CN107030112A - A kind of milling method of magnesium alloy ultrathin plate - Google Patents
A kind of milling method of magnesium alloy ultrathin plate Download PDFInfo
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- CN107030112A CN107030112A CN201710228100.3A CN201710228100A CN107030112A CN 107030112 A CN107030112 A CN 107030112A CN 201710228100 A CN201710228100 A CN 201710228100A CN 107030112 A CN107030112 A CN 107030112A
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- magnesium alloy
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Classifications
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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
- B21B1/40—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 foils which present special problems, e.g. because of thinness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/48—Tension control; Compression control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a kind of milling method of magnesium alloy ultrathin plate, it is characterised in that comprises the following steps：A. the magnesium alloy plate two ends for needing to roll are clamped and allows magnesium alloy plate to produce tension force；B. magnesium alloy plate is heated；C. a time rolling is carried out to magnesium alloy plate using Rolling roller；D. repeat step B and step C, until magnesium alloy plate is rolled down into preset thickness.Magnesium alloy ultrathin plate milling method with above-mentioned steps, on-line heating is carried out to magnesium alloy plate and is rolled, and the tension force of rolling temperature, rolling speed, percentage pass reduction and application per a time is being continually changing, and finally can be rolled into 0.8mm ultra thin plates.And the magnesium alloy ultrathin plate has stronger mechanical performance.
Description
Technical field
The present invention relates to a kind of method for rolling ultra-thin magnesium alloy plate.
Background technology
Magnesium alloy plate has the features such as lightweight, damping property is good, toughness is high, thermal diffusivity is good, and it is also equipped with electromagnetic wave
The functions such as shielding, have been increasingly being applied to aviation, communication, electronics and automotive field at present.
Magnesium alloy is traditionally considered as a kind of metal for being difficult to be plastically deformed, pressure machining characteristics are poor, and wrought magnesium alloy adds
Work technical study progress is relatively slow, and main cause is that the plastic deformation ability of wrought magnesium alloy is poor, using traditional plasticity
Process technology is difficult to solve this problem.Current wrought magnesium alloy mainly passes through extruding, rolling, forging, punching press, bending, stretching
Produced Deng plastic processing method, its medium section, tubing, bar are mainly produced by hot extrusion technique, and sheet material mainly leads to
Cross hot rolling technology to complete, traditional magnesium alloy board production technology is back and forth rolled using device of shifting block type monolithic：Slab hot-rolling cogging
Or extrusion blooming obtains the thick slabs of 8-10mm, cuts into the monolithic of 1000-3000mm length, then by hot rolling, warm-rolling work
Skill, centre must repeatedly anneal, and the sheet material of thickness, finally also needs to anneal to finished product needed for finally giving.
The operation of rolling of magnesium alloy plate is a complicated Thermal-mechanical Coupling process.Due to magnesium alloy volumetric specific heat capacity compared with
Small, and the physical property such as thermal conductivity is larger, its operation of rolling is more complicated, and macro manifestations are that magnesium alloy heat temperature raising and radiating are dropped
Temperature is very fast.Temperature is most important factor during magnesium alloy rolling, and magnesium alloy deformation tissue is very sensitive to temperature.Room temperature
Lower magnesium alloy plastic deformation is basal slip, and the potential slip system such as prismatic surface and the conical surface is swashed under certain rolling temperature
It is living, so as to significantly improve the roll forming ability of magnesium alloy plate.Rolling temperature needs to control within limits, such as
Fruit temperature is too high, and 1 consumes the energy during actual industrial production, produces unnecessary waste；2 may occur secondary recrystallization
Crystal grain is caused to be grown up, rear material property is rolled in influence；The serious infringement surface quality of 3 plate surfaces oxidation；4 for thin plate rolling,
Easily there is softening phenomenon of rupture.But if rolling temperature is too low, 1 magnesium plate can not be thick by dynamic recrystallization crystal grain thinning
Grain structure can have substantial amounts of twin；2 magnesium alloy plate materials easily ftracture, and material internal easily has inhomogeneous deformation,
Anisotropy is produced simultaneously, and the following process to magnesium plate is very unfavorable.
