EP2684975B1 - Produit plat en acier laminé à froid et son procédé de fabrication - Google Patents

Produit plat en acier laminé à froid et son procédé de fabrication Download PDF

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Publication number
EP2684975B1
EP2684975B1 EP12175756.1A EP12175756A EP2684975B1 EP 2684975 B1 EP2684975 B1 EP 2684975B1 EP 12175756 A EP12175756 A EP 12175756A EP 2684975 B1 EP2684975 B1 EP 2684975B1
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EP
European Patent Office
Prior art keywords
flat steel
steel product
temperature
cold
cooling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP12175756.1A
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German (de)
English (en)
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EP2684975A1 (fr
Inventor
Roland Sebald
Dorothea Mattissen
Sigrun Voss
Stefan Follner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp Steel Europe AG
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ThyssenKrupp Steel Europe AG
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Filing date
Publication date
Priority to PL12175756T priority Critical patent/PL2684975T3/pl
Application filed by ThyssenKrupp Steel Europe AG filed Critical ThyssenKrupp Steel Europe AG
Priority to ES12175756.1T priority patent/ES2614465T3/es
Priority to EP12175756.1A priority patent/EP2684975B1/fr
Priority to CN201380036484.9A priority patent/CN104471096B/zh
Priority to JP2015520969A priority patent/JP6236078B2/ja
Priority to BR112014021543-0A priority patent/BR112014021543B1/pt
Priority to KR1020147021943A priority patent/KR102128563B1/ko
Priority to PCT/EP2013/064551 priority patent/WO2014009404A1/fr
Priority to US14/377,398 priority patent/US10344344B2/en
Publication of EP2684975A1 publication Critical patent/EP2684975A1/fr
Application granted granted Critical
Publication of EP2684975B1 publication Critical patent/EP2684975B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0273—Final recrystallisation annealing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment
    • C21D8/0284—Application of a separating or insulating coating
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/001—Austenite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/002—Bainite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/005—Ferrite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/009—Pearlite

Claims (9)

  1. Produit plat en acier laminé à froid qui
    - est fabriqué à partir d'un acier qui contient les éléments suivants (en % en poids)
    C : 0,12 - 0,19 %,
    Mn : 1,5 - 2,5 %,
    Si : > 0,60 - 1,0 %,
    Al : ≤ 0,1 %,
    Cr : 0,2 - 0,6 %,
    Ti : 0,05 - 0,15 %
    le reste étant du fer et des impuretés inévitables imputables au procédé de fabrication,
    et qui présente
    - une structure sans perlite et sans bainite avec une proportion de martensite de 4 - 20 % en volume, une proportion d'austénite résiduelle de 2 - 15 % en volume, le reste étant du ferrite,
    - un allongement à la rupture A80 d'au moins 15 %,
    - une résistance à la traction Rm d'au moins 880 MPa,
    - une limite d'élasticité ReL d'au moins 550 MPa
    et
    - un rapport d'élargissement du trou λM supérieur à 6 %.
  2. Produit plat en acier laminé à froid selon la revendication 1, caractérisé en ce que son contenu de Si se monte à au moins 0,65 % en poids.
  3. Produit plat en acier laminé à froid selon une des revendications précédentes, caractérisé en ce que son contenu de Ti se monte à au moins 0,07 % en poids.
  4. Procédé de fabrication d'un produit plat en acier laminé à froid constitué selon une des revendications de 1 à 3 comportant les étapes de travail suivantes:
    - coulée d'une masse fondue d'acier qui contient les éléments suivants (en % en poids)
    C: 0,12 - 0,19 %,
    Mn: 1,5 - 2,5 %,
    Si: > 0, 60 - 1,0 %,
    Al: ≤ 0,1 %,
    Cr: 0,2 - 0,6 %,
    Ti: 0,05 - 0,15 %
    le reste étant du fer et des impuretés inévitables imputables au procédé de fabrication,
    pour former un produit semi-fini consistant en une brame ou une brame mince,
    - réchauffement du produit semi-fini à une température d'austénisation de 1100 - 1300 °C,
    - laminage à chaud du produit semi-fini réchauffé pour former un feuillard à chaud, auquel cas la température finale de laminage à chaud est de 850 - 960 °C,
    - refroidissement du feuillard à chaud à une température de bobinage de 500 - 650 °C,
    - bobinage du feuillard à chaud refroidi à la température de bobinage,
    - décapage, au choix, du feuillard à chaud,
    - laminage à froid du feuillard à chaud pour former un produit plat en acier laminé à froid, auquel cas le degré de laminage à froid atteint lors du laminage à froid est d'au moins 30 %,
    - recuit continu du produit plat en acier laminé à froid, auquel cas lors du recuit continu le produit plat en acier
    - est réchauffé à une température de recuit de 750 - 900 °C et est maintenu à cette température de recuit pendant 80 - 300 secondes et
    - est refroidi en deux étapes, à la suite du processus de recuit, auquel cas le produit plat en acier est refroidi
    - dans la première étape du processus de refroidissement à une température intermédiaire de 450 - 550 °C avec une vitesse de refroidissement de 8 - 100 K/s et
    - dans la deuxième étape du processus de refroidissement à partir de la température intermédiaire à une température de 350 - 450 °C avec une vitesse de refroidissement de 2 - 100 K/s,
    - vieillissement du produit plat en acier pendant une durée de vieillissement de 210 - 710 secondes, auquel cas à la fin du processus de vieillissement la température est de 100 - 400 °C,
    - refroidissement du produit plat en acier à une température ambiante,
    - laminage complémentaire du produit plat en acier avec un degré de laminage de 0,2 - 2 %,
    - revêtement, au choix, du produit plat en acier avec une couche de protection métallique.
  5. Procédé selon la revendication 4, caractérisé en ce que le refroidissement dans la première étape du processus de refroidissement à deux étapes a lieu par de l'air en circulation.
  6. Procédé selon une des revendications de 4 à 5, caractérisé en ce que le produit plat en acier est refroidi au moins dans la deuxième étape du processus de refroidissement à deux étapes par un contact avec des rouleaux refroidis.
  7. Procédé selon une des revendications de 4 à 6, caractérisé en ce que le produit plat en acier est refroidi dans la deuxième étape du processus de refroidissement à deux étapes par un flux d'air en circulation.
  8. Procédé selon une des revendications de 4 à 7, caractérisé en ce que le produit plat en acier lors de traitement de vieillissement traverse un espace protégé par rapport à l'environnement, dans lequel la température du produit plat en acier passe d'une température d'entrée étant au maximum de 450 °C à une température étant à la fin de 100 - 400 °C.
  9. Procédé selon une des revendications de 4 à 8, caractérisé en ce que le revêtement avec une couche de protection métallique a lieu de manière électrolytique.
EP12175756.1A 2012-07-10 2012-07-10 Produit plat en acier laminé à froid et son procédé de fabrication Not-in-force EP2684975B1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
ES12175756.1T ES2614465T3 (es) 2012-07-10 2012-07-10 Producto plano de acero laminado en frío y procedimiento para su fabricación
EP12175756.1A EP2684975B1 (fr) 2012-07-10 2012-07-10 Produit plat en acier laminé à froid et son procédé de fabrication
PL12175756T PL2684975T3 (pl) 2012-07-10 2012-07-10 Produkt stalowy płaski, walcowany na zimno i sposób jego wytwarzania
JP2015520969A JP6236078B2 (ja) 2012-07-10 2013-07-10 冷間圧延鋼板製品およびその製造方法
CN201380036484.9A CN104471096B (zh) 2012-07-10 2013-07-10 冷轧扁钢产品及其制造方法
BR112014021543-0A BR112014021543B1 (pt) 2012-07-10 2013-07-10 Produto de aço plano laminado a frio e processo para sua produção
KR1020147021943A KR102128563B1 (ko) 2012-07-10 2013-07-10 냉간-압연 평탄형 강 제품 및 그 제조 방법
PCT/EP2013/064551 WO2014009404A1 (fr) 2012-07-10 2013-07-10 Produit d'acier plat laminé à froid et son procédé de fabrication
US14/377,398 US10344344B2 (en) 2012-07-10 2013-07-10 Cold-rolled flat steel product and method for its production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12175756.1A EP2684975B1 (fr) 2012-07-10 2012-07-10 Produit plat en acier laminé à froid et son procédé de fabrication

