CN110153199A - A kind of controlled rolling method of large scale rod bar - Google Patents
A kind of controlled rolling method of large scale rod bar Download PDFInfo
- Publication number
- CN110153199A CN110153199A CN201910420037.2A CN201910420037A CN110153199A CN 110153199 A CN110153199 A CN 110153199A CN 201910420037 A CN201910420037 A CN 201910420037A CN 110153199 A CN110153199 A CN 110153199A
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- China
- Prior art keywords
- rolling
- intermediate base
- cooling
- roller bed
- cooling roller
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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
- 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
- B21B37/76—Cooling control on the run-out table
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a kind of controlled rolling methods of finished diameter φ 70- φ 200mm large scale rod bar, belong to steel rolling field.In addition the controlled rolling equipment that the present invention uses is provided with cooling roller bed in the normal operation of rolling, specific milling step are as follows: milling train rolls rear intermediate base and removes from rolling line roller-way, it is moved back and forth on cooling roller bed and air-cooled, it is returned after intermediate base arrival predetermined temperature and is placed in rolling line roller-way, after cutting head, controlled rolling is carried out to intermediate base with subsequent milling train.This method solve length of intermediate base temperature drop time, Rolling Production low efficiency and the uncontrollable problems of bar high temperature austenitic body tissue during the controlled rolling of large scale rod bar.Implement intermediate base it is air-cooled after, remove low temperature head with cutting head shearing, prevent intermediate base from biting difficult and the accidents such as rolling card etc. and roll.Intermediate base is inside and outside to form certain temperature gradient in process air cooler, after rolling, can promote the deformation of rolled piece center portion, the loose of rolled bar material central area is greatly lowered.
Description
Technical field
The invention belongs to materials processing engineering fields, and in particular to a kind of controlled rolling method of large scale rod bar.
Background technique
With the development in market, the demand of the Bar Wire Product product of high-quality is also growing.The country is by 50mm or more specification
Bar be known as large scale rod bar, large scale rod bar is widely used in vapour mainly for the production of automobile shafts class, pipe class product
The industries such as vehicle, machinery, military project.In many Rolling Productions, large scale rod bar rolling is a kind of rolling work of manufactured parts blank
Skill technology can produce non-hardened and tempered steel, bearing steel, pipeline steel, bullet Huang steel etc., have high production efficiency, remarkable in economical benefits etc.
Feature.
In actual production, compared with small-sized bar Rolling Production, large scale rod bar rolls the section ruler due to rolled piece
It is very little big, cause temperature drop process slow, internal-external temperature difference is big, and when rolling easily causes deformation to be unevenly distributed, and microstructure is unevenly distributed,
In turn result in the difference of mechanical property on entire bar section.
Japan Patent JP2011200878 discloses a kind of method of rolled bar material, can manufacture 80~200mm's of diameter phi
Bar.Sufficient distance is arranged between roughing and finish rolling and cooling zone is set, and provides cooling treatment appropriate to intermediate base.It is intermediate
Along rolling direction front-rear reciprocation movement, cooling is independently carried out for cooling zone of the base between roughing and mm finishing mill unit, can not be with
The operation of rolling is synchronous.But this method uses cooling water, misting cooling, can generate shadow to the temperature uniformity after cooling of bar
It rings.It is required that the arrangement interval between roughing mill and finishing mill should be at least three times of length of rolled piece, and can only be cooling by root, it is right
Rhythm of production can have an impact.
Patent CN106964655A discloses base cooling means and cooling device, metal temperature measurer among a kind of hot-strip
Temperature and mill inlet temperature that intermediate base is located at roughing mill outlet are detected, is controlled in right amount by computing module calculated result cold
But collector group opens or closes, and this method and device can reduce the alloying component and cost of strip, improves production efficiency and production
Moral character energy.But the realization of this method needs more control cold water pipe and needs processing remains in the product on base surface among strip
Water needs more controlled cooling devices and installation space for base among large scale rod bar, and device is complicated, and temperature control effect is poor.
