RU99106397A - METHOD FOR PRODUCING ELECTROTECHNICAL STEEL TAPE WITH ORIENTED GRAINS FROM THIN FLAT PLANTS - Google Patents

METHOD FOR PRODUCING ELECTROTECHNICAL STEEL TAPE WITH ORIENTED GRAINS FROM THIN FLAT PLANTS

Info

Publication number
RU99106397A
RU99106397A RU99106397/02A RU99106397A RU99106397A RU 99106397 A RU99106397 A RU 99106397A RU 99106397/02 A RU99106397/02 A RU 99106397/02A RU 99106397 A RU99106397 A RU 99106397A RU 99106397 A RU99106397 A RU 99106397A
Authority
RU
Russia
Prior art keywords
paragraphs
temperature
annealing
tape
nitrogen
Prior art date
Application number
RU99106397/02A
Other languages
Russian (ru)
Other versions
RU2194774C2 (en
Inventor
Стефано ФОРТУНАТИ
Стефано ЧИКАЛЕ
Джузеппе АББРУДЗЕЗЕ
Original Assignee
Аччаи Спечьяли Терни С.п.А.
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 IT96RM000606A external-priority patent/IT1285153B1/en
Application filed by Аччаи Спечьяли Терни С.п.А. filed Critical Аччаи Спечьяли Терни С.п.А.
Publication of RU99106397A publication Critical patent/RU99106397A/en
Application granted granted Critical
Publication of RU2194774C2 publication Critical patent/RU2194774C2/en

Links

Claims (12)

