KR102684370B1 - 후강판 및 그의 제조 방법 - Google Patents
후강판 및 그의 제조 방법 Download PDFInfo
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- KR102684370B1 KR102684370B1 KR1020217034903A KR20217034903A KR102684370B1 KR 102684370 B1 KR102684370 B1 KR 102684370B1 KR 1020217034903 A KR1020217034903 A KR 1020217034903A KR 20217034903 A KR20217034903 A KR 20217034903A KR 102684370 B1 KR102684370 B1 KR 102684370B1
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/02—Hardening articles or materials formed by forging or rolling, with no further heating beyond that required for the formation
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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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0231—Warm 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
-
- 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
- C21D2201/00—Treatment for obtaining particular effects
- C21D2201/05—Grain orientation
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Description
Claims (3)
- 성분 조성이,
C: 0.020질량%∼0.070질량%,
Si: 0질량% 초과 0.40질량% 이하,
Mn: 1.30질량%∼1.80질량%,
P: 0질량% 초과 0.015질량% 이하,
S: 0질량% 초과 0.005질량% 이하,
Al: 0.005질량%∼0.070질량%,
Nb: 0.015질량%∼0.048질량%,
Ti: 0.005질량%∼0.024질량%,
N: 0.0030질량%∼0.0080질량%, 및
Ca: 0질량% 초과 0.0040질량% 이하
를 만족시키고,
Cu: 0질량% 초과 0.75질량% 이하, 및 Ni: 0질량% 초과 1.4질량% 이하로 이루어지는 군으로부터 선택되는 1종 이상의 원소를 포함하고,
잔부가 Fe 및 불가피 불순물로 이루어지며,
하기 식(1)로부터 구해지는 Di+10Nb: 1.20∼2.50을 만족시키고,
결정 방위차 15° 이상의 대각 입계에 둘러싸이는 결정립 중, 원 상당 직경이 7.5μm 이하인 결정립의 합계 면적 분율 SA가, 판 두께의 1/4 위치에서 34% 이상, 또한 판 두께의 1/2 위치에서 27% 이상이고,
판 두께의 1/4 위치에서의 하기 식(2)로부터 구해지는 Y가 -5200 미만이고, 또한 판 두께의 1/2 위치에서의 Y가 -4700 미만이며,
판 두께는 40mm 이상인 후강판.
Di = 1.16×([C]/10)0.5×(0.7×[Si]+1)×(5.1×([Mn]-1.2)+5)×(0.35×[Cu]+1)×(0.36×[Ni]+1)×(2.16×[Cr]+1)×(3×[Mo]+1)×(1.75×[V]+1)×(200×[B]+1)···(1)
식(1)에 있어서, [C], [Si], [Mn], [Cu], [Ni], [Cr], [Mo], [V] 및 [B]는, 각각, 질량%로 나타낸 C, Si, Mn, Cu, Ni, Cr, Mo, V 및 B의 함유량을 나타내고, 포함하지 않는 원소는 제로로 한다.
Y = 20×vTrs-7×YP···(2)
식(2)에 있어서, vTrs는 취성 연성 천이 온도(℃), YP는 항복 강도(MPa)이다. - 제 1 항에 있어서,
이하의 (i) 및 (ii) 중 어느 하나 이상을 만족하는 후강판.
(i) 추가로,
Mo: 0질량% 초과 0.50질량% 이하,
V: 0질량% 초과 0.060질량% 이하,
Cr: 0질량% 초과 0.8질량% 이하, 및
B: 0질량% 초과 0.0007질량% 이하
로 이루어지는 군으로부터 선택되는 1종 이상의 원소를 포함한다
(ii) 추가로,
REM: 0질량% 초과 0.0060질량% 이하, 및
Zr: 0질량% 초과 0.0050질량% 이하
로 이루어지는 군으로부터 선택되는 1종 이상의 원소를 포함한다 - 제 1 항 또는 제 2 항에 기재된 판 두께가 40mm 이상인 후강판을 제조하는 방법으로서,
제 1 항 또는 제 2 항에 기재된 성분 조성을 갖는 강편을, 1020℃ 초과 1200℃ 미만으로 가열하는 공정과, 상기 가열 후의 열간 압연 공정을 포함하고,
상기 열간 압연 공정은, 압연 패스수를 3패스 이상으로 하고, 또한 하기 (a)∼(d)의 조건을 모두 만족시키도록, 열간 압연과 해당 열간 압연 후의 냉각을 행하는 후강판의 제조 방법.
