BRPI0410575A - chapa de aço de alta resistência laminada a frio e chapa de aço de alta resistência com superfìcie tratada, com limite de resistência à tração de 780 mpa ou mais, tendo excelente capacidade de conformação local e aumento suprimindo na dureza da solda - Google Patents

chapa de aço de alta resistência laminada a frio e chapa de aço de alta resistência com superfìcie tratada, com limite de resistência à tração de 780 mpa ou mais, tendo excelente capacidade de conformação local e aumento suprimindo na dureza da solda

Info

Publication number
BRPI0410575A
BRPI0410575A BRPI0410575-3A BRPI0410575A BRPI0410575A BR PI0410575 A BRPI0410575 A BR PI0410575A BR PI0410575 A BRPI0410575 A BR PI0410575A BR PI0410575 A BRPI0410575 A BR PI0410575A
Authority
BR
Brazil
Prior art keywords
steel sheet
high strength
strength steel
mpa
surface treated
Prior art date
Application number
BRPI0410575-3A
Other languages
English (en)
Inventor
Koichi Goto
Riki Okamoto
Hirokazu Taniguchi
Original Assignee
Nippon Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Publication of BRPI0410575A publication Critical patent/BRPI0410575A/pt
Publication of BRPI0410575B1 publication Critical patent/BRPI0410575B1/pt

Links

Classifications

    • 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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing 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
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12785—Group IIB metal-base component
    • Y10T428/12792—Zn-base component
    • Y10T428/12799—Next to Fe-base component [e.g., galvanized]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12951—Fe-base component
    • Y10T428/12958—Next to Fe-base component
    • Y10T428/12965—Both containing 0.01-1.7% carbon [i.e., steel]

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Tires In General (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Abstract

"CHAPA DE AçO DE ALTA RESISTêNCIA LAMINADA A FRIO E CHAPA DE AçO DE ALTA RESISTêNCIA COM SUPERFìCIE TRATADA, COM LIMITE DE RESISTêNCIA à TRAçãO DE 780 MPA OU MAIS, TENDO EXCELENTE CAPACIDADE DE CONFORMAçãO LOCAL E AUMENTO SUPRIMIDO NA DUREZA DA SOLDA". A presente invenção refere-se a uma chapa de aço laminada a frio de alta resistência e a uma chapa de aço de alta resistência com superfície tratada com 780 MPa ou mais de limite de resistência à tração, as ditas chapas de aço tendo excelente capacidade de conformação local e aumento de dureza da solda suprimido e sendo caracterizadas pelo fato de que as ditas chapas de aço contêm, em peso, C: 0,05 a 0,09%, Si: 0,4 a 1,3%, Mn: 2,5 a 3,2%, P: 0,001 a 0,05%, N: 0,0005 a 0,006% Al: 0, 005 a 0,1%, Ti: 0,001 a 0,045%, e S na faixa estipulada pela expressão (A) a seguir, com o saldo consistindo em Fe e as inevitáveis impurezas; as microestruturas das mencionadas chapas de aço sendo compostas de bainita de 7% ou mais em termos de porcentagem de área e o saldo consistindo em um ou mais dentre ferrita, martensita, martensita temperada e austenita retida; e os ditos componentes nas mencionadas chapas de aço satisfazendo as expressões (C) e (D) a seguir quando Mn eq. é definido pela expressão (B) a seguir; S <243> 0,08 x (Ti(%) - 3,43 x N(%)) + 0,004 ... (A), onde, quando o valor do membro Ti(%) - 3,43 x N(%) da dita expressão (A) é negativo, o valor é considerado como zero, Mn eq. = Mn(%) - 0,29 x Si(%) + 6,24 x C(%) ... (B), 950 <243> (Mn eq. / (C(%) - (Si(%)/75))) x porcentagem de área de bainita (%) ... (C), C(%) + (Si(%)/20) + (Mn(%)/18) <243> 0,30 ... (D).
BRPI0410575A 2003-05-21 2004-01-09 chapa de aço laminada a frio de alta resistência com resistência à tração de 780 mpa ou mais BRPI0410575B1 (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003143638A JP4235030B2 (ja) 2003-05-21 2003-05-21 局部成形性に優れ溶接部の硬さ上昇を抑制した引張強さが７８０ＭＰａ以上の高強度冷延鋼板および高強度表面処理鋼板
PCT/JP2004/000126 WO2004104256A1 (en) 2003-05-21 2004-01-09 A cold-rolled steel sheet having a tensile strength of 780 mpa or more an excellent local formability and a suppressed increase in weld hardness

Publications (2)

Publication Number Publication Date
BRPI0410575A true BRPI0410575A (pt) 2006-06-20
BRPI0410575B1 BRPI0410575B1 (pt) 2016-07-12

Family

ID=33475133

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0410575A BRPI0410575B1 (pt) 2003-05-21 2004-01-09 chapa de aço laminada a frio de alta resistência com resistência à tração de 780 mpa ou mais

Country Status (13)

Country Link
US (1) US7780799B2 (pt)
EP (1) EP1675970B1 (pt)
JP (1) JP4235030B2 (pt)
KR (1) KR100732733B1 (pt)
CN (1) CN100348766C (pt)
AT (1) ATE380888T1 (pt)
BR (1) BRPI0410575B1 (pt)
CA (1) CA2526488C (pt)
DE (1) DE602004010699T2 (pt)
ES (1) ES2294455T3 (pt)
PL (1) PL208233B1 (pt)
RU (1) RU2312163C2 (pt)
WO (1) WO2004104256A1 (pt)

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JP4235030B2 (ja) 2009-03-04
BRPI0410575B1 (pt) 2016-07-12
US20070071997A1 (en) 2007-03-29
CA2526488C (en) 2012-05-15
PL381033A1 (pl) 2007-04-16
WO2004104256A1 (en) 2004-12-02
RU2312163C2 (ru) 2007-12-10
CN100348766C (zh) 2007-11-14
KR20060012016A (ko) 2006-02-06
CN1791697A (zh) 2006-06-21
RU2005140022A (ru) 2006-06-10
ES2294455T3 (es) 2008-04-01
US7780799B2 (en) 2010-08-24
PL208233B1 (pl) 2011-04-29
KR100732733B1 (ko) 2007-06-29
JP2004346362A (ja) 2004-12-09
EP1675970B1 (en) 2007-12-12
DE602004010699D1 (de) 2008-01-24
DE602004010699T2 (de) 2008-12-04
ATE380888T1 (de) 2007-12-15
EP1675970A1 (en) 2006-07-05
CA2526488A1 (en) 2004-12-02

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