KR20120121811A - 고강도 강판 및 그 제조 방법 - Google Patents
고강도 강판 및 그 제조 방법 Download PDFInfo
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- KR20120121811A KR20120121811A KR1020110039841A KR20110039841A KR20120121811A KR 20120121811 A KR20120121811 A KR 20120121811A KR 1020110039841 A KR1020110039841 A KR 1020110039841A KR 20110039841 A KR20110039841 A KR 20110039841A KR 20120121811 A KR20120121811 A KR 20120121811A
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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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties of ferrous metals or ferrous alloys 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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
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- 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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- 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
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- 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
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- 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
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- 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
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- 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
-
- 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
- C21D2211/008—Martensite
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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)
- Chemical Kinetics & Catalysis (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
본 발명에 따른 고강도 강판 제조 방법은 중량%로, 탄소(C) : 0.04~0.15%, 실리콘(Si) : 0.2~1.0%, 망간(Mn) : 1.0~2.5%, 티타늄(Ti) : 0.03~0.15%, 니오븀(Nb) : 0.03~0.15%, 바나듐(V) : 0.01~0.15%, 몰리브덴(Mo) : 0.1~0.5%, 알루미늄(Al) : 0.01~0.1%, 보론(B) : 0.001~0.003%, 인(P) : 0.03% 이하, 황(S) : 0.005% 이하 및 나머지 철(Fe)과 불가피한 불순물로 이루어지는 슬라브 판재를 열간압연하는 단계; 상기 열간압연된 판재를 베이나이트 영역 또는 마르텐사이트 영역까지 냉각하는 단계; 및 상기 냉각된 판재를 용융도금하는 단계;를 포함하는 것을 특징으로 한다.
Description
도 2는 도 1에 도시된 냉각 과정의 예를 나타낸 것이다.
도 3은 실시예 1에 따라 제조된 시편에 대한 인장시험 결과를 스트레인-스트레스 커브로 나타낸 것이다.
S110 : 열간압연 단계
S120 : 냉각 단계
S130 : 용융도금 단계
Claims (12)
- 중량%로, 탄소(C) : 0.04~0.15%, 실리콘(Si) : 0.2~1.0%, 망간(Mn) : 1.0~2.5%, 티타늄(Ti) : 0.03~0.15%, 니오븀(Nb) : 0.03~0.15%, 바나듐(V) : 0.01~0.15%, 몰리브덴(Mo) : 0.1~0.5%, 알루미늄(Al) : 0.01~0.1%, 보론(B) : 0.001~0.003% 및 나머지 철(Fe)과 불가피한 불순물로 이루어지는 슬라브 판재를 열간압연하는 단계;
상기 열간압연된 판재를 베이나이트 영역 또는 마르텐사이트 영역까지 냉각하는 단계; 및
상기 냉각된 판재를 용융도금하는 단계;를 포함하는 것을 특징으로 하는 고강도 강판 제조 방법.
- 제1항에 있어서,
상기 슬라브 판재에는
인(P) : 0.03% 이하 및 황(S) : 0.005% 이하가 포함되어 있는 것을 특징으로 하는 고강도 강판 제조 방법.
- 제1항에 있어서,
상기 열간압연 전에, 상기 슬라브 판재를 1180~1250℃로 재가열하는 단계;를 더 포함하는 것을 특징으로 하는 고강도 강판 제조 방법.
- 제1항에 있어서,
상기 열간압연 단계는
860 ~ 920℃의 마무리압연온도로 실시되는 것을 특징으로 하는 고강도 강판 제조 방법.
- 제1항에 있어서,
상기 냉각 단계는
400~650℃까지 수냉 방식으로 실시되는 것을 특징으로 하는 고강도 강판 제조 방법.
- 제5항에 있어서,
상기 냉각 단계는
50 ~ 200 ℃/sec의 냉각 속도로 실시되는 것을 특징으로 하는 고강도 강판 제조 방법.