The control of temperature to rolling magnesium plate it is very important, using traditional handicraft roll out come magnesium plate need centre multi-pass
Annealing, influence of rolled efficiency.
The content of the invention
For above-mentioned technical problem, the present invention provides a kind of milling method of magnesium alloy ultrathin plate, can rolled
Go out ultra-thin magnesium alloy plate, and its tensile strength, yield strength and elongation percentage are higher.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of rolling side of magnesium alloy ultrathin plate
Method, comprises the following steps：
A. the magnesium alloy plate two ends for needing to roll are clamped and allows magnesium alloy plate to produce tension force；
B. on-line heating is carried out to magnesium alloy plate；
C. a time rolling is carried out to magnesium alloy plate using roll；
D. repeat step B and step C, until magnesium alloy plate is rolled down into preset thickness.
As an improvement, often roll after a passage, rolling is reverse rolling next time.
As an improvement, the rolling temperature of the not higher than upper a time of every time rolling temperature.Using cooling rolling
Mode because with the increase of passage.Magnesium plate more and more thinner, if also according to high temperature rolling, sheet material be particularly easy to because
There is roll banding in rolling temperature height.And the energy is consumed during actual industrial production if temperature is too high, 1, it is unnecessary to produce
Waste；2, which may occur secondary recrystallization, causes crystal grain to be grown up, and rear material property is rolled in influence；The serious infringement table of 3 plate surfaces oxidation
Face quality；4 for thin plate rolling, easily occur softening phenomenon of rupture.
As upper one it is improved it is a kind of preferably, rolling temperature is from 350 DEG C of the first passage gradually near last a time
170℃。
As an improvement, during magnesium alloy plate head passes, using 10-15% percentage pass reduction；Remaining passage is used
20-25% percentage pass reduction.Fuel factor during magnesium alloy rolling is than larger.During first passes, sheet material temperature is higher, holds sway
When secondary drafts is excessive, the fuel factor of alloy is likely to make alloy temperature exceed hot rolling temperature range and deteriorate product properties.Cause
This, the drafts of the first passage of the preferential magnesium alloy plate of this improvement is 10-15%.With the improvement of sheet material tissue（After slubbing time）,
Under conditions of machine utilization permission, reduction in pass should be increased as much as possible, the high-temp plastic of alloy is made full use of, increase road
Secondary drafts, improves production efficiency, the preferred 20-25% of this improvement.
As an improvement, the tension force at magnesium alloy plate two ends is equal, and its tension value reduces with the increase of passage.This improvement
Press from both sides magnesium plate two ends to set up tension-rolling by the hydraulically operated fixture of high-strength hydraulic pressure tension test milling train.Pass through tension sensor and position
Displacement sensor accurately controls the size of tension force, can be arranged as required to the size of front and rear tension force.In the operation of rolling, tension force
Size setting is very crucial, and tension force is too small, does not show the advantage of tension force, and plate shape cannot be guaranteed, and occurs that magnesium plate sideslip shows
As.Overtension, can increase capacity motor, increase energy consumption, it is also possible to make the narrowed width of magnesium plate or even exceed magnesium plate
It is plastically deformed the limit and breaks.Therefore, it is necessary to according to actual conditions, correct design left and right tension value.With the increase of passage, roll
The thickness of plate reduces, and to keep tensile stress size constant or tensile stress size keeps stable, thus set tension value when
Wait, can reduce with the increase of passage.
Improved a kind of preferred as upper one kind, the tension force at magnesium alloy plate two ends is gradually decreased to from the 5KN of the first passage
The 2KN of last a time.