1. Способ изготовления ленты из кремнистой стали путем непрерывной разливки, отжига при высокой температуре, горячей прокатки, холодной прокатки в одну или несколько операций с промежуточным отжигом, причем полученную таким образом холоднокатаную ленту отжигают для выполнения первичного отжига и обезуглероживания, покрывают разделителем и отжигают в рулонах в контейнерах для осуществления заключительной вторичной обработки рекристаллизацией, отличающийся следующей последовательностью операций: i) непрерывной разливки тонкой плоской заготовки из стали следующего состава: 2-5,5 вес.% Si, 0,05-0,4 вес. % Mn, <250 млн-1 S + 5,04 Sе, 30-130 млн-1 N, 0,05-0,35 вес.% Cu, 15-300 млн-1 С и 200-400 млн-1 Al, железо остальное и неизбежные примеси, и имеющей толщину 40 - 70 мм, предпочтительно 50 - 60 мм, со скоростью разливки 3-5 м/мин, с перегревом стали при литье при температуре менее 30°С, предпочтительно менее 20°С, и скоростью охлаждения для окончательного затвердения в течение 30-100 с, предпочтительно в течение 30-60 с, с амплитудой колебания литейной формы 1-10 мм и частотой колебаний 200-400 циклов в минуту; ii) выдержки полученных плоских заготовок и их горячей прокатки, после которой охлаждение ленты задерживают, по меньшей мере, на 5 с после выхода ленты из последней клети прокатного стана; iii) непосредственной передачи ленты на холодную прокатку без операции отжига; iv) холодной прокатки в одну или несколько операций, в случае необходимости, с промежуточным отжигом, со степенью обжатия на последней операции, по меньшей мере, 80%, v) непрерывного отжига холоднокатаной ленты в течение времени 100-350 с, при температуре от 850-1050°С, во влажной азотно-водородной газовой среде, с отношением рН2O/рН2, составляющим 0,3-0,7; vi) покрытие ленты разделителем, сматывания в рулон и отжига в контейнерах в газовой среде, имеющей следующие составы во время нагрева: водород, смешанный, по меньшей мере, с 30 об.% азота до температуры 900°С, водород, смешанный, по меньшей мере, с 40 об.% азота, при температуре до 1100-1200°С, и поддержание при этой температуре в чистом водороде.1. A method of manufacturing a silicon steel strip by continuous casting, high temperature annealing, hot rolling, cold rolling in one or more intermediate annealing operations, the cold-rolled tape thus obtained being annealed to perform primary annealing and decarburization, coated with a separator and annealed in rolls in containers for final secondary processing by recrystallization, characterized by the following sequence of operations: i) continuous casting of thin flat th steel billets of the following composition: 2-5.5 wt.% Si, 0.05-0.4 wt. % Mn, <250 mn -1 S + 5,04 Se, 30-130 million -1 N, 0,05-0,35 wt.% Cu, 15-300 million -1 C and 200-400 mn -1 Al iron and the rest and inevitable impurities, and having a thickness of 40 - 70 mm, preferably 50 - 60 mm, with a casting speed of 3-5 m / min, with overheating of the steel when casting at a temperature of less than 30 ° C, preferably less than 20 ° C, and cooling rate for final hardening within 30-100 s, preferably within 30-60 s, with a vibration amplitude of the mold 1-10 mm and a vibration frequency of 200-400 cycles per minute; ii) holding the obtained flat billets and hot rolling them, after which the cooling of the tape is delayed for at least 5 s after the tape leaves the last stand of the rolling mill; iii) direct transfer of the strip for cold rolling without annealing; iv) cold rolling in one or several operations, if necessary, with intermediate annealing, with a degree of reduction in the last operation of at least 80%, v) continuous annealing of cold-rolled strip for a time of 100-350 s, at a temperature of 850 -1050 ° C, in a moist nitrogen-hydrogen gas environment, with a ratio of pH 2 O / pH 2 of 0.3-0.7; vi) coating the tape with a separator, coiling and annealing in containers in a gas medium having the following compositions during heating: hydrogen mixed with at least 30 vol.% nitrogen to a temperature of 900 ° C, hydrogen mixed at least with at least 40 vol.% nitrogen, at temperatures up to 1100-1200 ° C, and maintaining at this temperature in pure hydrogen. 2. Способ по п. 1, в котором во время горячей прокатки плоские заготовки прокатывают при начальной температуре 1000 - 1200°С и окончательной температуре 850 - 1050°С. 2. The method according to p. 1, in which during hot rolling flat billets are rolled at an initial temperature of 1000 - 1200 ° C and a final temperature of 850 - 1050 ° C. 3. Способ по любому из пп. 1 и 2, в котором содержание углерода в стали составляет 15-100 млн-1.3. The method according to any one of paragraphs. 1 and 2, wherein the carbon content of the steel is 15-100 mn -1. 4. Способ по любому из пп. 1-3, в котором содержание меди в стали составляет 800-2000 млн-1.4. The method according to any one of paragraphs. 1-3, in which the copper content in the steel is 800-2000 million -1 . 5. Способ по любому из пп. 1-4, в котором параметры непрерывного литья выбирают так, чтобы получить равноосность пропорции столбчатых кристаллов, равную 35-75%. 5. The method according to any one of paragraphs. 1-4, in which the parameters of continuous casting are chosen so as to obtain equiaxial proportions of columnar crystals equal to 35-75%. 6. Способ по любому из пп. 1-5, в котором равноосность пропорции столбчатых кристаллов составляет больше 50%. 6. The method according to any one of paragraphs. 1-5, in which the equiaxial proportion of columnar crystals is more than 50%. 7. Способ по любому из пп. 1-6, в котором размеры равноосных зерен меньше 1,5 мм. 7. The method according to any one of paragraphs. 1-6, in which the dimensions of the equiaxed grains are less than 1.5 mm. 8. Способ по любому из пп. 1-7, в котором средние размеры вторичных фаз меньше 0,06 мкм. 8. The method according to any one of paragraphs. 1-7, in which the average size of the secondary phases is less than 0.06 microns. 9. Способ по любому из пп. 1-8, в котором во время обезуглероживающего отжига температуру поддерживают ниже 950°С, а содержание азота в газовой среде последующего отжига в контейнерах изменяют таким образом, чтобы обеспечить количество азота для диффундирования в ленту менее 50 млн-1.9. The method according to any one of paragraphs. 1-8, in which during the decarburization annealing the temperature is maintained below 950 ° C, and the nitrogen content in the atmosphere following box annealing is changed so as to ensure the amount of nitrogen to diffuse into the ribbon at least 50 million -1. 10. Способ по любому из пп. 1-8, в котором после обезуглероживающего отжига ленту непрерывно обрабатывают при температуре 900 - 1050°С в азотирующей газовой среде. 10. The method according to any one of paragraphs. 1-8, in which, after decarburization annealing, the tape is continuously treated at a temperature of 900-1050 ° C in a nitriding gas medium. 11. Способ по п. 10, в котором азотирующая газовая среда содержит NH3 до 10 об.% и водяной пар в количестве, составляющем 0,5 - 100 г/м3.11. The method according to p. 10, in which the nitriding gas medium contains NH 3 up to 10 vol.% And water vapor in an amount of 0.5 to 100 g / m 3 . 12. Способ по любому из пп. 1-11, в котором во время последней операции холодной прокатки поддерживают температуру, равную, по меньшей мере, 200°С, по меньшей мере, в двух проходах прокатки. 12. The method according to any one of paragraphs. 1-11, in which, during the last cold rolling operation, a temperature of at least 200 ° C. is maintained in at least two rolling passes.
RU99106397/02A 1996-09-05 1997-07-24 Method of producing strip from electrical steel with oriented grains from sheet slabs RU2194774C2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT96RM000606A IT1285153B1 (en) 1996-09-05 1996-09-05 PROCEDURE FOR THE PRODUCTION OF GRAIN ORIENTED MAGNETIC SHEET, STARTING FROM THIN SHEET.
ITRM96A000606 1996-09-05