(a) 850℃ 이하의 온도역에서의 누적 압하율이 40% 이상
(b) 최종 3패스의 압연의 평균 압하율이 5.8% 이상
(c) 마무리 압연 온도가 720∼830℃
(d) 열간 압연 후, 마무리 압연 온도∼690℃의 냉각 개시 온도부터, 320∼550℃의 냉각 정지 온도까지를, 평균 냉각 속도 0.5∼20℃/s로 냉각한다.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JPJP-P-2019-081271 | 2019-04-22 | ||
| JP2019081271 | 2019-04-22 | ||
| JPJP-P-2020-007626 | 2020-01-21 | ||
| JP2020007626A JP7398970B2 (ja) | 2019-04-22 | 2020-01-21 | 厚鋼板およびその製造方法 |
| PCT/JP2020/014612 WO2020217873A1 (ja) | 2019-04-22 | 2020-03-30 | 厚鋼板およびその製造方法 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20210142184A KR20210142184A (ko) | 2021-11-24 |
| KR102684370B1 true KR102684370B1 (ko) | 2024-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020217034903A Active KR102684370B1 (ko) | 2019-04-22 | 2020-03-30 | 후강판 및 그의 제조 방법 |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3940103A4 (ko) |
| JP (1) | JP7398970B2 (ko) |
| KR (1) | KR102684370B1 (ko) |
| CN (1) | CN113840933B (ko) |
| WO (1) | WO2020217873A1 (ko) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116014309A (zh) | 2021-10-22 | 2023-04-25 | 株式会社Lg新能源 | 圆筒形电池、应用于其的集电板、包括其的电池组及汽车 |
| CN114277314B (zh) * | 2021-12-02 | 2022-12-09 | 莱芜钢铁集团银山型钢有限公司 | 一种耐腐蚀大线能量焊接海洋工程用高强度钢板及其制备方法 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101726082B1 (ko) * | 2015-12-04 | 2017-04-12 | 주식회사 포스코 | 취성균열전파 저항성 및 용접부 취성균열개시 저항성이 우수한 고강도 강재 및 그 제조방법 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08158006A (ja) * | 1994-12-06 | 1996-06-18 | Kobe Steel Ltd | 溶接熱影響部の靭性が優れた高強度鋼 |
| JP2007270194A (ja) | 2006-03-30 | 2007-10-18 | Jfe Steel Kk | 耐sr特性に優れた高強度鋼板の製造方法 |
| JP4605117B2 (ja) | 2006-07-25 | 2011-01-05 | 住友金属工業株式会社 | Lpg・アンモニア運搬船用タンクに用いられる鋼材 |
| KR100851189B1 (ko) * | 2006-11-02 | 2008-08-08 | 주식회사 포스코 | 저온인성이 우수한 초고강도 라인파이프용 강판 및 그제조방법 |
| JP5031531B2 (ja) | 2007-11-20 | 2012-09-19 | 新日本製鐵株式会社 | 母材低温靭性およびhaz低温靭性に優れた低降伏比高張力鋼板とその製造方法 |
| JP4874435B2 (ja) | 2010-02-08 | 2012-02-15 | 新日本製鐵株式会社 | 厚鋼板の製造方法 |
| JP5533024B2 (ja) | 2010-02-26 | 2014-06-25 | Jfeスチール株式会社 | 低温靭性に優れた厚肉高張力熱延鋼板の製造方法 |
| JP5833964B2 (ja) * | 2012-03-29 | 2015-12-16 | 株式会社神戸製鋼所 | 曲げ加工性、衝撃特性および引張特性に優れた鋼板およびその製造方法 |
| KR20150002884A (ko) * | 2012-05-21 | 2015-01-07 | 제이에프이 스틸 가부시키가이샤 | 취성 균열 전파 정지 특성이 우수한 구조용 고강도 후강판 및 그 제조 방법 |
| WO2014162680A1 (ja) * | 2013-04-04 | 2014-10-09 | Jfeスチール株式会社 | 熱延鋼板およびその製造方法 |
| JP6196929B2 (ja) * | 2014-04-08 | 2017-09-13 | 株式会社神戸製鋼所 | 極低温でのhaz靱性に優れた厚鋼板 |
| JP6763141B2 (ja) | 2015-02-10 | 2020-09-30 | 日本製鉄株式会社 | Lpgタンク用鋼板の製造方法 |
| EP3686303B1 (en) | 2017-09-19 | 2021-12-29 | Nippon Steel Corporation | Steel pipe and steel plate |
| JP2019081271A (ja) | 2017-10-30 | 2019-05-30 | クラレプラスチックス株式会社 | ホワイトボードおよび映写スクリーン兼用フィルム |
| JP7100318B2 (ja) | 2018-07-11 | 2022-07-13 | Tnk水道コンサルタント株式会社 | 硫酸腐食耐性コンクリート系管、コンクリート系管の硫酸腐食防止方法及び鉄筋の防食方法 |
-
2020
- 2020-01-21 JP JP2020007626A patent/JP7398970B2/ja active Active
- 2020-03-30 EP EP20794425.7A patent/EP3940103A4/en active Pending
- 2020-03-30 WO PCT/JP2020/014612 patent/WO2020217873A1/ja not_active Ceased
- 2020-03-30 KR KR1020217034903A patent/KR102684370B1/ko active Active
- 2020-03-30 CN CN202080029745.4A patent/CN113840933B/zh active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101726082B1 (ko) * | 2015-12-04 | 2017-04-12 | 주식회사 포스코 | 취성균열전파 저항성 및 용접부 취성균열개시 저항성이 우수한 고강도 강재 및 그 제조방법 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3940103A1 (en) | 2022-01-19 |
| EP3940103A4 (en) | 2022-11-30 |
| JP7398970B2 (ja) | 2023-12-15 |
| KR20210142184A (ko) | 2021-11-24 |
| CN113840933B (zh) | 2022-09-16 |
| CN113840933A (zh) | 2021-12-24 |
| WO2020217873A1 (ja) | 2020-10-29 |
| JP2020176329A (ja) | 2020-10-29 |
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