CN107537857A - A kind of ferrite rolling method - Google Patents
A kind of ferrite rolling method Download PDFInfo
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- CN107537857A CN107537857A CN201710556986.4A CN201710556986A CN107537857A CN 107537857 A CN107537857 A CN 107537857A CN 201710556986 A CN201710556986 A CN 201710556986A CN 107537857 A CN107537857 A CN 107537857A
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- strip
- slab
- finish rolling
- dephosphorization
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Abstract
The present invention relates to hot rolling technique field, more particularly to a kind of ferrite rolling method, methods described to include：Slab to be rolled is heated in heating furnace, the heat time for controlling the slab is 180 200min, tapping temperature is 1,080 1120 DEG C；Roughing is carried out to the slab after heating, obtains strip；Finish rolling is carried out to the strip in ferrite area.The application before ferrite area finish rolling is carried out to slab by heating, it is 180 200min to control the heat time, it is 1,080 1120 DEG C to control tapping temperature simultaneously, a group bundle is carried out to the slab after the completion of heating and obtains strip, finish rolling is carried out to slab in ferrite area again, the problem of hot rolling strip steel scale defect can be improved, improve the surface quality of strip.
Description
Technical field
The present invention relates to hot rolling technique field, more particularly to a kind of ferrite rolling method.
Background technology
In the ferrite rolling technology of hot-rolled process, carried out using strip in the less feature of ferrite rolling drag
Zerolling, the finish rolling area operation of rolling are carried out in ferrite area, then use higher coiling temperature coarse grained to obtain
Ferritic structure, so as to reduce the intensity of hot-strip, and significantly improve plasticity and forming property.
However, obtaining strip using existing ferrite rolling method easily there is scale defect, so as to influence band
Steel quality.
The content of the invention
In view of the above problems, it is proposed that the present invention so as to provide one kind overcome above mentioned problem or at least in part solve on
State the ferrite rolling method of problem.
The embodiment of the present invention provides a kind of ferrite rolling method, and methods described includes：
Slab to be rolled is heated in heating furnace, control heat time of the slab for 180-200min,
Tapping temperature is 1080-1120 DEG C；
Roughing is carried out to the slab after heating, obtains strip；
Finish rolling is carried out to the strip in ferrite area.
Preferably, the heating furnace from entrance to outlet sequentially include preheating section, the first bringing-up section, the second bringing-up section and
Hot arc, the coefficient of excess air of first bringing-up section is 0.9-1.0, and the coefficient of excess air of second bringing-up section is 0.9-
0.95, the coefficient of excess air of the soaking zone is 0.8-0.9.
Preferably, it is described slab to be rolled is heated in heating furnace after, and described pair heating after
Before the slab carries out roughing, methods described also includes：
Thick dephosphorization and roughing dephosphorization is sequentially carried out to the slab after heating.
Preferably, during the roughing dephosphorization, dephosphorization passage is more than or equal to 4.
Preferably, described pair heating after the slab carry out roughing after, and it is described in ferrite area to described
Before strip carries out finish rolling, methods described also includes：
Finish rolling dephosphorization is carried out to the strip.
Preferably, during the finish rolling dephosphorization, dephosphorization pressure is more than or equal to 20Mpa.
Preferably, after the slab after described pair of heating carries out roughing, and essence is carried out to the strip described
Before rolling dephosphorization, methods described also includes：
The strip is incubated.
Preferably, it is described ferrite area to the strip carry out finish rolling after, methods described also includes：
Section cooling is carried out to the strip.
Preferably, during carrying out finish rolling to the strip in ferrite area, upper machine roll surface roughness is 0.5-
2.0um。
Preferably, during carrying out finish rolling to the strip in ferrite area, open waterproof and peel off pressure, pressure is big
In or equal to 0.4Mpa.
One or more of embodiment of the present invention technical scheme, has at least the following technical effects or advantages：
For the application by being heated before ferrite area finish rolling is carried out to slab, it is 180- to control the heat time
200min, while it is 1080-1120 DEG C to control tapping temperature, carries out a group bundle to the slab after the completion of heating and obtains strip, then
The problem of finish rolling is carried out to slab, hot rolling strip steel scale defect can be improved in ferrite area, improve the surface matter of strip
Amount.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole accompanying drawing, identical part is represented with identical reference pattern.In the accompanying drawings：
Fig. 1 shows a kind of ferrite rolling method in the embodiment of the present invention.
Embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although the disclosure is shown in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
Limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Completely it is communicated to those skilled in the art.
The embodiment of the present invention provides a kind of ferrite rolling method, suitable for carbon aluminium-killed steel and ultra-low-carbon steel, such as Fig. 1
Shown, methods described includes：
Step 101：Slab to be rolled is heated in heating furnace, the heat time for controlling the slab is 180-
200min, tapping temperature are 1080-1120 DEG C；
Step 102：Roughing is carried out to the slab after heating, obtains strip；
Step 103：Finish rolling is carried out to the strip in ferrite area.
