EP1306142A1 - Verfahren zum längstrennwalzen von waldgut - Google Patents

Verfahren zum längstrennwalzen von waldgut Download PDF

Info

Publication number
EP1306142A1
EP1306142A1 EP01957647A EP01957647A EP1306142A1 EP 1306142 A1 EP1306142 A1 EP 1306142A1 EP 01957647 A EP01957647 A EP 01957647A EP 01957647 A EP01957647 A EP 01957647A EP 1306142 A1 EP1306142 A1 EP 1306142A1
Authority
EP
European Patent Office
Prior art keywords
pass
rolling
feed
square
billet
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP01957647A
Other languages
English (en)
French (fr)
Other versions
EP1306142A4 (de
EP1306142B1 (de
Inventor
Alexandr Nickolaevich Bondarenko
Vadim Vladimirovich Philippov
Michail Pavlovich Gulyaev
Yuri Vladimirovich Dyachenko
Vladimir Andreevich Tischenko
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Respublikanskoe Unitarnoe Predpriyatie "Belorissky Metallurgichesky Zavod"
Original Assignee
Respublikanskoe Unitarnoe Predpriyatie "Belorissky Metallurgichesky Zavod"
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
Priority claimed from RU2000125597A external-priority patent/RU2176165C1/ru
Application filed by Respublikanskoe Unitarnoe Predpriyatie "Belorissky Metallurgichesky Zavod" filed Critical Respublikanskoe Unitarnoe Predpriyatie "Belorissky Metallurgichesky Zavod"
Publication of EP1306142A1 publication Critical patent/EP1306142A1/de
Publication of EP1306142A4 publication Critical patent/EP1306142A4/de
Application granted granted Critical
Publication of EP1306142B1 publication Critical patent/EP1306142B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • B21B1/08—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 structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B1/0815—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 structural sections, i.e. work of special cross-section, e.g. angle steel from flat-rolled products, e.g. by longitudinal shearing
    • 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
    • B21B1/02—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
    • B21B1/026—Rolling
    • 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
    • B21B1/08—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 structural sections, i.e. work of special cross-section, e.g. angle steel

