EP3476969A4 - Precipitation-hardening hot rolled steel sheet having excellent material uniformity and hole expandability, and manufacturing method therefor - Google Patents

Precipitation-hardening hot rolled steel sheet having excellent material uniformity and hole expandability, and manufacturing method therefor Download PDF

Info

Publication number
EP3476969A4
EP3476969A4 EP17815756.6A EP17815756A EP3476969A4 EP 3476969 A4 EP3476969 A4 EP 3476969A4 EP 17815756 A EP17815756 A EP 17815756A EP 3476969 A4 EP3476969 A4 EP 3476969A4
Authority
EP
European Patent Office
Prior art keywords
precipitation
manufacturing
steel sheet
rolled steel
hot rolled
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.)
Withdrawn
Application number
EP17815756.6A
Other languages
German (de)
French (fr)
Other versions
EP3476969A1 (en
Inventor
Hyun-taek NA
Hwan-Goo Seong
Seok-Jong SEO
Sung-Il Kim
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.)
Posco Holdings Inc
Original Assignee
Posco Co Ltd
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 Posco Co Ltd filed Critical Posco Co Ltd
Publication of EP3476969A1 publication Critical patent/EP3476969A1/en
Publication of EP3476969A4 publication Critical patent/EP3476969A4/en
Withdrawn legal-status Critical Current

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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/02—Hardening by precipitation
    • 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
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • 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
    • C21D8/021—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular fabrication or treatment of ingot or slab
    • C21D8/0215—Rapid solidification; Thin strip casting
    • 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
    • C21D8/0247—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
    • 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
    • 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
    • C22C38/02—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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C21D2211/004—Dispersions; Precipitations
    • 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
EP17815756.6A 2016-06-23 2017-06-23 Precipitation-hardening hot rolled steel sheet having excellent material uniformity and hole expandability, and manufacturing method therefor Withdrawn EP3476969A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020160078573A KR101767839B1 (en) 2016-06-23 2016-06-23 Precipitation-hardening hot-rolled steel sheet having excellent uniformity and hole expansion and method for manufacturing the same
PCT/KR2017/006668 WO2017222343A1 (en) 2016-06-23 2017-06-23 Precipitation-hardening hot rolled steel sheet having excellent material uniformity and hole expandability, and manufacturing method therefor

Publications (2)

Publication Number Publication Date
EP3476969A1 EP3476969A1 (en) 2019-05-01
EP3476969A4 true EP3476969A4 (en) 2019-06-12

Family

ID=60142108

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17815756.6A Withdrawn EP3476969A4 (en) 2016-06-23 2017-06-23 Precipitation-hardening hot rolled steel sheet having excellent material uniformity and hole expandability, and manufacturing method therefor

Country Status (5)

Country Link
US (1) US20200325563A1 (en)
EP (1) EP3476969A4 (en)
KR (1) KR101767839B1 (en)
CN (1) CN109415791A (en)
WO (1) WO2017222343A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3347210B2 (en) * 1994-02-09 2002-11-20 日新製鋼株式会社 Manufacturing method of high strength steel sheet for precision punching
CN101538680A (en) * 2009-05-06 2009-09-23 湖南华菱涟源钢铁有限公司 Method for producing high-strength steel with yield strength of 600MPa level
EP2130938A1 (en) * 2007-03-27 2009-12-09 Nippon Steel Corporation High-strength hot rolled steel sheet being free from peeling and excelling in surface and burring properties and process for manufacturing the same
EP2743364A1 (en) * 2011-08-09 2014-06-18 Nippon Steel & Sumitomo Metal Corporation Hot-rolled steel sheet having high yield ratio and excellent low-temperature impact energy absorption and haz softening resistance and method for producing same

