EP4119693A4 - Low-cost austenitic stainless steel having high strength and high formability, and method for manufacturing same - Google Patents

Low-cost austenitic stainless steel having high strength and high formability, and method for manufacturing same Download PDF

Info

Publication number: EP4119693A4
Authority: EP; European Patent Office
Prior art keywords: low; stainless steel; austenitic stainless; manufacturing same; high strength
Prior art date: 2020-04-22
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.): Pending

Application number

EP21793437.1A

Other languages

German (de)

French (fr)

Other versions

EP4119693A1 (en

Inventor

Seokweon SONG

Jong-Su Paek

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.)

2020-04-22

Filing date

2021-02-02

Publication date

2024-04-24

2021-02-02 Application filed by Posco Co Ltd filed Critical Posco Co Ltd

2023-01-18 Publication of EP4119693A1 publication Critical patent/EP4119693A1/en

2024-04-24 Publication of EP4119693A4 publication Critical patent/EP4119693A4/en

Status Pending 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
- 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
- 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
- C21D8/0221—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 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 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
- C21D8/0221—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 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 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
- C21D8/0221—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 characterised by the working steps
- C21D8/0242—Flattening; Dressing; Flexing
- 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
- C21D8/0247—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 characterised by the heat treatment
- 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
- C21D8/0247—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 characterised by the heat treatment
- C21D8/0263—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 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 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
- C21D8/0247—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 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
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium 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
- C22C38/38—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
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
- 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

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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 Sheet Steel (AREA)

EP21793437.1A 2020-04-22 2021-02-02 Low-cost austenitic stainless steel having high strength and high formability, and method for manufacturing same Pending EP4119693A4 (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
KR1020200048614A KR102385472B1 (en)	2020-04-22	2020-04-22	High-strength, high-formability, low cost austenitic stainless steel and manufacturing method thereof
PCT/KR2021/001345 WO2021215630A1 (en)	2020-04-22	2021-02-02	Low-cost austenitic stainless steel having high strength and high formability, and method for manufacturing same

Publications (2)

Publication Number	Publication Date
EP4119693A1 EP4119693A1 (en)	2023-01-18
EP4119693A4 true EP4119693A4 (en)	2024-04-24

Family

ID=78269451

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP21793437.1A Pending EP4119693A4 (en)	2020-04-22	2021-02-02	Low-cost austenitic stainless steel having high strength and high formability, and method for manufacturing same

Country Status (6)

Country	Link
US (1)	US20230142021A1 (en)
EP (1)	EP4119693A4 (en)
JP (1)	JP7395769B2 (en)
KR (1)	KR102385472B1 (en)
CN (1)	CN115398022B (en)
WO (1)	WO2021215630A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
KR102463015B1 (en) *	2020-11-23	2022-11-03	주식회사 포스코	High-strength austenitic stainless steel with excellent hot workability
KR20230091618A (en) *	2021-12-16	2023-06-23	주식회사 포스코	Austenitic stainless steel and method for producing the same

Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
KR20030055029A (en) *	2001-12-26	2003-07-02	주식회사 포스코	Workhardenable austenitic stainless seels
KR20060025873A (en) *	2004-09-17	2006-03-22	주식회사 포스코	High Manganese High Nitrogen Austenitic Stainless Steel with Excellent Hot Workability and Cold Workability
KR20060075725A (en) *	2004-12-29	2006-07-04	주식회사 포스코	Work Hardening Low Nickel Austenitic Stainless Steel
KR20060110103A (en) *	2005-04-19	2006-10-24	주식회사 포스코	High Manganese and Nitrogen Austenitic Stainless Steels
CN101724790A (en) *	2008-10-23	2010-06-09	宝山钢铁股份有限公司	Low-nickel austenitic stainless steel and manufacturing method thereof
CN109112430A (en) *	2017-06-26	2019-01-01	宝钢不锈钢有限公司	A kind of low-cost high-strength low-nickel austenitic stainless steel and manufacturing method

