CN105458007A - Production method for magnesium alloy sheet with thickness of 1 mm - Google Patents
Production method for magnesium alloy sheet with thickness of 1 mm Download PDFInfo
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- CN105458007A CN105458007A CN201510823341.3A CN201510823341A CN105458007A CN 105458007 A CN105458007 A CN 105458007A CN 201510823341 A CN201510823341 A CN 201510823341A CN 105458007 A CN105458007 A CN 105458007A
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- magnesium alloy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
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- Mechanical Engineering (AREA)
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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The invention provides a production method for a magnesium alloy sheet with the thickness of 1 mm. The method includes the steps that a double-roll cast rolling device is used for producing a magnesium alloy belt; the thickness of the magnesium alloy belt is controlled to be 3-4 mm, the extruding temperature of the magnesium alloy belt is controlled to be 230-240 DEG C, and the rolling amount of the magnesium alloy belt passing the double-roll cast rolling device each time is controlled to be 10-20%; a uniform structure wholly or partly recrystallized is obtained through homogenizing heat treatment, and the uniform structure is rolled through a magnesium alloy coil rolling device to produce the magnesium alloy sheet; and annealing treatment with the temperature of 420 DEG C is conducted, and finally the magnesium alloy sheet with the thickness of 1 mm is obtained. The production method has the beneficial effects that earlier technology processes are reduced, production cost is saved by 30-40%, the production period is shortened by 20-30%, the rolling extruding temperature and the heat treatment technology are adjusted, so that the material structure is optimized, and the defects of cracking, stripping and the like in the rolling process are overcome.
Description
Technical field
The present invention relates to the production method that a kind of thickness is 1mm magnesium alloy sheet.
Background technology
The technological process of production of most of magnesium alloy sheet is mainly the hot rolling of ingot casting.First ingot casting need soak under suitable Elevated Temperature Conditions, then carries out machining to obtain totally smooth surface to its surface.Surface-treated ingot casting is by adopting preliminary hot rolling, centre/final hot rolling and final annealing technique Rolling Production plate, magnesium ribbon and final thin plate.Under special circumstances, in order to meet the dimensional requirement of thin plate, after intermediate hot, closely follow cold-rolling treatment with the amount of controlled rolling.
For the ingot casting of 1800mm × 1000mm × 300mm.Surface stripping cutting depth normally 3mm.Initial hot-rolled temperature is from 400 DEG C to 460 DEG C, and rolling number of times is generally 25 times, and amount of rolling, from 15% to 40%, is generally 20%, and the slab-thickness of production is 5mm.When needs insulation is more than 400 DEG C, between rolling flow process, alloy is needed to reheat.The temperature of intermediate hot is from 340 DEG C to 430 DEG C, and rolling number of times is 10 times, and each amount of rolling is 8% to 15%, is generally 10%.In order to keep minimum temperature more than 340 DEG C, the complete alloy that needs of each rolling reheats.Final hot rolling makes lath rolling be the thin plate of 0.5mm by adopting middle temperature rolling or cold rolling.Middle temperature rolling temperature is from 190 DEG C to 400 DEG C.Rolling number of times is 10 to 20 times, and amount of rolling is 4% to 10%, is generally 7%.Due to the quick cooling of thin plate, must heat after each rolling.Overheated meeting is considered to cause amount of rolling excessive and the control lost size.Cold-rolling process can ensure final size better, but the operation of rolling only has the amount of rolling of 1% to 2% each time, and therefore will reach final size needs a large amount of rolling number of times.Final annealing process is different according to the difference of the application purpose of magnesium alloy.
Initial hot rolling technology is due to cooling and to reheat thermal loss in process all little, therefore can carry out the rolling of large number of times.But intermediate hot needs to consume a large amount of energy, and need to reheat due to thermal loss before each rolling, the Period Process that significant prolongation thin plate is produced.Meanwhile, intermediate hot can also cause the surface of band and marginal portion to crack, and the yield strength of metal is reduced.This problem in final warm roll in aggravation, this causes needing in final cold-rolling process to consume a large amount of rolling number of times.
