CN100556566C - The forming method of magnesium alloy ultrathin sheet material - Google Patents
The forming method of magnesium alloy ultrathin sheet material Download PDFInfo
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- CN100556566C CN100556566C CNB2008100306651A CN200810030665A CN100556566C CN 100556566 C CN100556566 C CN 100556566C CN B2008100306651 A CNB2008100306651 A CN B2008100306651A CN 200810030665 A CN200810030665 A CN 200810030665A CN 100556566 C CN100556566 C CN 100556566C
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Abstract
A kind of magnesium alloy ultrathin sheet material forming method is incubated 22-25 hour with magnesium alloy ingot 648-688K under inert gas shielding earlier, the ingot blank homogenising handled, and directly hot extrude cogging again, hot extrude cogging total deformation reaches more than 40%, then annealing; Slab behind the hot rolling cogging is cut into required width dimensions, cross rolling under thermal process status, the hot rolling deformation amount is controlled between the 20-30% for the first time, vertically rolling after the intermediate annealing, under thermal process status, repeatedly carry out transverse rolling-axial rolling-transverse rolling-axial rolling more again, and be aided with intermediate annealing, sheet metal thickness is rolled to 1mm; The cold rolled sheet draught per pass is that the cold rolling total deformation between 5%, twice intermediate annealing is controlled at 30%, cold rolling back sheet metal thickness 0.1mm; At last to sheet material leveling and finishing.Sheet material crystal grain is tiny, even tissue, and defective is few, and basal plane texture weakens, and performance such as mechanics, corrosion-resistant and electrochemistry is improved.
Description
Technical field
The present invention relates to a kind of forming technique of magnesium alloy ultrathin sheet material, belong to sheet material processing and preparing technical field in the Materials Processing Engineering.
Background technology
Urgent day by day along with lightweight demands such as automobile, household electrical appliances, office system and earth environmental issue, the development and application of wrought magnesium alloy more and more receives publicity.Scholarly forecast will reach ten thousand tons of 15-20 in following 10-15 magnesium alloy plate market.China is the resource big country of magnesium, magnesium ore reserves the first in the world, and big producing country and big export country, continuous nine annual productions and export volume the first in the world, but be not the power of magnesium, because outlet is primary product, and deep processed products such as magnesium alloy plate are wanted import.At present, the minimum thickness of domestic production wide cut (＞500mm is wide) magnesium alloy plate only is 0.5mm, but some accurate field of electronics, high-power magnesium anode field of batteries and aerospace field need be applied to the ultra-thin magnesium alloy plate of thickness less than 0.5mm.
The difficulty of preparation magnesium alloy ultrathin sheet material is that magnesium belongs to the close-packed hexagonal crystal structure, plastic deformation ability is poor, common rolling mill practice can not prepare the magnesium alloy plate of the following thickness of 0.5mm, and common rolling product defects is many, crystal grain, crystal boundary, impurity, superfluous phase and defective are elongated significantly along the surface, produce the texture influence plate property, also can produce very big residual stress in the sheet material.--production of----magnesium alloy ultrathin sheet material is met the need of market, and magnesium alloy is advanced to the deep processing field by elementary processing now to be badly in need of a kind of novel moulding process solution magnesium alloy production and the bottleneck of expansion application.
Summary of the invention
The purpose of this invention is to provide a kind of preparation 0.1mm * 500mm * 500mm, the method for the magnesium alloy ultrathin sheet material of thickness deviation ± 0.01, this sheet material crystal grain is tiny, even tissue, defective is few, and basal plane texture weakens, and performance such as mechanics, corrosion-resistant and electrochemistry is improved.Specifically may further comprise the steps:
(1) homogenizing cast ingot
648-688K under inert gas shielding is incubated 22-25 hour with ingot casting, and the ingot blank homogenising is handled.
(2) ingot casting hot extrude cogging
The direct hot extrude cogging of ingot blank with the homogenising processing.Hot extrude cogging total deformation reaches more than 40%, makes as-cast structure change Deformation structure fully into, and annealing improves slab plasticity then.
(3) transverse rolling-axial rolling technology
After the slab that has Deformation structure behind the hot rolling cogging is cut into required width dimensions, cross rolling.The hot rolling deformation amount is controlled between the 20-30% for the first time, guarantees to be out of shape the cracking that reduces slab fully simultaneously, and is vertically rolling after the intermediate annealing.Repeatedly carry out transverse rolling-axial rolling-transverse rolling-axial rolling operation more then under thermal process status, and be aided with intermediate annealing elimination work hardening, even to guarantee the sheet material structural constituent, final sheet metal thickness is to 1mm.This technology key is the control of every time deflection and the variation of each passage rolling direction.
(4) ultra-thin plate cold-rolling process
Magnesium at room temperature be out of shape main dependence basal plane 0001}＜1120〉slippage and the conical surface 1012}＜1011〉twin.Twinly become important deformation mechanism very important in the deformation at room temperature, for guaranteeing that twinning deformation does not produce micro-flaw under the room temperature, the cold rolled sheet draught per pass is that the cold rolling total deformation between 5%, twice intermediate annealing is controlled at 30%.Cold rolling back sheet metal thickness 0.1mm.The key of this technology is the control of every time deflection.