Publications (2)

Publication Number Publication Date
EP2684975A1 EP2684975A1 (fr) 2014-01-15
EP2684975B1 true EP2684975B1 (fr) 2016-11-09

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EP12175756.1A Not-in-force EP2684975B1 (fr) 2012-07-10 2012-07-10 Produit plat en acier laminé à froid et son procédé de fabrication

Country Status (9)

Country Link
US (1) US10344344B2 (fr)
EP (1) EP2684975B1 (fr)
JP (1) JP6236078B2 (fr)
KR (1) KR102128563B1 (fr)
CN (1) CN104471096B (fr)
BR (1) BR112014021543B1 (fr)
ES (1) ES2614465T3 (fr)
PL (1) PL2684975T3 (fr)
WO (1) WO2014009404A1 (fr)

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EP2028282B1 (fr) 2007-08-15 2012-06-13 ThyssenKrupp Steel Europe AG Acier en phase double, produit plat à partir d'un tel acier en phase double et son procédé de fabrication
EP2031081B1 (fr) * 2007-08-15 2011-07-13 ThyssenKrupp Steel Europe AG Acier en phase double, produit plat à partir d'un tel acier en phase double et son procédé de fabrication
JP5369663B2 (ja) * 2008-01-31 2013-12-18 Ｊｆｅスチール株式会社 加工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
JP5438302B2 (ja) * 2008-10-30 2014-03-12 株式会社神戸製鋼所 加工性に優れた高降伏比高強度の溶融亜鉛めっき鋼板または合金化溶融亜鉛めっき鋼板とその製造方法
JP5192991B2 (ja) * 2008-11-12 2013-05-08 株式会社神戸製鋼所 高強度合金化溶融亜鉛めっき鋼板の製造方法および高強度合金化溶融亜鉛めっき鋼板
JP5262664B2 (ja) * 2008-12-12 2013-08-14 新日鐵住金株式会社 Ｃｒ含有鋼板およびその製造方法
JP5503346B2 (ja) * 2010-03-11 2014-05-28 株式会社神戸製鋼所 耐水素脆性に優れた超高強度薄鋼板
JP5141811B2 (ja) * 2010-11-12 2013-02-13 Ｊｆｅスチール株式会社 均一伸びとめっき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
JP5273324B1 (ja) * 2011-07-29 2013-08-28 新日鐵住金株式会社 曲げ性に優れた高強度亜鉛めっき鋼板およびその製造方法

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CN104471096B (zh) 2017-08-15
PL2684975T3 (pl) 2017-08-31
US20150000797A1 (en) 2015-01-01
BR112014021543B1 (pt) 2020-03-17
WO2014009404A1 (fr) 2014-01-16
EP2684975A1 (fr) 2014-01-15
KR20150031407A (ko) 2015-03-24
JP6236078B2 (ja) 2017-11-22
KR102128563B1 (ko) 2020-07-08
ES2614465T3 (es) 2017-05-31
CN104471096A (zh) 2015-03-25
US10344344B2 (en) 2019-07-09
JP2015528058A (ja) 2015-09-24

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