JP2017524817A - 成形性および延性が改善された高強度鋼板を製造する方法ならびに得られる鋼板 - Google Patents
成形性および延性が改善された高強度鋼板を製造する方法ならびに得られる鋼板 Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 125
- 239000010959 steel Substances 0.000 title claims abstract description 125
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 5
- 238000010791 quenching Methods 0.000 claims abstract description 39
- 230000000171 quenching effect Effects 0.000 claims abstract description 39
- 229910001566 austenite Inorganic materials 0.000 claims abstract description 32
- 238000000137 annealing Methods 0.000 claims abstract description 27
- 238000001816 cooling Methods 0.000 claims abstract description 20
- 239000000203 mixture Substances 0.000 claims abstract description 20
- 229910000734 martensite Inorganic materials 0.000 claims abstract description 19
- 230000000717 retained effect Effects 0.000 claims abstract description 17
- 229910001563 bainite Inorganic materials 0.000 claims abstract description 13
- 239000000126 substance Substances 0.000 claims abstract description 13
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 230000009466 transformation Effects 0.000 claims abstract description 10
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 238000002791 soaking Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 17
- 238000004804 winding Methods 0.000 claims description 10
- 238000005098 hot rolling Methods 0.000 claims description 7
- 239000010960 cold rolled steel Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
- 238000005097 cold rolling Methods 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 abstract description 3
- 239000011572 manganese Substances 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000005275 alloying Methods 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000007598 dipping method Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- 238000005246 galvanizing Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 238000002441 X-ray diffraction Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000007572 expansion measurement Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
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- C21D8/0226—Hot rolling
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- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
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- 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
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- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
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Abstract
Description
0.25%<C≦0.4%
2.3%≦Mn≦3.5%
2.3%≦Si≦3.0%
Al≦0.040%
を含有し、残部はFeおよび不可避不純物であり、
− 熱間圧延鋼板を得るために、前記鋼でできた鋼板を熱間圧延する工程、
