Method for rolling high-ductility and high-scalability Mg-Al series magnesium alloy plates

A ductile, magnesium alloy technology, applied in metal rolling, temperature control, roll speed control, etc., can solve the problems of high temperature, increased production cost of plastic magnesium alloy sheet, long time, etc., to achieve production cost reduction, plasticity and Improvement of ductility, enhancement of tissue recovery and recrystallization ability

Inactive Publication Date: 2015-01-07
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the annealing process often has a high temperature and a long time, which greatly increases the production cost of plastic magnesium alloy sheets.

Method used

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  • Method for rolling high-ductility and high-scalability Mg-Al series magnesium alloy plates
  • Method for rolling high-ductility and high-scalability Mg-Al series magnesium alloy plates
  • Method for rolling high-ductility and high-scalability Mg-Al series magnesium alloy plates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The plate used in this example is a hot-rolled AZ31 magnesium alloy plate, and the specific composition is: Al: 2.96wt.%, Zn: 0.94wt.%, and the balance is Mg. The width of the sheet is 50mm, the thickness is 5mm, and the length is 100mm. The rolling method is as follows:

[0024] (1) Put the board into a resistance furnace and heat it to 525°C, and keep it warm for 10 minutes;

[0025] (2) Heat the surface of the roll to 300°C and keep it warm for 5 minutes;

[0026] (3) Start rolling: roll diameter 0.13m, roll speed 30r / min, rolling speed 12.2m / min, single pass reduction is 60%, rolling one pass to obtain a plate with a thickness of 2mm;

[0027] (4) Air cooling after rolling.

[0028] The microstructure of the plate after rolling can be seen in figure 1 ,from figure 1 It can be seen that the grains of the magnesium alloy high-speed rolled plate are relatively uniform and the grain size is relatively small. The main cause of grain refinement is the occurrence of ...

Embodiment 2

[0031] The plate used in this example is a hot-rolled AZ31 magnesium alloy plate, and the specific composition is: Al: 2.96wt.%, Zn: 0.94wt.%, and the balance is Mg. The sheet width is 90mm, the thickness is 6mm, and the length is 200mm. The rolling method is as follows:

[0032] (1) Put the plate into a resistance furnace and heat it to 350°C, and keep it warm for 30 minutes;

[0033] (2) Heating the surface of the roll to 350°C and keeping it warm for 10 minutes;

[0034] (3) Start rolling: the roll diameter is 0.3m, the roll speed is 30r / min, the rolling speed is 28.3m / min, and the reduction in a single pass is 60%. ℃, the holding time is 10min, and the plate with a thickness of 1mm is obtained after two passes of 60% reduction rolling;

[0035] (4) Air cooling after rolling.

[0036] The microstructure of the plate after rolling can be seen in figure 2 , figure 2 The degree of material grain refinement relative to figure 1 It is more obvious, indicating that the r...

Embodiment 3

[0039] The plate used in this example is an AZ80 magnesium alloy hot-extruded plate, and the specific composition is: Al: 7.94wt.%, Zn: 0.46wt.%, and the balance is Mg. The sheet width is 55mm, the thickness is 3mm, and the length is 80mm. The rolling method is as follows:

[0040] (1) Put the board into a resistance furnace and heat it to 475°C, and keep it warm for 15 minutes;

[0041] (2) Heating the surface of the roll to 330°C and keeping it warm for 7 minutes;

[0042] (3) Start rolling: roll diameter 0.13m, roll speed 30r / min, rolling speed 12.2m / min, single pass reduction is 70%, rolling one pass to obtain a plate with a thickness of 0.9mm;

[0043] (4) Air cooling after rolling.

[0044] The microstructure of the plate after rolling can be seen in image 3 After high-speed and large-deformation rolling, the material partially recrystallizes. Since the increase of Al element inhibits the recrystallization growth, the recrystallization grain size is controlled at <2...

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Abstract

The invention relates to a magnesium alloy processing method, in particular to a method for rolling high-ductility and high-scalability Mg-Al series magnesium alloy plates. The method comprises the steps of milling, heating and heat preservation of a plate, heating and heat preservation of a roller, rolling and cooling, wherein the rolling speed is 10-100 m/min; the rolling reduction of each time of rolling is 45%-80%. As the high-speed single-pass big-dependent-variable rolling is adopted for inducing obvious dynamic recrystallization, fully fine equiaxed grains are generated, and accordingly, the magnesium alloy plates of which the ductility and the scalability are greatly improved are acquired. Besides, as the annealing process is omitted, the manufacturing cost is greatly lowered, and the method is more suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a magnesium alloy processing method, in particular to a rolling method of a high plasticity and high ductility Mg-Al series magnesium alloy plate. Background technique [0002] In recent years, the demand for magnesium alloys in the fields of aviation, aerospace, automobiles, 3C products, and military industry has continued to grow, and the requirements for their mechanical properties have also gradually increased. Traditional cast magnesium alloys have gradually been unable to meet the demand. Wrought magnesium alloy is a magnesium alloy product produced by casting magnesium alloy through extrusion, rolling, forging and other plastic processing processes. It has excellent mechanical properties and corrosion resistance, but due to plastic processing, its cost is much higher than Cast magnesium alloy. [0003] Mg-Al series magnesium alloy is a magnesium alloy system that is currently commercially developed and researched in Chi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/22B21B37/74B21B37/46B21B37/48
CPCB21B1/22B21B3/00B21B37/46B21B37/48B21B37/74B21B2001/225
Inventor 张丁非郭非杨绪盛蒋璐瑶赵丁藏胡光山董于凤余大亮潘复生
Owner CHONGQING UNIV
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