KR20140103340A - 고강도 열연 강판 및 그 제조 방법 - Google Patents
고강도 열연 강판 및 그 제조 방법 Download PDFInfo
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Abstract
당해 과제를 해결하기 위하여, 본 발명은, 특정 조성으로 이루어지고, 페라이트상의 면적률이 95 % 이상, 그 페라이트상의 평균 결정 입경이 8 ㎛ 이하이며, 그 페라이트상의 결정립 내의 탄화물의 평균 입자경이 10 ㎚ 미만인 조직을 갖고, 인장 강도가 980 ㎫ 이상인 것을 특징으로 한다.
Description
Claims (14)
- 질량% 로,
C : 0.06 % 이상 0.1 % 이하,
Si : 0.09 % 이하,
Mn : 0.7 % 이상 1.3 % 이하,
P : 0.03 % 이하,
S : 0.01 % 이하,
Al : 0.1 % 이하,
N : 0.01 % 이하,
Ti : 0.14 % 이상 0.20 % 이하
V : 0.07 % 이상 0.14 % 이하
를 함유하고, 잔부가 Fe 및 불가피적 불순물인 조성으로 이루어지고,
페라이트상의 면적률이 95 % 이상, 그 페라이트상의 평균 결정 입경이 8 ㎛ 이하, 그 페라이트상의 결정립 내의 탄화물의 평균 입자경이 10 ㎚ 미만인 조직을 갖고, 인장 강도가 980 ㎫ 이상인 고강도 열연 강판. - 제 1 항에 있어서,
상기 조성에 더하여 추가로, 질량% 로 Nb : 0.01 % 이상 0.05 % 이하를 함유하는 고강도 열연 강판. - 제 1 항 또는 제 2 항에 있어서,
상기 조성에 더하여 추가로, Mo, W, Zr, Hf 중 어느 1 종 이상을 함유하고, 이들의 함유량을, Mo : 0.05 % 이하, W : 0.05 % 이하, Zr : 0.05 % 이하, Hf : 0.05 % 이하로 제한하여 이루어지는 고강도 열연 강판. - 제 1 항 내지 제 3 항 중 어느 한 항에 있어서,
상기 조성에 더하여 추가로, 질량% 로, O (산소), Se, Te, Po, As, Bi, Ge, Pb, Ga, In, Tl, Zn, Cd, Hg, Ag, Au, Pd, Pt, Co, Rh, Ir, Ru, Os, Tc, Re, Ta, Be, Sr, REM, B, Ni, Cr, Sb, Cu, Sn, Mg 및 Ca 중 1 종 이상을 합계로 0.2 % 이하 함유하는 고강도 열연 강판. - 제 1 항 내지 제 4 항 중 어느 한 항에 있어서,
상기 강판 표면에 도금층을 추가로 갖는 고강도 열연 강판. - 제 5 항에 있어서,
상기 도금층이 아연 도금층인 고강도 열연 강판. - 제 5 항에 있어서,
상기 도금층이 합금화 아연 도금층인 고강도 열연 강판. - 강 소재를 가열하고, 조압연과 마무리 압연으로 이루어지는 열간 압연을 실시하고, 마무리 압연 종료 후, 냉각시키고, 권취하여, 열연 강판으로 함에 있어서,
상기 강 소재를, 질량% 로,
C : 0.06 % 이상 0.1 % 이하,
Si : 0.09 % 이하,
Mn : 0.7 % 이상 1.3 % 이하,
P : 0.03 % 이하,
S : 0.01 % 이하,
Al : 0.1 % 이하,
N : 0.01 % 이하,
Ti : 0.14 % 이상 0.20 % 이하
V : 0.07 % 이상 0.14 % 이하
를 함유하고, 잔부가 Fe 및 불가피적 불순물로 이루어지는 조성으로 하고,
상기 강 소재의 가열 온도를 1100 ℃ 이상 1350 ℃ 이하로 하고, 상기 마무리 압연의 마무리 압연 온도를 850 ℃ 이상으로 하며, 상기 냉각을 마무리 압연 종료 후부터 3 초 이내에 개시하고, 상기 냉각의 평균 냉각 속도를 20 ℃/s 이상으로 하고, 상기 권취의 권취 온도를 550 ℃ 이상 700 ℃ 이하로 하는 고강도 열연 강판의 제조 방법. - 제 8 항에 있어서,
상기 조성에 더하여 추가로, 질량% 로 Nb : 0.01 % 이상 0.05 % 이하를 함유하는 고강도 열연 강판의 제조 방법. - 제 8 항 또는 제 9 항에 있어서,
상기 조성에 더하여 추가로, Mo, W, Zr, Hf 중 어느 1 종 이상을 함유하고, 이들의 함유량을, Mo : 0.05 % 이하, W : 0.05 % 이하, Zr : 0.05 % 이하, Hf : 0.05 % 이하로 제한하여 이루어지는 고강도 열연 강판의 제조 방법. - 제 8 항 내지 제 10 항 중 어느 한 항에 있어서,
상기 조성에 더하여 추가로, 질량% 로, O (산소), Se, Te, Po, As, Bi, Ge, Pb, Ga, In, Tl, Zn, Cd, Hg, Ag, Au, Pd, Pt, Co, Rh, Ir, Ru, Os, Tc, Re, Ta, Be, Sr, REM, B, Ni, Cr, Sb, Cu, Sn, Mg 및 Ca 중 1 종 이상을 합계로 0.2 % 이하 함유하는 고강도 열연 강판의 제조 방법. - 제 8 항 내지 제 11 항 중 어느 한 항에 있어서,
상기 열연 강판의 표면에 도금층을 형성하는 고강도 열연 강판의 제조 방법. - 제 12 항에 있어서,
상기 도금층이 아연 도금층인 고강도 열연 강판의 제조 방법. - 제 12 항에 있어서,
