CN106493179A - A kind of steel plate Cooling Process method that supercool section length is calculated end to end - Google Patents

A kind of steel plate Cooling Process method that supercool section length is calculated end to end Download PDF

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Publication number
CN106493179A
CN106493179A CN201611216632.7A CN201611216632A CN106493179A CN 106493179 A CN106493179 A CN 106493179A CN 201611216632 A CN201611216632 A CN 201611216632A CN 106493179 A CN106493179 A CN 106493179A
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China
Prior art keywords
supercool
steel plate
section length
rolling
head
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CN201611216632.7A
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Chinese (zh)
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CN106493179B (en
Inventor
路士平
马长文
顾林豪
田鹏
李群
王海宝
隋鹤龙
张苏渊
狄国标
李少坡
樊星辰
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Shougang Corp
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Shougang Corp
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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
    • B21B37/72—Rear end control; Front end control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • 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
    • B21B45/02—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 for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

A kind of steel plate Cooling Process method that supercool section length is calculated end to end, belongs to cut deal and rolls rear Water Cooling Technology field.Step is：The rolling force curve of rolled plate last a time is first detected；It is analyzed to rolling force curve again, abscissa value corresponding with the position that roll-force fluctuation range during stable rolling is 10% 15% is time separation t1 and t2；By L1=v*t1, L2=v*t2 calculates steel plate head with supercool section length L1 of afterbody and L2.Advantage is, departs from the temperature detection curve of producing line, judge the length in supercool region by rolling force curve；The temperature energy imposite consideration of steel plate, the one-sidedness of data when breaking away from single-point thermometric.

Description

A kind of steel plate Cooling Process method that supercool section length is calculated end to end
Technical field
The invention belongs to cut deal rolls rear Water Cooling Technology field, more particularly to a kind of steel plate Cooling Process supercool head of district end to end The method that degree is calculated.Cut deal roll after end to end position because temperature reduce more serious, cause the fluctuation of roll-force larger, therefore may be used The supercool end to end section length before steel plate water-cooled is determined by the roll-force detected value of milling train.
Background technology
During steel plate rolling at this stage, in order to ensure the performance of high-quality steel plate, widely used control refrigeration technique, cooling Steel plate length can reach 30 meters.Due to cooling down boundary condition and the difference of cool time, steel plate temperature end to end with middle part Difference is larger, and the water yield for head with afterbody during water-cooled will be less than medium position, to realize the equal of imposite cooling Even property.The supercool end to end section length of water-cooled at this stage, be all according to steel plate enter the temperature-detecting device before water determine long along steel plate The temperature curve in degree direction, determines the low region of temperature, takes this as a foundation to divide the head and tail temperature lower region on steel plate Length, i.e.,：Supercool section length end to end.
Content of the invention
It is an object of the invention to provide a kind of steel plate Cooling Process method that supercool section length is calculated end to end, solves water The supercool section length of cold steel plate sets inaccurate problem.
A kind of steel plate Cooling Process method that supercool section length is calculated end to end, is detected using the roll-force that milling equipment is carried Function, detects that the rolling force data of the actual operation of rolling, detected value fluctuation exceed the position of the 10% of stable rolling power and determine For supercool section length.Concrete steps and parameter are as follows：
1) the rolling force curve of the last a time of detection rolled plate；
2) it is analyzed to rolling force curve, with the position pair that roll-force fluctuation range during stable rolling is 10%-15% The abscissa value that answers is time separation, and head and afterbody take time separation t1 and t2 respectively；
3) zone length is drawn according to the product of separation time and mill speed, L1=v*t1, L2=v*t2, L1, L2 is steel plate head and the supercool section length of afterbody, and v is mill speed, and t1, t2 are the separation time；
4) according to L1, L2 result is calculated, the supercool section length of head and afterbody is determined on steel plate, L1 is that head is supercool Section length, L2 are the supercool section length of afterbody.
It is an advantage of the current invention that：
1) depart from the temperature detection curve of producing line, the length in supercool region is judged by rolling force curve；
2) for the steel plate for needing water-cooled, realize that steel rolling and the overall data of water-cooled are managed, be easy to analyze；
3) the temperature energy imposite consideration of steel plate, the one-sidedness of data when breaking away from single-point thermometric.
Description of the drawings
Fig. 1 is that supercool section length of the invention determines that the flow process of method is illustrated.
Fig. 2 determines signal for supercool section length of the invention.
Fig. 3 crosses cold-zone time point for the present invention and determines result.
Specific embodiment
A kind of steel plate Cooling Process method that supercool section length is calculated end to end, step is：
1) operation of rolling data of a certain steel grade are searched according to milling train secondary data, and such as Q345B, in the collection operation of rolling Rolling force curve；
2) according to the rolling force curve of rolling extreme trace time, operation of rolling roll-force end to end and stable rolling phase difference 10% are taken It is 4000KN during corresponding time span, such as extreme trace time rolling force curve stable rolling, and workpiece front end position roll-force exceedes 10% time was 0.3s；
3) according to the rate curve of the operation of rolling, mill speed is 2m/s；
4) supercool section length L1=t*v=2*0.3=0.6m of head.

