CN106102939B - The hot-rolling method of high carbon steel - Google Patents
The hot-rolling method of high carbon steel Download PDFInfo
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- CN106102939B CN106102939B CN201580014722.5A CN201580014722A CN106102939B CN 106102939 B CN106102939 B CN 106102939B CN 201580014722 A CN201580014722 A CN 201580014722A CN 106102939 B CN106102939 B CN 106102939B
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- 238000005098 hot rolling Methods 0.000 title claims abstract description 44
- 229910000677 High-carbon steel Inorganic materials 0.000 title claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 92
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 64
- 239000010959 steel Substances 0.000 claims abstract description 64
- 238000005096 rolling process Methods 0.000 claims abstract description 47
- 206010011376 Crepitations Diseases 0.000 abstract description 27
- 238000001816 cooling Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 15
- 210000003491 Skin Anatomy 0.000 description 11
- 238000007254 oxidation reaction Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 239000000284 extract Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000001603 reducing Effects 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 102200082816 HBB S45C Human genes 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000005712 crystallization Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009114 investigational therapy Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
-
- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
- B21B2001/225—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 plates, strips, bands or sheets of indefinite length by hot-rolling
Abstract
Present invention offer is a kind of in the hot rolling of high carbon steel, can prevent from producing the hot-rolling method of steel plate crackle in the cooling procedure after finish rolling.A kind of hot-rolling method of high carbon steel, by the plate of high carbon steel with after the baffle heater heating for the entrance side for being arranged on finishing mill, finish rolling is carried out by the finishing mill, wherein, the heating with baffle heater is carried out in a manner of the heating amount of the end of plate is below predetermined higher limit, here, the heating amount of the end of so-called plate refers to, end, when being heated with baffle heater the temperature of the plate near finishing mill entrance side and temperature difference when not heated with baffle heater.
Description
Technical field
The present invention relates to the hot-rolling method of high carbon steel.More particularly, to by the plate of high carbon steel with being arranged on finishing mill
Entrance side heater (hereinafter referred to as baffle heater) heating after, carry out the hot-rolling method of finish rolling.In addition, this explanation
Described high carbon steel refers to high carbon steel specified in JISG4051, JISG4053, JISG4401, JISG4404 in book, especially
It refers to containing the steel that C is more than 0.2 mass % and below 1.0 mass %.
Background technology
For example, as shown in figure 1, hot rolling production line is typically by heating furnace 1, multiple roughing mills 2, multiple finishing mills 3, cooling zone
Domain 4, coiler device 5 etc. are formed.In addition, the hot rolling production line shown in Fig. 1 is the steel (hot-rolled steel that steel hot rolling is turned into plate shape
Plate) when used hot rolling production line.In addition, in Fig. 1, the quantity of roughing mill is 3, the quantity of finishing mill is 7.
It is that steel billet heating furnace 1 is heated to defined temperature by the raw material (steel raw material) of hot rolling in hot-rolled steel, afterwards,
After plate is made with the execution roughing of roughing mill 2, turn into defined thickness with the rolling of finishing mill 3.Here, until finishing mill 3 bites
Material to be rolled is the time of plate, and plate end is longer than front end.Therefore, steel billet is uniformly heated up in heating furnace 1,
Temperature when finishing mill 3 being bitten to plate, the temperature for using the measurement (indicated by an arrow in Fig. 1) of finishing mill entrance side thermometer 11
For, compared to the front end of plate, this side of end would generally be low.Especially when carrying out the rolling of terminal part of plate, due to
Temperature is reduced and the increase of caused finish rolling load like this, and rolling becomes unstable, and material to be rolled is produced in finishing mill 3
Fracture or material to be rolled produce the unfavorable condition of drawing etc.In addition, the front end of so-called plate refers to the length of plate herein
Spend direction (rolling direction) front end.In addition, the end of so-called plate refers to length direction (rolling direction) rear end of plate.
In order to compensate the reduction of the temperature of the length direction of this plate, to be bitten plate in finishing mill before end side heats
The end side heating of material (is heated hereinafter also referred to as compensation.) for the purpose of, as shown in figure 1, being set between roughing mill 2 and finishing mill 3
It is equipped with baffle heater 10.On the hot rolling production line of baffle heater 10 is provided with, before with the finish rolling plate of finishing mill 3,
It is heated using baffle heater 10, improves the temperature of the end of plate, so that rolling load reduces, so as to stable
Ground is rolled.In addition, on hot rolling production line, in order to implement the pressing of the width of steel billet, the width of steel billet is adjusted, is had
When sizing press is also set between heating furnace 1 and roughing mill 2, or in order to compensate the reduction of the temperature of the width of plate,
Edge part heater is set between roughing mill 2 and finishing mill 3.
