JP4171454B2 - 伸びおよび穴拡げ性に優れた高強度鋼板または溶融亜鉛めっき高強度鋼板の製造設備 - Google Patents
伸びおよび穴拡げ性に優れた高強度鋼板または溶融亜鉛めっき高強度鋼板の製造設備 Download PDFInfo
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims 1
- 239000011701 zinc Substances 0.000 claims 1
- 229910052725 zinc Inorganic materials 0.000 claims 1
- 238000005275 alloying Methods 0.000 description 9
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- 229910052799 carbon Inorganic materials 0.000 description 1
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- OXNIZHLAWKMVMX-UHFFFAOYSA-N picric acid Chemical compound OC1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O OXNIZHLAWKMVMX-UHFFFAOYSA-N 0.000 description 1
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- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 description 1
- 235000010262 sodium metabisulphite Nutrition 0.000 description 1
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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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Description
このように、穴拡げ性を要求された高強度鋼板が、しかも溶融亜鉛めっき処理されたものが増加しつつある一方、溶融亜鉛めっき処理なしの穴拡げ性の高い高強度鋼板の要求もあり、加えて従来からの自動車の外板パネルに使用されるような比較的軟質な鋼板や、オイルパンなどに使用される極めて深絞り性が大きい鋼板も定常的に生産する必要がある。 これら多種多様な鋼板を安定的に効率よく生産するためには、従来の単一目的型の、鋼板を連続的に焼鈍処理する連続焼鈍設備や、焼鈍から溶融亜鉛めっき処理を一連の設備列で連続的に処理することが可能な連続焼鈍溶融亜鉛めっき設備では、これらの複数の設備を組み合わせて通板しなければならず、設備の追加建設や製造工期の延長、製造コストの増大といった問題が発生する。
(1)連続焼鈍設備や連続溶融亜鉛めっき処理設備またはそれらの兼用設備の内に、もしくはそれらに連続的に併設して、再結晶後、または再結晶後かつ溶融亜鉛めっき処理後の鋼板を、マルテンサイト変態点以下の温度域まで冷却可能な焼入れ設備と、当該鋼板を焼戻し保温する焼戻設備と、当該鋼板を100 ℃以下まで冷却する再冷却設備を配列し、焼入れ設備と焼戻設備の間の焼戻昇温量ΔTが、焼戻後の引張強さTSと穴拡げ率λから求められる下記の(A)式の範囲に入り、焼戻前温度T(℃)が、焼戻後の引張強さTSと穴拡げ率λから求められる下記の(B)式の範囲に入ることを特徴とする、伸びおよび穴拡げ性に優れた高強度鋼板または溶融亜鉛めっき高強度鋼板の製造設備。
0.028 (λ-28 )TS-11.5 λ-40 ≦ΔT ≦0.028 (λ-28 )TS-7.5λ-90 ・・・(A)
[{-2(λ-40 ) 2 }/10 5 ]×(TS-580) 2 -8λ+700≦T≦[ {-15 (λ-45 )}/10 5 ]×(TS-580) 2 -λ+555・・・(B)
λ:穴拡げ率(%)、TS:焼戻後の引張強さ(MPa)、T:焼戻前温度T(℃)、ΔT :焼戻昇温量(℃)。
熱延または冷延鋼板で、特に伸びおよび穴拡げ性に優れた高強度鋼板を製造する場合には、例えば、質量%で、C:0.01〜0.3 %、Si:0.005 〜2%、Mn:0.1 〜3.3 %、P:0.001 〜0.06%、S:0.001 〜0.01%、Al:0.01〜1.8 %、N:0.0005〜0.01%を含有し、残部Feおよび不可避的不純物からなる熱延または冷延鋼板を、焼鈍加熱設備1にてAc1 〜Ac3 + 100℃の温度で30秒〜30分加熱し、次いで焼鈍冷却設備2にて1℃/s以上の冷却速度で450 〜600 ℃の温度に冷却する。次いで必要に応じ保温設備3にて150 〜500 ℃の温度で10秒〜30分保持した後、図1の「めっき無パス」の場合には、ルートaを通ることにより溶融亜鉛めっき処理設備4をバイパスし、次いでルートbの如く合金化設備5を通り抜ける。尚、合金化設備も含めてルートcの如くバイパスしても構わない。次いで焼入れ設備6にて1℃/s以上の冷却速度でマルテンサイト変態点以下の温度域まで冷却した後、焼戻設備7にて200 ℃以上500 ℃以下の温度に昇温し1s〜5分保持し、再冷却設備8にて5℃/s以上の冷速で100 ℃以下まで冷却する。尚、前記成分範囲および温度条件等は好ましい範囲であり、特にこれに限定しないものである。