상기 도금층이 합금화 아연 도금층인 고강도 열연 강판의 제조 방법.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012013592 | 2012-01-26 | ||
| JPJP-P-2012-013592 | 2012-01-26 | ||
| PCT/JP2013/000257 WO2013111556A1 (ja) | 2012-01-26 | 2013-01-21 | 高強度熱延鋼板及びその製造方法 |
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| KR20140103340A true KR20140103340A (ko) | 2014-08-26 |
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| KR1020147019785A Ceased KR20140103340A (ko) | 2012-01-26 | 2013-01-21 | 고강도 열연 강판 및 그 제조 방법 |
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| US (1) | US20150030880A1 (ko) |
| EP (1) | EP2808413B1 (ko) |
| JP (1) | JP5565534B2 (ko) |
| KR (1) | KR20140103340A (ko) |
| CN (1) | CN104053806B (ko) |
| WO (1) | WO2013111556A1 (ko) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5578288B2 (ja) * | 2012-01-31 | 2014-08-27 | Jfeスチール株式会社 | 発電機リム用熱延鋼板およびその製造方法 |
| JP5915412B2 (ja) * | 2012-06-29 | 2016-05-11 | Jfeスチール株式会社 | 曲げ性に優れた高強度熱延鋼板およびその製造方法 |
| JP5637225B2 (ja) * | 2013-01-31 | 2014-12-10 | Jfeスチール株式会社 | バーリング加工性に優れた高強度熱延鋼板およびその製造方法 |
| JP5821864B2 (ja) * | 2013-01-31 | 2015-11-24 | Jfeスチール株式会社 | バーリング加工性に優れた高強度熱延鋼板およびその製造方法 |
| CN103469115B (zh) * | 2013-08-07 | 2016-01-06 | 安徽蓝博旺机械集团合诚机械有限公司 | 叉车转向节用铸钢材料及其制备方法 |
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| JPH0676619B2 (ja) * | 1988-08-23 | 1994-09-28 | 住友金属工業株式会社 | 高強度鋼板の製造方法及びその加工品の熱処理方法 |
| JP4304421B2 (ja) * | 2002-10-23 | 2009-07-29 | 住友金属工業株式会社 | 熱延鋼板 |
| JP4232545B2 (ja) * | 2003-06-11 | 2009-03-04 | 住友金属工業株式会社 | 高強度熱延鋼板とその製造方法 |
| JP4581665B2 (ja) * | 2004-12-08 | 2010-11-17 | 住友金属工業株式会社 | 高強度熱延鋼板とその製造方法 |
| JP4528275B2 (ja) * | 2006-03-20 | 2010-08-18 | 新日本製鐵株式会社 | 伸びフランジ性に優れた高強度熱延鋼板 |
| JP2007262429A (ja) | 2006-03-27 | 2007-10-11 | Jfe Steel Kk | 曲げ加工性に優れた耐摩耗鋼板 |
| JP5092433B2 (ja) | 2007-02-02 | 2012-12-05 | 住友金属工業株式会社 | 熱延鋼板及びその製造方法 |
| JP4803108B2 (ja) * | 2007-05-21 | 2011-10-26 | 住友金属工業株式会社 | 高強度熱延鋼板及びその製造方法 |
| JP5326403B2 (ja) * | 2007-07-31 | 2013-10-30 | Jfeスチール株式会社 | 高強度鋼板 |
| JP2010053434A (ja) * | 2008-08-29 | 2010-03-11 | Nakayama Steel Works Ltd | 延性に優れた高強度熱延薄鋼板およびその製造方法 |
| JP5573003B2 (ja) * | 2009-05-29 | 2014-08-20 | Jfeスチール株式会社 | 自動車部材用高張力溶接鋼管 |
| JP5041083B2 (ja) * | 2010-03-31 | 2012-10-03 | Jfeスチール株式会社 | 加工性に優れた高張力溶融亜鉛めっき鋼板およびその製造方法 |
| JP5041084B2 (ja) * | 2010-03-31 | 2012-10-03 | Jfeスチール株式会社 | 加工性に優れた高張力熱延鋼板およびその製造方法 |
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| EP2808413A1 (en) | 2014-12-03 |
| CN104053806A (zh) | 2014-09-17 |
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