Baffle heater 10 or edge part heater are usually to make in the king-sized so-called difficult rolling stock of rolling load
With, not only equally heated as the plate of material to be rolled, and the target of the plate of conveyance position as defined in being predefined in
Temperature, the compensation heating of the plate is carried out, the plate is reached more than the target temperature.
In the hot rolling of high carbon steel, it is also proposed that the hot-rolling method as disclosed in patent document 1.In patent document 1
A kind of hot-rolling method of high carbon steel is recorded, the plate type heating by the plate of high carbon steel with the entrance side for being arranged on finishing mill
After device heating, finish rolling is carried out with the finishing mill, it is characterised in that make a reservation for target of the plate in defined conveyance position
Temperature, carry out the compensation heating of the plate, to reach more than the target temperature, the hot-rolling method of this high carbon steel
Following effect is shown, i.e.,：The steel plate crackle in the too low caused finish rolling of rolling temperature can be prevented, the high-carbon of high quality can be manufactured
Plain steel.
Prior art literature
Patent document
Patent document 1:(Japan) JP 2003-275805 publications
The invention problem to be solved
But it is high carbon steel in the steel as rolling raw material during with existing hot-rolling method hot-rolled steel as described above
In the case of, if plate is heated by baffle heater, sometimes in the cooling zone in the rolling direction downstream for being arranged at finishing mill 3
Domain 4, the material to be rolled after generation finish rolling are the unfavorable condition of steel plate cracking etc (hereinafter also referred to as steel plate crackle.).
The problem of in order to tackle cracking of the steel plate after this finish rolling etc, studied for high carbon steel, i.e. do not make
With baffle heater, but the heating-up temperature (hereinafter referred to as heating furnace extraction temperature) improved in heating furnace makes the rolling of end
Load reduces.But in the case of for high carbon steel, if improving heating-up temperature, it is red oxidization easily to produce surface defect
Skin (scale).Restricted by it, the problem of heating-up temperature that can not improve high carbon steel etc be present, it is difficult to taken into account quality and lead to
Both plates.
The content of the invention
Point in view of the above-mentioned problems of the invention, its object is to, there is provided it is a kind of in the hot rolling of high carbon steel, it can prevent
The hot-rolling method of steel plate crackle in cooling procedure after finish rolling.
For solving the technical scheme of problem
Inventor etc. to using high carbon steel as described above as rolling raw material in the case of, carry out the reason for steel plate cracking
Investigation, as a result finds, in high carbon steel, due to the coarsening of crystal grain can be promoted with the heating of baffle heater,
Steel plate crackle is produced during cooling in cooled region.Particularly in the baffle heater progress using high-frequency induction heating mode
In the case of heating, this unfavorable condition can be produced mostly, and temperature difference is produced on the surface of plate and center, its result thinks,
In skin section and central part, crystallization particle diameter produces larger difference, the reason for turning into above-mentioned unfavorable condition.
Then, for solve the problems, such as it is such carried out various researchs, as a result find, using finishing mill entrance side board-like plus
Hot device is heated and during so that the heating amount of plate being reached more than certain Temperature Quantity, and steel plate crackle will be produced in cooled region.
Also, it was found that when carrying out hot rolling to high carbon steel, as long as setting the upper limit to the heating amount of baffle heater heating, it is possible to realize
Steel plate crackle will not be produced in cooled region, and heating furnace need not be improved and extract temperature out, so will not also produce red oxidization
Manufacture high carbon steel to the quality unfavorable condition such as skin.
When controlling the heating amount of above-mentioned plate, effective method is to control the heating amount of plate end.It is moreover, effective
Method is that the heating amount to plate end carries out various changes in advance, checks in the cooled region located at the downstream of finishing mill
The generation of steel plate crackle is whether there is, the heating amount for the plate end not cracked is set to the upper limit.In addition, in common operation
In the case of middle generation steel plate crackle, will not there is no the plate end of the steel billet of crackle in the steel billet for the same steel grade for carrying out hot rolling simultaneously
The upper limit that the heating amount at end is set to the heating amount of plate end is also effective.
