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A kind of processing method of strengthening magnesium alloy

A processing method and magnesium alloy technology, applied in the field of magnesium alloy processing, can solve the problems of changing the mechanical properties and formability of magnesium alloys, reducing the temperature of magnesium alloy sheets, and losing heat, so as to facilitate recovery and recrystallization and improve the structure status, effect of avoiding defects

Active Publication Date: 2021-02-02
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the rolling and deformation process of magnesium alloys, due to the directional flow and rotation of grains, the preferred orientation will occur, which makes the plate have a strong texture tendency and anisotropy, which limits and restricts the plasticity of magnesium alloys, and at the same time, the rolling deformation A lot of heat will be lost during the process, the temperature of the magnesium alloy sheet will drop, and the plasticity will be poor, which will lead to difficulty in subsequent deformation. When the magnesium alloy sheet is rolled, problems such as cracks and edge cracks may occur. The V-shaped bending and continuous bending process can make the magnesium alloy Uniformly refining grains and weakening texture is an effective method to change the mechanical properties and formability of magnesium alloys

Method used

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  • A kind of processing method of strengthening magnesium alloy
  • A kind of processing method of strengthening magnesium alloy
  • A kind of processing method of strengthening magnesium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Processing a magnesium alloy billet whose size is 1000mm×50mm×0.5mm includes the following steps:

[0031] (1) Homogenization heat treatment of the magnesium alloy billet: put the magnesium alloy billet 1 into a heat treatment furnace, keep it at 450°C for 12h, then take it out and put it into pure water at 25°C for water cooling to room temperature.

[0032] (2) Surface treatment of the magnesium alloy billet: use sandpaper to remove the scale on the surface of the magnesium alloy billet 1, then clean it with an ultrasonic cleaner and anhydrous ethanol, and dry it with a hair dryer to prevent impurities on the surface of the magnesium alloy billet 1.

[0033] (3) Magnesium alloy billet preheating: put the magnesium alloy billet obtained in step 2) into a vacuum muffle furnace, heat up to 300° C., and keep the temperature for 40 minutes, so that the interior of the magnesium alloy billet 1 is evenly heated.

[0034] (4) Hot rolling: the uniformly heated magnesium alloy ...

Embodiment 2

[0041] Processing a magnesium alloy blank 1 with a size of 3000mm×40mm×1mm includes the following steps:

[0042] (1) Homogenization heat treatment of the magnesium alloy billet: put the magnesium alloy billet 1 into a heat treatment furnace, keep it warm at 400°C for 15h, then take it out and put it into pure water at 25°C for water cooling to room temperature.

[0043](2) Surface treatment of the magnesium alloy billet: use sandpaper to remove the scale on the surface of the magnesium alloy billet 1, then clean it with an ultrasonic cleaner and anhydrous ethanol, and dry it with a hair dryer to prevent impurities on the surface of the magnesium alloy billet 1.

[0044] (3) Magnesium alloy billet preheating: put the material obtained in step (2) into a vacuum muffle furnace, heat up to 400° C., and keep the temperature for 30 minutes, so that the interior of the magnesium alloy billet 1 is evenly heated.

[0045] (4) Hot rolling: quickly place the evenly heated magnesium allo...

Embodiment 3

[0052] Processing a magnesium alloy blank 1 with a size of 5000mm×20mm×2mm includes the following steps:

[0053] (1) Homogenization heat treatment of the magnesium alloy billet: put the magnesium alloy billet 1 into a heat treatment furnace, keep it at 380°C for 20 hours, then take it out and put it into pure water at 25°C for water cooling to room temperature.

[0054] (2) Surface treatment of the magnesium alloy billet: use sandpaper to remove the scale on the surface of the magnesium alloy billet 1, then clean it with an ultrasonic cleaner and anhydrous ethanol, and dry it with a hair dryer to prevent impurities on the surface of the magnesium alloy billet 1.

[0055] (3) Magnesium alloy billet preheating: put the material obtained in step (2) into a vacuum muffle furnace, heat up to 450° C., and keep the temperature for 20 minutes, so that the interior of the magnesium alloy billet 1 is evenly heated.

[0056] (4) Hot rolling: the uniformly heated magnesium alloy billet 1...

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Abstract

The invention discloses a processing method of a reinforced magnesium alloy. The processing method comprises the following steps of (1) putting a magnesium alloy blank into a heat treatment furnace for homogenization treatment; (2) removing an oxide layer on the surface of the magnesium alloy blank, cleaning the magnesium alloy blank and carrying out drying treatment; (3) heating the magnesium alloy blank obtained in the step (2) to 300-450 DEG C for 20-40 minutes; (4) hot rolling the magnesium alloy blank; (5) making a pulse power supply to form a closed loop through two conductive wheels contacting a magnesium alloy plate by adjusting a device, adjusting the center distance between two rollers, and controlling the bending deformation angle of the magnesium alloy plate; (6) carrying out pulse current auxiliary multi-time roller bending deformation on the hot-rolled magnesium alloy plate; (7) turning off a rolling mill and the a pulse power supply; and (8) cooling the deformed magnesium alloy plate. By means of the processing method of the reinforced magnesium alloy, the process is simple, the operation is convenient, the grain can be uniformly refined, the texture can be weakened,and the comprehensive mechanical property of the magnesium alloy is improved.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy processing, and in particular relates to a processing method for strengthening magnesium alloys. Background technique [0002] Magnesium alloy has the characteristics of low density, high specific strength and specific stiffness, making it the material of choice for weight reduction, energy saving and environmental protection, and has broad application prospects in electronics, communications, transportation, aerospace and other fields. However, the close-packed hexagonal crystal structure of magnesium alloy can only provide four slip systems, which cannot meet the requirement of five independent slip systems required by the Von-Mises criterion. Therefore, the plastic deformation ability of magnesium alloy is poor. Traditional cast magnesium alloys have gradually failed to meet the requirements, and wrought magnesium alloy products produced by extrusion, forging, rolling and other process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/06C22F1/02C22F3/00
Inventor 卢立伟项瑶李志高蔡志华吴志强马旻刘龙飞
Owner HUNAN UNIV OF SCI & TECH
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