RU2011147471A - METHOD AND DEVICE FOR CONTINUOUS CASTING OF SLAB - Google Patents

METHOD AND DEVICE FOR CONTINUOUS CASTING OF SLAB Download PDF

Info

Publication number
RU2011147471A
RU2011147471A RU2011147471/02A RU2011147471A RU2011147471A RU 2011147471 A RU2011147471 A RU 2011147471A RU 2011147471/02 A RU2011147471/02 A RU 2011147471/02A RU 2011147471 A RU2011147471 A RU 2011147471A RU 2011147471 A RU2011147471 A RU 2011147471A
Authority
RU
Russia
Prior art keywords
furnace
slab
continuous casting
maintaining
hydrogen
Prior art date
Application number
RU2011147471/02A
Other languages
Russian (ru)
Other versions
RU2493925C2 (en
Inventor
Кристиан КЛИНКЕНБЕРГ
Кристиан БИЛЬГЕН
Тильманн БЕХЕР
Лук НОЙМАНН
Original Assignee
Смс Зимаг Аг
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 Смс Зимаг Аг filed Critical Смс Зимаг Аг
Publication of RU2011147471A publication Critical patent/RU2011147471A/en
Application granted granted Critical
Publication of RU2493925C2 publication Critical patent/RU2493925C2/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • 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
    • B21B9/00—Measures for carrying out rolling operations under special conditions, e.g. in vacuum or inert atmosphere to prevent oxidation of work; Special measures for removing fumes from rolling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/14—Plants for continuous casting
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0056—Furnaces through which the charge is moved in a horizontal straight path
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/04—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity adapted for treating the charge in vacuum or special atmosphere
    • F27B9/045—Furnaces with controlled atmosphere
    • F27B9/047—Furnaces with controlled atmosphere the atmosphere consisting of protective gases
    • 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
    • B21B1/46—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 metal immediately subsequent to continuous casting
    • 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
    • B21B2045/006—Heating the product in vacuum or in inert atmosphere

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)

Abstract

1. Способ непрерывного литья сляба (1), в частности, из стали, в котором литой сляб (1) направляют через печь (2) и в котором сляб (1) подвергают операции удаления окалины, при этом по меньшей мере на одном участке (3) печи (2) поверхность сляба подвергают восстановлению тем, что на участке (3) печи (2) поддерживают атмосферу, которая состоит из инертного газа и водорода (Н) или из чистого водорода (Н), отличающийся тем, что в направлении (F) транспортировки перед и/или после по меньшей мере одного участка (3) печи (2) с восстановительной атмосферой расположен примыкающий участок (4) печи (2), в котором поверхность сляба подвергают окислению.2. Способ по п.1, отличающийся тем, что содержание водорода (Н) составляет между 3% и 99,5%.3. Способ по п.2, отличающийся тем, что содержание кислорода составляет между 5% и 50%.4. Способ по любому из пп.1-3, отличающийся тем, что инертным газом является азот (N).5. Способ по любому из пп.1-3, отличающийся тем, что инертным газом является аргон (Ar).6. Способ по любому из пп.1-3, отличающийся тем, что участок печи с окислительной атмосферой содержит по меньшей мере частично кислород (О).7. Способ по любому из пп.1-3, отличающийся тем, что нагревание сляба (1) в печи (2) выполняют за счет индукции.8. Способ по любому из пп.1-3, отличающийся тем, что непрерывную отливку заготовки выполняют в виде процесса разливки и прокатки.9. Способ по п.8, отличающийся тем, что нагревание сляба (1) выполняют в направлении (F) транспортировки после процесса разливки и перед процессом прокатки.10. Способ по любому из пп.1-3, отличающийся тем, что транспортировку сляба (1) выполняют непрерывно.11. Устройство для непрерывного литья сляба (1), которое содержит печь (2)1. The method of continuous casting of a slab (1), in particular of steel, in which a cast slab (1) is sent through a furnace (2) and in which the slab (1) is subjected to descaling, at least in one section ( 3) the furnace (2) the surface of the slab is subjected to restoration by the fact that in the area (3) of the furnace (2) an atmosphere is maintained, which consists of inert gas and hydrogen (H) or pure hydrogen (H), characterized in that in the direction ( F) transportation before and / or after at least one portion (3) of the furnace (2) with a reducing atmosphere is located rimykayuschy portion (4) of the furnace (2), in which the slab surface is subjected okisleniyu.2. The method according to claim 1, characterized in that the hydrogen content (H) is between 3% and 99.5%. The method according to claim 2, characterized in that the oxygen content is between 5% and 50%. A method according to any one of claims 1 to 3, characterized in that the inert gas is nitrogen (N). A method according to any one of claims 1 to 3, characterized in that the inert gas is argon (Ar) .6. A method according to any one of claims 1 to 3, characterized in that the portion of the furnace with an oxidizing atmosphere contains at least partially oxygen (O). A method according to any one of claims 1 to 3, characterized in that the heating of the slab (1) in the furnace (2) is carried out by induction. A method according to any one of claims 1 to 3, characterized in that the continuous casting of the preform is carried out in the form of a casting and rolling process. The method according to claim 8, characterized in that the heating of the slab (1) is performed in the direction (F) of transportation after the casting process and before the rolling process. The method according to any one of claims 1 to 3, characterized in that the transportation of the slab (1) is performed continuously. A device for continuous casting of a slab (1), which contains a furnace (2)