The present invention is completed based on such opinion, and its main points is as follows.
[1] a kind of hot-rolling method of high carbon steel, the plate by the plate of high carbon steel with the entrance side for being arranged at finishing mill
After the heating of formula heater, finish rolling is carried out by the finishing mill, wherein, using the heating amount of the end of plate as predetermined higher limit
Following mode is heated using baffle heater, here, the heating amount of the end of so-called plate refers to, finishing mill entrance side
End, when being heated with baffle heater the temperature of neighbouring plate and when not heated with baffle heater
Temperature difference.
Invention effect
According to the present invention, in carbon steel high using baffle heater hot rolling, can prevent in the cooling procedure after finish rolling
Steel plate crackle generation.Extract the high temperature of temperature out thereby, it is possible to suppress heating furnace, will not cause produce red oxidization skin it
The problem of unfavorable condition in terms of the quality of class, so as to stably manufacture the high carbon steel plate of high quality.
Brief description of the drawings
Fig. 1 is the schematic diagram for representing hot rolling production line；
Fig. 2 is the lengthwise location and finishing mill entrance side temperature of plate when representing not heated with baffle heater
Relation figure；
Fig. 3 is the figure of the relation of the lengthwise location and finishing mill entrance side temperature that represent plate.
Embodiment
For the preferred forms of the present invention, on the hot rolling production line shown in Fig. 1, to carry out by roughing and finish rolling structure
Into hot rolling in case of illustrate.By continuously casting etc. and obtain high carbon steel steel billet, in heating furnace 1 plus
After heat, roughing is carried out with roughing mill 2, the plate of high carbon steel is made.The plate obtained using roughing mill 2, uses plate type heating
Device 10 heats (compensation heating), to compensate the Wen Duxiajiang in finishing mill entrance side.
Finishing mill entrance side when Fig. 2 represents not carry out the heating using baffle heater 10 is (closest to roughing mill
The entrance side of the finishing mill of side) nearby, the schematic diagram of the temperature of the length direction of plate.As described in Figure 2, the end of plate
Compared with front end, the temperature step-down of finishing mill entrance side.In addition, carry out the end and front end of the plate of temperature survey, it is contemplated that
Manufacturing condition or device etc. suitably determine.
In the hot rolling using existing baffle heater 10, the length direction of plate is carried out using baffle heater 10
Compensation heating, makes the temperature of plate heat up.The amount to be heated up with baffle heater 10, required by being reached with the total length of plate
Mode in temperature range suitably determines, stably to carry out finish rolling.Here, as shown in Fig. 2 in plate, the end of plate
Temperature reduce and become maximum, therefore in plate, the compensation heating amount of the end of plate is maximum.
In the present invention, when compensating heating using this existing baffle heater 10, in plate, heating is made
Amount turns into below predetermined higher limit as the heating amount of maximum position, plate end.
Fig. 3 is denoted as one of the hot-rolling method of the present invention, using baffle heater 10 by the length direction of plate
From the lengthwise location L of plateXHeated to the part of plate end, it is when the temperature of plate end is set into Ta (DEG C), smart
Inlet of rolling mill side (closest to the entrance side of the finishing mill of the side of roughing mill) nearby, the temperature of the length direction of plate shows
It is intended to.Here, the heating amount of the plate as baffle heater 10, the temperature for making the end of plate is Ta (DEG C), by LXIt is set to
1/2 position of plate length, from the central portion of the length direction of plate, enter line tilt distribution, from LXTo the plate of end
Temperature be Ta (DEG C) and substantially certain.In addition, in figure 3, table is also carried out to situation about not heated with baffle heater
Show.In this case, the temperature of the end of plate is Tn (DEG C).
In the present invention, when heating plate with baffle heater 10, turn into predetermined with the heating amount of the end of plate
Mode below higher limit carries out the heating (compensation heating) using baffle heater 10.
As schematically shown in Fig. 3, the heating amount of plate end is plate when not heated with baffle heater 10
End temperature Tn (DEG C) and plate when being heated with baffle heater 10 end temperature Ta (DEG C) difference Δ T (DEG C)
(Δ T=Ta-Tn).
In addition, the temperature of plate and the size of plate based on the outlet side position in baffle heater 10 or to finishing mill
Distance, temperature etc., can obtain plate end, temperature Tn when being heated not over baffle heater 10, by board-like
Temperature Ta when heater 10 heats.