Patent CN107185968A proposes a kind of excellent special steel bar controlled rolling and controlled cooling method.It is Φ 12- suitable for specification
70mm medium format bar, cooling, the temperature recovery cycles control technique using interruption.The invention is meeting bar mechanical performance base
On plinth, solve the problems, such as that relatively deep quenching layer occurs in surface layer in traditional controlled rolling control technique, effectively prevents surface layer quenching geneva
Body tissue occurs, while ensure that surface layer and the preferable uniformity of center portion temperature.But the large scale rod bar above for ф 70mm comes
It says, sectional dimension is larger, and process of rising again in this method is slow, and cooling, cycle period of rising again are long, especially when size is larger, the party
Method may be not suitable for.
Patent CN103551403A proposes bar controlled rolling and controlled cooling system, by transverse-moving trolley, sensor module and in
It entreats control unit to control multiple cooling sections and realizes the cold process of control, effectively improve the performance of rod product.But the cooling system
It is required that multistage control is cold, when being applied to large scale rod bar production, most coolers need to be closed to control cooling rate, centre cannot be taken into account
Base section is cooling uniformly, cannot also obtain uniform formation.
Patent CN207770480U be directed to big rod hot rolling after temperature control it is improper, cause bar center portion generate " white point ",
Implosion, face crack and crack on end side and other issues propose a kind of online annealing device of special steel big rod, by sensor,
The inlet of the structure controls cooling air such as shutter realizes that steel roll the temperature automatic control of rear slow cooling, to guarantee special steel
Internal and surface quality.But the On-line Control cooling device can only once handle single rolled piece, production efficiency is lower, Duo Genleng
But it will lead to the even problem of inhomogeneous cooling.
Patent CN106636591A proposes a kind of controlled rolling and controlled cooling method of big specification high-carbon-chromium bearing steel, before finish rolling
The production technology that the air-cooled rolled piece classification water cooling single after finish rolling of more rolled pieces combines realizes that larger specification bearing steel reaches drop
The effect of low net carbide rank.But more rolled pieces are air-cooled simultaneously without ensureing that cooling is uniformly arranged before the technique finish rolling
It applies, it is uneven still to will lead to deformation in finishing stands.In addition, only demonstrating the suitable of high-carbon-chromium bearing steel in this method example
With property, other steel grades are not necessarily applicable in.
Patent CN108246801A provides a kind of big specification non-hardened and tempered steel rolling equipment and its rolling production method, passes through control
Warm-rolling system, the finishing temperature of the big specification non-hardened and tempered steel bar of stability contorting realize low-temperature deformation, crystal grain are refined, to make to advise greatly
While guaranteeing high-intensitive, modeling, toughness significantly improve lattice non-hardened and tempered steel；By intervening control cooling after rolling, obtain stable
Metallographic structure and comprehensive mechanical property.But this method requires maximum to reduce 40% mill speed, and production efficiency is low.
Summary of the invention
The object of the present invention is to provide a kind of controlled rolling methods of large scale rod bar, keep rolled piece uniformly cooling to have
Uniform temperature field enters back into milling train and is rolled to reduce structural heterogenity, improves rolling quality.
A kind of large scale rod bar controlled rolling method, it is characterised in that controlled rolling equipment in the normal operation of rolling in addition
Provided with cooling roller bed, specific milling step are as follows: milling train rolls rear intermediate base and removes from rolling line roller-way, back and forth transports on cooling roller bed
It is dynamic and air-cooled, it is returned after intermediate base arrival predetermined temperature and is placed in rolling line roller-way, after cutting head, with subsequent milling train to intermediate base
Carry out controlled rolling.
Further, the controlled rolling equipment is mainly by rolling line roller-way, stepping mobile mechanism, cooling roller bed, traversing time
Set mechanism composition；Rolling line roller-way and cooling roller bed are simultaneously not connected with, and are respectively worked independently；After roughing cogging, by intermediate base send to
Rolling line roller-way region between roughing mill and finishing mill, after stopping, intermediate base transfers out rolling line roller-way by stepping mobile mechanism, puts
It sets on cooling roller bed, cooling roller bed moves reciprocatingly, and after intermediate base is cooled to predetermined temperature, is returned and is placed in by traversing Hui Zhi mechanism
Rolling line roller-way.
