Controlled rolling preparation method for multicomponent and multi-scale-structure magnesium alloy with high aluminum content

A controlled rolling, multi-scale technology, applied in the field of metal materials, can solve the problems of difficulty in scale and production, reduce production costs, and high equipment requirements, and achieve the effect of easy promotion, simple method, and improved plastic deformation ability.

Inactive Publication Date: 2017-11-07
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the large deformation technology commonly used in the preparation of high-strength magnesium alloys requires high equipment and the size of the processed samples is small, and it is difficult to achieve the scale and production required for commercial applications.
Magnesium-aluminum alloys with high aluminum content are prone to cracking in the traditional rolling process, and multi-pass rolling with small reduction is not conducive to reducing production costs due to the large number of passes and complicated processes

Method used

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  • Controlled rolling preparation method for multicomponent and multi-scale-structure magnesium alloy with high aluminum content
  • Controlled rolling preparation method for multicomponent and multi-scale-structure magnesium alloy with high aluminum content
  • Controlled rolling preparation method for multicomponent and multi-scale-structure magnesium alloy with high aluminum content

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Experimental program
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Effect test

Embodiment 1

[0020] The controlled rolling preparation method of the multi-element multi-scale structure high aluminum content magnesium alloy in this embodiment, the specific steps are as follows:

[0021] (1) Smelting and extrusion: put pure aluminum, pure tin ingots and pure magnesium ingots with a mass fraction of 8.17% and 1.95% into the melting furnace, under the protection of sulfur powder and sulfur hexafluoride and other protective gases, After impurity removal, refining and other processes, it is cast into an ingot at 660-700°C, and the ingot of the obtained components is extruded at 250-300°C to obtain an extruded plate.

[0022] (2) Homogenization treatment: heat the extruded sheet at 400-430°C for 4-20 hours, so that the second phase at the grain boundary can be fully re-dissolved, so as to prevent the extruded sheet from occurring during single-pass rolling with large reduction. cracking.

[0023] (3) Single-pass large-reduction controlled rolling: put the homogenized extrud...

Embodiment 2

[0026] The controlled rolling preparation method of the multi-element multi-scale structure high aluminum content magnesium alloy in this embodiment, the specific steps are as follows:

[0027] (1) Smelting and extrusion: Put pure aluminum, pure tin, pure zinc ingots and pure magnesium ingots with mass fractions of 8.16%, 1.89% and 0.22% into the melting furnace, add sulfur powder and sulfur hexafluoride, etc. Under the protection of protective gas, it is cast into ingot at 660-690°C after impurity removal and refining, and the ingot of the obtained components is extruded at 250-300°C to obtain extruded plate.

[0028] (2) Homogeneous treatment: heat the obtained extruded sheet at 400-430°C for 4-20 hours, so that the second phase at the grain boundary can be fully redissolved, laying a solid foundation for the uneven deformation of the extruded sheet during the rolling process. Structural basis.

[0029] (3) Single-pass high-reduction controlled rolling: Put the homogenized ...

Embodiment 3

[0032] The controlled rolling preparation method of the multi-element multi-scale structure high aluminum content magnesium alloy in this embodiment, the specific steps are as follows:

[0033] (1) Smelting and extrusion: put pure aluminum, pure tin, pure zinc ingots and pure magnesium ingots with mass fractions of 8.19%, 1.89% and 0.56% into the smelting furnace, add sulfur powder and sulfur hexafluoride, etc. Under the protection of protective gas, it is cast into ingot at 670-690°C after impurity removal and refining, and the ingot of the obtained components is extruded at 250-300°C to obtain extruded plate.

[0034] (2) Homogeneous treatment: keep the extruded sheet at 400-430°C for 4-20 hours to fully dissolve the second phase at the grain boundary, and lay a structural foundation for the uneven deformation of the extruded sheet during the rolling process .

[0035] (3) Single-pass large-reduction controlled rolling: put the homogenized extruded plate into an incubator a...

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Abstract

The invention relates to a controlled rolling preparation method of a multi-element multi-scale structure high aluminum content magnesium alloy. The preparation method comprises four steps of smelting extrusion, homogenization treatment, controlled rolling and controlled recrystallization; the prepared magnesium alloy structure It has a multivariate and multi-scale grain distribution, consisting of ultra-fine grains with an average size of less than 1 micron, fine grains with a size of 1-10 microns, large grains with a size greater than 70 microns, and a uniformly dispersed second phase; prepared by this method The magnesium alloy room temperature plasticity is greater than 20%, and the strength is higher than 330MPa. The invention provides a controlled rolling preparation method of multi-element and multi-scale structure high-aluminum content magnesium alloy with simple and reliable process, which is easy to mass-produce and popularize and apply. ), fine grains (1-10 microns) and coarse grains (-70 microns) are uniformly mixed, and this organizational structure ensures that the magnesium alloy has good plasticity at room temperature while having high strength.

Description

technical field [0001] The invention relates to a controlled rolling preparation method of a magnesium alloy with a multi-element and multi-scale structure and high aluminum content, belonging to the technical field of metal materials. Background technique [0002] As the lightest metal material for engineering structures, magnesium alloy has many excellent properties, such as high specific strength, high specific elastic modulus, good heat dissipation, good shock absorption performance, can withstand high impact loads, and is more resistant to organic matter than other alloys It is widely used in aviation, aerospace, transportation, chemical industry, rocket and other fields. With the transformation and upgrading of China's automobile industry and 3C industries and the significant improvement of China's economic status, my country's demand for magnesium alloys is increasing. However, magnesium has a close-packed six-row structure, with few slip systems and poor plastic defo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02C22C1/02C22F1/06C22F1/18C22F1/04
CPCC22C23/02C22C1/02C22F1/04C22F1/06C22F1/183
Inventor 查敏余志远王慧远姜启川王珵杨治政王金国
Owner JILIN UNIV
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