CN102125932A - Hot rolling device for magnesium alloy and rolling heating method - Google Patents
Hot rolling device for magnesium alloy and rolling heating method Download PDFInfo
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- CN102125932A CN102125932A CN 201010591333 CN201010591333A CN102125932A CN 102125932 A CN102125932 A CN 102125932A CN 201010591333 CN201010591333 CN 201010591333 CN 201010591333 A CN201010591333 A CN 201010591333A CN 102125932 A CN102125932 A CN 102125932A
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Abstract
The invention provides a hot rolling device for magnesium alloy and a rolling heating method. The hot rolling device consists of a reversing rolling mill, a conveying roller table, a coiling machine, a roller heater, a roller table heater and a plate blank edge heater. When magnesium alloy plates are rolled, the conveying roller table on which the roller is contacted with a magnesium alloy plate blank is preheated, the plate blank is heated during rolling, and the temperature reduction in the rolling process is controlled, so that the plate blank is rolled into a coil. Compared with the traditional magnesium alloy rolling device, the device has the characteristics of high production efficiency, high yield, low cost and the like. In addition, the rolling temperature, particularly the finish rolling temperature can be accurately controlled, and the recrystallization grain size of the magnesium alloy can be controlled; therefore, magnesium alloy strips produced by the equipment have the characteristic of good mechanical properties.
Description
Technical field
The invention belongs to non-ferrous metal plastic working field, relate to the hot-rolling arrangement of magnesium alloy plate and band.
Background technology
Magnesium alloy has that density is low, specific strength is high, has bigger application potential as lightweight structural material in fields such as electronic product casing such as field of traffic such as automobile, motorcycle, bullet train, aircraft and notebook computer, mobile phone, digital cameras.But magnesium alloy is compared with other metal and is difficult to plastic working, has hindered particularly exploitation and the application of magnesium alloy sheet in above-mentioned application of wrought magnesium alloy.
Concrete reason has:
(1) magnesium alloy commonly used belongs to the close-packed hexagonal crystal structure, at room temperature, has only a slide surface usually, three slip systems.This is the relatively poor basic reason of plasticity.
(2) the hot processing temperature scope of magnesium alloy is narrower.
(3) the volume heat content of magnesium alloy is lower, compares easier heat radiation with other metal.
Because top three aspects cause magnesium alloy to occur crackle easily in the operation of rolling, percent defective is higher.
Since magnesium alloy hot processing temperature narrow range, easily heat radiation again, and present hot rolling normally after rolling 1-2 passage, reheats plate, and then is rolled, to guarantee carrying out smoothly of plastic deformation.But this rolling mill practice is not easy control, is easy to occur crackle, and yield rate is lower.
Chinese patent application 200880111488.8(magnesium alloy hot-rolling mill), one kind of 200610011745.3(is used for the rolling device that magnesium alloy strip coil is produced) five equilibrium has supplied a kind of magnesium alloy hot-rolling mill indescribably, but this device can only be used for the hot rolling of magnesium alloy strip coil base.At present the magnesium alloy strip coil base can't resemble and obtain by hot rolling cogging steel and the aluminium alloy.And the hot extrusion rolling is adopted in the production of magnesium alloy made-up belt at present usually, and also there is a problem in this, extruded stock joint easily broken base in the tension-rolling process, and influence of rolled rhythm, even cause rolling can't carrying out.And the recovery rate of hot extrusion cogging is lower than hot rolling cogging.
In addition, Chinese patent application number 200810088216.2 disclosed two roller reversible rollings of a kind of Frequency Induction Heating formula heat and milling methods, its carry solved the magnesium alloy blank in the deformed area to the heat transfer of roll, and do not consider the aerial heat radiation of magnesium alloy and and roller-way between heat transfer.
Summary of the invention
The purpose of this invention is to provide a kind of magnesium alloy hot-rolling mill, heating in the middle of need not from cogging to rolling has production efficiency height, lumber recovery height, characteristics that cost is low.