Therefore, traditional magnesium alloy sheet technological process of production is loaded down with trivial details, and all along with the loss of energy, can need to carry out extra energy supplement to it, add production cost in each step flow process; Too loaded down with trivial details production procedure consumes a large amount of time, and time production cycle increases, and production efficiency reduces; Too much production stage makes the quality control difficulty of material increase, and inevitably produces defect, reduces the quality of production of product.Therefore, research one is needed can to reduce time and energy ezpenditure, the magnesium alloy thin board production technology of the utilization rate that raises the cost and product quality.
Adopt above-mentioned traditional magnesium alloy thin board production technology need consume a large amount of time and energy, add production cost.
Summary of the invention
For solving Problems existing in above-mentioned technology, the object of this invention is to provide the manufacturing technique method that a kind of thickness is 1mm magnesium alloy sheet, to reduce the production cost of magnesium alloy sheet, and improving the quality of production of product.
For achieving the above object, this technical scheme adopted is to provide the production method that a kind of thickness is 1mm magnesium alloy sheet, and the step of the method includes:
A () adopts double-roller rolling device to produce Magnesium alloy strip;
B () control Magnesium alloy strip thickness is 3-4mm and extrusion temperature is 230-240 DEG C, amount of rolling at every turn through double-roller rolling device is 10-20%, by changing the amount of rolling of Magnesium alloy strip, obtain the Magnesium alloy strip with different tissues, when to 10% amount of rolling, Magnesium alloy strip is deformed dendrites tissue, during about 15% amount of rolling, Magnesium alloy strip is equiaxed grain structure, and during 20% amount of rolling, Magnesium alloy strip is deformed dendrites and equiaxed dendrite line and staff control;
C () has microstructure segregation due to the Magnesium alloy strip obtained in (b) step, need to obtain the uniform formation with all or part of recrystallization through homogenising heat treatment, and crystallite dimension is at 10-15 μm;
D the Magnesium alloy strip after the heat treatment of () homogenising is rolled production magnesium alloy sheet by magnesium alloy coil rolling equipment;
E () carries out temperature to the thin plate that (d) step obtains is 420 DEG C of annealing in process, finally obtains the magnesium alloy sheet that thickness is 1mm.
Effect of the present invention is:
1) adopt novel double-roller casting-rolling technology to produce magnesium alloy sheet and reduce technological process in early stage relative to traditional processing technology, as technological processes such as ingot casting production, ingot casting surface treatment, homogenising heat treatment and initial hot rollings, save production cost 30-40%, the production cycle shortens 20-30%;
2) novel double-roller casting magnesium alloy thin board production technology is by adjustment rolling extrusion temperature and Technology for Heating Processing, optimizes materials microstructure, the generation of the defect such as avoid crackle in the operation of rolling, peel off;
3) novel double-roller casting-rolling technology more easily obtains the magnesium alloy sheet meeting dimensional requirement.
Detailed description of the invention
The production method that thickness of the present invention is 1mm magnesium alloy sheet is illustrated in conjunction with the embodiments,
Thickness of the present invention is the production method of 1mm magnesium alloy sheet, and the step of the method includes: (a)
Double-roller rolling device is adopted to produce Magnesium alloy strip;
B () control Magnesium alloy strip thickness is 3-4mm and extrusion temperature is 230-240 DEG C, amount of rolling at every turn through double-roller rolling device is 10-20%, by changing the amount of rolling of Magnesium alloy strip, obtain the Magnesium alloy strip with different tissues, when to 10% amount of rolling, Magnesium alloy strip is deformed dendrites tissue, during about 15% amount of rolling, Magnesium alloy strip is equiaxed grain structure, and during 20% amount of rolling, Magnesium alloy strip is deformed dendrites and equiaxed dendrite line and staff control;
C () has microstructure segregation due to the Magnesium alloy strip obtained in (b) step, need to obtain the uniform formation with all or part of recrystallization through homogenising heat treatment, and crystallite dimension is at 10-15 μm;
D the Magnesium alloy strip after the heat treatment of () homogenising is rolled production magnesium alloy sheet by magnesium alloy coil rolling equipment;
E () carries out temperature to the thin plate that (d) step obtains is 420 DEG C of annealing in process, finally obtains the magnesium alloy sheet that thickness is 1mm.