For the application by being heated before ferrite area finish rolling is carried out to slab, it is 180- to control the heat time
200min, while it is 1080-1120 DEG C to control tapping temperature, carries out a group bundle to the slab after the completion of heating and obtains strip, then
The problem of finish rolling is carried out to slab, hot rolling strip steel scale defect can be improved in ferrite area, improve the surface matter of strip
Amount.
For heating furnace, the entrance of usual self-heating stove sequentially includes preheating section, the first bringing-up section, second to outlet
Bringing-up section and soaking zone, preheating section and soaking zone account for the 20% of body of heater length, and the first bringing-up section and the second bringing-up section account for body of heater
Long 30%.In a kind of preferred embodiment of the application, the coefficient of excess air for controlling the first bringing-up section is 0.9-
1.0th, the coefficient of excess air of the second bringing-up section be 0.9-0.95, the coefficient of excess air of soaking zone be 0.8-0.9, so as to, lead to
The surface quality of the strip finally given can further be improved by crossing above-mentioned control method.
In a preferred embodiment, it is described slab to be rolled is heated in heating furnace after, and
Before the slab after described pair of heating carries out roughing, methods described also includes：The slab after heating is sequentially entered
The thick dephosphorization of row and roughing dephosphorization.Wherein, during the roughing dephosphorization, dephosphorization passage is more than or equal to 4, in the essence
During rolling dephosphorization, using double or three exclusion phosphorus modes, dephosphorization pressure is more than or equal to 20Mpa, so as to pass through above-mentioned place
Reason process can further improve the surface quality of the strip finally given.In addition, the slab after described pair of heating enters
After row roughing, and before the progress finish rolling dephosphorization to the strip, methods described also includes：The strip is protected
Temperature.
In a preferred embodiment, it is described ferrite area to the strip carry out finish rolling after, the side
Method also includes：Section cooling is carried out to the strip, by section cooling can fast speed belt walk the heat of strip, cooling effect
It is good.
In a preferred embodiment, during carrying out finish rolling to the strip in ferrite area, upper machine roll
Roll surface roughness is 0.5-2.0um, opens waterproof and peels off pressure, pressure is more than or equal to 0.4Mpa.
The ferrite rolling method of the application is described in detail with reference to two specific embodiments：
Embodiment one
It is related to steel grade SDC03, specification 5.0*1358mm, wherein steel grade composition such as table 1 below.
Table 1
The operation of rolling：Heating furnace time inside furnace 187min, 1108 DEG C of tapping temperature, the first bringing-up section air mistake in heating furnace
Surplus coefficient 0.93, the second bringing-up section coefficient of excess air 0.92, soaking zone coefficient of excess air 0.86.Go out de-scaling pressure after heating furnace
Power 20.2Mpa, roughing roll 8 passages altogether, and preceding 6 passage de-scalings, the last non-de-scaling of 2 passage, finish rolling de-scaling is double, and pressure is
20.3Mpa, finish rolling F1-F4 are high-speed steel roll, and upper machine roughness is respectively 0.35,0.37,0.41 and 0.46, put into F1-F4
Anti- peeling water, pressure 0.39Mpa.Belt steel surface non-oxidation iron sheet defect.
Embodiment two：
It is related to steel grade SDC04, specification 4.5*1228mm, wherein steel grade composition such as table 2 below.
Table 2
Milling method：Heating furnace time inside furnace 197min, 1100 DEG C of tapping temperature, the first bringing-up section air mistake in heating furnace
Surplus coefficient 0.97, the second bringing-up section coefficient of excess air 0.94, soaking zone coefficient of excess air 0.88.Go out de-scaling pressure after heating furnace
Power 20.4Mpa, roughing roll 8 passages altogether, and preceding 5 passage de-scalings, the last non-de-scaling of 3 passage, finish rolling de-scaling is double, and pressure is
20.1Mpa, finish rolling F1-F4 are high-speed steel roll, and upper machine roughness is respectively 0.92,0.77,1.32 and 0.89, put into F1-F4
Anti- peeling water, pressure 0.38Mpa.Belt steel surface non-oxidation iron sheet defect.
Technical scheme in above-mentioned the embodiment of the present application, at least has the following technical effect that or advantage：
For the application by being heated before ferrite area finish rolling is carried out to slab, it is 180- to control the heat time
200min, while it is 1080-1120 DEG C to control tapping temperature, carries out a group bundle to the slab after the completion of heating and obtains strip, then
The problem of finish rolling is carried out to slab, hot rolling strip steel scale defect can be improved in ferrite area, improve the surface matter of strip
Amount.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (10)
- A kind of 1. ferrite rolling method, it is characterised in that methods described includes：Slab to be rolled is heated in heating furnace, the heat time for controlling the slab is 180-200min, tapped Temperature is 1080-1120 DEG C；Roughing is carried out to the slab after heating, obtains strip；Finish rolling is carried out to the strip in ferrite area.