- 제1항에 있어서,
상기 용융도금 단계는
상기 냉각된 판재를 450~550℃에서 용융아연도금하는 것을 특징으로 하는 고강도 강판 제조 방법.
- 제1항에 있어서,
상기 용융도금 단계는
상기 냉각된 판재를 450~500℃에서 용융아연도금한 후, 500~550℃에서 합금화열처리하는 것을 특징으로 하는 고강도 강판 제조 방법.
- 중량%로, 탄소(C) : 0.04~0.15%, 실리콘(Si) : 0.2~1.0%, 망간(Mn) : 1.0~2.5%, 티타늄(Ti) : 0.03~0.15%, 니오븀(Nb) : 0.03~0.15%, 바나듐(V) : 0.01~0.15%, 몰리브덴(Mo) : 0.1~0.5%, 알루미늄(Al) : 0.01~0.1%, 보론(B) : 0.001~0.003% 및 나머지 철(Fe)과 불가피한 불순물로 이루어지고,
표면에 용융도금층이 형성되어 있으며,
인장강도(TS) : 980 ~ 1100 MPa, 홀 확장률(HER) : 50~65% 및 연신율(EL) : 11 ~ 15%를 갖는 것을 특징으로 하는 고강도 강판.
- 제9항에 있어서,
상기 강판에는
인(P) : 0.03% 이하 및 황(S) : 0.005% 이하가 포함되어 있는 것을 특징으로 하는 고강도 강판.
- 제9항에 있어서,
상기 강판은
페라이트 및 템퍼드 마르텐사이트를 포함하는 복합조직 또는 페라이트 및 템퍼드 베이나이트를 포함하는 복합조직을 갖는 것을 특징으로 하는 고강도 강판.
- 제9항에 있어서,
상기 용융도금층은
용융아연도금층 또는 합금화용융아연도금층인 것을 특징으로 하는 고강도 강판.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020110039841A KR20120121811A (ko) | 2011-04-27 | 2011-04-27 | 고강도 강판 및 그 제조 방법 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020110039841A KR20120121811A (ko) | 2011-04-27 | 2011-04-27 | 고강도 강판 및 그 제조 방법 |
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| Publication Number | Publication Date |
|---|---|
| KR20120121811A true KR20120121811A (ko) | 2012-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020110039841A Ceased KR20120121811A (ko) | 2011-04-27 | 2011-04-27 | 고강도 강판 및 그 제조 방법 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101725274B1 (ko) * | 2015-10-16 | 2017-04-10 | 삼화스틸(주) | 고강도 강판 및 그 제조방법 |
| KR20180031693A (ko) * | 2015-07-17 | 2018-03-28 | 잘쯔기터 플래시슈탈 게엠베하 | Zn-Mg-Al 코팅을 구비한 베이나이트 다중상 강으로 이루어져 있는 열간 스트립을 제조하기 위한 방법 및 상응하는 열간 스트립 |
| CN109182700A (zh) * | 2018-11-06 | 2019-01-11 | 鞍钢股份有限公司 | 汽车用扩孔性能优良的低屈强比热轧钢板及其制造方法 |
| KR20190075589A (ko) * | 2017-12-21 | 2019-07-01 | 주식회사 포스코 | 고항복비형 고강도 강판 및 이의 제조방법 |
| WO2022086049A1 (ko) * | 2020-10-23 | 2022-04-28 | 주식회사 포스코 | 열적 안정성이 우수한 고강도 강판 및 이의 제조방법 |
| JP2023539650A (ja) * | 2020-08-31 | 2023-09-15 | 宝山鋼鉄股▲分▼有限公司 | 980MPaレベルのベイナイト高穴拡げ性鋼及びその製造方法 |
| JP2023539649A (ja) * | 2020-08-31 | 2023-09-15 | 宝山鋼鉄股▲分▼有限公司 | 高強度低炭素マルテンサイト高穴拡げ性鋼及びその製造方法 |
| JP2023539647A (ja) * | 2020-08-31 | 2023-09-15 | 宝山鋼鉄股▲分▼有限公司 | 980MPa級の超低炭素マルテンサイトと残留オーステナイト型の超高穴広げ鋼及びその製造方法 |