Definitions

  • the present invention relates to rolling process, particularly to the methods of rolling at reversing mills, roughing mills, continuous billet mills and heavy section mills chiefly for billet production.
  • the method of billet rolling at a reversing roughing mill [1] which includes applying of successive flat box passes with the groove bottom surface bent relative to its vertical axis towards the sidewalls situated on the body of the roll along its length, a square box pass with the groove sidewalls taper, a rhombic pass and a diagonal square pass was taken as a prototype.
  • the disadvantage of this method is the tendency of the feed coming from the rhombic pass to twist in the diagonal square pass which results in a worse quality of the finished product. This happens because the feed coming from the square box pass loses its diagonal symmetry during the operation (e.g. this may be caused by a wear of the pass). Due to this reason the feed coming from the rhombic pass loses its rhombic shape, i.e. the rhomb made in this pass loses its diagonal symmetry. When such feed goes through the diagonal square pass, it twists round its longitudinal axis and, besides the impairment of the quality of the finished product, this causes feed handling problems (e.g. manipulating, cross motion, etc.), it also makes the rolling cycle longer and lowers mill performance characteristics .
  • the object of the present invention is to provide simultaneous double feed rolling in square passes, to improve finished product quality, particularly its macrostructure, giving a heavy reduction to ingot core part, to improve mill performance characteristics.
  • Technological effects of the present invention are elimination of the feed twisting round its longitudinal axis in the diagonal square passes, decrease of ingot macrostructure defects due to axial porosity compacting and complete elimination of carbon segregation.
  • Fig. 1 illustrates a roll pass design consisting of five passes.
  • Fig.2 schematically represents the pass consisting of two diagonal squares connected by a bridge.
  • Fig.3 schematically represents a breaking pass, providing the bridge breaking and the double feed splitting into two separate billets.
  • the process of rolling using the system of passes according to the present invention is done as follows.
  • the original ingot with square or rectangular cross-section is heated in the reheating furnace of a roughing mill and is rolled first in a box pass 1 with the groove bottom surface bent about the pass vertical axis.
  • the feed is rolled in a forming (slitting) pass 2 having the shape of a twin feed, both parts of which have similar sectional areas of an oval or rhombic shape connected by a bridge.
  • the rolling method of the invention allows a greater degree of deformation of the original ingot core part where casting defects - central porosity and carbon segregation - are concentrated. For instance, diagonal square height total reduction coefficient in pass 4 is 1.8, and bridge total reduction coefficient in this pass is 75. High degree of the feed core part deformation allows to eliminate the original ingot central porosity. Due to the rolling method of the invention carbon segregation (casting defect) moves to the bridge area connecting two diagonal squares (fig.2).
  • the method of the invention is implemented at a roughing two-high reversing rolling mill 850 at the Democratic Unitary Enterprise "Byelorussian Steel Works” in manufacturing of high carbon steel st80 cord square billet 125x125 mm used for cord rod production.
  • the original ingot with square or rectangular cross-section is heated in the heating furnace of a roughing mill and is rolled first in a box pass 1 with the groove bottom surface bent about the pass standing axis.
  • the feed is rolled in a forming (slitting) pass 2 having the shape of double feed, both parts of which have the same sectional areas of an oval or rhombic shape connected by a bridge.
  • a forming (slitting) pass 2 having the shape of double feed, both parts of which have the same sectional areas of an oval or rhombic shape connected by a bridge.
  • the incoming rectangular feed centers itself in the pass at the moment of nipping due to simultaneous four-angle contact with the sidewalls of the pass and after slitting by means of the pass grooves ridges situated on the central vertical axis of the pass, two feeds with the same cross-section connected by a bridge are formed.
  • the method of the invention implemented under the conditions of the roughing rolling mill 850 allows to eliminate diagonal square twisting round the longitudinal axis, to improve mill performance characteristics due to simultaneous two square billets 125x125 mm rolling in the last pass and improve the billet macrostructure quality due to axial porosity compacting and complete elimination of carbon segregation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
EP01957647A 2000-07-04 2001-06-29 Verfahren zum längstrennwalzen von walzgut Expired - Lifetime EP1306142B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
BY20000637 2000-07-04
BY20000637 2000-07-04
RU2000125597 2000-10-12
RU2000125597A RU2176165C1 (ru) 2000-12-12 2000-12-12 Способ прокатки заготовок разделением
PCT/BY2001/000009 WO2002002250A1 (fr) 2000-07-04 2001-06-29 Procede de laminage de flans par separation

Publications (3)

Publication Number Publication Date
EP1306142A1 true EP1306142A1 (de) 2003-05-02
EP1306142A4 EP1306142A4 (de) 2005-10-19
EP1306142B1 EP1306142B1 (de) 2006-08-30

Family

ID=25665749

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01957647A Expired - Lifetime EP1306142B1 (de) 2000-07-04 2001-06-29 Verfahren zum längstrennwalzen von walzgut

Country Status (5)

Country Link
EP (1) EP1306142B1 (de)
AT (1) ATE337861T1 (de)
AU (1) AU2001279512A1 (de)
DE (2) DE60122742T2 (de)
WO (1) WO2002002250A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101530859B (zh) * 2008-03-12 2012-11-21 新疆八一钢铁股份有限公司 小断面螺纹钢的6线切分轧制工艺

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101500174B1 (ko) * 2013-10-24 2015-03-06 주식회사 포스코 금속 소재 슬릿 장치
MX2018000797A (es) 2015-07-22 2018-05-15 Kolene Corp Proceso de acondicionamiento de escamas para aleaciones de acero al carbono avanzado de alta resistencia.
CN115069766B (zh) * 2022-07-06 2023-06-13 山东钢铁集团永锋临港有限公司 一种用于四切分轧制生产Φ18mm热轧带肋钢筋的孔型系统