Further, intermediate base is removed from rolling line roller-way after milling train rolls, and is moved back and forth on cooling roller bed, intermediate base can be equal
Even air-cooled, the transition that can be reduced intermediate base and cooling roller bed contact zone is cooling, prevents cooling roller bed from bending because of temperature unevenness.
Further, more intermediate bases can be placed on the cooling roller bed, and are equally spaced on cooling roller bed, mentioned
High efficiency.
The present invention provides one kind to be concisely and efficiently large scale rod bar controlled rolling method, i.e., intermediate by shifting from rolling line
It is preceding uniformly cooling to realize that intermediate base rolls, then again returns intermediate base and sets rolling line, in topping low-temperature space to cooling roller bed for base
Afterwards, then the controlled rolling imitated, rolled piece performance is improved.
There are following advantages for method provided by the invention:
1) controlled rolling can be realized in traditional large scale rod bar production line；
2) using after new method, implementation controlled rolling nor affects on production, increases substantially the controlled rolling effect of big rod
Rate；
3) implement intermediate base it is air-cooled after, remove low temperature head with cutting head shearing, prevent intermediate base from biting difficult and rolling card etc.
The accidents such as rolling.
4) intermediate base is inside and outside forms certain temperature gradient in process air cooler, after rolling, can promote the rolled piece heart
Portion's deformation, is greatly lowered the loose of rolled bar material central area.
Detailed description of the invention
Fig. 1 large scale rod bar semicontinuous rolling line and the cooling arrangement of intermediate base
In figure: 6- milling train；Base cooled region among 7-；8- cutting head is cut；The subsequent rolling unit of 9-
Fig. 2 is that controlled rolling rolls intermediate base and removes and return from rolling line and sets signal
In figure: base among 1-；2- rolling line roller-way；3- shift-out mechanism；4- cooling roller bed；The traversing Hui Zhi mechanism of 5-
Specific embodiment
Now in conjunction with attached drawing 2, the present invention is described further.
Embodiment 1:
Controlled rolling bar specification is φ 70mm, and the intermediate base of use is having a size of 128*176mm.
After 6 cogging of roughing, the intermediate base having a size of 128*176mm is sent to the rolling line roller between roughing mill 6 and finishing mill 9
Road region, after stopping, intermediate base 1 transfers out rolling line roller-way 2 by stepping mobile mechanism 3, is placed on cooling roller bed 4, rolling line roller
Road 2 and cooling roller bed 4 are simultaneously not connected with, and are respectively worked independently.Cooling roller bed 4 moves reciprocatingly, and reduces intermediate base and chill roll
The transition of road contact zone is cooling, prevents cooling roller bed 4 from bending because of temperature unevenness.It is extensible more according to above-mentioned steps
Intermediate base 1, and be equally spaced on cooling roller bed 4.Roughing mill 6 rolls out the rolling cycle of base among a 128*176mm
It is 120s, rolling rear blank temperature is 1080 DEG C, and base moves 860 ± 15 DEG C of rolling temperature control among 128*176mm, the required time
It is 340-390s, therefore the intermediate base quantity placed in cooling roller bed is 3.4th intermediate base 1 removes the same of rolling line roller-way 2
When, traversing Hui Zhi mechanism 5 from cooling roller bed will after the 1st intermediate base extract, be moved horizontally to above rolling line roller-way 2, will in
Between base be placed on rolling line roller-way 2, then traversing Hui Zhi mechanism 5 returns to next position for needing to take intermediate base.Intermediate base 1 passes through
Rolling line roller-way 2 is delivered to the position that cutting head in Fig. 1 cuts 8, intermediate base cerebral cryotherapy area is cut off, then be sent to milling train 9 and controlled
Rolling.Due to reducing final rolling temperature, the grain size of the finished product bar after rolling is improved by 5 grades of not controlled rolling to 7 grades.Using
After controlled rolling, the production efficiency of φ 70mm scale rod bar is reduced less than 10%.
Embodiment 2
Controlled rolling bar specification is φ 180mm, and the intermediate base of use is having a size of 235*252mm.
