CN102672415A - Steel coil opening and leveling method for reducing warping of steel plate after cutting - Google Patents

Steel coil opening and leveling method for reducing warping of steel plate after cutting Download PDF

Info

Publication number
CN102672415A
CN102672415A CN2012101331267A CN201210133126A CN102672415A CN 102672415 A CN102672415 A CN 102672415A CN 2012101331267 A CN2012101331267 A CN 2012101331267A CN 201210133126 A CN201210133126 A CN 201210133126A CN 102672415 A CN102672415 A CN 102672415A
Authority
CN
China
Prior art keywords
opening
leveling
plate
steel
steel plate
Prior art date
Application number
CN2012101331267A
Other languages
Chinese (zh)
Inventor
钱健清
李胜祗
Original Assignee
安徽工业大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 安徽工业大学 filed Critical 安徽工业大学
Priority to CN2012101331267A priority Critical patent/CN102672415A/en
Publication of CN102672415A publication Critical patent/CN102672415A/en

Links

Abstract

The invention discloses a steel coil opening and leveling method for reducing warping of a steel plate after cutting and belongs to the technical fields of metal plastic processing and molding. The opening and leveling method comprises opening the coil, longitudinally cutting edges, keeping smooth, straightening, transversely cutting and determining size, refinedly correcting, detecting, collecting and bundling finally. The steel coil opening and leveling method is characterized by adopting a two-roller or multi-roller leveling process, enabling residual stress of two surfaces of the steel plate to be unanimous in direction, and then straightening. The steel coil opening and leveling method can reduce deformation of an opening and leveling plate caused by residual stress release during processing, improves overall performance indexes and plate face stability of the opening and leveling plate, does not need any heat treatment and has the advantages of being capable of saving energy and reducing consumption, reducing treatment cost and shortening production cycles.