Publications (2)

Publication Number Publication Date
RU99106397A true RU99106397A (en) 2001-01-20
RU2194774C2 RU2194774C2 (en) 2002-12-20

Family

ID=11404410

Family Applications (1)

Application Number Title Priority Date Filing Date
RU99106397/02A RU2194774C2 (en) 1996-09-05 1997-07-24 Method of producing strip from electrical steel with oriented grains from sheet slabs

Country Status (18)

Country Link
US (1) US6273964B1 (en)
EP (1) EP0925376B1 (en)
JP (1) JP2000517380A (en)
KR (1) KR100524442B1 (en)
CN (1) CN1073165C (en)
AT (1) ATE196781T1 (en)
AU (1) AU4116097A (en)
BR (1) BR9712010A (en)
CZ (1) CZ292917B6 (en)
DE (1) DE69703248T2 (en)
ES (1) ES2153213T3 (en)
GR (1) GR3035164T3 (en)
IN (1) IN192926B (en)
IT (1) IT1285153B1 (en)
PL (1) PL182835B1 (en)
RU (1) RU2194774C2 (en)
SK (1) SK283772B6 (en)
WO (1) WO1998010104A1 (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1290978B1 (en) 1997-03-14 1998-12-14 Acciai Speciali Terni Spa PROCEDURE FOR CHECKING THE INHIBITION IN THE PRODUCTION OF GRAIN ORIENTED MAGNETIC SHEET
EP0947597B2 (en) 1998-03-30 2015-06-10 Nippon Steel & Sumitomo Metal Corporation Method of producing a grain-oriented electrical steel sheet excellent in magnetic characteristics
IT1316029B1 (en) * 2000-12-18 2003-03-26 Acciai Speciali Terni Spa ORIENTED GRAIN MAGNETIC STEEL PRODUCTION PROCESS.
IT1316030B1 (en) * 2000-12-18 2003-03-26 Acciai Speciali Terni Spa PROCEDURE FOR THE MANUFACTURE OF ORIENTED GRAIN SHEETS.
US20050070961A1 (en) * 2003-07-15 2005-03-31 Terumo Kabushiki Kaisha Energy treatment apparatus
CN100389222C (en) * 2005-12-13 2008-05-21 武汉钢铁(集团)公司 Production method for improving electromagnetic performance and bottom layer quality of copper containing orientation silicium steel
JP4823719B2 (en) * 2006-03-07 2011-11-24 新日本製鐵株式会社 Method for producing grain-oriented electrical steel sheet with extremely excellent magnetic properties
CN100436042C (en) * 2006-05-18 2008-11-26 武汉科技大学 Thin slab process high magnetic induction oriented electrical steel sheet and its manufacturing method
CN101545072B (en) * 2008-03-25 2012-07-04 宝山钢铁股份有限公司 Method for producing oriented silicon steel having high electromagnetic performance
CN101348854B (en) * 2008-09-05 2010-12-22 首钢总公司 Method for producing oriented electrical steel by low temperature heating
IT1396714B1 (en) 2008-11-18 2012-12-14 Ct Sviluppo Materiali Spa PROCEDURE FOR THE PRODUCTION OF MAGNETIC SHEET WITH ORIENTED GRAIN FROM THE THIN BRAMMA.
CN101768697B (en) 2008-12-31 2012-09-19 宝山钢铁股份有限公司 Method for manufacturing oriented silicon steel with one-step cold rolling method
IT1402624B1 (en) 2009-12-23 2013-09-13 Ct Sviluppo Materiali Spa PROCEDURE FOR THE PRODUCTION OF MAGNETIC SIDES WITH ORIENTED GRAIN.
CN101775547B (en) * 2009-12-31 2012-11-21 武汉钢铁(集团)公司 Production method of high magnetic induction grain-oriented silicon steel strip
DE102011054004A1 (en) * 2011-09-28 2013-03-28 Thyssenkrupp Electrical Steel Gmbh Method for producing a grain-oriented electrical tape or sheet intended for electrical applications
CN102517429B (en) * 2011-12-26 2013-09-18 武汉钢铁(集团)公司 Method for producing high-magnetic-induction oriented silicon steel by continuous casting and rolling of thin slab
EP2876173B9 (en) * 2012-07-20 2019-06-19 Nippon Steel & Sumitomo Metal Corporation Manufacturing method of grain-oriented electrical steel sheet
CN103695619B (en) * 2012-09-27 2016-02-24 宝山钢铁股份有限公司 A kind of manufacture method of high magnetic strength common orientation silicon steel
CN105579596B (en) 2013-09-26 2018-01-09 杰富意钢铁株式会社 The manufacture method of orientation electromagnetic steel plate
DE102014112286A1 (en) * 2014-08-27 2016-03-03 Thyssenkrupp Ag Method for producing an embroidered packaging steel
CN104805353A (en) * 2015-05-07 2015-07-29 马钢(集团)控股有限公司 Electrical steel with excellent longitudinal magnetic property and production method thereof
CN104846177B (en) * 2015-06-18 2017-08-08 北京科技大学 A kind of method that utilization continuous annealing prepares low cost oriented silicon steel
KR101707451B1 (en) * 2015-12-22 2017-02-16 주식회사 포스코 Grain oriented electrical steel sheet and method for manufacturing the same
EP3536813B1 (en) * 2016-11-01 2020-12-23 JFE Steel Corporation Method for producing grain-oriented electrical steel sheet
CN107858633A (en) * 2017-12-26 2018-03-30 武汉钢铁有限公司 A kind of sensing heating nitriding method of orientation silicon steel
CN111531138B (en) * 2020-06-10 2021-12-14 武汉钢铁有限公司 Method for producing non-oriented electrical steel by thin slab continuous casting and rolling
KR20240098943A (en) * 2022-12-21 2024-06-28 주식회사 포스코 Grain oriented thin electrical steel sheet and method for the same