After 6 cogging of roughing, the intermediate base having a size of 235*252mm is sent to the rolling line roller between roughing mill 6 and finishing mill 9
Road region, after stopping, intermediate base 1 transfers out rolling line roller-way 2 by stepping mobile mechanism 3, is placed on cooling roller bed 4, rolling line roller
Road 2 and cooling roller bed 4 are simultaneously not connected with, and are respectively worked independently.Cooling roller bed 4 moves reciprocatingly, and reduces intermediate base and chill roll
The transition of road contact zone is cooling, prevents cooling roller bed 4 from bending because of temperature unevenness.It is extensible more according to above-mentioned steps
Intermediate base 1, and be equally spaced on cooling roller bed 4.
The rolling cycle that roughing mills roll out base among a 235*252mm is 120s, and rolling rear blank temperature is 1080
DEG C, base moves 860 ± 15 DEG C of rolling temperature control among 235*252mm, and the required time is 586-671s, therefore in cooling roller bed
The intermediate base quantity of placement is 5.While 6th intermediate base 1 removes rolling line roller-way 2, traversing Hui Zhi mechanism 5 is from cooling roller bed
On intermediate base will be placed on rolling line roller-way 2, then after the 1st intermediate base extract, be moved horizontally to 2 top of rolling line roller-way
Traversing Hui Zhi mechanism 5 returns to next position for needing to take intermediate base.
The position that the intermediate base 1 of temperature cuts 8 through being delivered to cutting head is cooled on rolling line roller-way 2, by intermediate base cerebral cryotherapy area
Excision, then be sent to mm finishing mill unit 9 and carry out controlled rolling.Due to reducing final rolling temperature, the grain size of the finished product bar after rolling
By 5 grades of not controlled rolling, improve to 7 grades.After controlled rolling, the production efficiency of φ 180mm scale rod bar is reduced less than 8%.
Claims (4)
1. a kind of large scale rod bar controlled rolling method, it is characterised in that in addition controlled rolling equipment is set in the normal operation of rolling
Cooling roller bed, specific milling step are set are as follows: milling train rolls rear intermediate base and removes from rolling line roller-way, moves back and forth on cooling roller bed
With it is air-cooled, intermediate base, which reaches to be returned after predetermined temperature, is placed in rolling line roller-way, after cutting head, with subsequent milling train to intermediate base into
Row controlled rolling.
2. large scale rod bar controlled rolling method as described in claim 1, which is characterized in that controlled rolling equipment is mainly by rolling line
Roller-way (2), stepping mobile mechanism (3), cooling roller bed (4), traversing Hui Zhi mechanism (5) are constituted；Rolling line roller-way (2) and cooling roller bed
(4) it and is not connected with, respectively works independently；After roughing cogging, intermediate base is sent to the rolling line roller between roughing mill and finishing mill
Road region, after stopping, intermediate base (1) transfers out rolling line roller-way (2) by stepping mobile mechanism (3), is placed on cooling roller bed (4)
On, cooling roller bed (4) moves reciprocatingly, and after intermediate base is cooled to predetermined temperature, is returned by traversing Hui Zhi mechanism and be placed in rolling line roller-way,
After cutting head, controlled rolling is carried out to intermediate base with subsequent milling train.
3. large scale rod bar controlled rolling method as claimed in claim 1 or 2, which is characterized in that milling train after rolling intermediate base from rolling
Line roller-way removes, and moves back and forth on cooling roller bed, and intermediate base can be uniformly air-cooled, can be reduced intermediate base and cooling roller bed contact zone
Transition it is cooling, prevent cooling roller bed from bending because of temperature unevenness.