− 前記熱間圧延鋼板を400℃から700℃の間において300秒から10時間の間の時間でバッチ焼鈍する工程、
− 冷間圧延鋼板を得るために、前記熱間圧延およびバッチ焼鈍された鋼板を冷間圧延する工程、
− 前記冷間圧延鋼板を、鋼の変態点Ac3+20℃を超え、1100℃未満の焼鈍温度ATにおいて均熱化することにより焼鈍する工程、
− 少なくとも65%、好ましくは75%を超えるマルテンサイト、および少なくとも15%の残留オーステナイトを含有し、フェライトおよびベイナイトの合計が10%未満である組織を得るために、鋼板をMs−65℃からMs−115℃の間の焼入れ温度QTまで冷却することによって焼入れする工程であって、MsがAndrews式による鋼のMs変態点である、工程
− 鋼板を360℃から500℃の間の過時効温度PTまで加熱し、鋼板を前記温度において10秒から600秒の間の時間Ptの間維持する工程、および
− 鋼板を室温まで冷却する工程
を含む、方法に関する。
0.25%<C≦0.35%
2.4%≦Mn≦2.7%
2.3%≦Si≦2.5%
Al≦0.040%
を含有し、焼鈍温度ATは860℃を超え950℃未満であり、焼入れ温度QTは200℃から260℃の間であり、過時効温度は370℃から430℃の間である。
0.25%<C≦0.4%
2.3%≦Mn≦3.5%
2.3%≦Si≦3%
Al≦0.040%
を含有し、残部がFeおよび不可避不純物である鋼でできた高張力鋼板にも関し、鋼は65%を超える、好ましくは75%を超えるマルテンサイト、少なくとも15%、好ましくは少なくとも20%の残留オーステナイト、ならびに10未満%のフェライトおよびベイナイトの合計を含有する組織を有する。
0.25%<C≦0.35%
2.4%≦Mn≦2.7%
2.3%≦Si≦2.5%
Al≦0.040%
を含有する。
− 十分な強度を得るため、および残留オーステナイトの安定性を改善するための、0.25%<C≦0.4%、好ましくは0.25%<C≦0.35%であるC。炭素含量が高すぎる場合、溶接性が低下する。
Ms=539−423×C−30.4×Mn−12.1×Cr−7.5×Mo−7.5×Si
および
fα’=1−exp{−0.011×(Ms−QT)}
であり、fα’は温度QTにおける焼入れの間に得られるマルテンサイトの割合である。焼入れ温度QTまで焼入れした後の、過時効および室温までの冷却後の残留オーステナイトの割合を決定するために、焼入れ後、鋼板はQTを超える温度において、フェライトおよびベイナイトの形成を可能な限り少なくしながらマルテンサイトとオーステナイトとの間で炭素の十分な分配を生じさせるのに十分な時間をかけて過時効処理されると仮定される。過時効後、鋼板は室温まで冷却されることも仮定される。
Claims (20)
- 成形性および延性が改善された高強度鋼板を製造する方法であって、該方法によれば鋼の化学組成が重量パーセントで
0.25%<C≦0.4%
2.3%≦Mn≦3.5%
2.3%≦Si≦3%
Al≦0.040%
を含有し、残部がFeおよび不可避不純物であり、以下の順次工程:
− 熱間圧延鋼板を得るために、鋼でできた鋼板を熱間圧延する工程、
− 熱間圧延鋼板を400℃から700℃の間において300秒から10時間の間の時間でバッチ焼鈍する工程、
− 冷間圧延鋼板を得るために、熱間圧延およびバッチ焼鈍された鋼板を冷間圧延する工程、
− 冷間圧延鋼板を、鋼の変態点を超え1100℃未満の焼鈍温度ATであるAc3+20℃において均熱化することにより焼鈍する工程、
− 少なくとも65%のマルテンサイトおよび少なくとも15%の残留オーステナイトを含有し、フェライトおよびベイナイトの合計が10%未満である最終的な組織を得るために、鋼板をMs−65℃からMs−115℃の間の鋼の焼入れ温度QTまで冷却することによって焼入れする工程であって、MsがAndrews式による鋼のMs変態点である、工程
− 鋼板を360℃から500℃の間の過時効温度PTまで加熱し、鋼板を過時効温度PTにおいて10秒から600秒の間の時間Ptの間維持する工程、および
− 鋼板を室温まで冷却する工程
を含む、方法。 - 鋼板が過時効温度PTにおいて300秒から600秒の間の時間Ptの間維持されることを特徴とする、請求項1に記載の方法。
- 熱間圧延する工程とバッチ焼鈍する工程との間に、熱間圧延鋼板を巻取りする工程をさらに含むことを特徴とする、請求項1または2のいずれか一項に記載の方法。
- 熱間圧延鋼板が、350℃から580℃の間に含まれる巻取り温度で巻取りされることを特徴とする、請求項3に記載の方法。
- バッチ焼鈍が、525℃から700℃の間、好ましくは550℃から700℃の間、例えば550℃から650℃の間の温度で行われることを特徴とする、請求項1から4のいずれか一項に記載の方法。
- バッチ焼鈍が4時間から10時間の間の時間で行われることを特徴とする、請求項1から5のいずれか一項に記載の方法。
- 少なくとも75%のマルテンサイトを含有する最終的な組織を得るために、鋼板が焼入れ温度QTまで冷却されることを特徴とする、請求項1から6のいずれか一項に記載の方法。
- 少なくとも20%の残留オーステナイトを含有する最終的な組織を得るために、鋼板が焼入れ温度QTまで冷却されることを特徴とする、請求項1から7のいずれか一項に記載の方法。
- 鋼の化学組成が2.3%≦Si≦2.5%であるような組成であることを特徴とする、請求項1から8のいずれか一項に記載の方法。
- 鋼の化学組成が
0.25%<C≦0.35%
2.4%≦Mn≦2.7%
であるような組成であることを特徴とする、請求項1から9のいずれか一項に記載の方法。 - 焼鈍温度ATが860℃を超え950℃未満であり、焼入れ温度QTが200℃から260℃の間であり、過時効温度PTが370℃から430℃の間であることを特徴とする、請求項1から10のいずれか一項に記載の方法。
- 鋼板がさらに被覆されることを特徴とする、請求項1から11のいずれか一項に記載の方法。
- 鋼板が過時効温度PTにおいて10秒から200秒の間の時間Ptの間維持され、室温まで冷却される前に450℃から490℃の間に含まれる温度においてさらに溶融めっきされることを特徴とする、請求項12に記載の方法。
- 化学組成が重量パーセントで
0.25%<C≦0.4%
