EP3825434A4 - NON-ORIENTED ELECTRIC STEEL SHEET AND METHOD OF MANUFACTURING THEREOF - Google Patents
NON-ORIENTED ELECTRIC STEEL SHEET AND METHOD OF MANUFACTURING THEREOF Download PDFInfo
- Publication number
- EP3825434A4 EP3825434A4 EP18926641.4A EP18926641A EP3825434A4 EP 3825434 A4 EP3825434 A4 EP 3825434A4 EP 18926641 A EP18926641 A EP 18926641A EP 3825434 A4 EP3825434 A4 EP 3825434A4
- Authority
- EP
- European Patent Office
- Prior art keywords
- steel sheet
- electrical steel
- oriented electrical
- manufacturing same
- manufacturing
- 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
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
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
-
- 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
-
- 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
- C21D6/002—Heat treatment of ferrous alloys containing Cr
-
- 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
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
-
- 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
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1222—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
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1233—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 by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1272—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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1277—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular surface treatment
- C21D8/1283—Application of a separating or insulating coating
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of 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
- C22C38/18—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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Soft Magnetic Materials (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020180083531A KR102106409B1 (ko) | 2018-07-18 | 2018-07-18 | 무방향성 전기강판 및 그 제조방법 |
PCT/KR2018/016039 WO2020017713A1 (ko) | 2018-07-18 | 2018-12-17 | 무방향성 전기강판 및 그 제조방법 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3825434A1 EP3825434A1 (en) | 2021-05-26 |
EP3825434A4 true EP3825434A4 (en) | 2021-07-07 |
Family
ID=69163754
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18926641.4A Pending EP3825434A4 (en) | 2018-07-18 | 2018-12-17 | NON-ORIENTED ELECTRIC STEEL SHEET AND METHOD OF MANUFACTURING THEREOF |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3825434A4 (ko) |
JP (1) | JP7273945B2 (ko) |
KR (1) | KR102106409B1 (ko) |
CN (1) | CN112424386A (ko) |
WO (1) | WO2020017713A1 (ko) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7477748B2 (ja) * | 2020-02-20 | 2024-05-02 | 日本製鉄株式会社 | 無方向性電磁鋼板および熱延鋼板 |
KR20230095257A (ko) * | 2021-12-22 | 2023-06-29 | 주식회사 포스코 | 무방향성 전기강판 및 그 제조방법 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6428632B1 (en) * | 1999-11-26 | 2002-08-06 | Kawasaki Steel Corporation | Non-oriented electromagnetic steel sheet having reduced magnetic anisotropy in high frequency region and excellent press workability |
JP2013010982A (ja) * | 2011-06-28 | 2013-01-17 | Jfe Steel Corp | 無方向性電磁鋼板の製造方法 |
JP2013044010A (ja) * | 2011-08-23 | 2013-03-04 | Nippon Steel & Sumitomo Metal Corp | 無方向性電磁鋼板およびその製造方法 |