熱延または冷延の溶融亜鉛めっき高強度鋼板で、特に伸びおよび穴拡げ性に優れた溶融亜鉛めっき高強度鋼板をする場合には、例えば、質量%で、C:0.01〜0.3 %、Si:0.005 〜2%、Mn:0.1 〜3.3 %、P:0.001 〜0.06%、S:0.001 〜0.01%、Al:0.01〜1.8 %、N:0.0005〜0.01%を含有し、残部Feおよび不可避的不純物からなるめっき原板を、焼鈍加熱設備1にてAc1 〜Ac3 + 100℃の温度で30秒〜30分加熱し、次いで焼鈍冷却設備2にて1℃/s以上の冷却速度で450 〜600 ℃の温度に冷却する。次いで必要に応じ保温設備3にて150 〜500 ℃の温度で10秒〜30分保持した後、図1の「めっき有パス」にて溶融亜鉛めっき処理設備4を通板して所定の目付け量の溶融亜鉛めっきを施す。さらに必要に応じて合金化設備5にて合金化処理を施す。次いで焼入れ設備6にて1℃/s以上の冷却速度でマルテンサイト変態点以下の温度域まで冷却した後、焼戻設備7にて200 ℃以上500 ℃以下の温度に昇温し、1s〜5分保持し、再冷却設備8にて5℃/s以上の冷速で100 ℃以下まで冷却する。尚、前記成分範囲および温度条件等は好ましい範囲であり、特にこれに限定しない。
熱延または冷延の溶融亜鉛めっき高強度鋼板で、特に伸びおよび穴拡げ性に優れた溶融亜鉛めっき高強度鋼板をする場合には、例えば、質量%で、C:0.01〜0.3 %、Si:0.005 〜2%、Mn:0.1 〜3.3 %、P:0.001 〜0.06%、S:0.001 〜0.01%、Al:0.01〜1.8 %、N:0.0005〜0.01%を含有し、残部Feおよび不可避的不純物からなるめっき原板を、焼鈍加熱設備1にてAc1 〜Ac3 + 100℃の温度で30秒〜30分加熱し、次いで焼鈍冷却設備2を、実施例2の焼入れ設備6と同様に焼入れ設備として使用して1℃/s以上の冷却速度でマルテンサイト変態点以下の温度域まで冷却した後、保温設備3を実施例2の焼戻設備7と同様に焼戻設備として使用して200 ℃以上500 ℃以下の温度に昇温し1s〜5分保持する。さらに図1の「めっき有パス」にて溶融亜鉛めっき処理設備を通板して所定の目付け量の溶融亜鉛めっきを施し、必要に応じて合金化設備5にて合金化処理を施す。次いで焼入れ設備6または再冷却設備8にて5℃/s以上の冷速で100 ℃以下まで冷却する。焼入れ設備6で5℃/s以上の冷速で100 ℃以下まで冷却する場合は、焼戻設備7は空通板で加熱は行わない。再冷却設備8で5℃/s以上の冷速で100 ℃以下まで冷却する場合は、焼入れ設備6と焼戻設備7は空通板で冷却や加熱は行わないか、積極的な冷却または加熱はせずに保温程度で留める等、溶融亜鉛めっき層の造りこみに応じて適時使い分ける。尚、前記成分範囲および温度条件等は好ましい範囲であり、特にこれに限定しない。
そこで、これらの関係を整理し、焼戻前温度、焼戻昇温量、焼戻後の引張強さ、穴拡げ率が(A)式および(B)式を満たす時に必要な焼戻マルテンサイトを確保でき、優れた成形性および穴拡げ性を確保できることを知見した。
0.028 (λ-28 )TS-11.5 λ-40 ≦ΔT ≦0.028 (λ-28 )TS-7.5λ-90 ・・・(A)
[{-2(λ-40 ) 2 }/10 5 ]×(TS-580) 2 -8λ+700≦T≦[ {-15 (λ-45 )}/10 5 ]×(TS-580) 2 -λ+555・・・(B)
λ:穴拡げ率(%) TS:焼戻後の引張強さ(MPa) T:焼戻前温度T(℃) ΔT :焼戻昇温量(℃)
上記の(A)式および(B)式の範囲に入れば、あるいは範囲の中で必要に応じて制御すれば、ユーザーの要求に応じた引張強さと穴拡げ率のバランスを持つ高強度鋼板または溶融亜鉛めっき高強度鋼板を得ることができる。
尚、上記の穴拡げ率λは、150mm 角の試験片を、打ち抜き穴Φ10mm、クリアランス12%、頂角60°の円錐ポンチを打ち抜き穴のバリが外側になる方向に押し広げ成形速度0.5mm/sec.で成形する。
また、本件の焼戻設備の仕様については、設備のコンパクト化や短時間で確実な焼戻効果を得るために、加熱方式は誘導加熱であることが好ましいが、ガスバーナー、ラジアントチューブ炉、電気ヒーター炉による焼戻でも、誘導加熱と同程度のコンパクト化、短時間での焼戻効果が得られるのならば差し支えない。
本件の焼入れ/焼戻設備を設置する連続焼鈍設備や溶融亜鉛めっき処理設備またはそれらの兼用設備には、めっき密着性を向上させるプレメッキ設備があっても差し支えない。また、表面の潤滑性、耐食性、化成処理性を付加するために、連続焼鈍設備や溶融亜鉛めっき処理設備またはそれらの兼用設備の出側に各種の後処理設備が設置されても差し支えない。
[1] 〜[3] は比較例としての従来例で、[1] は焼入れのまま焼戻なしの場合、[2][3]従来の連続溶融亜鉛めっき処理設備を通板し常温まで冷却(焼入れ)された後、別ラインで焼戻される場合、[4] 〜[7] は本発明による設備により処理される場合をしめす。
2 焼鈍冷却設備
3 保温設備
4 溶融亜鉛めっき処理設備
5 合金化設備
6 焼入れ設備
7 焼戻設備
8 再冷却設備
Claims (3)