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191128777A (en) * 1911-12-21 1912-12-23 Thomas Doughty Improvements in Rolling Metals, and in Mills and Appliances Employed therein.
SU622514A1 (ru) * 1976-02-20 1978-07-22 Донецкий Ордена Трудового Красного Знамени Политехнический Институт Способ прокатки заготовок
SU1061860A1 (ru) * 1982-08-17 1983-12-23 Донецкий Ордена Трудового Красного Знамени Политехнический Институт Способ прокатки
RU2126728C1 (ru) * 1997-01-08 1999-02-27 Открытое акционерное общество "Западно-Сибирский металлургический комбинат" Способ сдвоенной прокатки арматурных профилей
US6050122A (en) * 1999-03-24 2000-04-18 Fabris; Mario Slitter for the production of multiple sections

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101530859B (zh) * 2008-03-12 2012-11-21 新疆八一钢铁股份有限公司 小断面螺纹钢的6线切分轧制工艺

Also Published As

Publication number Publication date
EP1306142A4 (de) 2005-10-19
EP1306142B1 (de) 2006-08-30
WO2002002250A1 (fr) 2002-01-10
ATE337861T1 (de) 2006-09-15
DE60122742T2 (de) 2007-08-23
DE60122742D1 (de) 2006-10-12
AU2001279512A1 (en) 2002-01-14
DE1306142T1 (de) 2003-11-27

Similar Documents

Publication Publication Date Title
AU738658B2 (en) Super thin strip hot rolling
US4402206A (en) Method of rolling slabs for the manufacture of beam blanks and a roll to be used therefor
RU2530609C2 (ru) Способ прокатки рельсов, устройство для прокатки рельсов и рельс, изготовленный указанным способом
EP1306142B1 (de) Verfahren zum längstrennwalzen von walzgut
JPS5858901A (ja) 棒縮小圧延方法
GB2105626A (en) Method for producing beam blank for universal beam
JPS5930481B2 (ja) ビレットの圧延方法
SU621307A3 (ru) Способ гор чей прокатки толстых листов,например,из непрерывнолитых сл бов и устройство дл его осуществлени
RU2176165C1 (ru) Способ прокатки заготовок разделением
RU2104104C1 (ru) Способ прокатки-разделения
GB1569196A (en) Slitting a multi-stranded bar
RU2277021C1 (ru) Способ листовой прокатки и устройство для его реализации
JPS62207544A (ja) 長尺製品用の圧延素材を連続鋳造によつて製造する方法
SU1061860A1 (ru) Способ прокатки
RU2165807C1 (ru) Вытяжной ящичный калибр
SU1065045A1 (ru) Способ прокатки асимметричных профилей
RU2179486C1 (ru) Способ продольного разделения непрерывнолитого сляба
SU1311804A1 (ru) Способ зачистки заготовок
JPS5823501A (ja) 条鋼の圧延方法
RU2011491C1 (ru) Способ огневой зачистки заготовок при прокатке
JPH0810425Y2 (ja) 一体型圧延ロール
GB1585654A (en) Method of rolling billets
SU1554998A1 (ru) Способ получени проката
SU865440A1 (ru) Способ гор чей прокатки широкополосной стали
RU2187398C2 (ru) Инструмент профилегибочного стана

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20030203

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

EL Fr: translation of claims filed
TCAT At: translation of patent claims filed
DET De: translation of patent claims
RBV Designated contracting states (corrected)

Designated state(s): AT BE DE FR GB IT

A4 Supplementary search report drawn up and despatched

Effective date: 20050907

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE DE FR GB IT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20060830

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 60122742

Country of ref document: DE

Date of ref document: 20061012

Kind code of ref document: P

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20070609

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20070622

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20070625

Year of fee payment: 7

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20070531

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20070618

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20070628

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20070628

Year of fee payment: 7

BERE Be: lapsed

Owner name: RESPUBLIKANSKOE UNITARNOE PREDPRIYATIE *BELORUSSKY

Effective date: 20080630

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20080629

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080630

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20090228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080629

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080629

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080629

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080630