JP5820889B2 - 極低温靭性に優れた高強度鋼材及びその製造方法 - Google Patents
極低温靭性に優れた高強度鋼材及びその製造方法 Download PDFInfo
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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Description
Claims (2)
- 重量%で、炭素(C):0.01〜0.06%、マンガン(Mn):2.0〜8.0%、ニッケル(Ni):0.01〜6.0%、モリブデン(Mo):0.02〜0.6%、シリコン(Si):0.03〜0.5%、アルミニウム(Al):0.003〜0.05%、窒素(N):0.0015〜0.01%、リン(P):0.02%以下、硫黄(S):0.01%以下、
チタニウム(Ti):0.003〜0.05%、クロム(Cr):0.1〜5.0%、銅(Cu):0.1〜3.0%からなる群より選択される少なくとも1種以上、ならびに
残部Fe及びその他の不純物
からなり、
前記Mn、Ni、Cr及びCuは、8≦1.5×(Mn+Cr+Cu)+Ni≦12を満たし、
主相であるラス構造のマルテンサイト、10vol%以下のベイナイト及び3〜15vol%の残留オーステナイト組織を有し、
降伏強度は500MPa以上で、−196℃以下の極低温における衝撃エネルギー値が70J以上である、
極低温靭性に優れた高強度鋼材。 - 重量%で、炭素(C):0.01〜0.06%、マンガン(Mn):2.0〜8.0%、ニッケル(Ni):0.01〜6.0%、モリブデン(Mo):0.02〜0.6%、シリコン(Si):0.03〜0.5%、アルミニウム(Al):0.003〜0.05%、窒素(N):0.0015〜0.01%、リン(P):0.02%以下、硫黄(S):0.01%以下、
チタニウム(Ti):0.003〜0.05%、クロム(Cr):0.1〜5.0%、銅(Cu):0.1〜3.0%からなる群より選択される少なくとも1種以上、ならびに
残部Fe及びその他の不純物
からなり、
前記Mn、Ni、Cr及びCuは、8≦1.5×(Mn+Cr+Cu)+Ni≦12を満たす、
鋼スラブを1000〜1250℃の温度範囲で加熱する加熱段階と、
前記加熱されたスラブを700〜950℃の温度において40%以上の圧下率で仕上げ圧延する圧延段階と、
前記圧延された鋼材を2℃/s以上の冷却速度で400℃以下の温度まで冷却する冷却段階と、
前記冷却段階後、550〜650℃の温度区間において前記鋼材を0.5〜4時間焼戻しする焼戻し段階
とを含み、
前記焼戻し後の鋼材は、主相であるラス構造のマルテンサイト、10vol%以下のベイナイト及び3〜15vol%の残留オーステナイト組織を有し、
前記焼戻し後の鋼材の降伏強度は500MPa以上で、−196℃以下の極低温における衝撃エネルギー値が70J以上である、
極低温靭性に優れた高強度鋼材の製造方法。
Applications Claiming Priority (3)
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KR10-2010-0115702 | 2010-11-19 | ||
KR1020100115702A KR101271974B1 (ko) | 2010-11-19 | 2010-11-19 | 극저온 인성이 우수한 고강도 강재 및 그 제조방법 |
PCT/KR2011/008884 WO2012067474A2 (ko) | 2010-11-19 | 2011-11-21 | 극저온 인성이 우수한 고강도 강재 및 그 제조방법 |
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JP2014501848A JP2014501848A (ja) | 2014-01-23 |
JP5820889B2 true JP5820889B2 (ja) | 2015-11-24 |
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US (1) | US9394579B2 (ja) |
EP (1) | EP2641987B1 (ja) |
JP (1) | JP5820889B2 (ja) |
KR (1) | KR101271974B1 (ja) |
CN (1) | CN103221562B (ja) |
ES (1) | ES2581335T3 (ja) |
WO (1) | WO2012067474A2 (ja) |
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JP2007080646A (ja) | 2005-09-14 | 2007-03-29 | National Institute Of Advanced Industrial & Technology | 直列型燃料電池 |
KR100851189B1 (ko) * | 2006-11-02 | 2008-08-08 | 주식회사 포스코 | 저온인성이 우수한 초고강도 라인파이프용 강판 및 그제조방법 |
KR101018131B1 (ko) | 2007-11-22 | 2011-02-25 | 주식회사 포스코 | 저온인성이 우수한 고강도 저항복비 건설용 강재 및 그제조방법 |
KR101094310B1 (ko) * | 2008-09-18 | 2011-12-19 | 한국기계연구원 | 저온인성이 우수한 용접성 초고강도강 및 그 제조방법 |
WO2010052927A1 (ja) * | 2008-11-06 | 2010-05-14 | 新日本製鐵株式会社 | 超高強度ラインパイプ用鋼板および鋼管の製造方法 |
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EP2641987A2 (en) | 2013-09-25 |
US9394579B2 (en) | 2016-07-19 |
EP2641987A4 (en) | 2014-11-12 |
WO2012067474A2 (ko) | 2012-05-24 |
ES2581335T3 (es) | 2016-09-05 |
CN103221562B (zh) | 2016-07-06 |
KR101271974B1 (ko) | 2013-06-07 |
KR20120054359A (ko) | 2012-05-30 |
CN103221562A (zh) | 2013-07-24 |
WO2012067474A3 (ko) | 2012-09-13 |
JP2014501848A (ja) | 2014-01-23 |
EP2641987B1 (en) | 2016-04-06 |
US20130174941A1 (en) | 2013-07-11 |
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