- 連続焼鈍設備や連続溶融亜鉛めっき処理設備またはそれらの兼用設備の内に、もしくはそれらに連続的に併設して、再結晶後、または再結晶後かつ溶融亜鉛めっき処理後の鋼板を、マルテンサイト変態点以下の温度域まで冷却可能な焼入れ設備と、当該鋼板を焼戻し保温する焼戻設備と、当該鋼板を100 ℃以下まで冷却する再冷却設備を配列し、焼入れ設備と焼戻設備の間の焼戻昇温量ΔTが、焼戻後の引張強さTSと穴拡げ率λから求められる下記の(A)式の範囲に入り、焼戻前温度T(℃)が、焼戻後の引張強さTSと穴拡げ率λから求められる下記の(B)式の範囲に入ることを特徴とする伸びおよび穴拡げ性に優れた高強度鋼板または溶融亜鉛めっき高強度鋼板の製造設備。
0.028 (λ-28 )TS-11.5 λ-40 ≦ΔT ≦0.028 (λ-28 )TS-7.5λ-90 ・・・(A)
[{-2(λ-40 ) 2 }/10 5 ]×(TS-580) 2 -8λ+700≦T≦[ {-15 (λ-45 )}/10 5 ]×(TS-580) 2 -λ+555・・・(B)
λ:穴拡げ率(%)、TS:焼戻後の引張強さ(MPa)、T:焼戻前温度T(℃)、ΔT :焼戻昇温量(℃) - 焼入れ設備の冷却方式が気水冷却、ミスト冷却、水スプレー冷却、ディップ水冷の何れかであることを特徴とする、請求項1に記載の伸びおよび穴拡げ性に優れた高強度鋼板または溶融亜鉛めっき高強度鋼板の製造設備。
- 焼戻設備の加熱方式が誘導加熱であることを特徴とする、請求項1または2に記載の伸びおよび穴拡げ性に優れた高強度鋼板または溶融亜鉛めっき高強度鋼板の製造設備。
Priority Applications (12)
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JP2004335598A JP4171454B2 (ja) | 2004-11-19 | 2004-11-19 | 伸びおよび穴拡げ性に優れた高強度鋼板または溶融亜鉛めっき高強度鋼板の製造設備 |
ES05806771.1T ES2541307T3 (es) | 2004-11-19 | 2005-11-09 | Aparato para la producción de chapa de acero de alta resistencia o chapa de acero de alta resistencia revestida de zinc por inmersión en caliente, excelente en alargamiento y capacidad de expansión del orificio |
KR1020097017112A KR20090102854A (ko) | 2004-11-19 | 2005-11-09 | 신장 및 구멍 확장성이 우수한 고강도 강판 또는 용융 아연 도금 고강도 강판의 제조 방법 |
CNB2005800395062A CN100564550C (zh) | 2004-11-19 | 2005-11-09 | 延伸率与扩孔性优良的高强度钢板或热浸镀锌高强度钢板的制造设备 |
US11/719,718 US9096918B2 (en) | 2004-11-19 | 2005-11-09 | Facility for production of high strength steel sheet or hot dip zinc coated high strength steel sheet excellent in elongation and hole expandability |
KR20077011322A KR20070068461A (ko) | 2004-11-19 | 2005-11-09 | 신장 및 구멍 확장성이 우수한 고강도 강판 또는 용융 아연도금 고강도 강판의 제조 설비 |
BRPI0518342-1B1A BRPI0518342B1 (pt) | 2004-11-19 | 2005-11-09 | Equipamento para produção de chapas de aço de alta resistência ou chapas de aço de alta resistência revestidas de zinco por imersão a quente com excelente alongamento e excelente capacidade de expansão de furos |
PL05806771T PL1829981T3 (pl) | 2004-11-19 | 2005-11-09 | Urządzenie do produkcji blachy stalowej o wysokiej wytrzymałości albo blachy stalowej o wysokiej wytrzymałości, powlekanej ogniowo cynkiem, o doskonałych właściwościach wydłużenia oraz rozszerzalności otworu |
CA2587953A CA2587953C (en) | 2004-11-19 | 2005-11-09 | Facility for production of high strength steel sheet or hot dip zinc coated high strength steel sheet excellent in elongation and hole expandabiility |
EP05806771.1A EP1829981B1 (en) | 2004-11-19 | 2005-11-09 | Apparatus for producing high strength steel sheet or hot dip zinc plated high strength steel sheet excellent in elongation and bore expanding characteristics |
