KR20020041067A - 내덴트성 및 가공성이 우수한 냉연강판 제조방법 - Google Patents
내덴트성 및 가공성이 우수한 냉연강판 제조방법 Download PDFInfo
- Publication number
- KR20020041067A KR20020041067A KR1020000070811A KR20000070811A KR20020041067A KR 20020041067 A KR20020041067 A KR 20020041067A KR 1020000070811 A KR1020000070811 A KR 1020000070811A KR 20000070811 A KR20000070811 A KR 20000070811A KR 20020041067 A KR20020041067 A KR 20020041067A
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- Prior art keywords
- steel sheet
- rolled steel
- less
- cold
- rolling
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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
- C21D8/02—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
- C21D8/0236—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
- C21D8/02—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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0252—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment with application of tension
-
- 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
- C22C38/04—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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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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 Sheet Steel (AREA)
Abstract
Description
비교강과 발명강의 화학성분 및 재질실적 | ||||||||||||
구분 | 화학성분(%) | CT(℃) | 재질실적 | |||||||||
C | Mn | P | S | S0L-AL | Ti | Nb | YP | TS | EL | R | ||
비교1비교2 | 0.0023 | 0.34 | 0.25 | 0.007 | 0.039 | 0.027 | 0.009 | 700600 | 12.812.9 | 32.033.0 | 44.541.3 | 2.01.73 |
비교3비교4 | 0.0035 | 0.34 | 0.25 | 0.007 | 0.051 | 0.032 | 0.009 | 700600 | 12.913.4 | 32.533.8 | 44.041.0 | 2.011.70 |
비교5비교6 | 0.0048 | 0.36 | 0.24 | 0.007 | 0.053 | 0.036 | 0.010 | 700600 | 13.015.0 | 33.235.8 | 43.538.5 | 1.971.60 |
발명1발명2 | 0.0029 | 0.36 | 0.24 | 0.007 | 0.045 | 0.045 | - | 700600 | 12.813.1 | 32.933.4 | 44.943.5 | 1.831.80 |
발명강과 비교강의 열연권취온도 및 소둔온도에 따른 재질실적 | ||||||
구분 | 열연권취온도(℃) | CAL소둔온도(℃) | 재질실적 | |||
YP | TS | EL | R | |||
비교3비교3-1 | 700 | 800820840 | 12.912.811.9 | 32.532.432.0 | 44.044.045.0 | 2.012.082.10 |
비교4비교4-1 | 600 | 800820840 | 13.413.212.0 | 33.833.733.0 | 41.041.342.0 | 1.701.721.77 |
발명1발명1-1 | 700 | 800820840 | 12.812.512.2 | 32.932.532.3 | 44.945.645.6 | 1.832.032.10 |
발명2발명2-1 | 600 | 800820840 | 13.113.012.3 | 33.433.232.6 | 43.544.544.8 | 1.801.821.85 |
발명강의 현장생산재(광양1냉연)와 기존 극저IF 냉연강판의 재질실적 | |||||||||
구분 | 화학성분(%) | 재질실적 | |||||||
C | Mn | P | S0L-AL | Ti | YP | TS | EL | R | |
기존재 | <=0.005 | <=0.15 | <=0.015 | 0.02∼0.06 | 0.035∼0.055 | 15∼16 | 28∼31 | 46∼48 | 1.8∼2.0 |
발명강 | <=0.005 | 0.3∼0.05 | 0.02∼0.04 | 0.02∼0.05 | 0.045∼0.065 | 18∼20 | 32∼34 | 44∼45 | 1.8∼1.9 |
발명강과 기존 공급재의 내덴트성 비교 결과 | ||||||||
구분 | R/H | L/H | ||||||
① | ② | ③ | ④ | ⑤ | ⑥ | ⑦ | ⑧ | |
기존재 | 4.65 | 8.85 | 4.50 | 8.05 | 4.55 | 7.00 | 3.80 | 6.55 |
NSC재 | 4.65 | 8.10 | 4.35 | 6.65 | 4.75 | 9.15 | 4.00 | 6.90 |
개선재 | 3.80 | 5.90 | 3.95 | 6.10 | 3.95 | 6.95 | 3.50 | 6.10 |
Claims (1)
- 중량 %로 [C]: 0.005% 이하, [Mn]:0.3∼0.5%, [P]:0.2∼0.4%, [S]:0.015% 이하, [N]:0.003% 이하, [Al] 0.02∼0.05%, [Ti] 0.45∼0.065%의 성분조성을 가지고, 강의 제조시 불가피하게 함유되는 원소를 포함한 알루미늄 킬드강을 1050∼1200℃에서 균질화처리후 열간압연 마무리 온도를 Ar3 변태점 직상인 900∼940℃로 하며 열연권취는 600∼700℃의 온도범위에서 실시한 후 통상의 방법으로 산세처리하고, 이어서 70∼85%의 냉간압하율로 냉간압연을 실시하고, 800∼830℃ 온도범위에서 연속소둔한후 냉각속도 -10∼-30℃/sec 수준으로 냉각후 과시효처리하고, 조질압연시 연신율 0.6∼1.2%를 적용하여 항복강도 18∼22kgf/mm2, 인장장강도 32∼35kgf/mm2및 수직이방성 평균값 1.8이상을 확보하는 것을 특징으로 하는 내덴트성 및 가공성이 우수한 냉연강판 제조방법.
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KR10-2000-0070811A KR100478723B1 (ko) | 2000-11-27 | 2000-11-27 | 내덴트성 및 가공성이 우수한 냉연강판 제조방법 |
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KR10-2000-0070811A KR100478723B1 (ko) | 2000-11-27 | 2000-11-27 | 내덴트성 및 가공성이 우수한 냉연강판 제조방법 |
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KR20020041067A true KR20020041067A (ko) | 2002-06-01 |
KR100478723B1 KR100478723B1 (ko) | 2005-03-24 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR100957971B1 (ko) * | 2007-12-27 | 2010-05-17 | 주식회사 포스코 | 고항복비 고강도 용융아연도금강판 및 그 제조방법 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04120217A (ja) * | 1990-09-11 | 1992-04-21 | Nippon Steel Corp | 焼付硬化性に優れた冷延鋼板の製造方法 |
JP2995526B2 (ja) * | 1993-12-28 | 1999-12-27 | 新日本製鐵株式会社 | 成形加工性に優れ、塗装焼付け硬化性を有し、かつ幅方向の塗装焼付け硬化性の変動の少ない冷延鋼板の製造方法 |
JP3140289B2 (ja) * | 1994-04-08 | 2001-03-05 | 新日本製鐵株式会社 | 成形加工性に優れ、塗装焼付け硬化性を有し、かつ幅方向の塗装焼付け硬化性の変動の少ない自動車用高強度冷延鋼板の製造方法 |
KR100403962B1 (ko) * | 1998-12-29 | 2004-06-04 | 주식회사 포스코 | 초고성형,고강도소부경화형냉연강판및그제조방법 |
KR100433248B1 (ko) * | 1999-12-28 | 2004-05-27 | 주식회사 포스코 | 가공성 및 내벤트성이 우수한 고가공용 고강도 냉연강판및 그 제조방법 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR100957971B1 (ko) * | 2007-12-27 | 2010-05-17 | 주식회사 포스코 | 고항복비 고강도 용융아연도금강판 및 그 제조방법 |
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