KR20130076547A (ko) * | 2011-12-28 | 2013-07-08 | 주식회사 포스코 | 무방향성 전기강판 및 그 제조방법 |
US20150348686A1 (en) * | 2013-02-22 | 2015-12-03 | Jfe Steel Corporation | Hot-rolled steel sheet for producing non-oriented electrical steel sheet and method of producing same |
WO2017098800A1 (ja) * | 2015-12-09 | 2017-06-15 | Jfeスチール株式会社 | 無方向性電磁鋼板の製造方法 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2701314B2 (ja) * | 1988-05-10 | 1998-01-21 | 日本鋼管株式会社 | 磁気特性に優れた無方向性電磁鋼板及びその製造方法 |
JP4116748B2 (ja) | 1999-12-16 | 2008-07-09 | 新日本製鐵株式会社 | 磁石埋設型のモータ用無方向性電磁鋼板 |
JP4589747B2 (ja) * | 2005-02-04 | 2010-12-01 | 新日本製鐵株式会社 | 磁気特性に優れた無方向性電磁鋼板とその製造方法および歪取焼鈍方法 |
CN101812571B (zh) * | 2009-02-24 | 2011-09-21 | 宝山钢铁股份有限公司 | 电工钢热轧带钢常化处理中防止内氧化层的方法 |
KR20140060725A (ko) * | 2012-11-12 | 2014-05-21 | 주식회사 포스코 | 무방향성 전기강판 및 그 제조방법 |
JP5975076B2 (ja) * | 2014-08-27 | 2016-08-23 | Jfeスチール株式会社 | 無方向性電磁鋼板およびその製造方法 |
JP6627226B2 (ja) * | 2015-02-24 | 2020-01-08 | 日本製鉄株式会社 | 無方向性電磁鋼板の製造方法 |
JP6319586B2 (ja) * | 2015-04-10 | 2018-05-09 | Jfeスチール株式会社 | 無方向性電磁鋼板の製造方法 |
JP6390876B2 (ja) * | 2015-08-04 | 2018-09-19 | Jfeスチール株式会社 | 磁気特性に優れる無方向性電磁鋼板の製造方法 |
JP6794704B2 (ja) | 2016-08-05 | 2020-12-02 | 日本製鉄株式会社 | 無方向性電磁鋼板、無方向性電磁鋼板の製造方法及びモータコアの製造方法 |
JP6794705B2 (ja) * | 2016-08-05 | 2020-12-02 | 日本製鉄株式会社 | 無方向性電磁鋼板、無方向性電磁鋼板の製造方法及びモータコアの製造方法 |
JP6724712B2 (ja) | 2016-10-18 | 2020-07-15 | 日本製鉄株式会社 | 無方向性電磁鋼板 |
KR101918720B1 (ko) * | 2016-12-19 | 2018-11-14 | 주식회사 포스코 | 무방향성 전기강판 및 그 제조방법 |
-
2018
- 2018-07-18 KR KR1020180083531A patent/KR102106409B1/ko active IP Right Grant
- 2018-12-17 WO PCT/KR2018/016039 patent/WO2020017713A1/ko active Application Filing
- 2018-12-17 JP JP2021502790A patent/JP7273945B2/ja active Active
- 2018-12-17 CN CN201880095745.7A patent/CN112424386A/zh active Pending
- 2018-12-17 EP EP18926641.4A patent/EP3825434A4/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6428632B1 (en) * | 1999-11-26 | 2002-08-06 | Kawasaki Steel Corporation | Non-oriented electromagnetic steel sheet having reduced magnetic anisotropy in high frequency region and excellent press workability |
JP2013010982A (ja) * | 2011-06-28 | 2013-01-17 | Jfe Steel Corp | 無方向性電磁鋼板の製造方法 |
JP2013044010A (ja) * | 2011-08-23 | 2013-03-04 | Nippon Steel & Sumitomo Metal Corp | 無方向性電磁鋼板およびその製造方法 |
KR20130076547A (ko) * | 2011-12-28 | 2013-07-08 | 주식회사 포스코 | 무방향성 전기강판 및 그 제조방법 |
US20150348686A1 (en) * | 2013-02-22 | 2015-12-03 | Jfe Steel Corporation | Hot-rolled steel sheet for producing non-oriented electrical steel sheet and method of producing same |
WO2017098800A1 (ja) * | 2015-12-09 | 2017-06-15 | Jfeスチール株式会社 | 無方向性電磁鋼板の製造方法 |
Non-Patent Citations (1)
Title |
---|
See also references of WO2020017713A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2020017713A1 (ko) | 2020-01-23 |
JP7273945B2 (ja) | 2023-05-15 |
KR20200009321A (ko) | 2020-01-30 |
JP2021532257A (ja) | 2021-11-25 |
EP3825434A1 (en) | 2021-05-26 |
CN112424386A (zh) | 2021-02-26 |
KR102106409B1 (ko) | 2020-05-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3556884A4 (en) | NON-ORIENTED ELECTRIC STEEL SHEET AND MANUFACTURING METHOD THEREOF | |
EP4079887A4 (en) | NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD OF MANUFACTURING THEREOF | |