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2130241B (en) * 1982-09-24 1986-01-15 Nippon Steel Corp Method for producing a grain-oriented electrical steel sheet having a high magnetic flux density
DE69025417T3 (en) * 1989-04-04 2000-03-30 Nippon Steel Corp., Tokio/Tokyo Process for the production of grain-oriented electrical steel sheets with excellent magnetic properties
DE4311151C1 (en) * 1993-04-05 1994-07-28 Thyssen Stahl Ag Grain-orientated electro-steel sheets with good properties
JP3063518B2 (en) * 1993-12-27 2000-07-12 株式会社日立製作所 Continuous casting device and continuous casting system
JPH08225843A (en) * 1995-02-15 1996-09-03 Nippon Steel Corp Production of grain-oriented silicon steel sheet

Similar Documents

Publication Publication Date Title
RU99106397A (en) METHOD FOR PRODUCING ELECTROTECHNICAL STEEL TAPE WITH ORIENTED GRAINS FROM THIN FLAT PLANTS
RU2194775C2 (en) Method of producing grain-oriented electrical strip steel with high magnetic characteristics beginning from thin slabs
RU99106588A (en) METHOD FOR PRODUCING TEXTURED ELECTROTECHNICAL STRIP STEEL WITH HIGH MAGNETIC CHARACTERISTICS, STARTING WITH THIN SLABS
RU2194774C2 (en) Method of producing strip from electrical steel with oriented grains from sheet slabs
JP2728112B2 (en) Manufacturing method of grain-oriented electrical steel sheet with excellent iron loss
RU99116327A (en) METHOD FOR PRODUCING SHEET FROM ELECTRICAL TECHNICAL STEEL WITH ORIENTED GRAIN STRUCTURE AND HIGH MAGNETIC PROPERTIES
US4473416A (en) Process for producing aluminum-bearing grain-oriented silicon steel strip
KR20140044892A (en) Method for producing a grain-oriented electrical steel flat product intended for electrotechnical applications
US3855018A (en) Method for producing grain oriented silicon steel comprising copper
CN108374130B (en) Non-oriented silicon steel and method for producing non-oriented silicon steel by thin slab continuous casting and rolling process
CN1094982C (en) Process for the inhibition control in the production of grain-oriented electrical sheets
JPH0885825A (en) Production of grain oriented silicon steel sheet excellent in magnetic property over entire length of coil
US3575739A (en) Secondary recrystallization of silicon iron with nitrogen
CN100400680C (en) Process for prodn. of grain oriented electrical steel
CZ291194B6 (en) Process for the production of silicon steel strips
JP5005873B2 (en) Method for producing directional electromagnetic steel strip
CA2033059C (en) Process for producing grain oriented silicon steel sheets having excellent magnetic properties
JPS6365402B2 (en)
KR100359752B1 (en) Non-oriented magnetic steel sheet with a low watt loss and method of manufacturing the same
JP2819994B2 (en) Manufacturing method of electrical steel sheet with excellent magnetic properties
JPS5843466B2 (en) Annealing separator for unidirectional silicon steel sheets
SU910805A1 (en) Process for producing isotropic electrical steel
JP2819993B2 (en) Manufacturing method of electrical steel sheet with excellent magnetic properties
JP3067896B2 (en) Method of manufacturing thin slab for unidirectional electrical steel sheet
RU2203967C2 (en) Method of making anisotropic electrical steel