As an improvement, every time rolling speed is not less than the rolling speed of a time.（With the increasing of passage
Plus, the thickness of sheet material reduces, because the volumetric specific heat capacity of magnesium alloy is smaller, and the physical property, macro manifestations such as thermal conductivity is larger
It is very fast for radiating and cooling during magnesium alloy rolling.If rolling the rolling that speed also keeps a time in sheet metal thickness hour
If speed, sheet material easily produces side and split.
Improved a kind of preferred as upper one kind, the 0.05m/s of rolling speed from the first passage gradually rises up to last
The 0.16m/s of passage.
The present invention is advantageous in that：Magnesium alloy ultrathin plate milling method with above-mentioned steps, enters to magnesium alloy plate
Row on-line heating is simultaneously rolled, and the tension force of rolling temperature, rolling speed and application per a time is being continually changing,
Finally it can be rolled into 0.8mm ultra thin plates.And the magnesium alloy ultrathin plate is not in the case where carrying out subsequent heat treatment, with preferable
Mechanical performance.
Brief description of the drawings
Fig. 1 is the device structure schematic diagram for implementing the present invention.
Marked in figure：1 tension force hydraulic cylinder, 2 clamps, 3 Rolling rollers, 4 temperature sensors, 5 electric heater units.
Embodiment
Below in conjunction with the accompanying drawings, the present invention is described in detail.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Roll mill shown in Fig. 1 is a kind of equipment for realizing the present invention, including the tension force hydraulic pressure that left and right two is oppositely arranged
Cylinder 1, the front end of tension force hydraulic cylinder 1 is provided with the clamp 2 for clamping magnesium alloy plate.Also include being used for the Rolling roller 3 of rolling a pair,
And for heating the heater 5 of magnesium alloy plate, and the temperature sensor 4 for temperature control.
Comprise the following steps when rolling：
A. the magnesium alloy plate two ends for needing to roll are clamped and allows magnesium alloy plate to produce tension force.Magnesium alloy plate is entered in roll mill
Clamped on the clamp of mouth side tension force hydraulic cylinder, rolling roller gap is set to specify open height, manually by entrance side tension force hydraulic pressure
Cylinder is slowly moved forward, and is aided in by operative employee, and magnesium alloy plate is passed through into frame, the chuck inner clip of outlet side tension force hydraulic cylinder is delivered to
Tightly；Both sides tension force hydraulic cylinder is set to produce tension force（System builds tension force automatically）, and magnesium plate is moved to the extreme position of side.
B. on-line heating is carried out to magnesium alloy plate；Electrified regulation, is used as by thermocouple to the temperature detection on magnesium plate surface
Real time temperature feeds back, and temperature scaling factor is carried out by PLC control system adjust automatically transformer output current, to reach setting
Target temperature.
C. a time rolling is carried out to magnesium alloy plate using roll；Adjust automatically roll gap, when working roll is contacted with magnesium plate
Roll-force is produced, starts to roll under weathering zone load pressure；After the setting roll gap of roll gap regulation to the passage, raising speed is rolled to stable
Speed processed, is automatically stopped in the restraining position for being rolled down to the blank other end.
D. repeat step B and step C, until magnesium alloy plate is rolled down into preset thickness.Often roll after a passage, under
Once rolling is reverse rolling.After the completion of whole passes, any side clips pincers are unclamped, by opposite side tension force hydraulic pressure
Cylinder slowly extracts the magnesium alloy ultrathin plate rolled out in roll gap, unclamps another side bitting clamp, and the operation of rolling terminates.
In the operation of rolling, the setting of its parameter should follow following principle：
1. the rolling temperature of the not higher than upper a time of every time rolling temperature.Rolling temperature from 350 DEG C of the first passage by
Gradually it is down to 170 DEG C of last a time.
2. magnesium alloy plate head is using 10-15% percentage pass reduction；Remaining each passage uses 20-25% percentage pass reduction.
3. the tension force at magnesium alloy plate two ends is equal, its tension value reduces with the increase of passage.At magnesium alloy plate two ends
The 5KN of power from the first passage gradually decreases to the 1KN of last a time.