Claims (17)

1. Способ непрерывного литья сляба (1), в частности, из стали, в котором литой сляб (1) направляют через печь (2) и в котором сляб (1) подвергают операции удаления окалины, при этом по меньшей мере на одном участке (3) печи (2) поверхность сляба подвергают восстановлению тем, что на участке (3) печи (2) поддерживают атмосферу, которая состоит из инертного газа и водорода (Н2) или из чистого водорода (Н2), отличающийся тем, что в направлении (F) транспортировки перед и/или после по меньшей мере одного участка (3) печи (2) с восстановительной атмосферой расположен примыкающий участок (4) печи (2), в котором поверхность сляба подвергают окислению.1. The method of continuous casting of a slab (1), in particular of steel, in which a cast slab (1) is sent through a furnace (2) and in which the slab (1) is subjected to descaling, at least in one section ( 3) the furnace (2) the surface of the slab is subjected to recovery by the fact that in the area (3) of the furnace (2) an atmosphere is maintained, which consists of inert gas and hydrogen (H 2 ) or pure hydrogen (H 2 ), characterized in that the direction (F) of transport before and / or after at least one section (3) of the furnace (2) with a reducing atmosphere is located an adjacent portion (4) of the furnace (2), in which the surface of the slab is subjected to oxidation. 2. Способ по п.1, отличающийся тем, что содержание водорода (Н2) составляет между 3% и 99,5%.2. The method according to claim 1, characterized in that the hydrogen content (H 2 ) is between 3% and 99.5%. 3. Способ по п.2, отличающийся тем, что содержание кислорода составляет между 5% и 50%.3. The method according to claim 2, characterized in that the oxygen content is between 5% and 50%. 4. Способ по любому из пп.1-3, отличающийся тем, что инертным газом является азот (N2).4. The method according to any one of claims 1 to 3, characterized in that the inert gas is nitrogen (N 2 ). 5. Способ по любому из пп.1-3, отличающийся тем, что инертным газом является аргон (Ar).5. The method according to any one of claims 1 to 3, characterized in that the inert gas is argon (Ar). 6. Способ по любому из пп.1-3, отличающийся тем, что участок печи с окислительной атмосферой содержит по меньшей мере частично кислород (О2).6. The method according to any one of claims 1 to 3, characterized in that the section of the furnace with an oxidizing atmosphere contains at least partially oxygen (O 2 ). 7. Способ по любому из пп.1-3, отличающийся тем, что нагревание сляба (1) в печи (2) выполняют за счет индукции.7. The method according to any one of claims 1 to 3, characterized in that the heating of the slab (1) in the furnace (2) is carried out by induction. 8. Способ по любому из пп.1-3, отличающийся тем, что непрерывную отливку заготовки выполняют в виде процесса разливки и прокатки.8. The method according to any one of claims 1 to 3, characterized in that the continuous casting of the preform is carried out in the form of a casting and rolling process. 9. Способ по п.8, отличающийся тем, что нагревание сляба (1) выполняют в направлении (F) транспортировки после процесса разливки и перед процессом прокатки.9. The method according to claim 8, characterized in that the heating of the slab (1) is performed in the direction (F) of transportation after the casting process and before the rolling process. 10. Способ по любому из пп.1-3, отличающийся тем, что транспортировку сляба (1) выполняют непрерывно.10. The method according to any one of claims 1 to 3, characterized in that the transportation of the slab (1) is performed continuously. 