5% Manganese, the remainder being Magnesium and unavoidable impurities.

[0047] It is mainly made by the following methods:

[0048] Preheat pure magnesium, pure zinc, Mg-10wt%Mn master alloy at 160°C for 25 minutes, and pure bismuth at 120°C for 25 minutes.

[0049] In pass there is CO 2 and SF 6 The pure magnesium is heated in a resistance furnace protected by a mixed gas, and the pure magnesium is completely melted at 720°C. After all the pure magnesium is melted, add the preheated pure zinc, pure bismuth and Mg-10wt%Mn master alloy, raise the temperature to 740° C. and keep the temperature for 25 minutes. After the alloying elements are completely melted, stir fully to disperse the raw materials evenly, let it stand for 20 minutes and then cool down to 700°C. 6 Cast into ingots under the protection of a mixed gas. Among them, by vo...

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Abstract

The invention provides a wrought magnesium alloy and a preparation method thereof and relates to the technical field of alloy materials. The wrought magnesium alloy is prepared from raw materials, by weight percent, 4.0%-8.0% of zinc, 1.0%-6.0% of bismuth, 0.2%-1.0% of magnesium and the balance magnesium and unavoidable impurities. The wrought magnesium alloy has the characteristics of high strength and high plasticity and excellent mechanical performance, does not contain precious metal, is low in cost and has relatively-good economic benefits. The preparation method of the wrought magnesium alloy comprises the steps that in protection of mixed gas containing SF6, preheated magnesium is heated to be molten, preheated zinc, bismuth and magnesium are added, the temperature is raised, and after the raw materials are molten, the raw materials are cast into an ingot; and the ingot is subjected to extrusion processing and heat treatment. The method is simple in preparation process, high in controllability, low in preparation cost and suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of alloy materials, and in particular to a deformed magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium alloy is an alloy composed of magnesium and other elements. Its characteristics are: low density, high specific strength, large specific elastic modulus, good heat dissipation, good shock absorption, greater impact load capacity than aluminum alloy, and good corrosion resistance to organic matter and alkali. Since magnesium alloy has the advantages of light weight, shock absorption, good electromagnetic shielding performance, and good machinability, it has important application value and broad application prospects in aerospace, electronic products, automobiles and other industries. [0003] However, magnesium alloys have a typical hexagonal close-packed structure, and there is only a single basal slip system when deformed at room temperature, resulting in poor deform...

Claims

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Application Information

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IPC IPC(8): C22C23/04C22C23/00C22C1/03C22F1/06
CPCC22C1/03C22C23/00C22C23/04C22F1/06
Inventor 周吉学马百常王金伟吴建华林涛唐守秋杨院生
Owner 山东山科智镁新材料科技有限公司
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