Above-mentioned purpose realizes by following technical scheme:
A kind of magnesium alloy hot-rolling mill includes into the reversable mill of breaker roll, the roller-way that is installed in the reversable mill front and back and the coiling machine that is installed in the roller-way end, it is characterized in that:
Roll above and below at described reversable mill is provided with the roll heater, is controlled by controller;
Upper and lower settings at described roller-way has the roller-way stay-warm case of being with the roller-way heater, and described roller-way heater is arranged on roller-way stay-warm case inboard, and realizes closed-loop control with the infrared radiation thermometer of measuring the steel slab surface temperature by controller;
Be provided with slab strip edge heater and limit portion stay-warm case in the both sides of described roller-way, and realize closed-loop control by controller with the infrared radiation thermometer of measuring slab limit portion surface temperature.
Heater can adopt infrared heating, eddy-current heating, quartz ampoule heating etc.
It is as follows to utilize said apparatus to be rolled the method for heating:
(1) roll and roller-way preheating: before hot rolling, by preheating device with more than the roller surface preheating temperature to 120 ℃; Open roller-way heater and slab strip edge heater in the stay-warm case simultaneously,, the surface temperature of conveying roller is preheated to more than 100 ℃ the rollgang preheating.Can reduce when rolling rolled piece to the heat transfer of roll and roller-way by pre-hot roll and roller-way.
(2) in the operation of rolling, controller is by obtaining the temperature signal of the infrared radiation thermometer of measuring the steel slab surface temperature, and control is arranged in the heating-up temperature of roller-way roller-way heater up and down; What controller pair roller channel heater was carried out is segmentation control, and when roughing, slab is shorter, and control is high-power heating from the near roller-way heater of roll, and is the small-power heating from roll roller-way heater far away, only plays the effect of preheating rollgang; When finish rolling, the power of accurately controlling institute's having heaters by controller reaches finishing temperature and coiling temperature more than the recrystallization temperature of magnesium alloy; If the temperature of blank is higher than when being scheduled to rolling temperature, close heater, or further open stay-warm case up and down, accelerate the blank cooling velocity.
(3) in the operation of rolling, controller is by obtaining the temperature signal of the infrared radiation thermometer of measuring plate ingot limit portion surface temperature, control is arranged on the heating-up temperature of the slab strip edge heater on roller-way both sides, reduces the temperature drop of slab limit portion, prevents the generation that the limit is split in the operation of rolling.
The hot-rolling arrangement that the present invention mentions can be a two-roller mill, also can be four-high mill, even multi-roll mill.Singlestandmill, also multimachine frame tandem rolling.
Magnesium alloy hot-rolling mill of the present invention except that the hot rolling that is used for magnesium alloy, can also be used for the hot rolling that other difficulty is rolled metal, as hard alloy steel, high alloy special steel, aluminium lithium alloy, zircaloy etc.
Characteristics of the present invention are when magnesium alloy plate is rolling, and the rollgang that breaker roll contacts with magnesium alloy slab carries out preheating, and in the operation of rolling slab are heated, and the temperature drop in the controlled rolling process makes slab rolling to rolling.Compare with traditional magnesium alloy rolling, have characteristics such as production efficiency height, lumber recovery height, cost be low.In addition, because can accurately controlled rolling temperature, particularly finishing temperature, can control the size of magnesium alloy recrystallization crystal particle dimension, so have the characteristics of good mechanical performance with the magnesium alloy strip of device fabrication of the present invention.
Description of drawings
Fig. 1 is the work schematic diagram (hot rough rolling step) of the hot-rolling arrangement among the present invention;
The work schematic diagram of the hot-rolling arrangement among Fig. 2 the present invention (last passage of hot finishing);
The hot-rolling arrangement roller-way stay-warm case among Fig. 3 the present invention and the layout schematic diagram of heater;
The roller-way cutaway view of the hot-rolling arrangement among Fig. 4 the present invention.
Among the figure: 1 rollgang, 2 roller-way stay-warm cases, 3 roll heaters, 4 reversable mills, 5 rolls, 6 magnesium alloy slabs, 7 coiling machines, 8 roller-way heaters, 9 slab strip edge heaters, 10 slab limit portion stay-warm cases.
