KR20040058682A - 자기특성이 우수한 방향성 전기강판의 제조방법 - Google Patents
자기특성이 우수한 방향성 전기강판의 제조방법 Download PDFInfo
- Publication number
- KR20040058682A KR20040058682A KR1020020085053A KR20020085053A KR20040058682A KR 20040058682 A KR20040058682 A KR 20040058682A KR 1020020085053 A KR1020020085053 A KR 1020020085053A KR 20020085053 A KR20020085053 A KR 20020085053A KR 20040058682 A KR20040058682 A KR 20040058682A
- Authority
- KR
- South Korea
- Prior art keywords
- steel sheet
- nitriding
- temperature
- annealing
- nitrogen content
- Prior art date
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Classifications
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- 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
- C21D8/1222—Hot rolling
-
- 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
- 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
- C21D8/1261—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 following hot rolling
-
- 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
- C21D8/1266—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 between cold rolling steps
-
- 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
- C21D8/1277—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular surface treatment
- C21D8/1283—Application of a separating or insulating coating
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
Abstract
Description
Claims (2)
- 방향성 전기강판의 제조방법에 있어서,슬라브를 1300℃ 이하의 온도로 재가열한 다음 열간압연하는 단계,상기 열연판을 열연판 소둔하는 단계,상기 소둔판을 1회의 냉간압연 또는 냉간압연 사이에 중간소둔을 포함하는 2회 이상의 냉간압연을 실시하는 단계,상기 냉연판을 수분을 포함하는 암모니아 혼합가스로 구성된 800~900℃의 분위기에서 동시 탈탄질화처리하거나 탈탄한 후 질화처리하는 단계,상기 동시 탈탄질화처리 온도 또는 질화처리 온도를 하기 수학식 1에 대입하여 결정립 크기를 예측하는 단계,[수학식 1]ASTM 입도번호(결정립 크기) = -0.0153 × T(℃) + 20.253(단, T는 동시 탈탄질화처리 온도 또는 질화처리 온도)상기 동시 탈탄질화처리 또는 탈탄후 질화처리된 강판의 철손(W15/50)을 측정하는 단계,상기 예측된 결정립 크기와 측정된 강판의 철손으로부터 하기 수학식 2를 이용하여 강판의 질소 함량을 예측하는 단계,[수학식 2]N(ppm) = [W15/50- 0.3395 × ASTM 입도번호 - 0.1437] / 0.0103상기 예측된 질소 함량을 근거로 하여 동시 탈탄질화처리 또는 질화처리 후의 강판의 질소 함량이 100~500ppm이 되도록 암모니아 가스의 유량을 증감하여 동시 탈탄질화처리 또는 질화처리 분위기를 조절하고 동시 탈탄질화처리 온도 및 질화처리 온도를 정하는 단계,상기와 같이 정해진 동시 탈탄질화처리 또는 질화처리 분위기 및 동시 탈탄질화처리 온도 또는 질화처리 온도로 동시 탈탄질화처리 또는 탈탄후 질화처리하는 단계 및소둔분리제를 도포하여 최종소둔하는 단계를 포함하여 이루어지는 자기특성이 우수한 방향성 전기강판의 제조방법.
- 제1항에 있어서, 상기 열간압연 후 열연판 소둔을 생략하는 것을 특징으로 하는 자기특성이 우수한 방향성 전기강판의 제조방법.
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KR1020020085053A KR100940720B1 (ko) | 2002-12-27 | 2002-12-27 | 자기특성이 우수한 방향성 전기강판의 제조방법 |
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KR1020020085053A KR100940720B1 (ko) | 2002-12-27 | 2002-12-27 | 자기특성이 우수한 방향성 전기강판의 제조방법 |
Publications (2)
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KR20040058682A true KR20040058682A (ko) | 2004-07-05 |
KR100940720B1 KR100940720B1 (ko) | 2010-02-08 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101353554B1 (ko) * | 2011-12-21 | 2014-01-23 | 주식회사 포스코 | 방향성 전기강판 및 그 제조방법 |
WO2017111432A1 (ko) * | 2015-12-21 | 2017-06-29 | 주식회사 포스코 | 방향성 전기강판 및 이의 제조방법 |
Family Cites Families (4)
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JPH07122096B2 (ja) * | 1990-11-07 | 1995-12-25 | 新日本製鐵株式会社 | 磁気特性、皮膜特性ともに優れた一方向性電磁鋼板の製造方法 |
JP2519615B2 (ja) * | 1991-09-26 | 1996-07-31 | 新日本製鐵株式会社 | 磁気特性の優れた方向性電磁鋼板の製造方法 |
JP3368310B2 (ja) * | 1995-03-31 | 2003-01-20 | 新日本製鐵株式会社 | 磁気特性の優れた一方向性電磁鋼板の製造方法 |
JP4653266B2 (ja) | 1998-10-22 | 2011-03-16 | 新日本製鐵株式会社 | 一方向性電磁鋼板の製造方法 |
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- 2002-12-27 KR KR1020020085053A patent/KR100940720B1/ko active IP Right Grant
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101353554B1 (ko) * | 2011-12-21 | 2014-01-23 | 주식회사 포스코 | 방향성 전기강판 및 그 제조방법 |
WO2017111432A1 (ko) * | 2015-12-21 | 2017-06-29 | 주식회사 포스코 | 방향성 전기강판 및 이의 제조방법 |
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KR100940720B1 (ko) | 2010-02-08 |
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