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Preparation method of low-anisotropy high-plasticity magnesium alloy

An anisotropic, magnesium alloy technology, applied in the field of magnesium alloy material manufacturing, can solve the problems of high technical difficulty, complex process, multi-directional forging, etc., and achieve the effect of simple processing technology operation, simple equipment, and weakening anisotropy

Active Publication Date: 2022-03-22
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the present invention is: how to provide a method for preparing a low-anisotropy high-plasticity magnesium alloy, which solves the complex process of the existing method and requires multi-directional forging, which is technically difficult advanced questions

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  • Preparation method of low-anisotropy high-plasticity magnesium alloy
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Examples

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Effect test

Embodiment 1

[0028] 1) Select a magnesium alloy ingot Mg-1%wtZn-0.3%wtCe ternary alloy, homogenize it at 480° C. for 18 hours, and air-cool to room temperature to obtain a magnesium alloy billet.

[0029] 2) Preheat the homogenized magnesium alloy billet to 450-460°C, then put it into the extrusion barrel and carry out hot extrusion in the extrusion machine, the extrusion temperature is 450°C, the extrusion ratio is 30:1, and the extrusion The blank after pressing is 56mm wide and 3mm thick.

[0030] 3) The extruded billet is cold-rolled one pass along the extrusion direction, with a reduction of 5% per pass, and then annealed. The annealing temperature is 350°C and the annealing time is 1h, which is the low anisotropy and high plastic magnesium alloy.

[0031] Its ultimate tensile strength at room temperature along RD (rolling direction) of the magnesium alloy obtained in the present embodiment is 239MPa, and the elongation after stretching is 32.6%, and the ultimate tensile strength at ...

Embodiment 2

[0033] 1) Select a magnesium alloy ingot Mg-1%wtZn-0.3%wtCe ternary alloy, homogenize it at 480° C. for 18 hours, and air-cool to room temperature to obtain a magnesium alloy billet.

[0034] 2) Preheat the homogenized magnesium alloy billet to 450-460°C, then put it into the extrusion barrel and perform hot extrusion in the extrusion machine, the extrusion temperature is 450°C, the extrusion ratio is 30:1, and the extrusion The blank after pressing is 56mm wide and 3mm thick.

[0035] 3) The extruded billet is cold-rolled one pass along the extrusion direction, with a reduction of 8% per pass, and then annealed. The annealing temperature is 350°C and the annealing time is 1h, which is the low anisotropy and high plastic magnesium alloy.

[0036] Its ultimate tensile strength at room temperature along RD (rolling direction) of the magnesium alloy gained in the present embodiment is 233MPa, and the elongation after stretching is 42.2%, and the ultimate tensile strength at room...

Embodiment 3

[0038] 1) Select a magnesium alloy ingot Mg-1%wtZn-0.3%wtCe ternary alloy, homogenize it at 480° C. for 18 hours, and air-cool to room temperature to obtain a magnesium alloy billet.

[0039] 2) Preheat the homogenized magnesium alloy billet to 450-460°C, then put it into the extrusion barrel and carry out hot extrusion in the extrusion machine, the extrusion temperature is 450°C, the extrusion ratio is 30:1, and the extrusion The blank after pressing is 56mm wide and 3mm thick.

[0040] 3) The extruded billet is cold-rolled one pass along the extrusion direction, with a reduction of 19% per pass, and then annealed. The annealing temperature is 350°C and the annealing time is 1h, which is the low anisotropy and high plastic magnesium alloy.

[0041] Its ultimate tensile strength at room temperature along RD (rolling direction) of the magnesium alloy gained in the present embodiment is 228MPa, and the elongation after stretching is 41.6%. The elongation after breaking was 45....

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Abstract

The invention discloses a preparation method of a low-anisotropy high-plasticity magnesium alloy, which comprises the following steps: sequentially carrying out homogenization, hot extrusion and one-pass cold rolling treatment along the extrusion direction on an Mg-Zn-Ce ternary alloy cast ingot to obtain the low-anisotropy high-plasticity magnesium alloy. Wherein the extrusion-state magnesium alloy blank shows a double-peak texture type, and the annealing-state magnesium alloy shows an annular texture type. Only one-pass cold rolling and one-time annealing are needed in the whole rolling forming process, the mechanical property anisotropy of the wrought magnesium alloy can be effectively weakened, the prepared high-plasticity magnesium alloy is excellent in performance, the plasticity in the rolling direction and the plasticity in the direction perpendicular to the rolling direction are high and basically kept consistent and reach 43%, the plasticity of the alloy is improved, and meanwhile the mechanical property of the wrought magnesium alloy is improved. And the anisotropy of the magnesium alloy can be effectively weakened, subsequent large deformation and cold machining are facilitated, the potential of the magnesium alloy serving as an engineering component material is greatly improved, and the engineering field where the magnesium alloy is possibly applied is expanded.

Description

technical field [0001] The invention relates to the field of magnesium alloy material manufacturing, in particular to a preparation method of a low-anisotropy high-plasticity magnesium alloy. Background technique [0002] Magnesium alloy, as a green light metal structural material in the 21st century, has made outstanding contributions to energy saving, emission reduction and environmental protection. Compared with cast magnesium alloy, wrought magnesium alloy has a wider range of application. However, due to the lower crystal symmetry of magnesium, It is easy to produce deformation texture during the deformation process, resulting in obvious plastic anisotropy, which limits its further deformation processing. Therefore, the preparation of high-ductility magnesium alloys with low anisotropy is of great strategic significance for promoting the large-scale application of wrought magnesium alloys. [0003] At present, there are a variety of processes to eliminate the anisotrop...

Claims

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Application Information

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IPC IPC(8): C22C23/04C22F1/06
CPCC22C23/04C22F1/06
Inventor 董志华钱晓英何超雷彬张昂白生文杨鸿蒋斌潘复生
Owner CHONGQING UNIV
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