The specific embodiment
As Fig. 1-shown in Figure 4, this hot-rolling arrangement is by the reversable mill 4 of one two roll, rollgang 1, coiling machine 7, and roll heating 3, roller-way heater 8, slab strip edge heater 9 are formed.On the above and below of the roll 5 of reversable mill 4, roll heater 3 is installed, in the above and below of rollgang 1 roller-way stay-warm case 2 is installed, roller-way stay-warm case 2 inboards are provided with roller-way heater 8, slab limit portion stay-warm case 10 also is installed in the both sides of rollgang 1, slab limit portion stay-warm case 10 inboards are provided with slab strip edge heater 9, according to the width of rolled slab, strip edge heater and stay-warm case can move left and right (figure as 4), make heating region more reasonable and energy-conservation.End at rollgang 1 is arranged coiling machine 6.
Open roll heater 3 before rolling, and make roller surface preheating temperature to 150 ℃.Open roller-way heater 8 simultaneously, make the surface temperature of rollgang 1 be preheated to 120 ℃.The magnesium alloy slab 6 that is heated to 450 ℃ is transferred to 5 on roll by rollgang 1, and to carry out multi-pass rolling.By the temperature that infrared radiation thermometer is tested steel slab surface and side respectively, after the controller processing, distinguish the power of control roll channel heater 8 and slab strip edge heater 9.In the operation of rolling, the slab thickness attenuate, length increases.Therefore the roller-way heater on the roller-way stay-warm case 28 is carried out segmentation control, and when roughing, slab is shorter, and the heater near from roll can high-powerly heat, and with the small-power heating, only plays the effect of preheating rollgang from roll zone far away.During finish rolling, can accurately control the power of institute's having heaters, make finishing temperature with coiling temperature more than the recrystallization temperature of magnesium alloy.If the temperature of blank is higher than predetermined rolling temperature, can close heater during finish rolling, even open roller-way stay-warm case 2 up and down, accelerate its cooling velocity.
During finish to gauge, slab enters coiling machine 7 by rollgang 1, and hot rolling becomes magnesium alloy strip coil.
Claims (3)
1. a magnesium alloy hot-rolling mill comprises reversable mill, is installed in the roller-way of reversable mill front and back and the coiling machine that is installed in the roller-way end, it is characterized in that:
Roll above and below at described reversable mill is provided with the roll heater, is controlled by controller;
Upper and lower settings at described roller-way has the roller-way stay-warm case of being with the roller-way heater, and described roller-way heater is arranged on roller-way stay-warm case inboard, and realizes closed-loop control with the infrared radiation thermometer of measuring the steel slab surface temperature by controller;
Be provided with slab strip edge heater and slab limit portion protective cover in the both sides of described roller-way, and realize closed-loop control by controller with the infrared radiation thermometer of measuring slab limit portion surface temperature.
2. magnesium alloy hot-rolling mill according to claim 1 is characterized in that, described heater adopts infrared heating, eddy-current heating or quartz ampoule heat form.
3. utilize the described device of claim 1 to be rolled the method for heating, it is characterized in that described method is:
(1) roll and roller-way preheating: before hot rolling, with more than the roller surface preheating temperature to 120 ℃, reduce when rolling rolled piece to the heat transfer of roll by the roll heater; Open roller-way heater and slab strip edge heater simultaneously, to the rollgang preheating;