Thickness of the present invention is that the production method function of 1mm magnesium alloy sheet is achieved in that
1) adopt double-roller rolling device, rolling temperature is 200 DEG C to 350 DEG C, and the magnesium alloy thickness of slab after rolling is less than 10mm;
2) adopt double-roller rolling device, rolling temperature is 200 DEG C to 260 DEG C, and the magnesium alloy thickness of slab after rolling is less than 7mm;
3) the double-roller rolling device developed voluntarily is adopted, rolling temperature is 200 DEG C to 220 DEG C, and the magnesium alloy thickness of slab after rolling is 4mm to 5mm, and Magnesium alloy strip is organized as deformed dendrites and a large amount of equiaxed dendrite freely, deformed dendrites is elongated along rolling direction, and its direction of growth is parallel to magnesium ribbon surface;
4) adopt double-roller rolling device, rolling temperature is 200 DEG C to 245 DEG C, and the magnesium alloy thickness of slab after rolling is less than 4mm, and Magnesium alloy strip is organized as deformed dendrites and a large amount of equiaxed dendrite freely;
5) adopt the double-roller rolling device developed voluntarily, rolling temperature is 230 DEG C to 240 DEG C, and the thickness of slab after rolling is 4mm to 5mm, and magnesium ribbon is organized as a large amount of spherical equiaxed dendrite;
6) adopt the double-roller rolling device developed voluntarily, rolling temperature is at least 245 DEG C, and the magnesium alloy thickness of slab after rolling is less than 4mm, and Magnesium alloy strip is organized as a large amount of spherical equiaxed dendrite;
7) by 6) in Magnesium alloy strip put into stove, 340 DEG C to 360 DEG C moderate temperature soak process;
8) by 7) in furnace temperature be elevated to 400 DEG C to 500 DEG C homogenising heat treatments;
9) by 8) in magnesium ribbon carry out final hot rolling process, rolling temperature is 200 DEG C to 500 DEG C, and amount of rolling is 20% to 25%;
10) by 9) in Magnesium alloy strip carry out final hot rolling process, rolling temperature is 350 DEG C to 500 DEG C, and amount of rolling is 20% to 25%;
11) by 10) in Magnesium alloy strip carry out final hot rolling process, rolling temperature is 400 DEG C to 500 DEG C, and amount of rolling is 20% to 25%;
12) by 11) in Magnesium alloy strip carry out final cold-rolling treatment, amount of rolling is 15% to 25%;
13) by 12) in Magnesium alloy strip carry out annealing in process, annealing temperature is 350 DEG C, annealing time 60 minutes, or annealing temperature 420 DEG C, annealing time 30 minutes.