EP3904551A4 (en) | NON-ORIENTED ELECTRICAL STEEL SHEET AND PRODUCTION METHOD THEREOF | |
EP3556882A4 (en) | NON-ALIGNED ELECTRIC STEEL PLATE AND METHOD OF MANUFACTURING THEREOF | |
EP3517646A4 (en) | CORNORATED ELECTRIC STEEL PLATE AND METHOD FOR THE PRODUCTION THEREOF | |
EP3733891A4 (en) | NON-ORIENTED ELECTRIC STEEL SHEET AND METHOD FOR MANUFACTURING ITEM | |
EP3556883A4 (en) | NON-ORIENTED ELECTRIC STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME | |
EP4079896A4 (en) | NON-ORIENTED ELECTRICAL STEEL SHEET, AND METHOD OF MANUFACTURING THEREOF | |
EP3733880A4 (en) | NON-ALIGNED ELECTRIC STEEL SHEET AND MANUFACTURING METHOD FOR IT | |
EP3561102A4 (en) | NON-ORIENTED ELECTROSTAHLBLECH AND METHOD FOR THE PRODUCTION THEREOF | |
EP3888906A4 (en) | ELECTRICAL STEEL SHEET AND METHOD OF MANUFACTURING IT | |
EP4079893A4 (en) | NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD OF MANUFACTURING THEREOF | |
EP3556878A4 (en) | NON-ORIENTED GRAIN MAGNETIC STEEL SHEET AND MANUFACTURING METHOD THEREOF | |
EP3913092A4 (en) | GRAIN ORIENTATED ELECTRICAL STEEL SHEET AND METHOD OF MANUFACTURING THEREOF | |
EP3733916A4 (en) | NON-ORIENTED ELECTRIC STEEL SHEET AND ITS PRODUCTION PROCESS | |
EP4079889A4 (en) | NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD OF MANUFACTURING THEREOF | |
EP3733907A4 (en) | NON-ORIENTED ELECTRIC STEEL SHEET AND METHOD FOR MANUFACTURING ITEM | |
EP3546609A4 (en) | NON-ALIGNED ELECTRIC STEEL PLATE AND METHOD OF MANUFACTURING THEREOF | |
EP3859019A4 (en) | GRAIN ORIENTED ELECTRIC STEEL SHEET AND METHOD FOR MANUFACTURING THEREOF | |
EP3901311A4 (en) | ORIENTED ELECTRICAL STEEL AND METHOD OF MANUFACTURE THEREOF | |
EP3901972A4 (en) | GRAIN ORIENTATED ELECTRIC SHEET AND METHOD FOR MANUFACTURING THEREOF | |
EP3733901A4 (en) | NON-ORIENTED ELECTRIC STEEL SHEET AND ITS PRODUCTION PROCESS | |
EP3859037A4 (en) | NON-ORIENTED GRAIN ELECTRIC STEEL SHEET AND ITS MANUFACTURING PROCESS | |
EP3798328A4 (en) | NON-ORIENTED ELECTROMAGNETIC STEEL SHEET AND ITS MANUFACTURING PROCESS | |
EP4079891A4 (en) | NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD OF MANUFACTURING THEREOF |
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: 20210202 |
|
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 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: C22C 38/34 20060101AFI20210519BHEP Ipc: C22C 38/06 20060101ALI20210519BHEP Ipc: C22C 38/38 20060101ALI20210519BHEP Ipc: C22C 38/04 20060101ALI20210519BHEP Ipc: C22C 38/60 20060101ALI20210519BHEP Ipc: C22C 38/00 20060101ALI20210519BHEP Ipc: C21D 9/46 20060101ALI20210519BHEP Ipc: C21D 8/12 20060101ALI20210519BHEP Ipc: C21D 6/00 20060101ALI20210519BHEP |
|
A4 | Supplementary search report drawn up and despatched |
Effective date: 20210604 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: C22C 38/34 20060101AFI20210528BHEP Ipc: C22C 38/06 20060101ALI20210528BHEP Ipc: C22C 38/38 20060101ALI20210528BHEP Ipc: C22C 38/04 20060101ALI20210528BHEP Ipc: C22C 38/60 20060101ALI20210528BHEP Ipc: C22C 38/00 20060101ALI20210528BHEP Ipc: C21D 9/46 20060101ALI20210528BHEP Ipc: C21D 8/12 20060101ALI20210528BHEP Ipc: C21D 6/00 20060101ALI20210528BHEP |
|
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 |