- 2. the method as described in claim 1, it is characterised in that the heating furnace from entrance to outlet sequentially include preheating section, First bringing-up section, the second bringing-up section and soaking zone, the coefficient of excess air of first bringing-up section are 0.9-1.0, described second The coefficient of excess air of bringing-up section is 0.9-0.95, and the coefficient of excess air of the soaking zone is 0.8-0.9.
- 3. the method as described in claim 1, it is characterised in that heated described in heating furnace to slab to be rolled Afterwards, before the slab and after described pair of heating carries out roughing, methods described also includes：Thick dephosphorization and roughing dephosphorization is sequentially carried out to the slab after heating.
- 4. method as claimed in claim 3, it is characterised in that during the roughing dephosphorization, dephosphorization passage be more than or Equal to 4.
- 5. the method as described in claim 1, it is characterised in that after the slab after described pair of heating carries out roughing, And described before ferrite area carries out finish rolling to the strip, methods described also includes：Finish rolling dephosphorization is carried out to the strip.
- 6. method as claimed in claim 5, it is characterised in that during the finish rolling dephosphorization, dephosphorization pressure be more than or Equal to 20Mpa.
- 7. method as claimed in claim 5, it is characterised in that after the slab after described pair of heating carries out roughing, And before the progress finish rolling dephosphorization to the strip, methods described also includes：The strip is incubated.
- 8. the method as described in claim 1, it is characterised in that it is described ferrite area to the strip carry out finish rolling it Afterwards, methods described also includes：Section cooling is carried out to the strip.
- 9. the method as described in claim 1, it is characterised in that during carrying out finish rolling to the strip in ferrite area, Upper machine roll surface roughness is 0.5-2.0um.
- 10. the method as described in claim 1, it is characterised in that during carrying out finish rolling to the strip in ferrite area, Open waterproof and peel off pressure, pressure is more than or equal to 0.4Mpa.
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| CN201710556986.4A CN107537857A (en) | 2017-07-10 | 2017-07-10 | A kind of ferrite rolling method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112813347A (en) * | 2020-12-30 | 2021-05-18 | 广西柳钢华创科技研发有限公司 | Ferrite rolling production method of high-r-value low-carbon aluminum killed steel |
| CN112845594A (en) * | 2020-12-28 | 2021-05-28 | 浦项(张家港)不锈钢股份有限公司 | Hot rolling production process of low-hardness ferrite stainless steel |
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| WO1997046332A1 (en) * | 1996-06-07 | 1997-12-11 | Hoogovens Staal B.V. | Method and apparatus for the manufacture of a steel strip |
| CN101008043A (en) * | 2006-01-27 | 2007-08-01 | 宝山钢铁股份有限公司 | Process for producing ferritic stainless steel |
| CN101618396A (en) * | 2008-06-30 | 2010-01-06 | 上海梅山钢铁股份有限公司 | Method for rolling interstitial free steel ferrite on traditional hot rolling mills |
| CN105921515A (en) * | 2016-05-20 | 2016-09-07 | 首钢总公司 | Descaling method for hot-rolled high-strength steel automobile plate |
| CN106311745A (en) * | 2016-08-29 | 2017-01-11 | 首钢京唐钢铁联合有限责任公司 | Hot-rolling method used for reducing red rust on surface of hot-rolled strip steel |
| CN106694567A (en) * | 2016-11-22 | 2017-05-24 | 首钢京唐钢铁联合有限责任公司 | Heating method for IF steel in ferrite rolling |
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2017
- 2017-07-10 CN CN201710556986.4A patent/CN107537857A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997046332A1 (en) * | 1996-06-07 | 1997-12-11 | Hoogovens Staal B.V. | Method and apparatus for the manufacture of a steel strip |
| CN101008043A (en) * | 2006-01-27 | 2007-08-01 | 宝山钢铁股份有限公司 | Process for producing ferritic stainless steel |
| CN101618396A (en) * | 2008-06-30 | 2010-01-06 | 上海梅山钢铁股份有限公司 | Method for rolling interstitial free steel ferrite on traditional hot rolling mills |
| CN105921515A (en) * | 2016-05-20 | 2016-09-07 | 首钢总公司 | Descaling method for hot-rolled high-strength steel automobile plate |
| CN106311745A (en) * | 2016-08-29 | 2017-01-11 | 首钢京唐钢铁联合有限责任公司 | Hot-rolling method used for reducing red rust on surface of hot-rolled strip steel |
| CN106694567A (en) * | 2016-11-22 | 2017-05-24 | 首钢京唐钢铁联合有限责任公司 | Heating method for IF steel in ferrite rolling |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112845594A (en) * | 2020-12-28 | 2021-05-28 | 浦项(张家港)不锈钢股份有限公司 | Hot rolling production process of low-hardness ferrite stainless steel |
| CN112813347A (en) * | 2020-12-30 | 2021-05-18 | 广西柳钢华创科技研发有限公司 | Ferrite rolling production method of high-r-value low-carbon aluminum killed steel |
| CN112813347B (en) * | 2020-12-30 | 2022-03-01 | 广西柳钢华创科技研发有限公司 | Ferrite rolling production method of high-r-value low-carbon aluminum killed steel |
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