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US5286310A (en) *	1992-10-13	1994-02-15	Allegheny Ludlum Corporation	Low nickel, copper containing chromium-nickel-manganese-copper-nitrogen austenitic stainless steel
JP5165236B2 (en) *	2006-12-27	2013-03-21	新日鐵住金ステンレス株式会社	Stainless steel plate for structural members with excellent shock absorption characteristics
CN101270455B (en) *	2007-03-23	2010-08-11	宝山钢铁股份有限公司	1000MPa nickel-saving metastable austenitic stainless steel
FI125442B (en) *	2010-05-06	2015-10-15	Outokumpu Oy	Low nickel austenitic stainless steel and use of steel
JP6095619B2 (en) *	2014-08-19	2017-03-15	日新製鋼株式会社	Austenitic stainless steel sheet and metal gasket
KR101638007B1 (en)	2014-12-11	2016-07-13	한국기계연구원	High strength and high toughness austenite stainless steel with reduced nickel content
KR101903174B1 (en) *	2016-12-13	2018-10-01	주식회사 포스코	Low alloy steel sheet with excellent strength and ductility
KR101952818B1 (en) *	2017-09-25	2019-02-28	주식회사포스코	Low alloy steel sheet with high strength and ductility and method of manufacturing same
CN109837470B (en) *	2017-11-29	2022-04-01	宝钢德盛不锈钢有限公司	High-strength nitrogen-containing economical austenitic stainless steel and manufacturing method thereof

2020
- 2020-04-22 KR KR1020200048614A patent/KR102385472B1/en active Active
2021
- 2021-02-02 CN CN202180028609.8A patent/CN115398022B/en active Active
- 2021-02-02 JP JP2022564367A patent/JP7395769B2/en active Active
- 2021-02-02 US US17/918,014 patent/US20230142021A1/en active Pending
- 2021-02-02 WO PCT/KR2021/001345 patent/WO2021215630A1/en not_active Ceased
- 2021-02-02 EP EP21793437.1A patent/EP4119693A4/en active Pending

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
KR20030055029A (en) *	2001-12-26	2003-07-02	주식회사 포스코	Workhardenable austenitic stainless seels
KR20060025873A (en) *	2004-09-17	2006-03-22	주식회사 포스코	High Manganese High Nitrogen Austenitic Stainless Steel with Excellent Hot Workability and Cold Workability
KR20060075725A (en) *	2004-12-29	2006-07-04	주식회사 포스코	Work Hardening Low Nickel Austenitic Stainless Steel
KR20060110103A (en) *	2005-04-19	2006-10-24	주식회사 포스코	High Manganese and Nitrogen Austenitic Stainless Steels
CN101724790A (en) *	2008-10-23	2010-06-09	宝山钢铁股份有限公司	Low-nickel austenitic stainless steel and manufacturing method thereof
CN109112430A (en) *	2017-06-26	2019-01-01	宝钢不锈钢有限公司	A kind of low-cost high-strength low-nickel austenitic stainless steel and manufacturing method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2021215630A1 *

Also Published As

Publication number	Publication date
CN115398022A (en)	2022-11-25
EP4119693A1 (en)	2023-01-18
KR102385472B1 (en)	2022-04-13
WO2021215630A1 (en)	2021-10-28
KR20210130426A (en)	2021-11-01
JP2023522999A (en)	2023-06-01
US20230142021A1 (en)	2023-05-11
JP7395769B2 (en)	2023-12-11
CN115398022B (en)	2023-11-28

Legal Events

Date	Code	Title	Description
2021-10-29	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE
2022-12-16	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
2022-12-16	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE
2023-01-18	17P	Request for examination filed	Effective date: 20221011
2023-01-18	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
2023-07-26	DAV	Request for validation of the european patent (deleted)
2023-07-26	DAX	Request for extension of the european patent (deleted)
2024-04-24	A4	Supplementary search report drawn up and despatched	Effective date: 20240327
2024-04-24	RIC1	Information provided on ipc code assigned before grant	Ipc: C21D 1/26 20060101ALI20240321BHEP Ipc: C21D 6/00 20060101ALI20240321BHEP Ipc: C21D 8/02 20060101ALI20240321BHEP Ipc: C21D 9/46 20060101ALI20240321BHEP Ipc: C22C 38/20 20060101ALI20240321BHEP Ipc: C22C 38/38 20060101ALI20240321BHEP Ipc: C22C 38/00 20060101ALI20240321BHEP Ipc: C22C 38/02 20060101ALI20240321BHEP Ipc: C22C 38/42 20060101ALI20240321BHEP Ipc: C22C 38/58 20060101AFI20240321BHEP
2024-04-24	RIN1	Information on inventor provided before grant (corrected)	Inventor name: PAEK, JONG-SU Inventor name: SONG, SEOKWEON

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