2.3%≦Mn≦3.5%
2.3%≦Si≦3%
Al≦0.040%
を含有し、残部がFeおよび不可避不純物である鋼でできた高張力鋼板であって、鋼が65%を超えるマルテンサイト、15%を超える残留オーステナイト、ならびに10%未満のフェライトおよびベイナイトの合計を含有する組織を有する、高張力鋼板。 - 組織が少なくとも75%のマルテンサイトを含有することを特徴とする、請求項14に記載の高張力鋼板。
- 組織が少なくとも20%の残留オーステナイトを含有することを特徴とする、請求項14または15に記載の高張力鋼板。
- 鋼の化学組成が2.3%≦Si≦2.5%であるような組成であることを特徴とする、請求項14から16のいずれか一項に記載の高張力鋼板。
- 鋼の化学組成が
0.25%<C≦0.35%
2.4%≦Mn≦2.7%
であるような組成であることを特徴とする、請求項14から17のいずれか一項に記載の高張力鋼板。 - 降伏強度YSが1050MPa以上であり、引張強度が1300MPa以上であり、一様伸びUEが10%以上であり、穴広げ率HERが25%以上であることを特徴とする、請求項14から18のいずれか一項に記載の高張力鋼板。
- 鋼板の少なくとも1つの面が被覆されていることを特徴とする、請求項14から19のいずれか一項に記載の高張力鋼板。
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019536906A (ja) * | 2016-11-07 | 2019-12-19 | ポスコPosco | 降伏比に優れた超高強度鋼板及びその製造方法 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9924224B2 (en) | 2015-04-03 | 2018-03-20 | The Nielsen Company (Us), Llc | Methods and apparatus to determine a state of a media presentation device |
DE102015004399A1 (de) | 2015-04-10 | 2016-10-13 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Wasch- und Reinigungsmittel mit polymerem Wirkstoff |
CN106244923B (zh) | 2016-08-30 | 2018-07-06 | 宝山钢铁股份有限公司 | 一种磷化性能和成形性能优良的冷轧高强度钢板及其制造方法 |
WO2019122964A1 (en) * | 2017-12-19 | 2019-06-27 | Arcelormittal | Steel sheet having excellent toughness, ductility and strength, and manufacturing method thereof |
WO2019122965A1 (en) * | 2017-12-19 | 2019-06-27 | Arcelormittal | Cold rolled and coated steel sheet and a method of manufacturing thereof |
FI3887556T3 (fi) * | 2018-11-30 | 2023-03-25 | Arcelormittal | Kylmävalssattu karkaistu teräslevy jossa on suuri aukon laajentumissuhde ja sen valmistusmenetelmä |
WO2020128574A1 (en) * | 2018-12-18 | 2020-06-25 | Arcelormittal | Cold rolled and heat-treated steel sheet and method of manufacturing the same |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010126770A (ja) * | 2008-11-28 | 2010-06-10 | Jfe Steel Corp | 成形性に優れた高強度溶融亜鉛めっき鋼板およびその製造方法 |
JP2012031462A (ja) * | 2010-07-29 | 2012-02-16 | Jfe Steel Corp | 成形性および耐衝撃性に優れた高強度溶融亜鉛めっき鋼板およびその製造方法 |
JP2012229466A (ja) * | 2011-04-26 | 2012-11-22 | Jfe Steel Corp | 成形性及び形状凍結性に優れた高強度溶融亜鉛めっき鋼板、並びにその製造方法 |
JP2014508854A (ja) * | 2010-12-27 | 2014-04-10 | ポスコ | 延性に優れた成形部材用鋼板、成形部材及びその製造方法 |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06128631A (ja) | 1992-10-20 | 1994-05-10 | Nippon Steel Corp | 低温靱性の優れた高マンガン超高張力鋼の製造方法 |
JP3857939B2 (ja) | 2001-08-20 | 2006-12-13 | 株式会社神戸製鋼所 | 局部延性に優れた高強度高延性鋼および鋼板並びにその鋼板の製造方法 |
AU2003270334A1 (en) * | 2002-09-04 | 2004-03-29 | Colorado School Of Mines | Method for producing steel with retained austenite |
AR042494A1 (es) | 2002-12-20 | 2005-06-22 | Sumitomo Chemical Co | Acero inoxidable martensitico de alta resistencia con excelentes propiedades de resistencia a la corrosion por dioxido de carbono y resistencia a la corrosion por fisuras por tensiones de sulfuro |