(2) in the operation of rolling, controller is by obtaining the temperature signal of the infrared radiation thermometer of measuring the steel slab surface temperature, and control is arranged in the heating-up temperature of roller-way roller-way heater up and down; What controller pair roller channel heater was carried out is segmentation control, and when roughing, control is high-power heating from the near roller-way heater of roll, and is the small-power heating from roll roller-way heater far away, only plays the effect of preheating rollgang; When finish rolling, the power of accurately controlling institute's having heaters by controller reaches finishing temperature and coiling temperature more than the recrystallization temperature of magnesium alloy; If the temperature of blank is higher than when being scheduled to rolling temperature, close heater, or further open roller-way stay-warm case up and down, accelerate the blank cooling velocity;
(3) in the operation of rolling, controller is by obtaining the temperature signal of the infrared radiation thermometer of measuring plate ingot limit portion surface temperature, control is arranged on the heating-up temperature of the slab strip edge heater on roller-way both sides, reduces the temperature drop of slab limit portion, prevents the generation that the limit is split in the operation of rolling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105913338A CN102125932B (en) | 2010-12-16 | 2010-12-16 | Hot rolling device for magnesium alloy and rolling heating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105913338A CN102125932B (en) | 2010-12-16 | 2010-12-16 | Hot rolling device for magnesium alloy and rolling heating method |
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| CN102125932A true CN102125932A (en) | 2011-07-20 |
| CN102125932B CN102125932B (en) | 2012-11-07 |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102430575A (en) * | 2011-12-08 | 2012-05-02 | 李跃华 | Process and device for flattening W-like arc-shaped magnesium alloy blank plate |
| CN102728615A (en) * | 2012-07-27 | 2012-10-17 | 西部钛业有限责任公司 | Rolling processing method for wide magnesium-alloy sheet |
| CN103028602A (en) * | 2012-10-30 | 2013-04-10 | 鞍钢股份有限公司 | Method for rolling magnesium alloy sheet strip |
| CN103157670A (en) * | 2011-12-16 | 2013-06-19 | 宝山钢铁股份有限公司 | Reducing slab portion temperature dropping hot milling heat holding cover and operating device thereof |
| CN103240281A (en) * | 2013-05-07 | 2013-08-14 | 太原科技大学 | Heat-preservation device of rolled magnesium alloy conveying roller way |
| CN104190723A (en) * | 2014-08-19 | 2014-12-10 | 中国重型机械研究院股份公司 | Magnesium and magnesium alloy plate and strip warm-rolling temperature control system |
| CN105149352A (en) * | 2015-09-30 | 2015-12-16 | 中镁镁业有限公司 | Online temperature supplementing, constant-temperature rolling and coiling method for wrought magnesium alloy sheet strips |
| CN105521996A (en) * | 2016-02-04 | 2016-04-27 | 东北大学 | Hot roller heating and rolling device and method for magnesium alloy strips |
| CN106552823A (en) * | 2015-09-30 | 2017-04-05 | 中镁镁业有限公司 | Deformed Mg and magnesium alloy board constant temperature volume rolling production method |
| CN107262524A (en) * | 2017-05-27 | 2017-10-20 | 舞阳钢铁有限责任公司 | A kind of heating rolling production method of titanium plate |
| CN107470356A (en) * | 2017-08-07 | 2017-12-15 | 上海利正卫星应用技术有限公司 | A set of thin roll bending production equipment of magnesium alloy wide-width |
| CN107838192A (en) * | 2017-11-23 | 2018-03-27 | 鹤山市顺亿达铜业制品有限公司 | A kind of automatic hot-rolling arrangement of copper coin |
| CN107876579A (en) * | 2017-12-06 | 2018-04-06 | 江阴戴勒姆动力设备有限公司 | One kind is around piece ratio-frequency welding feed arrangement |
| CN108213079A (en) * | 2017-12-30 | 2018-06-29 | 金堆城钼业股份有限公司 | A kind of super large-scale thin plate rolling equipment and molybdenum method of rolling sheet |
| CN108471647A (en) * | 2018-03-29 | 2018-08-31 | 苏州雪牛商贸有限公司 | A kind of heating device for magnesium alloy |
| CN109715305A (en) * | 2016-09-16 | 2019-05-03 | Sms集团有限公司 | Moveable insulation trolley in intermetallic composite coating |
| CN110280588A (en) * | 2019-07-11 | 2019-09-27 | 姹や寒 | A kind of copper strips roughing of anti-raw edges |