Generally, Ta (DEG C) is the temperature measured with finishing mill entrance side thermometer 11.
In addition, generally, Tn (DEG C) is in the case where not heating plate, is measured with finishing mill entrance side thermometer 11
Temperature.Tn (DEG C) can also be set to consider various operating conditions or temperature etc. the measurement temperature is modified after value.Separately
Outside, Tn (DEG C) can also be to consider manufacturing condition or equipment etc. by calculating and the value tried to achieve.
In the present invention, in advance by the heating amount of plate end：Δ T carries out various changes, checks and is located under finishing mill
The cooled region 4 of trip side whether there is the generation of steel plate crackle, it is determined that the higher limit for the Δ T not cracked.Moreover, add with board-like
During hot device heating plate, adding for plate is carried out in a manner of below the higher limit that the heating amount of the end of plate is predetermined Δ T
Heat.
, can be by hot rolling simultaneously in the case of steel plate crackle is generated in common operation in addition to above-mentioned gimmick
Same steel grade steel billet in there is no the plate end of the steel billet of crackle heating amount be defined as Δ T higher limit.
On the other hand, on plate end heating amount lower limit, it may be considered that manufacturing condition or device etc. are appropriate really
It is fixed.
By using this hot-rolling method of the invention, heating can be compensated to plate using baffle heater 10,
The temperature of plate terminal part is heated up, suppress the fracture in finishing mill, and suppress the steel plate crackle in cooled region 4.
In addition, in Fig. 3, use the heating of baffle heater 10 since the length direction central portion of plate, but plate plus
Hot method is not limited to this method.Need to compensate the situation of heating with baffle heater in plate total length, can also be by
Heating amount according to plate end is the mode below Δ T higher limit, is heated in plate total length, or can also be only by plate
The terminal part of material is locally heated by.
In addition, in the method for the invention, the heating amount to plate sets the upper limit.Thus, it is also contemplated that rolling condition
Or the species of plate is different, it is impossible to is warming up to the situation for the degree that can suppress the fracture in finishing mill.In this case, example
Such as, beforehand through plate determined by prediction heating amount fracture of the higher limit in finishing mill or ensure the length of plate
The situation of deficiency in terms of the material in direction, can be by shortening the steel billet length before roughing, shortening plate length in itself, reduce
The temperature reductions of plate terminal part before finish rolling are tackled.
In addition, the mode of heating as baffle heater 10, can apply mode, mode of burner of sensing heating etc.
Various mode of heatings, but as described above, in terms of heating amount is suppressed, it is preferred to use induction heating mode.
In the present invention, the billet heating temperature in heating furnace is not particularly limited, it may be considered that manufacturing condition or device
Determined Deng appropriate.Heating furnace extracts temperature out for example, it can be set to for 1050~1150 DEG C.
Embodiment 1
The high carbon steel of (quality %) is formed (specified in JISG4051 using the composition of the steel mark A shown in table 1
S45C steel billet), hot rolling is carried out on the hot rolling production line shown in Fig. 1.The thickness of used steel billet is 260mm, width is
1150mm, steel billet is heated in heating furnace after the heating furnace shown in table 2 extracts temperature out, with sizing press (not shown)
After being 1065mm by width finishing, roughing is carried out, thickness 40mm, width 1065mm plate is made.The plate of acquisition is at this
In example (rolling numbering 1), the higher limit of the heating amount of the end of plate is set to 40 DEG C, is heated, entered with baffle heater
Row finish rolling.In addition, as a comparison, for (to be rolled beyond the heating amount baffle heater of above-mentioned higher limit in the case of of heating
Make numbering 2), heating furnace is extracted out to high-temperature and without the situation (rolling numbering 3) of baffle heater heating, also progress
Finish rolling.In addition, situation about being heated with baffle heater, as shown in figure 3, from the length direction central portion of plate to terminal part, will
Heating is measured to distribute into line tilt, is heated in a manner of the heating amount in the end of plate reaches the temperature of table 2.In addition, plate
Formula heater uses the heater of high-frequency induction heating mode, in addition, length direction (rolling side of the end of plate away from plate
To) rear end is 3m (the plate total length after roughing is 60m).