11. Устройство для непрерывного литья сляба (1), которое содержит печь (2), через которую можно проводить сляб (1), при этом имеются средства для удаления окалины, с помощью которых можно удалять окалину с поверхности сляба, отличающееся тем, что печь (2) имеет по меньшей мере два участка (3, 4), при этом имеются средства для поддержания восстановительной атмосферы по меньшей мере на одном участке (3) печи (2) и при этом имеются средства для поддержания окислительной атмосферы по меньшей мере на одном другом участке (4) печи (2).11. A device for continuous casting of a slab (1), which contains a furnace (2) through which it is possible to conduct a slab (1), and there are means for descaling, with which you can remove scale from the surface of the slab, characterized in that the furnace (2) has at least two sections (3, 4), while there are means for maintaining a reducing atmosphere in at least one section (3) of the furnace (2), and there are means for maintaining an oxidizing atmosphere in at least one another section (4) of the furnace (2). 12. Устройство по п.11, отличающееся тем, что средства для поддержания восстановительной атмосферы содержат по меньшей мере один подводящий трубопровод для водорода (Н2).12. The device according to claim 11, characterized in that the means for maintaining the reducing atmosphere contain at least one supply pipe for hydrogen (H 2 ). 13. Устройство по п.12, отличающееся тем, что средства для поддержания восстановительной атмосферы содержат дополнительно по меньшей мере один подводящий трубопровод для инертного газа.13. The device according to p. 12, characterized in that the means for maintaining the reducing atmosphere contain additionally at least one inlet gas supply line. 14. Устройство по любому из пп.11-13, отличающееся тем, что средства для поддержания окислительной атмосферы содержат по меньшей мере один подводящий трубопровод для кислорода (О2).14. The device according to any one of paragraphs.11-13, characterized in that the means for maintaining an oxidizing atmosphere contain at least one supply pipe for oxygen (O 2 ). 15. Устройство по любому из пп.11-13, отличающееся тем, что печь (2) является муфельной печью.15. Device according to any one of paragraphs.11-13, characterized in that the furnace (2) is a muffle furnace. 16. Устройство по любому из пп.11-13, отличающееся тем, что участки (3, 4) печи образованы стальными трубами.16. Device according to any one of paragraphs.11-13, characterized in that the sections (3, 4) of the furnace are formed by steel pipes. 17. Устройство по любому из пп.11-13, отличающееся тем, что печь (2) содержит индуктивные нагревательные средства. 17. The device according to any one of paragraphs.11-13, characterized in that the furnace (2) contains inductive heating means.
RU2011147471/02A 2009-04-23 2010-04-19 Method and device for continuous slab forming RU2493925C2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102009018683.2 2009-04-23
DE102009018683A DE102009018683A1 (en) 2009-04-23 2009-04-23 Method and device for continuous casting of a slab
PCT/EP2010/002369 WO2010121763A1 (en) 2009-04-23 2010-04-19 Process and apparatus for the continuous casting of a slab

Publications (2)

Publication Number Publication Date
RU2011147471A true RU2011147471A (en) 2013-05-27
RU2493925C2 RU2493925C2 (en) 2013-09-27

Family

ID=42238664

Family Applications (1)

Application Number Title Priority Date Filing Date
RU2011147471/02A RU2493925C2 (en) 2009-04-23 2010-04-19 Method and device for continuous slab forming

Country Status (9)