(5) sheet material leveling and finishing
Ultra-thin sheet material after cold rolling is carried out leveling and finishing, and making the sheet material specification is 0.1mm * 500mm * 500mm, thickness deviation ± 0.01.
It is tiny that the ultra-thin magnesium alloy plate of 0.1mm * 500mm that the present invention makes * 500mm has crystal grain, even tissue, and defective is few, and basal plane texture weakens, and performance such as mechanics, corrosion-resistant and electrochemistry is improved.
Description of drawings
Fig. 1 is the moulding process flow chart of magnesium anode ultra-thin sheet material of the present invention;
Fig. 2 is the transverse rolling-axial rolling process schematic representation of magnesium anode ultra-thin sheet material of the present invention;
Fig. 3 is the microscopic structure of the magnesium anode ultra-thin sheet material of the present invention's preparation;
Fig. 4 prepares the magnesium anode ultra-thin sheet material of specification 0.1mm * 500mm * 500mm for the present invention.
Below in conjunction with drawings and Examples the present invention is described in further details:
The specific embodiment
Embodiment 1
The magnesium power cell anode sheet material of moulding process production of the present invention by homogenizing annealing, extrusion blooming, multi-pass laterally-vertically rolling, cold rolling, leveling and finishing form, the thickness of anode magnesium alloy sheet material can be chosen according to battery size, minimum thickness can reach 0.1mm, thickness deviation ± 0.01.
Ultra-thin magnesium alloy anode sheet material is finished by following implementation step on the basis that melts out the casting ingot blank.
(1) homogenizing cast ingot
648-688K under inert gas shielding is incubated 22-25 hour with ingot casting, and the ingot blank homogenising is handled.
(2) ingot casting hot extrude cogging
The direct hot extrude cogging of ingot blank with the homogenising processing.Hot extrude cogging total deformation reaches more than 40%, and reduction in pass about 15% makes as-cast structure change Deformation structure fully into, and high annealing improves slab plasticity then.
(3) transverse rolling-axial rolling technology
After the slab that has Deformation structure after the hot extrude cogging is cut into required width dimensions, cross rolling.The hot rolling deformation amount is controlled between the 20-30% for the first time, changes into vertically rolling after the intermediate annealing.Repeatedly carry out the transverse rolling of transverse rolling-axial rolling-again-axial rolling operation more then under thermal process status, and be aided with intermediate annealing, even to guarantee final sheet material structural constituent, thickness is to the 1mm.
(4) special cold rolled thin plate technology
The cold rolled sheet draught per pass is about 5%, and the cold rolling total deformation between twice intermediate annealing is controlled at about 30%.Cold rolling back sheet metal thickness 0.1mm.
(5) sheet material leveling and finishing
Ultra-thin sheet material after cold rolling is carried out leveling and finishing, and making the sheet material specification is 0.1mm * 500mm * 500mm, thickness deviation ± 0.01.
Claims (1)
1, a kind of magnesium alloy ultrathin sheet material forming method is characterized in that may further comprise the steps:
(1) homogenizing cast ingot
648-688K under inert gas shielding is incubated 22-25 hour with magnesium alloy ingot, and the ingot blank homogenising is handled;
(2) ingot casting hot extrude cogging
With the direct hot extrude cogging of ingot blank that homogenising is handled, hot extrude cogging total deformation reaches more than 40%, and annealing improves slab plasticity then;
(3) transverse rolling-axial rolling technology
The slab that has Deformation structure after the hot extrude cogging is cut into required width dimensions, cross rolling under thermal process status, the hot rolling deformation amount is controlled between the 20-30% for the first time, vertically rolling after the intermediate annealing, after this under thermal process status, repeatedly carry out transverse rolling-axial rolling-transverse rolling-axial rolling operation more again, and be aided with intermediate annealing, sheet metal thickness is rolled to 1mm;
(4) ultra-thin plate cold-rolling process
The cold rolled sheet draught per pass is that the cold rolling total deformation between 5%, twice intermediate annealing is controlled at 30%, cold rolling back sheet metal thickness 0.1mm;
(5) sheet material leveling and finishing
Ultra-thin sheet material after cold rolling is carried out leveling and finishing, and making the sheet material specification is 0.1mm * 500mm * 500mm, thickness deviation ± 0.01.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2008100306651A CN100556566C (en) | 2008-02-22 | 2008-02-22 | The forming method of magnesium alloy ultrathin sheet material |
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| CNB2008100306651A CN100556566C (en) | 2008-02-22 | 2008-02-22 | The forming method of magnesium alloy ultrathin sheet material |
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| CN101274332A CN101274332A (en) | 2008-10-01 |
| CN100556566C true CN100556566C (en) | 2009-11-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102814325A (en) * | 2012-08-22 | 2012-12-12 | 西安建筑科技大学 | Method for rolling large-sized fine grain magnesium alloy plate |
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| CN107159712A (en) * | 2017-03-27 | 2017-09-15 | 清华大学深圳研究生院 | A kind of magnesium alloy foil preparation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814325A (en) * | 2012-08-22 | 2012-12-12 | 西安建筑科技大学 | Method for rolling large-sized fine grain magnesium alloy plate |
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