MX2007005568A MX2007005568A (es) | 2004-11-19 | 2005-11-09 | Aparato para producir lamina de acero de alta resistencia o lamina de acero de alta resistencia con formacion de placa de zinc en profundo con calor, excelente en elongacion y caracteristicas de expansion de la perforacion. |
PCT/JP2005/020977 WO2006054564A1 (ja) | 2004-11-19 | 2005-11-09 | 伸びおよび穴拡げ性に優れた高強度鋼板または溶融亜鉛めっき高強度鋼板の製造設備 |
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JP2004335598A JP4171454B2 (ja) | 2004-11-19 | 2004-11-19 | 伸びおよび穴拡げ性に優れた高強度鋼板または溶融亜鉛めっき高強度鋼板の製造設備 |
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US (1) | US9096918B2 (ja) |
EP (1) | EP1829981B1 (ja) |
JP (1) | JP4171454B2 (ja) |
KR (2) | KR20070068461A (ja) |
CN (1) | CN100564550C (ja) |
BR (1) | BRPI0518342B1 (ja) |
CA (1) | CA2587953C (ja) |
ES (1) | ES2541307T3 (ja) |
MX (1) | MX2007005568A (ja) |
PL (1) | PL1829981T3 (ja) |
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CN102031474A (zh) * | 2010-12-07 | 2011-04-27 | 重庆万达薄板有限公司 | 高强度热浸镀锌钢带生产方法 |
JP5197859B1 (ja) * | 2012-02-23 | 2013-05-15 | 株式会社ワイエイシイデンコー | 熱間プレス用の鋼板の熱処理方法 |
WO2015015239A1 (en) * | 2013-08-02 | 2015-02-05 | ArcelorMittal Investigación y Desarrollo, S.L. | Cold rolled, coated and post tempered steel sheet and method of manufacturing thereof |
DE102014108335B3 (de) * | 2014-06-13 | 2015-10-01 | Thyssenkrupp Ag | Verfahren zur Herstellung eines aluminierten Verpackungsstahls und Verwendung eines aluminierten Stahlblechs als Verpackungsstahl |
RU2749413C2 (ru) | 2016-05-10 | 2021-06-09 | Юнайтид Стейтс Стил Корпорэйшн | Изделия из высокопрочной стали и способы их изготовления |
US11560606B2 (en) | 2016-05-10 | 2023-01-24 | United States Steel Corporation | Methods of producing continuously cast hot rolled high strength steel sheet products |
US11993823B2 (en) | 2016-05-10 | 2024-05-28 | United States Steel Corporation | High strength annealed steel products and annealing processes for making the same |
MX2021013567A (es) | 2019-05-07 | 2022-04-01 | United States Steel Corp | Metodos para fabricar productos de lamina de acero de alta resistencia colados y laminados en caliente en forma continua. |
CA3149331A1 (en) | 2019-08-07 | 2021-02-11 | United States Steel Corporation | High ductility zinc-coated steel sheet products |