CN101376945B (zh) | 2007-08-28 | 2011-06-15 | 宝山钢铁股份有限公司 | 2000MPa级超高强度高韧性钢板及其制造方法 |
JP5365216B2 (ja) | 2008-01-31 | 2013-12-11 | Jfeスチール株式会社 | 高強度鋼板とその製造方法 |
EP2123787A1 (fr) | 2008-05-06 | 2009-11-25 | Industeel Creusot | Acier à hautes caractéristiques pour pièces massives |
KR101027250B1 (ko) | 2008-05-20 | 2011-04-06 | 주식회사 포스코 | 고연성 및 내지연파괴 특성이 우수한 고강도 냉연강판,용융아연 도금강판 및 그 제조방법 |
JP5418047B2 (ja) * | 2008-09-10 | 2014-02-19 | Jfeスチール株式会社 | 高強度鋼板およびその製造方法 |
JP5365112B2 (ja) * | 2008-09-10 | 2013-12-11 | Jfeスチール株式会社 | 高強度鋼板およびその製造方法 |
CN101638749B (zh) | 2009-08-12 | 2011-01-26 | 钢铁研究总院 | 一种低成本高强塑积汽车用钢及其制备方法 |
JP5883211B2 (ja) * | 2010-01-29 | 2016-03-09 | 株式会社神戸製鋼所 | 加工性に優れた高強度冷延鋼板およびその製造方法 |
JP5287770B2 (ja) | 2010-03-09 | 2013-09-11 | Jfeスチール株式会社 | 高強度鋼板およびその製造方法 |
JP5327106B2 (ja) * | 2010-03-09 | 2013-10-30 | Jfeスチール株式会社 | プレス部材およびその製造方法 |
KR101243002B1 (ko) | 2010-12-22 | 2013-03-12 | 주식회사 포스코 | 연신율이 우수한 고강도 강판 및 그 제조방법 |
KR20120071583A (ko) | 2010-12-23 | 2012-07-03 | 주식회사 포스코 | 저온인성이 우수한 고강도 고망간강 |
JP5440672B2 (ja) | 2011-09-16 | 2014-03-12 | Jfeスチール株式会社 | 加工性に優れた高強度鋼板およびその製造方法 |
US9617614B2 (en) * | 2011-10-24 | 2017-04-11 | Jfe Steel Corporation | Method for manufacturing high strength steel sheet having excellent formability |
RU2474623C1 (ru) | 2011-10-31 | 2013-02-10 | Валентин Николаевич Никитин | Способ производства высокопрочной листовой стали мартенситного класса и деформационно-термический комплекс для его осуществления |
JP2013237923A (ja) | 2012-04-20 | 2013-11-28 | Jfe Steel Corp | 高強度鋼板およびその製造方法 |
RU2491357C1 (ru) * | 2012-05-10 | 2013-08-27 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Национальный исследовательский технологический университет "МИСиС" | Способ производства листовой стали |
JP5857905B2 (ja) | 2012-07-25 | 2016-02-10 | 新日鐵住金株式会社 | 鋼材およびその製造方法 |
WO2014020640A1 (ja) * | 2012-07-31 | 2014-02-06 | Jfeスチール株式会社 | 成形性及び形状凍結性に優れた高強度溶融亜鉛めっき鋼板、並びにその製造方法 |
CN102912219A (zh) | 2012-10-23 | 2013-02-06 | 鞍钢股份有限公司 | 一种高强塑积trip钢板及其制备方法 |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010126770A (ja) * | 2008-11-28 | 2010-06-10 | Jfe Steel Corp | 成形性に優れた高強度溶融亜鉛めっき鋼板およびその製造方法 |
JP2012031462A (ja) * | 2010-07-29 | 2012-02-16 | Jfe Steel Corp | 成形性および耐衝撃性に優れた高強度溶融亜鉛めっき鋼板およびその製造方法 |
JP2014508854A (ja) * | 2010-12-27 | 2014-04-10 | ポスコ | 延性に優れた成形部材用鋼板、成形部材及びその製造方法 |
JP2012229466A (ja) * | 2011-04-26 | 2012-11-22 | Jfe Steel Corp | 成形性及び形状凍結性に優れた高強度溶融亜鉛めっき鋼板、並びにその製造方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019536906A (ja) * | 2016-11-07 | 2019-12-19 | ポスコPosco | 降伏比に優れた超高強度鋼板及びその製造方法 |
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