Claims (1)
1. thickness is a production method for 1mm magnesium alloy sheet, and the step of the method includes:
A () adopts double-roller rolling device to produce Magnesium alloy strip;
B () control Magnesium alloy strip thickness is 3-4mm and extrusion temperature is 230-240 DEG C, amount of rolling at every turn through double-roller rolling device is 10-20%, by changing the amount of rolling of Magnesium alloy strip, obtain the Magnesium alloy strip with different tissues, when to 10% amount of rolling, Magnesium alloy strip is deformed dendrites tissue, during about 15% amount of rolling, Magnesium alloy strip is equiaxed grain structure, and during 20% amount of rolling, Magnesium alloy strip is deformed dendrites and equiaxed dendrite line and staff control;
C () has microstructure segregation due to the Magnesium alloy strip obtained in (b) step, need to obtain the uniform formation with all or part of recrystallization through homogenising heat treatment, and crystallite dimension is at 10-15 μm;
D the Magnesium alloy strip after the heat treatment of () homogenising is rolled production magnesium alloy sheet by magnesium alloy coil rolling equipment;
E () carries out temperature to the thin plate that (d) step obtains is 420 DEG C of annealing in process, finally obtains the magnesium alloy sheet that thickness is 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510823341.3A CN105458007A (en) | 2015-11-24 | 2015-11-24 | Production method for magnesium alloy sheet with thickness of 1 mm |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510823341.3A CN105458007A (en) | 2015-11-24 | 2015-11-24 | Production method for magnesium alloy sheet with thickness of 1 mm |
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| CN105458007A true CN105458007A (en) | 2016-04-06 |
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| CN201510823341.3A Pending CN105458007A (en) | 2015-11-24 | 2015-11-24 | Production method for magnesium alloy sheet with thickness of 1 mm |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109504884A (en) * | 2019-01-10 | 2019-03-22 | 吉林大学 | Polynary a small amount of high-strength plasticity magnesium alloy and its heavy reduction short flow process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1764512A (en) * | 2003-02-28 | 2006-04-26 | 联邦科学和工业研究组织 | Magnesium alloy sheet and its production |
| CN101190491A (en) * | 2006-11-24 | 2008-06-04 | 辽宁科技大学 | Rolling controlling method and device for double-roller continuous casting magnesium alloy sheet |
| CN101580921A (en) * | 2009-06-23 | 2009-11-18 | 北京广灵精华科技有限公司 | Method for producing magnesium alloy sheet |
| JP4852754B2 (en) * | 2006-09-15 | 2012-01-11 | 国立大学法人富山大学 | Magnesium alloy for drawing, press forming plate material made of the alloy, and method for producing the same |
| CN102383076A (en) * | 2011-11-02 | 2012-03-21 | 江苏昊达有限责任公司 | Method for preparing magnesium alloy thin strip for mobile phone shell |
| CN102430573A (en) * | 2011-11-02 | 2012-05-02 | 江苏昊达有限责任公司 | Manufacturing process of magnesium alloy strips for housings of mobile phones |
-
2015
- 2015-11-24 CN CN201510823341.3A patent/CN105458007A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1764512A (en) * | 2003-02-28 | 2006-04-26 | 联邦科学和工业研究组织 | Magnesium alloy sheet and its production |
| JP4852754B2 (en) * | 2006-09-15 | 2012-01-11 | 国立大学法人富山大学 | Magnesium alloy for drawing, press forming plate material made of the alloy, and method for producing the same |
| CN101190491A (en) * | 2006-11-24 | 2008-06-04 | 辽宁科技大学 | Rolling controlling method and device for double-roller continuous casting magnesium alloy sheet |
| CN101580921A (en) * | 2009-06-23 | 2009-11-18 | 北京广灵精华科技有限公司 | Method for producing magnesium alloy sheet |
| CN102383076A (en) * | 2011-11-02 | 2012-03-21 | 江苏昊达有限责任公司 | Method for preparing magnesium alloy thin strip for mobile phone shell |
| CN102430573A (en) * | 2011-11-02 | 2012-05-02 | 江苏昊达有限责任公司 | Manufacturing process of magnesium alloy strips for housings of mobile phones |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109504884A (en) * | 2019-01-10 | 2019-03-22 | 吉林大学 | Polynary a small amount of high-strength plasticity magnesium alloy and its heavy reduction short flow process |
| CN109504884B (en) * | 2019-01-10 | 2020-07-28 | 吉林大学 | Multi-element small-quantity high-strength plastic magnesium alloy and large-reduction-quantity short-flow preparation method thereof |
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