4. every time rolling speed is not less than the rolling speed of a time.Speed is rolled from the first passage
0.05m/s gradually rises up to the 0.16m/s of last a time.
The present invention is explained below by one embodiment.
Magnesium alloy plate two ends are clamped first with clamp, the tension force at two ends is respectively 5KN.It is then turned on electrical heating dress
Put, magnesium alloy plate is heated to carrying out after 350 DEG C to the rolling of first time.Original plate is 4 millimeters, the first passage Rolling roller roller
Stitch as 3.7 millimeters, rolling speed is 0.05m/s, reduction ratio 11.00%.Thickness after magnesium alloy plate rolling is 3.56 millimeters.When
So, reduction ratio can also be arranged between 10-15% so that the thickness after rolling is 3.40-3.60 millimeters.
Second passage is reverse rolling, and the tension force at two ends is respectively 5KN.Heating-up temperature is 320 DEG C.Rolling roller gap is
2.96 millimeters, rolling speed is 0.06m/s, reduction ratio 20%.Thickness after magnesium alloy plate rolling is 2.8 millimeters.
Four-pass two ends tension force is respectively 4KN, and heating-up temperature is 260 DEG C.It is 1.89 millimeters to roll roller gap, rolling speed
Rate is 0.1 m/s, reduction ratio 25.00%.Thickness after magnesium alloy plate rolling is 1.42 millimeters.
6th passage two ends tension force is respectively 3KN, and heating-up temperature is 200 DEG C.It is 1.21 millimeters to roll roller gap, rolling speed
Rate is 0.14 m/s, reduction ratio 21.00%.Thickness after magnesium alloy plate rolling is 1.1 millimeters.
7th passage two ends tension force is respectively 2KN, and heating-up temperature is 170 DEG C.It is 0.96 millimeter to roll roller gap, rolling speed
Rate is 0.16 m/s, reduction ratio 22.00%.Thickness after magnesium alloy plate rolling is 0.80 millimeter.
Finally, magnesium alloy plate is rolled into the thick ultra thin plates of 0.8mm, and the yield strength of rolling state magnesium plate is 250-
280Mpa, tensile strength is 340-360 Mpa.Elongation percentage is 15-16%.Magnesium is closed after 300 DEG C of 1 hour homogenizing annealings
The performance of golden plate material：Yield strength is 180-200Mpa, tensile strength：310-320MPa；Elongation percentage is 19-21%.
And traditional rolling technique without final annealing when, elongation percentage is only 5% or so.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (9)
1. a kind of milling method of magnesium alloy ultrathin plate, it is characterised in that comprise the following steps：
A. the magnesium alloy plate two ends for needing to roll are clamped and allows magnesium alloy plate to produce tension force；
B. on-line heating is carried out to magnesium alloy plate；
C. a time rolling is carried out to magnesium alloy plate using roll；
D. repeat step B and step C, until magnesium alloy plate is rolled down into preset thickness.
2. a kind of milling method of magnesium alloy ultrathin plate according to claim 1, it is characterised in that：Often roll a passage
Afterwards, rolling is reverse rolling next time.
3. a kind of milling method of magnesium alloy ultrathin plate according to claim 1, it is characterised in that：Every time rolling temperature
The rolling temperature of the not higher than upper a time of degree.
4. a kind of milling method of magnesium alloy ultrathin plate according to claim 3, it is characterised in that：Rolling temperature is from first
170 DEG C of the gradually near last a time of 350 DEG C of passage.
5. a kind of milling method of magnesium alloy ultrathin plate according to claim 1, it is characterised in that：Magnesium alloy plate head passages
During rolling, using 10-15% percentage pass reduction；Remaining passage uses 20-25% percentage pass reduction.
6. a kind of milling method of magnesium alloy ultrathin plate according to claim 1, it is characterised in that：Magnesium alloy plate two ends
Tension force is equal, and its tension value reduces with the increase of passage.