Claims (1)

1. a kind of steel plate Cooling Process method that supercool section length is calculated end to end, it is characterised in that concrete steps and parameter are as follows：
1) the rolling force curve of the last a time of detection rolled plate；
2) it is analyzed to rolling force curve, corresponding for the position of 10%-15% with roll-force fluctuation range during stable rolling Abscissa value is time separation, and head and afterbody take time separation t1 and t2 respectively；
3) zone length is drawn according to the product of separation time and mill speed, L1=v*t1, L2=v*t2, L1, L2 are Steel plate head and the supercool section length of afterbody, v are mill speed, and t1, t2 are the separation time；
4) according to L1, L2 result is calculated, the supercool section length of head and afterbody is determined on steel plate, L1 is the supercool head of district of head Degree, L2 are the supercool section length of afterbody.
CN201611216632.7A 2016-12-25 2016-12-25 A kind of method that section length calculating is subcooled in steel plate Cooling Process end to end Active CN106493179B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611216632.7A CN106493179B (en) 2016-12-25 2016-12-25 A kind of method that section length calculating is subcooled in steel plate Cooling Process end to end

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611216632.7A CN106493179B (en) 2016-12-25 2016-12-25 A kind of method that section length calculating is subcooled in steel plate Cooling Process end to end

Publications (2)

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CN106493179A true CN106493179A (en) 2017-03-15
CN106493179B CN106493179B (en) 2018-08-21

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111093850A (en) * 2017-09-19 2020-05-01 日本制铁株式会社 Cooling device and cooling method for steel material
CN112742880A (en) * 2019-10-31 2021-05-04 宝山钢铁股份有限公司 Method for controlling head and tail shapes of narrow-specification steel plates through local temperature difference

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003025008A (en) * 2001-07-12 2003-01-28 Kawasaki Steel Corp Control method for cooling metallic material to be rolled in hot rolling
CN101733291A (en) * 2010-02-10 2010-06-16 东北大学 Method for controlling speed of cooling roller bed after rolling medium plate
CN102343367A (en) * 2011-10-14 2012-02-08 东北大学 Control method for lowering head and tail undercooled sections of steel plate in pressure jet cooling process
CN102380514A (en) * 2011-11-13 2012-03-21 首钢总公司 Method for promoting uniformity of cooling-control temperature of hot-rolled steel sheet
CN103987470A (en) * 2012-12-06 2014-08-13 新日铁住金株式会社 Method for cooling hot-rolled steel sheet

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003025008A (en) * 2001-07-12 2003-01-28 Kawasaki Steel Corp Control method for cooling metallic material to be rolled in hot rolling
CN101733291A (en) * 2010-02-10 2010-06-16 东北大学 Method for controlling speed of cooling roller bed after rolling medium plate
CN102343367A (en) * 2011-10-14 2012-02-08 东北大学 Control method for lowering head and tail undercooled sections of steel plate in pressure jet cooling process
CN102380514A (en) * 2011-11-13 2012-03-21 首钢总公司 Method for promoting uniformity of cooling-control temperature of hot-rolled steel sheet
CN103987470A (en) * 2012-12-06 2014-08-13 新日铁住金株式会社 Method for cooling hot-rolled steel sheet

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111093850A (en) * 2017-09-19 2020-05-01 日本制铁株式会社 Cooling device and cooling method for steel material
CN112742880A (en) * 2019-10-31 2021-05-04 宝山钢铁股份有限公司 Method for controlling head and tail shapes of narrow-specification steel plates through local temperature difference
CN112742880B (en) * 2019-10-31 2022-12-16 宝山钢铁股份有限公司 Method for controlling head and tail shapes of narrow-specification steel plates through local temperature difference

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