The temperature of the steel plate with the measurement (indicated by an arrow in Fig. 1) of finishing mill outlet side thermometer 12 is represented in table 2.With essence
After plate is rolled into hot rolled steel plate by milling train, cooled down in cooled region, and wound with coiler device.In addition, finish rolling is good
The thickness of steel plate is 3.25mm, and the width after finish rolling is 1065mm, and coiling temperature is 670 DEG C.The result of hot rolling is shown in table 2.
In example (rolling numbering 1) of the present invention, it can not make to carry out hot rolling with producing steel plate crackle in cooled region, and do not have
The generation of red oxidization skin, the steel plate of high quality can be manufactured.On the other hand, it is too high and beyond the scope of this invention in heating amount
Comparative example (rolling numbering 2) in, generate steel plate crackle in cooled region.In addition, without adding with baffle heater
In comparative example (rolling numbering 3) that is hot but making heating-up temperature itself high temperature in heating furnace, although not causing cooled region
In steel plate crackle generation, but generate red oxidization skin.
Lead to plate on winding production line and visually inspected and produced to determine whether steel plate crackle.By steel plate width direction
The edge part situation that has crackle more than length 10mm be judged as there is steel plate crackle, will same edge part do not have length 10mm with
On the situation of crackle be judged as no steel plate crackle.After embodiment 2, determine whether steel plate also according to same benchmark and split
Line.
[table 1]
* remainder be Fe and JIS specified in the range of impurity.
[table 2]
Embodiment 2
Based on the result of above-described embodiment 1, the higher limit of the heating amount of the end of plate is set to 40 DEG C.To steel mark A
6 steel billets 6, in addition to the higher limit of the heating amount of the end of plate to be changed to 40 DEG C (repeatedly implement), 35 DEG C of this point,
With above-described embodiment 1 it is same under conditions of carry out hot rolling (rolling numbering 4~9).Show the result in table 3.
As a result, either which situation, can not make cooled region carry out hot rolling with producing steel plate crackle, also not have
There is the generation of red oxidization skin, the steel plate of high quality can be manufactured.As known from the above, the liter of the end of prespecified plate is passed through
The higher limit of temperature amount, would not cause red oxidization skin produce as unfavorable condition in terms of quality the problem of, can stablize
Ground manufactures the high carbon steel plate of high quality.
[table 3]
Embodiment 3
The high carbon steel of (quality %) is formed (specified in JISG4051 using the composition of steel mark B~E shown in table 4
S45C steel billet), the higher limit of the heating amount of the end of plate is set to 50 DEG C, 40 DEG C and 35 DEG C, in addition, with it is above-mentioned
Hot rolling is carried out under conditions of embodiment 1 is same.The result of hot rolling is shown in table 5.
The higher limit of the heating amount of the end of plate is set as 40 DEG C and 35 DEG C of example of the present invention (rolling numbering 10~14)
In, cooled region can not be made to carry out hot rolling with producing steel plate crackle, also without the generation of red oxidization skin, can be manufactured high-quality
The steel plate of amount.On the other hand, in the too high and beyond the scope of this invention comparative example of heating amount (rolling numbering 15), cooling down
Region generates steel plate crackle.
[table 4]
* remainder be Fe and JIS specified in the range of impurity.
[table 5]
Embodiment 4
Based on the result of above-described embodiment 1, the heating amount of the end of plate is set to higher limit i.e. 40 DEG C.In addition, with from
The length direction 1/3 of plate is to terminal part (rolling numbering 16), from the length direction 2/3 of plate, to terminal part, (rolling is compiled
Number 17) enter the mode that line tilt is distributed and heated respectively, change the heating location of baffle heater, in addition to this point, with
Hot rolling is carried out under conditions of above-described embodiment 1 is same.
As a result, no matter in the case of which, cooled region can not be made to carry out hot rolling with producing steel plate crackle,
There is no the generation of red oxidization skin, the steel plate of high quality can be manufactured.As known from the above, the end of prespecified plate is passed through
The higher limit of heating amount, would not cause red oxidization skin produce as unfavorable condition in terms of quality the problem of, Neng Gouwen
Surely the high carbon steel plate of high quality is manufactured.