Description

A kind of steel plate that reduces is cut the coil of strip extraction of square root method of warpage afterwards
Technical field
The invention belongs to the Metal Forming field shaping technique, be specifically related to a kind of coil of strip extraction of square root method that steel plate is cut the back warpage that reduces.
Background technology
For improving the production efficiency and being convenient to transportation, when dispatching from the factory, hot rolled strip is the cylindric rolling supply of material, then open flat processing, " opening plate " that the flat board that forms thus promptly is commonly called as before the use through machining.Manufacturing procedure by steel band to opening plate comprises: uncoiling-→ the rip cutting limit-→ aligning-→ the crosscut scale-→ collect, bundling.According to the GB GB/T 709-2006 definition of new revision, opening plate is called as shears steel plate (or continuous-milling steel plate), and corresponding therewith former flat board then is called as single rolled steel plate (singly offseting plate).
Although two types of steel plates can be accomplished indifference on material, comparing opening plate with former flat board still has following deficiency:
1, with regard to outer shape, the continuous-milling steel plate tolerance grade is higher, but width is narrower, gauge thickness is thin partially, and plate face unevenness will obviously be inferior to single rolled steel plate.
2, because tradition is opened flat processing carries out at the normal temperature state, process can't produce replys and crystallization again, and it is heavily stressed residual that plastic deformation and the work hardening that causes cause opening plate to exist, and surface quality and stability are relatively poor relatively.
3, opening plate internal stress distribution situation changes with the difference of working process parameter, still is difficult to accurately hold theoretically its regularity of distribution at present; The internal stress of uneven distribution causes sheet material different parts actual bearer capacity variance big (along laterally differing particularly evident), and is bigger to the use restriction of opening plate.
4, opening plate will slowly discharge internal residual stress after placing a period of time, and the different arcuation camber of degree can appear in the plate face; Meet processing such as bending, cutting or welding, opening plate more will discharge abundant residues stress fast, produce the distortion of proofreading and correct difficulty.This type of plate facial disfigurement can influence the use of sheet material.
5, in shipbuilding, dynamo-electric and pressure vessel manufacturing etc. sheet material is had the application of high surface quality and mechanical property coherence request, the application of opening plate is very limited.
As seen from the above analysis the residual stress of opening plate is big, causes plate face processing back because Stress Release causes its distortion, is the most fatal defect factors of opening plate quality.Patent CN1979161 discloses a kind of method of testing of hot continuous rolling high strength steel plate residual stress; This method is used resistance strain gauge the overstrain value of sample is measured; In conjunction with the value of COMPUTER CALCULATION sample residual stress, analyze whole sample residual stress distribution.The method of testing of the hot continuous rolling high strength steel plate residual stress that this invention provides is consistent, the result is accurate; Can intuitively measure hot continuous rolling high-intensity steel plate residual stress numerical value rapidly; The situation of change of complete quantitative response aligning process hot continuous rolling high-intensity steel plate residual stress distribution can be hot continuous rolling high-intensity steel plate straightening process theoretical foundation and technical support is provided.But this method only provides the detection method of steel plate residual-stress value, does not relate to and how to reduce the steel plate residual stress.Patent 200910083475 discloses a kind of deep processing treatment system for hot rolling strip steel, belongs to band steel deep process technology field, comprise one independently hot-strip open flat-bed machine group and a heat-treatment lines; Heat-treatment lines comprises a quenching heat treatment line and/or a normalizing heat-treatment lines; Hot-strip is opened flat-bed machine group and heat-treatment lines and is arranged in adjacent finished product strides, and hot-strip is opened opening plate that the flat-bed machine group produced and striden flat car or other means of transportation and be transported to that heat-treatment lines quenches or temper through crossing.Advantage is to have characteristics such as compound mode is simple, process route flexible, adaptation steel grade scope is wide; When satisfying domestic consumer's demand, but also production high-performance, high value-added product, to satisfy the specific demand of high-end user, panel products during part substitutes.But this method only is out the simple combination of flat production line and heat-treatment production line; Quench or temper not only invest big, processing cost is higher, the production cycle is long, oxidation has a strong impact on surface quality, and quenching or temper can cause steel plate and be out of shape once more.
Summary of the invention
To the existing deficiency of opening flat technology, the present invention provides a kind of coil of strip extraction of square root method that steel plate is cut the back warpage that reduces.
A kind of steel plate that reduces provided by the present invention is cut the concrete steps of the coil of strip extraction of square root method of back warpage and is: uncoiling, rip cutting limit, smooth, aligning, crosscut scale, smartly rectify, check, collect at last, bundling.Saidly smoothly be: use two rollers or multiple roll planisher that coil of strip is carried out the smooth processing of percentage elongation as 0.5-5%.
Opening plate mainly produces residual stress when uncoiling, and residual stress concentrates on the steel plate top layer basically, and the residual stress on two surfaces is in the opposite direction, and Stress Release forms stack moment after processing, has aggravated camber of sheet.In opening flat process, set up the smooth operation of steel strip surface; Can change the residual stress direction on two surfaces; Make their directions identical; Stress Release stress does not only produce stack moment after processing, and cancels out each other, and so significantly reduces opening plate and discharges the distortion that produces because of processing like residual stress in the processing such as bending, cutting or welding.
The present invention increases a smooth operation newly existing opening in the flat production line; Adopt two rollers or multiple roll planisher that opening plate is carried out smooth processing after the uncoiling; Smooth percentage elongation is at 0.5-5%; Smooth back gets into aligning, and the aligning under this state can change opening plate residual stress distribution and direction, thus but riser face quality stability and improve combination property.
The inventive method is through changing opening plate residual stress aspect and distribution; Reduce opening plate and discharge the deformation extent that produces like residual stress in the processing such as bending, cutting or welding because of processing; Improve opening plate integrated performance index and plate face quality stability; Simultaneously without any need for heat treatment step, energy-saving and cost-reducing, reduce processing cost, shorten the production cycle.
Cold working has generality, adaptability to method provided by the present invention to sheet material normal temperature, and is promptly very suitable to a series of sheet material deep processings that comprise cold-rolled forming section production.
The specific embodiment
Embodiment 1: open at the conventional steel band of certain factory and install a cover two-high dressing mill on the horizontal line additional.
Opening flat steel band is 6 * 1800, rolls up heavyly 20 tons, and steel grade is Q235B, and opening plate is of a size of 6 * 1800 * 120000.
At first adopt common process to carry out uncoiling and cut edge, launch the two-high dressing mill before the aligning afterwards, to steel plate carry out percentage elongation be 1% smooth, align afterwards, crosscut, smart rectifying collected after the check, packed.
To shearing processing, specifically be longitudinally to cut 200mm respectively, detect the warpage degree of steel plate head with sawing method at the steel plate of opening after putting down with the opening plate of the inventive method and produced in conventional processes.Assay is as shown in table 1.Decline to a great extent from the visible warpage degree of the opening plate head of the inventive method production that adopts of table 1.
The warpage degree test comparison of the opening plate head of table 1 the inventive method and produced in conventional processes
Limit portion (Mpa) Center (Mpa)
The warpage degree of traditional handicraft 10 6
The warpage degree of new technology 3 2
Embodiment 2: open at the conventional steel band of certain factory and install a cover four roller planishers on the horizontal line additional.
Opening flat steel band is 10 * 1800, rolls up heavyly 22 tons, and steel grade is Q345B, and opening plate is of a size of 10 * 1800 * 120000.
At first adopt common process to carry out uncoiling and cut edge, launch the two-high dressing mill before the aligning afterwards, to steel plate carry out percentage elongation be 1.5% smooth, align afterwards, crosscut, smart rectifying collected after the check, packed.
To shearing processing, specifically be longitudinally to cut 200mm respectively, detect the warpage degree of steel plate head with sawing method at the steel plate of opening after putting down with the opening plate of the inventive method and produced in conventional processes.Assay is as shown in table 2.Decline to a great extent from the visible warpage degree of the opening plate head of the inventive method production that adopts of table 2.
? Limit portion (Mpa) Center (Mpa)
The warpage degree of traditional handicraft (mm) 8 5
The warpage degree of new technology (mm) 2.5 2
Embodiment 3:
Open at the conventional steel band of certain factory and to install a cover four roller planishers on the horizontal line additional.
Opening flat steel band is 16 * 2000, rolls up heavyly 30 tons, and steel grade is Q235B, and opening plate is of a size of 16 * 2000 * 120000.
At first adopt common process to carry out uncoiling and cut edge, launch the two-high dressing mill before the aligning afterwards, to steel plate carry out percentage elongation be 3% smooth, align afterwards, crosscut, smart rectifying collected after the check, packed.
To shearing processing, specifically be longitudinally to cut 200mm respectively, detect the warpage degree of steel plate head with sawing method at the steel plate of opening after putting down with the opening plate of the inventive method and produced in conventional processes.Assay is as shown in table 3.Decline to a great extent from the visible warpage degree of the opening plate head of the inventive method production that adopts of table 3.
The warpage degree test comparison of the opening plate head of table 3 the inventive method and produced in conventional processes
Limit portion (Mpa) Center (Mpa)
The warpage degree of traditional handicraft (mm) 6 5
The warpage degree of new technology (mm) 1.5 1.5

