EP3889314A1 - Mit einer al-fe-legierung plattiertes stahlblech für die warmverformung mit ausgezeichneter korrosionsbeständigkeit und hitzebeständigkeit, formteil aus einer heisspressung und verfahren zu seiner herstellung - Google Patents

Mit einer al-fe-legierung plattiertes stahlblech für die warmverformung mit ausgezeichneter korrosionsbeständigkeit und hitzebeständigkeit, formteil aus einer heisspressung und verfahren zu seiner herstellung Download PDF

Info

Publication number
EP3889314A1
EP3889314A1 EP19891044.0A EP19891044A EP3889314A1 EP 3889314 A1 EP3889314 A1 EP 3889314A1 EP 19891044 A EP19891044 A EP 19891044A EP 3889314 A1 EP3889314 A1 EP 3889314A1
Authority
EP
European Patent Office
Prior art keywords
steel sheet
alloy
layer
plated
weight
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.)
Pending
Application number
EP19891044.0A
Other languages
English (en)
French (fr)
Other versions
EP3889314A4 (de
Inventor
Seong-Woo Kim
Jin-Keun Oh
Sang-Heon Kim
Yeol-Rae Cho
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
Priority claimed from PCT/KR2019/016761 external-priority patent/WO2020111879A1/ko
Publication of EP3889314A1 publication Critical patent/EP3889314A1/de
Publication of EP3889314A4 publication Critical patent/EP3889314A4/de
Pending legal-status Critical Current

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/021Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material including at least one metal alloy layer
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/78Combined heat-treatments not provided for above
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C30/00Alloys containing less than 50% by weight of each constituent
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/02Ferrous alloys, e.g. steel alloys containing silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/06Ferrous alloys, e.g. steel alloys containing aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/14Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/12Aluminium or alloys based thereon
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/26After-treatment
    • C23C2/28Thermal after-treatment, e.g. treatment in oil bath
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/26After-treatment
    • C23C2/28Thermal after-treatment, e.g. treatment in oil bath
    • C23C2/29Cooling or quenching
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36Elongated material
    • C23C2/40Plates; Strips
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/027Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material including at least one metal matrix material comprising a mixture of at least two metals or metal phases or metal matrix composites, e.g. metal matrix with embedded inorganic hard particles, CERMET, MMC.
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/028Including graded layers in composition or in physical properties, e.g. density, porosity, grain size
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C30/00Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Composite Materials (AREA)
  • Inorganic Chemistry (AREA)
  • Coating With Molten Metal (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
EP19891044.0A 2018-11-30 2019-11-29 Mit einer al-fe-legierung plattiertes stahlblech für die warmverformung mit ausgezeichneter korrosionsbeständigkeit und hitzebeständigkeit, formteil aus einer heisspressung und verfahren zu seiner herstellung Pending EP3889314A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR20180152574 2018-11-30
PCT/KR2019/016761 WO2020111879A1 (ko) 2018-11-30 2019-11-29 내식성 및 내열성이 우수한 열간성형용 알루미늄-철 합금 도금 강판, 열간 프레스 성형 부재 및 이들의 제조방법

Publications (2)

Publication Number Publication Date
EP3889314A1 true EP3889314A1 (de) 2021-10-06
EP3889314A4 EP3889314A4 (de) 2021-11-10

Family

ID=71082084

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19891044.0A Pending EP3889314A4 (de) 2018-11-30 2019-11-29 Mit einer al-fe-legierung plattiertes stahlblech für die warmverformung mit ausgezeichneter korrosionsbeständigkeit und hitzebeständigkeit, formteil aus einer heisspressung und verfahren zu seiner herstellung

Country Status (3)

Country Link
EP (1) EP3889314A4 (de)
KR (2) KR102264726B1 (de)
CN (1) CN113166913B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3889311A4 (de) * 2018-11-30 2022-01-26 Posco Heissgepresstes formteil und herstellungsverfahren dafür

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230171168A (ko) 2022-06-13 2023-12-20 주식회사 엔디소프트 화자분할 기술이 적용된 앱을 이용한 단말기 음성 대화 방법

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2780984B1 (fr) 1998-07-09 2001-06-22 Lorraine Laminage Tole d'acier laminee a chaud et a froid revetue et comportant une tres haute resistance apres traitement thermique
JP4453853B2 (ja) * 2000-02-22 2010-04-21 日新製鋼株式会社 加工性,耐熱性,耐酸化性に優れた溶融アルミめっき系鋼板の製造方法
JP4325442B2 (ja) * 2004-03-12 2009-09-02 住友金属工業株式会社 溶融亜鉛系めっき鋼材の製造方法
KR100851163B1 (ko) * 2006-12-29 2008-08-08 주식회사 포스코 도금부착성 및 굽힘가공성이 우수한 초고강도 강판 및 이를이용한 합금화 용융아연도금강판의 제조방법
KR20120041544A (ko) * 2010-10-21 2012-05-02 주식회사 포스코 도금성, 도금밀착성 및 스폿용접성이 우수한 용융아연도금강판 및 그 제조방법
KR101220708B1 (ko) * 2010-12-27 2013-01-09 주식회사 포스코 내파우더링성이 우수한 고망간 고알루미늄 합금화 용융아연도금강판 및 그 제조방법
JP5860959B2 (ja) * 2011-06-28 2016-02-16 ポスコ めっき層の安定性に優れた熱間プレス成形用めっき鋼板
JP6296805B2 (ja) 2014-01-23 2018-03-20 Ai Technology株式会社 検知装置
KR101569505B1 (ko) * 2014-12-24 2015-11-30 주식회사 포스코 내박리성이 우수한 hpf 성형부재 및 그 제조방법
KR101569509B1 (ko) * 2014-12-24 2015-11-17 주식회사 포스코 프레스성형시 내파우더링성이 우수한 hpf 성형부재 및 이의 제조방법
KR101696069B1 (ko) * 2015-05-26 2017-01-13 주식회사 포스코 내박리성이 우수한 hpf 성형부재 및 그 제조방법
KR101696121B1 (ko) * 2015-12-23 2017-01-13 주식회사 포스코 내수소지연파괴특성, 내박리성 및 용접성이 우수한 열간성형용 알루미늄-철 합금 도금강판 및 이를 이용한 열간성형 부재
KR101879104B1 (ko) * 2016-12-23 2018-07-16 주식회사 포스코 TWB 용접 특성이 우수한 열간성형용 Al-Fe 합금화 도금강판, 열간성형 부재 및 그들의 제조방법
CN108588612B (zh) * 2018-04-28 2019-09-20 育材堂(苏州)材料科技有限公司 热冲压成形构件、热冲压成形用预涂镀钢板及热冲压成形工艺