KR20220050935A (ko) | 2019-08-19 | 2022-04-25 | 유나이테드 스테이츠 스틸 코포레이션 | 고강도 강 제품 및 이의 제조를 위한 어닐링 공정 |
US12091723B2 (en) | 2020-06-30 | 2024-09-17 | Jfe Steel Corporation | Galvanized steel sheet, member, and method for producing them |
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JPS5794528A (en) | 1980-12-04 | 1982-06-12 | Nippon Kokan Kk <Nkk> | Continous annealing facility |
US4759807A (en) * | 1986-12-29 | 1988-07-26 | Rasmet Ky | Method for producing non-aging hot-dip galvanized steel strip |
JPH01229877A (ja) | 1988-03-04 | 1989-09-13 | Lion Corp | 液体柔軟剤組成物 |
JPH0293051A (ja) | 1988-09-28 | 1990-04-03 | Nippon Steel Corp | 熱漬型連続亜鉛鍍金法による耐時効性亜鉛鍍金鋼板の製造方法 |
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US5284680A (en) * | 1992-04-27 | 1994-02-08 | Inland Steel Company | Method for producing a galvanized ultra-high strength steel strip |
JPH06111299A (ja) | 1992-09-29 | 1994-04-22 | Matsushita Electric Ind Co Ltd | 磁気記録媒体の製造方法 |
JP4728494B2 (ja) | 2001-03-13 | 2011-07-20 | 新日本製鐵株式会社 | 連続焼鈍および溶融メッキ兼用設備 |
JP3979023B2 (ja) | 2001-03-29 | 2007-09-19 | Jfeスチール株式会社 | 高強度冷延鋼板の製造方法 |
DE10238972B4 (de) | 2002-08-20 | 2004-07-15 | C.D. Wälzholz Produktionsgesellschaft mbH | Verfahren und Vorrichtung zur Durchlaufvergütung von Bandstahl sowie entsprechend hergestellter Bandstahl |
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US20050084702A1 (en) * | 2003-08-25 | 2005-04-21 | Olashuk Kenneth R. | Continuous in-line processing to produce hot-dip zinc-spelter coated flat-rolled mild-steel strip |
JP4510488B2 (ja) * | 2004-03-11 | 2010-07-21 | 新日本製鐵株式会社 | 成形性および穴拡げ性に優れた溶融亜鉛めっき複合高強度鋼板およびその製造方法 |
-
2004
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- 2005-11-09 PL PL05806771T patent/PL1829981T3/pl unknown
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MX2007005568A (es) | 2007-07-05 |
US9096918B2 (en) | 2015-08-04 |
KR20070068461A (ko) | 2007-06-29 |
EP1829981A4 (en) | 2013-05-22 |
BRPI0518342B1 (pt) | 2014-04-08 |
CN100564550C (zh) | 2009-12-02 |
BRPI0518342A2 (pt) | 2008-11-18 |
CN101061241A (zh) | 2007-10-24 |
WO2006054564A1 (ja) | 2006-05-26 |
ES2541307T3 (es) | 2015-07-17 |
EP1829981B1 (en) | 2015-06-03 |
US20090205755A1 (en) | 2009-08-20 |
PL1829981T3 (pl) | 2015-10-30 |
CA2587953A1 (en) | 2006-05-26 |
JP2006144075A (ja) | 2006-06-08 |
CA2587953C (en) | 2010-09-14 |
KR20090102854A (ko) | 2009-09-30 |
EP1829981A1 (en) | 2007-09-05 |
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