Claims (2)

1. one kind is reduced the coil of strip extraction of square root method that steel plate is cut the back warpage, it is characterized in that said coil of strip extraction of square root method concrete steps are: uncoiling, rip cutting limit, smooth, aligning, crosscut scale, smartly rectify, check, collect at last, bundling.
2. a kind of coil of strip extraction of square root method that steel plate is cut the back warpage that reduces according to claim 1 is characterized in that saidly smoothly being: use two rollers or multiple roll planisher that coil of strip is carried out the smooth processing of percentage elongation as 0.5-5%.
CN2012101331267A 2012-05-03 2012-05-03 Steel coil opening and leveling method for reducing warping of steel plate after cutting CN102672415A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012101331267A CN102672415A (en) 2012-05-03 2012-05-03 Steel coil opening and leveling method for reducing warping of steel plate after cutting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012101331267A CN102672415A (en) 2012-05-03 2012-05-03 Steel coil opening and leveling method for reducing warping of steel plate after cutting

Publications (1)

Publication Number Publication Date
CN102672415A true CN102672415A (en) 2012-09-19

Family

ID=46805323

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012101331267A CN102672415A (en) 2012-05-03 2012-05-03 Steel coil opening and leveling method for reducing warping of steel plate after cutting

Country Status (1)

Country Link
CN (1) CN102672415A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103495850A (en) * 2013-07-24 2014-01-08 李庆中 Low residual stress steel belt decoiling technology

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB668244A (en) * 1950-02-28 1952-03-12 Robertson Co H H Improved process and apparatus for producing rolled steel sheets for use in floor construction
JPH0976002A (en) * 1995-09-12 1997-03-25 Hitachi Metals Ltd Method for rolling wire rod
WO1999002281A1 (en) * 1997-07-11 1999-01-21 Siemens Aktiengesellschaft Process and installation for rolling a metal strip
CN1840256A (en) * 2005-03-28 2006-10-04 宝山钢铁股份有限公司 Flattening process for steel strip
CN1840254A (en) * 2005-03-28 2006-10-04 宝山钢铁股份有限公司 Optimized presetting method for steel strip-flattening technological parameter
CN1864879A (en) * 2006-06-06 2006-11-22 湖南华菱涟源钢铁有限公司 A method for making semi-processed cold rolled silicon steel in thin slab continuous casting and continuous rolling process
CN101462129A (en) * 2008-12-30 2009-06-24 中冶南方工程技术有限公司 Method for decreasing band steel residual stress on hot rolling leveling machine unit
CN101486051A (en) * 2009-02-24 2009-07-22 武钢集团昆明钢铁股份有限公司 Method for leveling titanium board coil
CN101670372A (en) * 2009-09-25 2010-03-17 首钢总公司 Method for eliminating defect of strip shape of hot-rolled high-strength steel
CN102041448A (en) * 2010-12-30 2011-05-04 首钢总公司 Steel for micro vanadium-titanium composite processing boilers and pressure vessels and manufacturing method thereof