Country Link
US (1) US20120043049A1 (en)
EP (1) EP2421664A1 (en)
KR (1) KR20110128917A (en)
CN (1) CN102413954A (en)
BR (1) BRPI1013849A2 (en)
DE (1) DE102009018683A1 (en)
RU (1) RU2493925C2 (en)
UA (1) UA100634C2 (en)
WO (1) WO2010121763A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009031236B3 (en) * 2009-06-26 2010-12-02 Salzgitter Flachstahl Gmbh Producing steel strip by strip casting, comprises placing metal melt from feed vessel to rotating casting strip of horizontal strip casting system by casting groove and siphon-like outlet area formed as casting nozzle under protective gas
EP2524971A1 (en) 2011-05-20 2012-11-21 Siemens VAI Metals Technologies GmbH Method and device for preparing steel milled goods before hot rolling
AT511429B1 (en) * 2011-06-10 2012-12-15 Siemens Vai Metals Tech Gmbh METHOD AND DEVICE FOR PRE-TREATING A ROLLING BEFORE ROLLING
EP2687611A1 (en) * 2012-07-17 2014-01-22 Linde Aktiengesellschaft Method and apparatus for controlling surface porosity of metal materials
JP6431796B2 (en) * 2015-03-20 2018-11-28 昭和電工株式会社 Aluminum bar and manufacturing method thereof
WO2016180882A1 (en) * 2015-05-11 2016-11-17 Sms Group Gmbh Method for producing a metallic strip in a casting and rolling process
AT519277A1 (en) * 2016-11-03 2018-05-15 Primetals Technologies Austria GmbH Casting and rolling plant
CN107030121B (en) * 2017-04-13 2019-03-29 杭州电子科技大学 A kind of quick self-adapted temperature control method of continuous casting billet induction heating
CN111702010B (en) * 2020-06-23 2022-03-11 中冶赛迪工程技术股份有限公司 Production process of thin strip by continuous casting and rolling
IT202000016120A1 (en) * 2020-07-03 2022-01-03 Arvedi Steel Eng S P A PLANT AND PROCEDURE FOR THE CONTINUOUS PRODUCTION OF HOT ROLLED ULTRA-THIN STEEL STRIPS

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3771584A (en) * 1971-01-08 1973-11-13 Roblin Industries Method for continuously casting steel billet strands to minimize the porosity and chemical segregation along the center line of the strand
SU840159A1 (en) * 1979-06-07 1981-06-23 Московский Вечерний Металлургическийинститут Method of nonoxidative heating of metal
IT1224318B (en) 1988-05-26 1990-10-04 Mannesmann Ag PROCESS AND PLANT FOR THE CONTINUOUS PRODUCTION OF STEEL BELT
CN1038912C (en) * 1991-08-28 1998-07-01 上海钢铁研究所 Thin strip continuous casting device
AUPN733095A0 (en) * 1995-12-22 1996-01-25 Bhp Steel (Jla) Pty Limited Twin roll continuous caster
DE19613718C1 (en) 1996-03-28 1997-10-23 Mannesmann Ag Process and plant for the production of hot-rolled steel strip
NL1003293C2 (en) * 1996-06-07 1997-12-10 Hoogovens Staal Bv Method and device for manufacturing a steel strip.
JP3246748B2 (en) 1996-06-28 2002-01-15 コラス・スタール・ベー・ブイ Method of manufacturing steel strip or sheet for deep printing
UA28503A (en) * 1997-05-26 2000-10-16 Відкрите Акціонерне Товариство "Металургійний Комбінат "Азовсталь" Method for heating multi-zone continuous furnace
FR2775205B1 (en) * 1998-02-25 2000-03-24 Usinor INSTALLATION FOR MANUFACTURING COLD ROLLED STAINLESS STEEL STRIPS
FR2796966B1 (en) * 1999-07-30 2001-09-21 Ugine Sa PROCESS FOR THE MANUFACTURE OF THIN STRIP OF TRIP-TYPE STEEL AND THIN STRIP THUS OBTAINED
DE19936010B4 (en) * 1999-08-04 2009-04-30 Sms Demag Ag Process and apparatus for suppressing scale formation, in particular secondary scale during hot rolling of slabs
FR2798871B1 (en) * 1999-09-24 2001-11-02 Usinor PROCESS FOR PRODUCING CARBON STEEL STRIPS, ESPECIALLY STEEL FOR PACKAGING, AND STRIPS THUS PRODUCED
DE19959688A1 (en) 1999-12-09 2001-06-13 Agamus Technology & Quality Un Process for heating molded blanks made of metallic materials for rolling and deforming processes comprises using electrical and/or magnetic fields and/or electrical resistance heating in an atmosphere
DE10012801A1 (en) 2000-03-16 2001-09-20 Sms Demag Ag Process and plant for surface treatment of hot-rolled strips or metal sheets
US6622778B1 (en) 2000-07-12 2003-09-23 Danieli Technology, Inc. Method for the direct production of scale-free thin metal strip
RU17359U1 (en) * 2000-09-07 2001-03-27 Открытое акционерное общество Научно-исследовательский институт "Изотерм" MUFEL OF A GAS-FILLED CONVEYOR ELECTRIC FURNACE
KR101029687B1 (en) * 2002-04-12 2011-04-15 카스트립 엘엘씨. Casting steel strip
CN100475982C (en) * 2002-05-08 2009-04-08 Ak钢铁资产公司 Method of continuous casting non-oriented electrical steel strip
CN1487099A (en) * 2003-07-30 2004-04-07 青岛钢铁控股集团有限责任公司 Technological process of making flat spring steel for automobile
CN1972764B (en) 2005-04-07 2011-12-07 乔瓦尼·阿尔韦迪 Process and system for manufacturing metal strips and sheets without solution of continuity between continuous casting and rolling
AT504782B1 (en) 2005-11-09 2008-08-15 Siemens Vai Metals Tech Gmbh METHOD FOR PRODUCING A HOT-ROLLED STEEL STRIP AND COMBINED CASTING AND ROLLING MACHINE TO PERFORM THE METHOD
CN100493745C (en) 2006-06-23 2009-06-03 宝山钢铁股份有限公司 Method for continuously casting sheet band by dual roller