| CN110978722A (en) * | 2019-11-30 | 2020-04-10 | 江苏远华轻化装备有限公司 | Compression roller mechanism capable of preventing compression roller from deforming |
| CN113546963A (en) * | 2021-08-02 | 2021-10-26 | 宝鸡协力金属材料有限公司 | Finish rolling device and finish rolling method for hot rolling of titanium alloy sheet |
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| US4736608A (en) * | 1984-11-07 | 1988-04-12 | Encomech Engineering Services Limited | Heat retaining means |
| JPH05123731A (en) * | 1991-10-29 | 1993-05-21 | Kawasaki Steel Corp | Heat dissipation preventing method for high temperature steel stock end part |
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Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102430575A (en) * | 2011-12-08 | 2012-05-02 | 李跃华 | Process and device for flattening W-like arc-shaped magnesium alloy blank plate |
| CN102430575B (en) * | 2011-12-08 | 2014-07-02 | 李跃华 | Process and device for flattening W-like arc-shaped magnesium alloy blank plate |
| CN103157670A (en) * | 2011-12-16 | 2013-06-19 | 宝山钢铁股份有限公司 | Reducing slab portion temperature dropping hot milling heat holding cover and operating device thereof |
| CN102728615A (en) * | 2012-07-27 | 2012-10-17 | 西部钛业有限责任公司 | Rolling processing method for wide magnesium-alloy sheet |
| CN102728615B (en) * | 2012-07-27 | 2014-07-02 | 西部钛业有限责任公司 | Rolling processing method for wide magnesium-alloy sheet |
| CN103028602A (en) * | 2012-10-30 | 2013-04-10 | 鞍钢股份有限公司 | Method for rolling magnesium alloy sheet strip |
| CN103028602B (en) * | 2012-10-30 | 2015-10-07 | 鞍钢股份有限公司 | A kind of method of rolling magnesium alloy board |
| CN103240281A (en) * | 2013-05-07 | 2013-08-14 | 太原科技大学 | Heat-preservation device of rolled magnesium alloy conveying roller way |
| CN104190723A (en) * | 2014-08-19 | 2014-12-10 | 中国重型机械研究院股份公司 | Magnesium and magnesium alloy plate and strip warm-rolling temperature control system |
| CN106552823B (en) * | 2015-09-30 | 2018-11-06 | 中镁镁业有限公司 | Deformed Mg and magnesium alloy board constant temperature roll up rolling production method |
| CN105149352A (en) * | 2015-09-30 | 2015-12-16 | 中镁镁业有限公司 | Online temperature supplementing, constant-temperature rolling and coiling method for wrought magnesium alloy sheet strips |
| CN106552823A (en) * | 2015-09-30 | 2017-04-05 | 中镁镁业有限公司 | Deformed Mg and magnesium alloy board constant temperature volume rolling production method |
| CN105521996A (en) * | 2016-02-04 | 2016-04-27 | 东北大学 | Hot roller heating and rolling device and method for magnesium alloy strips |
| CN109715305A (en) * | 2016-09-16 | 2019-05-03 | Sms集团有限公司 | Moveable insulation trolley in intermetallic composite coating |
| CN107262524A (en) * | 2017-05-27 | 2017-10-20 | 舞阳钢铁有限责任公司 | A kind of heating rolling production method of titanium plate |
| CN107470356A (en) * | 2017-08-07 | 2017-12-15 | 上海利正卫星应用技术有限公司 | A set of thin roll bending production equipment of magnesium alloy wide-width |
| CN107838192A (en) * | 2017-11-23 | 2018-03-27 | 鹤山市顺亿达铜业制品有限公司 | A kind of automatic hot-rolling arrangement of copper coin |
| CN107876579A (en) * | 2017-12-06 | 2018-04-06 | 江阴戴勒姆动力设备有限公司 | One kind is around piece ratio-frequency welding feed arrangement |
| CN108213079A (en) * | 2017-12-30 | 2018-06-29 | 金堆城钼业股份有限公司 | A kind of super large-scale thin plate rolling equipment and molybdenum method of rolling sheet |
| CN108471647A (en) * | 2018-03-29 | 2018-08-31 | 苏州雪牛商贸有限公司 | A kind of heating device for magnesium alloy |
| CN110280588A (en) * | 2019-07-11 | 2019-09-27 | 姹や寒 | A kind of copper strips roughing of anti-raw edges |
| CN110978722A (en) * | 2019-11-30 | 2020-04-10 | 江苏远华轻化装备有限公司 | Compression roller mechanism capable of preventing compression roller from deforming |
| CN113546963A (en) * | 2021-08-02 | 2021-10-26 | 宝鸡协力金属材料有限公司 | Finish rolling device and finish rolling method for hot rolling of titanium alloy sheet |
| CN113546963B (en) * | 2021-08-02 | 2023-02-28 | 宝鸡协力金属材料有限公司 | Finish rolling device and finish rolling method for hot rolling of titanium alloy sheet |
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