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB668244A (en) * 1950-02-28 1952-03-12 Robertson Co H H Improved process and apparatus for producing rolled steel sheets for use in floor construction
JPH0976002A (en) * 1995-09-12 1997-03-25 Hitachi Metals Ltd Method for rolling wire rod
WO1999002281A1 (en) * 1997-07-11 1999-01-21 Siemens Aktiengesellschaft Process and installation for rolling a metal strip
CN1840256A (en) * 2005-03-28 2006-10-04 宝山钢铁股份有限公司 Flattening process for steel strip
CN1840254A (en) * 2005-03-28 2006-10-04 宝山钢铁股份有限公司 Optimized presetting method for steel strip-flattening technological parameter
CN1864879A (en) * 2006-06-06 2006-11-22 湖南华菱涟源钢铁有限公司 A method for making semi-processed cold rolled silicon steel in thin slab continuous casting and continuous rolling process
CN101462129A (en) * 2008-12-30 2009-06-24 中冶南方工程技术有限公司 Method for decreasing band steel residual stress on hot rolling leveling machine unit
CN101486051A (en) * 2009-02-24 2009-07-22 武钢集团昆明钢铁股份有限公司 Method for leveling titanium board coil
CN101670372A (en) * 2009-09-25 2010-03-17 首钢总公司 Method for eliminating defect of strip shape of hot-rolled high-strength steel
CN102041448A (en) * 2010-12-30 2011-05-04 首钢总公司 Steel for micro vanadium-titanium composite processing boilers and pressure vessels and manufacturing method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
QUMAN0334: "热轧板卷", 《HTTP://BAIKE.BAIDU.COM/HISTORY/14444194》, 23 August 2010 (2010-08-23), pages 1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103495850A (en) * 2013-07-24 2014-01-08 李庆中 Low residual stress steel belt decoiling technology

Similar Documents

Publication Publication Date Title
CN102240676B (en) Rolling device for preparing high-toughness high-formability magnesium alloy sheet strip coil
CN104294088B (en) A kind of manufacture method of bottle lid of cosmetics aluminium strip
CN102581067B (en) Hot-rolled coiler pinch roll controlling method
CN102794301B (en) Manufacture method of cold-rolled electrolytic tin substrate
CN103465027B (en) The thin brilliant dish base manufacture method of a kind of GH4169 alloy
CN101513705B (en) Cold roller production process
CN101580922B (en) Method for producing tin phosphorus bronze band by direct cold cogging
CN104525588B (en) A kind of thick steel plates course of hot rolling that improves deforms infiltrative method
CN103191928B (en) 304 stainless steel strip and production method thereof
CN103212574B (en) Method for preparing aluminium alloy compound foil by compounding cold rolling and warm rolling
EP2329897B1 (en) Pressed body
CN100411760C (en) Dynamic thickening rolling process of controlling break of cold rolled thin strip steel
CN102941232A (en) Method for controlling hot continuous rolling finish rolling process
CN103464469A (en) Edge drop control method of cold-rolled non-oriented silicon steel
CN102240715B (en) Forming process for special C-shaped channel steel
CN103521518B (en) The hot continuous rolling process of stainless plate strip coil
CN103111464B (en) Manufacturing method of super-thick steel plate
CN102125932B (en) Hot rolling device for magnesium alloy and rolling heating method
CN104511484A (en) Slight center wave strip-shape control method of hot-rolled strip steel
CN108067837B (en) Method and apparatus for manufacturing sheet metal blank
CN102641903A (en) Steckel mill rolled piece head-and-tail deviation control method
CN101069908A (en) Process for board-rolling machine to make roll
CN102672014B (en) Method for producing cold-formed steel of U-shaped davit arm
CN101554635B (en) Method for configuring shape of supporting roll of four-high mill and shape of working roll thereof
CN101628297A (en) Reversible hot-rolling process of titanium plate coil

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C12 Rejection of a patent application after its publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20120919