JP4268559B2 - 伸びフランジ性に優れた高強度鋼板 - Google Patents
伸びフランジ性に優れた高強度鋼板 Download PDFInfo
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- JP4268559B2 JP4268559B2 JP2004128058A JP2004128058A JP4268559B2 JP 4268559 B2 JP4268559 B2 JP 4268559B2 JP 2004128058 A JP2004128058 A JP 2004128058A JP 2004128058 A JP2004128058 A JP 2004128058A JP 4268559 B2 JP4268559 B2 JP 4268559B2
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- stretch flangeability
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- 229910000831 Steel Inorganic materials 0.000 title claims description 67
- 239000010959 steel Substances 0.000 title claims description 67
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 13
- 229910052684 Cerium Inorganic materials 0.000 claims description 12
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 12
- 229910052746 lanthanum Inorganic materials 0.000 claims description 12
- 239000012535 impurity Substances 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 229910052748 manganese Inorganic materials 0.000 claims description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims description 6
- 229910052717 sulfur Inorganic materials 0.000 claims description 6
- 239000002245 particle Substances 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000002131 composite material Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000008397 galvanized steel Substances 0.000 description 2
- 238000005246 galvanizing Methods 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 229910021193 La 2 O 3 Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- -1 morphology Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Heat Treatment Of Sheet Steel (AREA)
Description
Claims (3)
- C:0.03〜0.3質量%、Si:0.1〜2.0質量%、Mn:1.0〜3.5質量%、P:0.05質量%以下、S:0.01質量%以下、N:0.0005〜0.01質量%、酸可溶Al:0.01質量%以下、酸可溶Ti:0.008質量%未満、CeおよびLaの1種または2種の合計:0.0005〜0.04質量%を含有し、残部が鉄および不可避的不純物からなる鋼であり、その鋼中には、平均の介在物組成で、Ce酸化物およびLa酸化物の1種または2種の合計が10〜90質量%、SiO2が5〜60質量%、Al2O3が50質量%以下の範囲の介在物を含むことを特徴とする伸びフランジ性に優れた高強度鋼板。
- C:0.03〜0.3質量%、Si:0.1〜2.0質量%、Mn:1.0〜3.5質量%、P:0.05質量%以下、S:0.01質量%以下、N:0.0005〜0.01質量%、酸可溶Al:0.01質量%以下、酸可溶Ti:0.008質量%未満(ただし、0.005質量%以上を除く)、CeおよびLaの1種または2種の合計:0.0005〜0.04質量%を含有し、残部が鉄および不可避的不純物からなる鋼であり、その鋼中には、介在物の個数割合で、50%以上が球状と紡錘状の介在物からなることを特徴とする伸びフランジ性に優れた高強度鋼板。
- C:0.03〜0.3質量%、Si:0.1〜2.0質量%、Mn:1.0〜3.5質量%、P:0.05質量%以下、S:0.01質量%以下、N:0.0005〜0.01質量%、酸可溶Al:0.01質量%以下、酸可溶Ti:0.008質量%未満(ただし、0.005質量%以上を除く)、CeおよびLaの1種または2種の合計:0.0005〜0.04質量%を含有し、残部が鉄および不可避的不純物からなる鋼であり、その鋼中には、0.5μm以上10μm以下の介在物が1000個/cm2以上、100000個/cm2以下存在することを特徴とする伸びフランジ性に優れた高強度鋼板。
Priority Applications (1)
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JP2004128058A JP4268559B2 (ja) | 2004-04-23 | 2004-04-23 | 伸びフランジ性に優れた高強度鋼板 |
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JP2004128058A JP4268559B2 (ja) | 2004-04-23 | 2004-04-23 | 伸びフランジ性に優れた高強度鋼板 |
Publications (2)
Publication Number | Publication Date |
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JP2005307301A JP2005307301A (ja) | 2005-11-04 |
JP4268559B2 true JP4268559B2 (ja) | 2009-05-27 |
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JP2004128058A Expired - Lifetime JP4268559B2 (ja) | 2004-04-23 | 2004-04-23 | 伸びフランジ性に優れた高強度鋼板 |
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Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4901346B2 (ja) * | 2005-11-07 | 2012-03-21 | 新日本製鐵株式会社 | 伸びフランジ性と疲労特性に優れた高強度鋼板 |
JP4719067B2 (ja) * | 2006-04-21 | 2011-07-06 | 新日本製鐵株式会社 | 伸びフランジ性に優れた高強度鋼板およびその製造方法 |
CA2657587C (en) * | 2006-07-14 | 2013-11-26 | Nippon Steel Corporation | High strength steel plate superior in stretch flange formability and fatigue characteristics |
JP4431185B2 (ja) * | 2008-06-13 | 2010-03-10 | 新日本製鐵株式会社 | 伸びフランジ性と疲労特性に優れた高強度鋼板およびその溶鋼の溶製方法 |
JP5058892B2 (ja) * | 2008-06-16 | 2012-10-24 | 新日本製鐵株式会社 | 伸びフランジ性に優れたdp鋼板およびその製造方法 |
CN102892910B (zh) * | 2010-05-10 | 2016-11-16 | 新日铁住金株式会社 | 高强度钢板及其制造方法 |
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- 2004-04-23 JP JP2004128058A patent/JP4268559B2/ja not_active Expired - Lifetime
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