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0826433B2 (en) 1992-12-28 1996-03-13 株式会社神戸製鋼所 High strength hot rolled steel sheet with excellent stretch flangeability
JP3716638B2 (en) * 1998-09-10 2005-11-16 Ｊｆｅスチール株式会社 Method for producing high-tensile hot-rolled steel strip having ferrite + bainite structure
JP3775341B2 (en) 2002-04-30 2006-05-17 Ｊｆｅスチール株式会社 High-tensile hot-rolled steel sheet with excellent workability, manufacturing method and processing method thereof
KR100711481B1 (en) 2005-12-26 2007-04-24 주식회사 포스코 A method for manufacturing hot rolled steel sheet for automobile having excellent property of precipitation hardening
KR101245699B1 (en) 2010-11-10 2013-03-25 주식회사 포스코 METHOD FOR MANUFACTURING TENSILE STRENGTH 590MPa CLASS HOT ROLLED TRIP STEEL WITH EXCELLENT VARIATION OF MECHANICAL PROPERTY
KR101245701B1 (en) 2010-11-15 2013-04-01 주식회사 포스코 METHOD FOR MANUFACTURING TENSILE STRENGTH 590MPa CLASS HOT ROLLED DP STEEL WITH EXCELLENT WORKABILITY AND VARIATION OF MECHANICAL PROPERTY
KR101504404B1 (en) * 2012-12-21 2015-03-19 주식회사 포스코 Hot rolled with excellent hole expansion and variation of mechanical properties and method for manufacturing the same
KR101510272B1 (en) * 2012-12-27 2015-04-08 주식회사 포스코 Method for manufacturing hot rolled steel plate and hot rolled steel sheet
KR20150025910A (en) * 2013-08-30 2015-03-11 현대제철 주식회사 High strength hot-rolled steel sheet and method of manufacturing the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3347210B2 (en) * 1994-02-09 2002-11-20 日新製鋼株式会社 Manufacturing method of high strength steel sheet for precision punching
EP2130938A1 (en) * 2007-03-27 2009-12-09 Nippon Steel Corporation High-strength hot rolled steel sheet being free from peeling and excelling in surface and burring properties and process for manufacturing the same
CN101538680A (en) * 2009-05-06 2009-09-23 湖南华菱涟源钢铁有限公司 Method for producing high-strength steel with yield strength of 600MPa level
EP2743364A1 (en) * 2011-08-09 2014-06-18 Nippon Steel & Sumitomo Metal Corporation Hot-rolled steel sheet having high yield ratio and excellent low-temperature impact energy absorption and haz softening resistance and method for producing same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2017222343A1 *

Also Published As

Publication number Publication date
US20200325563A1 (en) 2020-10-15
EP3476969A1 (en) 2019-05-01
WO2017222343A1 (en) 2017-12-28
KR101767839B1 (en) 2017-08-14
CN109415791A (en) 2019-03-01

Similar Documents

Publication Publication Date Title
EP3486346A4 (en) Steel sheet and production method therefor
EP3650569A4 (en) Hot-rolled steel sheet and method for manufacturing same
EP3296415A4 (en) High strength hot rolled steel sheet and manufacturing method for same
EP3489382A4 (en) Steel sheet and method for producing same
PL3152336T3 (en) Cold rolled and hot dip coated steel sheet, production method and use
EP3495528A4 (en) Steel sheet and plated steel sheet
EP3128026A4 (en) High-strength cold rolled steel sheet exhibiting excellent material-quality uniformity, and production method therefor
EP3495529A4 (en) Steel sheet and plated steel sheet
EP3495527A4 (en) Steel sheet and plated steel sheet
EP3312299A4 (en) Steel sheet and manufacturing method
EP3473741A4 (en) Thin steel sheet and process for producing same
EP3467134A4 (en) High-strength thin steel sheet and method for manufacturing same
EP3553195A4 (en) High mn steel sheet and method for producing same
EP3521477A4 (en) Steel sheet for carburization, and production method for steel sheet for carburization
EP3584340A4 (en) Steel sheet and manufacturing method therefor
EP3712293A4 (en) Coating for hot stamping-formed steel and production method therefor
EP3276030A4 (en) Hot-rolled steel sheet and manufacturing method of same, and manufacturing method of cold-rolled steel sheet
EP3476962A4 (en) Thin steel sheet, and production method therefor
EP3530770A4 (en) Hot-rolled steel sheet for manufacturing electrical steel, and method for manufacturing same
EP3653745A4 (en) High-strength steel sheet and manufacturing method thereof
EP3584346A4 (en) Hot rolled steel sheet and method for manufacturing same
EP3517648A4 (en) Steel sheet for carburizing, and production method for steel sheet for carburizing
EP3495530A4 (en) Steel sheet and plated steel sheet
EP3556482A4 (en) Rolling roll and plated steel sheet produced thereby
EP3467135A4 (en) Thin steel sheet, and production method therefor

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20190114

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

A4 Supplementary search report drawn up and despatched

Effective date: 20190513

RIC1 Information provided on ipc code assigned before grant

Ipc: C21D 9/46 20060101ALI20190507BHEP

Ipc: C22C 38/12 20060101ALI20190507BHEP

Ipc: B22D 11/00 20060101ALI20190507BHEP

Ipc: C22C 38/02 20060101ALI20190507BHEP

Ipc: C21D 6/02 20060101ALI20190507BHEP

Ipc: C22C 38/04 20060101ALI20190507BHEP

Ipc: C21D 8/02 20060101ALI20190507BHEP

Ipc: C22C 38/14 20060101AFI20190507BHEP

Ipc: C22C 38/00 20060101ALI20190507BHEP

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20200116

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20200603