| EP4206349A4 (en) * | 2020-08-31 | 2024-03-20 | Baoshan Iron & Steel Co., Ltd. | 980 FULL BAINITE STEEL WITH ULTRA HIGH HOLE EXPANSION IN MPA QUALITY AND MANUFACTURING PROCESS THEREOF |
-
2011
- 2011-04-27 KR KR1020110039841A patent/KR20120121811A/ko not_active Ceased
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11512364B2 (en) | 2015-07-17 | 2022-11-29 | Salzgitter Flachstahl Gmbh | Method for producing a hot strip of a bainitic multi-phase steel having a Zn—Mg—Al coating, and a corresponding hot strip |
| KR20180031693A (ko) * | 2015-07-17 | 2018-03-28 | 잘쯔기터 플래시슈탈 게엠베하 | Zn-Mg-Al 코팅을 구비한 베이나이트 다중상 강으로 이루어져 있는 열간 스트립을 제조하기 위한 방법 및 상응하는 열간 스트립 |
| WO2017065371A1 (ko) * | 2015-10-16 | 2017-04-20 | 삼화스틸(주) | 고강도 강판 및 그 제조방법 |
| KR101725274B1 (ko) * | 2015-10-16 | 2017-04-10 | 삼화스틸(주) | 고강도 강판 및 그 제조방법 |
| KR20190075589A (ko) * | 2017-12-21 | 2019-07-01 | 주식회사 포스코 | 고항복비형 고강도 강판 및 이의 제조방법 |
| CN109182700A (zh) * | 2018-11-06 | 2019-01-11 | 鞍钢股份有限公司 | 汽车用扩孔性能优良的低屈强比热轧钢板及其制造方法 |
| JP2023539650A (ja) * | 2020-08-31 | 2023-09-15 | 宝山鋼鉄股▲分▼有限公司 | 980MPaレベルのベイナイト高穴拡げ性鋼及びその製造方法 |
| JP2023539649A (ja) * | 2020-08-31 | 2023-09-15 | 宝山鋼鉄股▲分▼有限公司 | 高強度低炭素マルテンサイト高穴拡げ性鋼及びその製造方法 |
| JP2023539647A (ja) * | 2020-08-31 | 2023-09-15 | 宝山鋼鉄股▲分▼有限公司 | 980MPa級の超低炭素マルテンサイトと残留オーステナイト型の超高穴広げ鋼及びその製造方法 |
| EP4206350A4 (en) * | 2020-08-31 | 2024-03-13 | Baoshan Iron & Steel Co., Ltd. | HIGH STRENGTH MARTENSITIC STEEL WITH HIGH HOLE EXPANSION AND LOW CARBON CONTENT AND PRODUCTION PROCESS THEREOF |
| EP4206355A4 (en) * | 2020-08-31 | 2024-03-20 | Baoshan Iron & Steel Co., Ltd. | 980 ULTRA HIGH HOLE EXPANSION STEEL WITH EXTREMELY LOW CARBON AND FIXED AUSTENITE STEEL WITH ULTRA HIGH HOLE EXPANSION STEEL AND PROCESS THEREOF |
| EP4206349A4 (en) * | 2020-08-31 | 2024-03-20 | Baoshan Iron & Steel Co., Ltd. | 980 FULL BAINITE STEEL WITH ULTRA HIGH HOLE EXPANSION IN MPA QUALITY AND MANUFACTURING PROCESS THEREOF |
| EP4206351A4 (en) * | 2020-08-31 | 2024-03-20 | Baoshan Iron & Steel Co., Ltd. | 980 BAINITE STEEL WITH HIGH HOLE EXPANSION IN MPA QUALITY AND MANUFACTURING PROCESS THEREOF |
| WO2022086049A1 (ko) * | 2020-10-23 | 2022-04-28 | 주식회사 포스코 | 열적 안정성이 우수한 고강도 강판 및 이의 제조방법 |
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