[table 6]
Symbol description
1 heating furnace
2 roughing mills
3 finishing mills
4 cooled regions
5 coiler devices
10 baffle heaters
11 finishing mill entrance side thermometers
12 finishing mill outlet side thermometers
Claims (1)
1. a kind of hot-rolling method of high carbon steel, the plate type heating by the plate of high carbon steel with the entrance side for being arranged on finishing mill
After device is heated, finish rolling is carried out by the finishing mill, wherein,
Do not cracked using the heating amount of the end of plate as the steel plate in the cooled region in the downstream of finishing mill pre-
Mode below fixed higher limit carries out the heating with baffle heater, here, the heating amount of the end of so-called plate refers to, essence
End, when being heated with baffle heater the temperature of plate near inlet of rolling mill side and when not heated with baffle heater
Temperature difference.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014056082 | 2014-03-19 | ||
| JP2014-056082 | 2014-03-19 | ||
| PCT/JP2015/001069 WO2015141154A1 (en) | 2014-03-19 | 2015-02-27 | High carbon steel hot rolling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106102939A CN106102939A (en) | 2016-11-09 |
| CN106102939B true CN106102939B (en) | 2018-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201580014722.5A Active CN106102939B (en) | 2014-03-19 | 2015-02-27 | The hot-rolling method of high carbon steel |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP5854177B1 (en) |
| KR (1) | KR101898568B1 (en) |
| CN (1) | CN106102939B (en) |
| TW (1) | TWI535859B (en) |
| WO (1) | WO2015141154A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5530338A (en) * | 1978-08-25 | 1980-03-04 | Hitachi Ltd | Temperature control method of steel material in hot rolling mill |
| CN1277568A (en) * | 1998-09-08 | 2000-12-20 | 川崎重工业株式会社 | Sheet hot rolling mill |
| JP2003275805A (en) * | 2002-03-20 | 2003-09-30 | Jfe Steel Kk | Method for hot-rolling high carbon steel |
| WO2007111080A1 (en) * | 2006-03-28 | 2007-10-04 | Jfe Steel Corporation | Hot-rolled ultrasoft high-carbon steel plate and process for production thereof |
| CN101081406A (en) * | 2006-05-30 | 2007-12-05 | 宝山钢铁股份有限公司 | Method for ensuring the temperature of the full-length of the hot fine rolling band steel |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006239777A (en) * | 1997-10-07 | 2006-09-14 | Jfe Steel Kk | Method for manufacturing hot-rolled steel sheet |
| JP4165243B2 (en) * | 2003-02-05 | 2008-10-15 | 住友金属工業株式会社 | Method for controlling meandering of rolled material and method for producing hot rolled steel sheet |
| WO2012036483A2 (en) * | 2010-09-16 | 2012-03-22 | 주식회사 포스코 | High-carbon hot-rolled steel sheet, cold-rolled steel sheet and a production method therefor |
-
2015
- 2015-02-27 WO PCT/JP2015/001069 patent/WO2015141154A1/en active Application Filing
- 2015-02-27 KR KR1020167028649A patent/KR101898568B1/en active IP Right Grant
- 2015-02-27 CN CN201580014722.5A patent/CN106102939B/en active Active
- 2015-02-27 JP JP2015529744A patent/JP5854177B1/en active Active
- 2015-03-19 TW TW104108746A patent/TWI535859B/en active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5530338A (en) * | 1978-08-25 | 1980-03-04 | Hitachi Ltd | Temperature control method of steel material in hot rolling mill |
| CN1277568A (en) * | 1998-09-08 | 2000-12-20 | 川崎重工业株式会社 | Sheet hot rolling mill |
| JP2003275805A (en) * | 2002-03-20 | 2003-09-30 | Jfe Steel Kk | Method for hot-rolling high carbon steel |
| WO2007111080A1 (en) * | 2006-03-28 | 2007-10-04 | Jfe Steel Corporation | Hot-rolled ultrasoft high-carbon steel plate and process for production thereof |
| CN101081406A (en) * | 2006-05-30 | 2007-12-05 | 宝山钢铁股份有限公司 | Method for ensuring the temperature of the full-length of the hot fine rolling band steel |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201542836A (en) | 2015-11-16 |
| TWI535859B (en) | 2016-06-01 |
| JPWO2015141154A1 (en) | 2017-04-06 |
| CN106102939A (en) | 2016-11-09 |
| KR20160133537A (en) | 2016-11-22 |
| JP5854177B1 (en) | 2016-02-09 |
| WO2015141154A1 (en) | 2015-09-24 |
| KR101898568B1 (en) | 2018-09-13 |
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