7. a kind of milling method of magnesium alloy ultrathin plate according to claim 6, it is characterised in that：Magnesium alloy plate two ends
Tension force gradually decreases to the 2KN of last a time from the 5KN of the first passage.
8. a kind of milling method of magnesium alloy ultrathin plate according to claim 1, it is characterised in that：Every time rolling speed
Rate is not less than the rolling speed of a time.
9. a kind of milling method of magnesium alloy ultrathin plate according to claim 8, it is characterised in that：Speed is rolled from first
The 0.05m/s of passage gradually rises up to the 0.16m/s of last a time.
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| CN201710131698 | 2017-03-07 | ||
| CN2017101316984 | 2017-03-07 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109108072A (en) * | 2018-10-23 | 2019-01-01 | 西部新锆核材料科技有限公司 | A kind of milling method of high-precision zircaloy plate |
| CN110328244A (en) * | 2019-07-09 | 2019-10-15 | 东北大学 | A kind of Straight pull is cold/hydraulic tensioning system and its control method of warm-rolling experimental machine |
| CN110404966A (en) * | 2018-04-27 | 2019-11-05 | 宝山钢铁股份有限公司 | It is used to prepare the roughing technique and method of high-strength high-tractility magnesium alloy thin plate |
| CN111801173A (en) * | 2018-03-09 | 2020-10-20 | 首要金属科技德国有限责任公司 | Edge wear prevention during rolling of flat rolling stock |
| CN112474802A (en) * | 2020-11-19 | 2021-03-12 | 中北大学 | Equipment and method for preparing stainless steel/aluminum/stainless steel laminated composite board |
| CN112718865A (en) * | 2021-01-08 | 2021-04-30 | 中铝东南材料院（福建）科技有限公司 | Production method for reducing aluminum adhesion on surface of aluminum alloy hot rolling roller and aluminum powder |
| CN113231482A (en) * | 2021-05-24 | 2021-08-10 | 巢湖云海镁业有限公司 | Asynchronous warm rolling device for wide magnesium alloy plate-shaped strip |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111801173A (en) * | 2018-03-09 | 2020-10-20 | 首要金属科技德国有限责任公司 | Edge wear prevention during rolling of flat rolling stock |
| CN111801173B (en) * | 2018-03-09 | 2022-06-14 | 首要金属科技德国有限责任公司 | Edge wear prevention during rolling of flat rolling stock |
| CN110404966A (en) * | 2018-04-27 | 2019-11-05 | 宝山钢铁股份有限公司 | It is used to prepare the roughing technique and method of high-strength high-tractility magnesium alloy thin plate |
| CN109108072A (en) * | 2018-10-23 | 2019-01-01 | 西部新锆核材料科技有限公司 | A kind of milling method of high-precision zircaloy plate |
| CN110328244A (en) * | 2019-07-09 | 2019-10-15 | 东北大学 | A kind of Straight pull is cold/hydraulic tensioning system and its control method of warm-rolling experimental machine |
| CN112474802A (en) * | 2020-11-19 | 2021-03-12 | 中北大学 | Equipment and method for preparing stainless steel/aluminum/stainless steel laminated composite board |
| CN112718865A (en) * | 2021-01-08 | 2021-04-30 | 中铝东南材料院（福建）科技有限公司 | Production method for reducing aluminum adhesion on surface of aluminum alloy hot rolling roller and aluminum powder |
| CN112718865B (en) * | 2021-01-08 | 2022-08-05 | 中铝东南材料院（福建）科技有限公司 | Production method for reducing aluminum adhesion on surface of aluminum alloy hot rolling roller and aluminum powder |
| CN113231482A (en) * | 2021-05-24 | 2021-08-10 | 巢湖云海镁业有限公司 | Asynchronous warm rolling device for wide magnesium alloy plate-shaped strip |
| CN113231482B (en) * | 2021-05-24 | 2023-08-01 | 巢湖云海镁业有限公司 | Asynchronous warm rolling device for wide magnesium alloy plate-shaped strip |
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Application publication date: 20170811 |