EP3730644A4 - High-strength steel with excellent toughness of welding heat affected zone and manufacturing method thereof - Google Patents

High-strength steel with excellent toughness of welding heat affected zone and manufacturing method thereof Download PDF

Info

Publication number: EP3730644A4
Authority: EP; European Patent Office
Prior art keywords: manufacturing; strength steel; affected zone; heat affected; welding heat
Prior art date: 2017-12-24
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.): Granted

Application number

EP18891918.7A

Other languages

German (de)

French (fr)

Other versions

EP3730644B1 (en

EP3730644A1 (en

Inventor

Jae-Yong CHAE

Sang-Deok Kang

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.)

2017-12-24

Filing date

2018-12-21

Publication date

2020-10-28

2018-12-21 Application filed by Posco Co Ltd filed Critical Posco Co Ltd

2020-10-28 Publication of EP3730644A4 publication Critical patent/EP3730644A4/en

2020-10-28 Publication of EP3730644A1 publication Critical patent/EP3730644A1/en

2024-06-26 Application granted granted Critical

2024-06-26 Publication of EP3730644B1 publication Critical patent/EP3730644B1/en

Status Active legal-status Critical Current

2038-12-21 Anticipated expiration legal-status Critical

Links

229910000831 Steel Inorganic materials 0.000 title 1
238000004519 manufacturing process Methods 0.000 title 1
239000010959 steel Substances 0.000 title 1
238000003466 welding Methods 0.000 title 1

Classifications

- 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
- 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
- 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
- C21D8/0221—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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
- 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
- C22C38/06—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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
- 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
- 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
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
- 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
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
- 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
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
- 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
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
- 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
- C21D2211/005—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

Landscapes

Chemical & Material Sciences (AREA)
Engineering & Computer Science (AREA)
Materials Engineering (AREA)
Mechanical Engineering (AREA)
Metallurgy (AREA)
Organic Chemistry (AREA)
Physics & Mathematics (AREA)
Thermal Sciences (AREA)
Crystallography & Structural Chemistry (AREA)
Heat Treatment Of Steel (AREA)

EP18891918.7A 2017-12-24 2018-12-21 High-strength steel with excellent toughness of welding heat affected zone and manufacturing method thereof Active EP3730644B1 (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
KR1020170178934A KR101999016B1 (en)	2017-12-24	2017-12-24	High strength steel having excellent heat affected zone toughness and method for manufacturing the same
PCT/KR2018/016522 WO2019125075A1 (en)	2017-12-24	2018-12-21	High-strength steel with excellent toughness of welding heat affected zone and manufacturing method thereof

Publications (3)

Publication Number	Publication Date
EP3730644A4 true EP3730644A4 (en)	2020-10-28
EP3730644A1 EP3730644A1 (en)	2020-10-28
EP3730644B1 EP3730644B1 (en)	2024-06-26

Family

ID=66993742

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP18891918.7A Active EP3730644B1 (en)	2017-12-24	2018-12-21	High-strength steel with excellent toughness of welding heat affected zone and manufacturing method thereof

Country Status (5)

Country	Link
US (1)	US20200325562A1 (en)
EP (1)	EP3730644B1 (en)
KR (1)	KR101999016B1 (en)
CN (1)	CN111542632A (en)
WO (1)	WO2019125075A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
KR20020011470A (en) *	2000-08-02	2002-02-09	이구택	Steel plate having superior toughness in weld heat-affected zone and method for manufacturing the same, welding fabric using the same
JP2004091860A (en) *	2002-08-30	2004-03-25	Kobe Steel Ltd	Weld metal for low-alloy heat-resisting steel
JP2005171326A (en) *	2003-12-11	2005-06-30	Nippon Steel Corp	High-carbon steel rail superior in surface damage resistance and interior-fatigue-damage resistance
KR20100061601A (en) *	2008-11-29	2010-06-08	주식회사 포스코	High strength ship-building steel with excellent general corrosion and pitting corrosion resistance at low ph chloride solution and excellent haz toughness and manufacturing method for the same
KR20120014413A (en) *	2010-08-09	2012-02-17	주식회사 포스코	High strength steel plate for welding structure with superior haz toughness for high heat input welding and method for manufacturing the same
KR20160130312A (en) *	2014-04-17	2016-11-10	가부시키가이샤 고베 세이코쇼	Welded metal having excellent strength, toughness and sr cracking resistance

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JP4022958B2 (en)	1997-11-11	2007-12-19	Ｊｆｅスチール株式会社	High toughness thick steel plate with excellent weld heat affected zone toughness and method for producing the same
KR20160078772A (en) *	2014-12-24	2016-07-05	주식회사 포스코	The steel sheet having excellent heat affected zone toughness and method for manufacturing the same

2017
- 2017-12-24 KR KR1020170178934A patent/KR101999016B1/en active IP Right Grant
2018
- 2018-12-21 US US16/957,454 patent/US20200325562A1/en not_active Abandoned
- 2018-12-21 CN CN201880084245.3A patent/CN111542632A/en active Pending
- 2018-12-21 EP EP18891918.7A patent/EP3730644B1/en active Active
- 2018-12-21 WO PCT/KR2018/016522 patent/WO2019125075A1/en unknown

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
KR20020011470A (en) *	2000-08-02	2002-02-09	이구택	Steel plate having superior toughness in weld heat-affected zone and method for manufacturing the same, welding fabric using the same
JP2004091860A (en) *	2002-08-30	2004-03-25	Kobe Steel Ltd	Weld metal for low-alloy heat-resisting steel
JP2005171326A (en) *	2003-12-11	2005-06-30	Nippon Steel Corp	High-carbon steel rail superior in surface damage resistance and interior-fatigue-damage resistance
KR20100061601A (en) *	2008-11-29	2010-06-08	주식회사 포스코	High strength ship-building steel with excellent general corrosion and pitting corrosion resistance at low ph chloride solution and excellent haz toughness and manufacturing method for the same
KR20120014413A (en) *	2010-08-09	2012-02-17	주식회사 포스코	High strength steel plate for welding structure with superior haz toughness for high heat input welding and method for manufacturing the same
KR20160130312A (en) *	2014-04-17	2016-11-10	가부시키가이샤 고베 세이코쇼	Welded metal having excellent strength, toughness and sr cracking resistance

Also Published As

Publication number	Publication date
WO2019125075A1 (en)	2019-06-27
EP3730644B1 (en)	2024-06-26
KR101999016B1 (en)	2019-07-10
KR20190077186A (en)	2019-07-03
EP3730644A1 (en)	2020-10-28
CN111542632A (en)	2020-08-14
US20200325562A1 (en)	2020-10-15

Legal Events

Date	Code	Title	Description
2019-06-29	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE
2020-09-25	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
2020-09-25	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE
2020-10-28	17P	Request for examination filed	Effective date: 20200720
2020-10-28	A4	Supplementary search report drawn up and despatched	Effective date: 20200928
2020-10-28	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
2020-10-28	AX	Request for extension of the european patent	Extension state: BA ME
2021-03-31	DAV	Request for validation of the european patent (deleted)
2021-03-31	DAX	Request for extension of the european patent (deleted)
2022-11-23	RAP3	Party data changed (applicant data changed or rights of an application transferred)	Owner name: POSCO HOLDINGS INC.
2023-02-08	RAP1	Party data changed (applicant data changed or rights of an application transferred)	Owner name: POSCO CO., LTD
2023-09-14	GRAP	Despatch of communication of intention to grant a patent	Free format text: ORIGINAL CODE: EPIDOSNIGR1
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