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3889311A4 (de) * 2018-11-30 2022-01-26 Posco Heissgepresstes formteil und herstellungsverfahren dafür
US11578397B2 (en) 2018-11-30 2023-02-14 Posco Co., Ltd Hot press-formed part, and manufacturing method thereof
US11897014B2 (en) 2018-11-30 2024-02-13 Posco Co., Ltd Hot press-formed part, and manufacturing method thereof

Also Published As

Publication number Publication date
CN113166913B (zh) 2023-12-29
KR20200066240A (ko) 2020-06-09
KR102264726B1 (ko) 2021-06-16
EP3889314A4 (de) 2021-11-10
KR20210070967A (ko) 2021-06-15
KR102450998B1 (ko) 2022-10-07
CN113166913A (zh) 2021-07-23

Similar Documents

Publication Publication Date Title
EP3561142B1 (de) Heissgepresstes plattiertes stahlblech mit hervorragender schlagfestigkeit, heisspressformelement und herstellungsverfahren dafür
EP3632587B1 (de) Stahlblech für heisspressgeformtes element mit hervorragender lackhaftung und nachlackierkorrosionsbeständigkeit und verfahren zur herstellung davon
US20230039057A1 (en) Steel sheet plated with al-fe alloy for hot press forming having excellent corrosion resistance and heat resistance, hot press formed part, and manufacturing method therefor
JP7216358B2 (ja) 水素脆性に対する抵抗性に優れた熱間プレス成形部材及びその製造方法
EP3889315A1 (de) Plattiertes stahlblech auf der basis von eisen-aluminium für heisspressformen mit hervorragenden eigenschaften gegen verzögerten wasserstoffinduzierten bruch und punktschweisseigenschaften sowie verfahren zu seiner herstellung
JP5456026B2 (ja) 延性に優れ、エッジ部に亀裂のない高強度鋼板、溶融亜鉛メッキ鋼板及びその製造方法
KR102450998B1 (ko) 내식성 및 내열성이 우수한 열간성형용 알루미늄-철 합금 도금 강판, 열간 프레스 성형 부재 및 이들의 제조방법
KR102153194B1 (ko) 액상금속취화(lme) 균열 저항성이 우수한 초고강도 고연성 냉연강판, 도금강판 및 이들의 제조방법
JP2024010039A (ja) 熱間成形部材及びその製造方法
EP2893050B1 (de) Leichtgewichtiges und hochfestes ferritisches stahlblech mit hervorragender steifigkeit und duktilität und verfahren zur herstellung davon
EP3901315A1 (de) Plattiertes stahlblech für die heisspressumformung mit ausgezeichneten schlagzähigkeitseigenschaften nach der heisspressumformung, heisspressumgeformtes element und verfahren zu dessen herstellung
KR20210028627A (ko) 열간성형용 알루미늄 철 합금 도금강판 및 그 제조방법
EP3572546B1 (de) Hochfestes kaltgewalztes stahlblech und verfahren zur herstellung davon
KR102484978B1 (ko) 내파우더링성이 우수한 고강도 합금화 용융아연도금강판 및 그 제조방법
JP6828855B1 (ja) 鋼板およびその製造方法

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: 20210623

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

A4 Supplementary search report drawn up and despatched

Effective date: 20211008

RIC1 Information provided on ipc code assigned before grant

Ipc: C23C 30/00 20060101ALI20211004BHEP

Ipc: C23C 28/02 20060101ALI20211004BHEP

Ipc: C21D 1/78 20060101ALI20211004BHEP

Ipc: C22C 30/00 20060101ALI20211004BHEP

Ipc: C22C 38/02 20060101ALI20211004BHEP

Ipc: C22C 38/06 20060101ALI20211004BHEP

Ipc: C22C 38/14 20060101ALI20211004BHEP

Ipc: C22C 38/18 20060101ALI20211004BHEP

Ipc: C23C 2/40 20060101ALI20211004BHEP

Ipc: C23C 2/12 20060101ALI20211004BHEP

Ipc: C23C 2/28 20060101AFI20211004BHEP

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: POSCO HOLDINGS INC.

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: POSCO CO., LTD