KR970043180A - Manufacturing method of oriented electrical steel sheet excellent in magnetic and decarburization - Google Patents

Manufacturing method of oriented electrical steel sheet excellent in magnetic and decarburization Download PDF

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Publication number
KR970043180A
KR970043180A KR1019950053582A KR19950053582A KR970043180A KR 970043180 A KR970043180 A KR 970043180A KR 1019950053582 A KR1019950053582 A KR 1019950053582A KR 19950053582 A KR19950053582 A KR 19950053582A KR 970043180 A KR970043180 A KR 970043180A
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KR
South Korea
Prior art keywords
steel sheet
oriented electrical
electrical steel
less
grain
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Application number
KR1019950053582A
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Korean (ko)
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KR100256342B1 (en
Inventor
최규승
한규석
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김종진
포항종합제철 주식회사
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Priority to KR1019950053582A priority Critical patent/KR100256342B1/en
Publication of KR970043180A publication Critical patent/KR970043180A/en
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Publication of KR100256342B1 publication Critical patent/KR100256342B1/en

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    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
    • C21D8/1255—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest with diffusion of elements, e.g. decarburising, nitriding
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
    • C21D8/1233—Cold rolling
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)

Abstract

본 발명은 변압기, 전동기, 발전기 및 기타 전기기기등의 철심재료로 사용되는 방향성전기 강판을 저온스라브 가열방식에 의해 제조하는 방법에 관한 것으로써, 제강시 성분중 탄소량을 0.025%이하로 함유시켜 이후 공정에서의 탈탄성을 향상시키고, 2차 냉연율을 증가시켜 강한 가공에너지를 갖게 함으로써, 자성을 향상시킬수 있는 방향성 전기강판의 제조방법을 제공하고자 하는데, 그 목적이 있다. 본 발명은 AIN 을 2차 재결정 성장억제제로하고 저온스라브 가열방식을 적용하여 방향성 전기강판을 제조하는 방법에 있어서, 소강중의 C함량이 0.025이하이고, 그리고 2차 냉간압연율이 58%이상인 자성 및 탈탄성이 우수한 방향성 전기강판의 제조방법을 그 요지로 한다.The present invention relates to a method for manufacturing a grain-oriented electrical steel sheet used as iron core materials for transformers, electric motors, generators, and other electric equipments by low temperature slab heating method, which contains less than 0.025% of carbon in steelmaking components. Since the decarburization in the process, by increasing the secondary cold rolling rate to have a strong processing energy, to provide a method for producing a grain-oriented electrical steel sheet that can improve the magnetic, the purpose is. The present invention provides a method for producing a grain-oriented electrical steel sheet using AIN as a secondary recrystallization inhibitor and applying a low temperature slab heating method, wherein the C content in the steel is 0.025 or less, and the secondary cold rolling rate is 58% or more. And a method for producing a grain-oriented electrical steel sheet excellent in decarburization.

Description

자성 및 탈탄성이 우수한 방향성 전기강판의 제조방법Manufacturing method of oriented electrical steel sheet excellent in magnetic and decarburization

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

Claims (1)

중량%로, Si:2.9-3.3%, P:0.015% 이하, 용존 Al:0.011-0.027%, N:0.0080-0.012%, S:0.007% 이하, Ni 및 Cr 단독 또는 복합:0.06-0.18%, Mn:0.32% 이하, Cu:0.6% 이하, C, 잔부 Fe 및 기타 불가피한 불순물로 조성되는 스라브를 1250-1320℃로 재가열한 후 열간압연을 행하고 이어 1000℃ 이하의 온도에서 열연판 소둔을 행한후, 820-870℃의 습수소분위기에서 행하는 탈탄소둔을 포함한 2회의 냉간압연에 의해 최종 두께로 조정하고, 이어 600℃ 이하에서 회복소둔을 행하는 다음 MgO를 주성분으로하는 융착방지제를 도포하여 권취한 다음, 1180-1220℃까지의 승온구간중의 분위기가스를 20-25%질소함유수소 분위기로하고 1180-1220℃에서의 최고균열온도구간에서의 분위기 가스를 100% 수소분위기로 하고, 균열시간을 총 20시간 이상 행하는 최종마무리소둔을 행한후, 냉각하여 방향성 전기강판을 제조하는 방법에 있어서, 상기 C의 함량이 0.025%이하이고, 그리고 2차 냉간압연율이 58%이상인 것을 특징으로 하는 자성 및 탈탄성이 우수한 방향성 전기강판의 제조방법.By weight, Si: 2.9-3.3%, P: 0.015% or less, dissolved Al: 0.011-0.027%, N: 0.0080-0.012%, S: 0.007% or less, Ni and Cr alone or composite: 0.06-0.18%, After reheating the slab composed of Mn: 0.32% or less, Cu: 0.6% or less, C, balance Fe, and other unavoidable impurities to 1250-1320 ° C, hot rolling is performed, followed by hot rolling annealing at a temperature of 1000 ° C or less. After adjusting to final thickness by two cold rolling including decarbonization annealing at 820-870 ℃, and then recovering annealing at below 600 ℃, apply MgO-based fusion inhibitor and wind up , 20-25% nitrogen-containing hydrogen atmosphere in the elevated temperature range up to 1180-1220 ℃, and 100% hydrogen atmosphere at the highest crack temperature range at 1180-1220 ℃. After finishing finishing annealing for 20 hours or more, it is cooled to produce a grain-oriented electrical steel sheet. In the method, the content of the C 0.025% or less, and the second cold reduction process for producing a 58% magnetic and de-oriented electrical steel sheet excellent in elasticity, characterized in that at least.
KR1019950053582A 1995-12-21 1995-12-21 The manufacturing method for oriented electric steel sheet with magnetic and decarburing property KR100256342B1 (en)

Priority Applications (1)

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KR1019950053582A KR100256342B1 (en) 1995-12-21 1995-12-21 The manufacturing method for oriented electric steel sheet with magnetic and decarburing property

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Application Number Priority Date Filing Date Title
KR1019950053582A KR100256342B1 (en) 1995-12-21 1995-12-21 The manufacturing method for oriented electric steel sheet with magnetic and decarburing property

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KR970043180A true KR970043180A (en) 1997-07-26
KR100256342B1 KR100256342B1 (en) 2000-05-15

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004044252A1 (en) * 2002-11-11 2004-05-27 Posco Method for manufacturing high silicon grain-oriented electrical steel sheet with superior core loss property
KR100900662B1 (en) * 2002-11-11 2009-06-01 주식회사 포스코 Coating composition and, method for manufacturing high silicon grain-oriented electrical steel sheet with superior core loss property using thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100946069B1 (en) * 2002-11-27 2010-03-10 주식회사 포스코 Method for manufacturing high silicon grain-oriented electrical steel sheet with superior magnetic properties

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06256846A (en) * 1993-03-01 1994-09-13 Kawasaki Steel Corp Production of grain oriented electrical steel sheet having stable high magnetic flux density

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004044252A1 (en) * 2002-11-11 2004-05-27 Posco Method for manufacturing high silicon grain-oriented electrical steel sheet with superior core loss property
KR100900662B1 (en) * 2002-11-11 2009-06-01 주식회사 포스코 Coating composition and, method for manufacturing high silicon grain-oriented electrical steel sheet with superior core loss property using thereof

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