Also Published As

Publication number Publication date
US20120043049A1 (en) 2012-02-23
CN102413954A (en) 2012-04-11
KR20110128917A (en) 2011-11-30
WO2010121763A1 (en) 2010-10-28
RU2493925C2 (en) 2013-09-27
BRPI1013849A2 (en) 2019-09-24
EP2421664A1 (en) 2012-02-29
UA100634C2 (en) 2013-01-10
DE102009018683A1 (en) 2010-10-28

Similar Documents

Publication Publication Date Title
RU2011147471A (en) METHOD AND DEVICE FOR CONTINUOUS CASTING OF SLAB
TW200714718A (en) A method for continuous annealing and hot-dip plating of silicon-containing steel sheet and an apparatus for carrying out the same
ATE440156T1 (en) METHOD FOR CONTINUOUSLY ANNEALING AND PREPARING A STRIP OF HIGH-STRENGTH STEEL FOR THE PURPOSE OF HOT-DIP GALVANIZING THE STRIP
MX2008009968A (en) Method for the production of a foamed slag in a metal bath.
CN102031339A (en) Molten iron slagging-off method
ZA200807811B (en) Method and equipment for treating process gas
EA201101161A1 (en) METHOD OF TRANSPORTATION OF RAILS AND MACHINE FOR ITS IMPLEMENTATION
JP2005538253A5 (en)
UA104791C2 (en) Method and device for treatment of slabs in production line
TW200632112A (en) Ultra-low-carbon steel sheet excellent in surface property, workability and formability and method for producing ultra-low-carbon cast slab
DE502005008001D1 (en) DEVICE FOR MANUFACTURING LIQUID STEEL
Kozyrev et al. Improving the reduction and ladle treatment of Electrosteel for rail production
CN104561477A (en) Steel plate stacking and slow-cooling method for improving flaw detection qualification rate of medium plates
RU2012119544A (en) DEGASATION OF MARTENSITAL STAINLESS STEEL BEFORE REFINING UNDER THE SLAG LAYER
JP2010065262A (en) Soaking annealing treatment method for high carbon steel
Ardelean et al. Research on Increasing the Nitrogen Removal Efficiency by Changing the Secondary Treatment Parameters
ATE458837T1 (en) METHOD FOR HEAT TREATMENT OF IRON MATERIALS
WO2006045576A3 (en) Method for protecting parts made of creep-resistant steel from corroding
UA98214C2 (en) Method of production of steel high-strength electric-welded single-seam large diameter pipes for main pipelines
RU2640108C1 (en) Method of producing tube steel
Ganoshenko et al. Production of plates for large-diameter pipes.
Shcherbina et al. Technology for smelting and ladle treatment of steel.
RU2446216C1 (en) Method of metal degassing in ladle
TH142646A (en) Methods of removing sulfur from steel
Dyudkin On prospects for improving the quality of metal in Ukraine

Legal Events

Date Code Title Description
MM4A The patent is invalid due to non-payment of fees

Effective date: 20140420