4. large scale rod bar controlled rolling method as claimed in claim 1 or 2, which is characterized in that can be placed more on cooling roller bed
More intermediate bases, and be equally spaced on cooling roller bed, improve production efficiency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910420037.2A CN110153199A (en) | 2019-05-20 | 2019-05-20 | A kind of controlled rolling method of large scale rod bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910420037.2A CN110153199A (en) | 2019-05-20 | 2019-05-20 | A kind of controlled rolling method of large scale rod bar |
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| Publication Number | Publication Date |
|---|---|
| CN110153199A true CN110153199A (en) | 2019-08-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910420037.2A Pending CN110153199A (en) | 2019-05-20 | 2019-05-20 | A kind of controlled rolling method of large scale rod bar |
Country Status (1)
| Country | Link |
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| CN (1) | CN110153199A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112108525A (en) * | 2020-09-16 | 2020-12-22 | 南京钢铁股份有限公司 | Air cooling control method for reducing temperature of rolled piece and steel rolling production line |
| CN112676340A (en) * | 2020-11-24 | 2021-04-20 | 南京钢铁股份有限公司 | Cooling control device and method for reducing core surface temperature difference and surface hardness of large-size bar |
| CN113477725A (en) * | 2021-06-03 | 2021-10-08 | 包头钢铁（集团）有限责任公司 | Production method of coiled sucker rod |
| CN115090669A (en) * | 2022-05-07 | 2022-09-23 | 江苏沙钢集团淮钢特钢股份有限公司 | Efficient bar controlled rolling method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201399478Y (en) * | 2009-03-31 | 2010-02-10 | 江苏沙钢集团淮钢特钢有限公司 | Traversing device for bar production line |
| CN102896147A (en) * | 2012-10-25 | 2013-01-30 | 西安盛日机电科技有限公司 | Large-space hole-free rolling device and rolling method of bar production line |
| CN104492826A (en) * | 2014-12-16 | 2015-04-08 | 中冶赛迪工程技术股份有限公司 | Temperature-controlled rolling line for large-sized and medium-sized rolled workpieces and temperature-controlled rolling process |
| CN204320810U (en) * | 2014-12-16 | 2015-05-13 | 中冶赛迪工程技术股份有限公司 | Large gauge rolled piece temperature-controlled rolling line in one |
| CN106424160A (en) * | 2016-11-14 | 2017-02-22 | 北京京诚瑞信长材工程技术有限公司 | Rolled steel production line capable of meeting after-rolling cooling control requirements of multiple alloy steel bars |
| JP2018001211A (en) * | 2016-06-30 | 2018-01-11 | Ｊｆｅスチール株式会社 | Method and equipment for production of hot-rolled steel belt |
| CN206966315U (en) * | 2017-06-16 | 2018-02-06 | 中冶赛迪工程技术股份有限公司 | High-speed wire production line |
-
2019
- 2019-05-20 CN CN201910420037.2A patent/CN110153199A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201399478Y (en) * | 2009-03-31 | 2010-02-10 | 江苏沙钢集团淮钢特钢有限公司 | Traversing device for bar production line |
| CN102896147A (en) * | 2012-10-25 | 2013-01-30 | 西安盛日机电科技有限公司 | Large-space hole-free rolling device and rolling method of bar production line |
| CN104492826A (en) * | 2014-12-16 | 2015-04-08 | 中冶赛迪工程技术股份有限公司 | Temperature-controlled rolling line for large-sized and medium-sized rolled workpieces and temperature-controlled rolling process |
| CN204320810U (en) * | 2014-12-16 | 2015-05-13 | 中冶赛迪工程技术股份有限公司 | Large gauge rolled piece temperature-controlled rolling line in one |
| JP2018001211A (en) * | 2016-06-30 | 2018-01-11 | Ｊｆｅスチール株式会社 | Method and equipment for production of hot-rolled steel belt |
| CN106424160A (en) * | 2016-11-14 | 2017-02-22 | 北京京诚瑞信长材工程技术有限公司 | Rolled steel production line capable of meeting after-rolling cooling control requirements of multiple alloy steel bars |
| CN206966315U (en) * | 2017-06-16 | 2018-02-06 | 中冶赛迪工程技术股份有限公司 | High-speed wire production line |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112108525A (en) * | 2020-09-16 | 2020-12-22 | 南京钢铁股份有限公司 | Air cooling control method for reducing temperature of rolled piece and steel rolling production line |
| CN112676340A (en) * | 2020-11-24 | 2021-04-20 | 南京钢铁股份有限公司 | Cooling control device and method for reducing core surface temperature difference and surface hardness of large-size bar |
| CN113477725A (en) * | 2021-06-03 | 2021-10-08 | 包头钢铁（集团）有限责任公司 | Production method of coiled sucker rod |
| CN115090669A (en) * | 2022-05-07 | 2022-09-23 | 江苏沙钢集团淮钢特钢股份有限公司 | Efficient bar controlled rolling method |
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Application publication date: 20190823 |
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