CA2970151C - Steel sheet for low-temperature service having excellent surface processing quality and method for manufacturing same - Google Patents
Steel sheet for low-temperature service having excellent surface processing quality and method for manufacturing same Download PDFInfo
- Publication number
- CA2970151C CA2970151C CA2970151A CA2970151A CA2970151C CA 2970151 C CA2970151 C CA 2970151C CA 2970151 A CA2970151 A CA 2970151A CA 2970151 A CA2970151 A CA 2970151A CA 2970151 C CA2970151 C CA 2970151C
- Authority
- CA
- Canada
- Prior art keywords
- steel
- austenite
- satisfying
- low
- excluding
- 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.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 74
- 239000010959 steel Substances 0.000 title claims abstract description 74
- 238000004519 manufacturing process Methods 0.000 title claims description 23
- 238000012545 processing Methods 0.000 title abstract description 15
- 238000000034 method Methods 0.000 title description 9
- 239000010936 titanium Substances 0.000 claims abstract description 59
- 239000011572 manganese Substances 0.000 claims abstract description 57
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 27
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 25
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 25
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 23
- 239000010949 copper Substances 0.000 claims abstract description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 11
- 239000012535 impurity Substances 0.000 claims abstract description 11
- 230000014509 gene expression Effects 0.000 claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 9
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910001566 austenite Inorganic materials 0.000 claims description 62
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 33
- 239000002244 precipitate Substances 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 6
- -1 0.01-0.5 wt%) Substances 0.000 abstract 1
- 239000004615 ingredient Substances 0.000 abstract 1
- 239000013078 crystal Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 229910000734 martensite Inorganic materials 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 230000009466 transformation Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000593 degrading effect Effects 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 230000035882 stress Effects 0.000 description 5
- 230000002411 adverse Effects 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 230000036961 partial effect Effects 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000001953 recrystallisation Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000010953 base metal Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 101100113998 Mus musculus Cnbd2 gene Proteins 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000003949 liquefied natural gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 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
- 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
- C22C38/04—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
- 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
- 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
- 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
- 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
- C22C38/18—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
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with 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
- C22C38/18—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
- 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
- C21D2211/004—Dispersions; Precipitations
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)
- Heat Treatment Of Sheet Steel (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020140189137A KR101665821B1 (ko) | 2014-12-24 | 2014-12-24 | 표면 가공 품질이 우수한 저온용 강판 및 그 제조방법 |
| KR10-2014-0189137 | 2014-12-24 | ||
| PCT/KR2015/013554 WO2016105002A1 (ko) | 2014-12-24 | 2015-12-11 | 표면 가공 품질이 우수한 저온용 강판 및 그 제조방법 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2970151A1 CA2970151A1 (en) | 2016-06-30 |
| CA2970151C true CA2970151C (en) | 2021-01-19 |
Family
ID=56150966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2970151A Active CA2970151C (en) | 2014-12-24 | 2015-12-11 | Steel sheet for low-temperature service having excellent surface processing quality and method for manufacturing same |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20170362675A1 (ko) |
| EP (1) | EP3239328B1 (ko) |
| JP (2) | JP6810691B2 (ko) |
| KR (1) | KR101665821B1 (ko) |
| CN (1) | CN107109602B (ko) |
| CA (1) | CA2970151C (ko) |
| WO (1) | WO2016105002A1 (ko) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101940874B1 (ko) * | 2016-12-22 | 2019-01-21 | 주식회사 포스코 | 저온인성 및 항복강도가 우수한 고 망간 강 및 제조 방법 |
| EP3617337A4 (en) * | 2017-04-26 | 2020-03-25 | JFE Steel Corporation | Mn-RICH STEEL AND PROCESS FOR PRODUCING THE SAME |
| CN107190201B (zh) * | 2017-07-17 | 2019-03-26 | 武汉钢铁有限公司 | 液化石油气运输船用钢及制造方法 |
| EP3679594A4 (en) | 2017-09-07 | 2021-06-02 | Monash University | CAPACITIVE ENERGY STORAGE DEVICE AND ITS PRODUCTION PROCESS |
| KR102109270B1 (ko) | 2017-10-18 | 2020-05-12 | 주식회사 포스코 | 표면품질이 우수한 저온용 고 망간강재 및 제조방법 |
| KR102031455B1 (ko) * | 2017-12-26 | 2019-10-11 | 주식회사 포스코 | 저온인성이 우수한 열연강판, 강관 및 그 제조방법 |
| KR102123604B1 (ko) | 2018-03-29 | 2020-06-15 | 닛폰세이테츠 가부시키가이샤 | 오스테나이트계 내마모 강판 |
| KR102255827B1 (ko) * | 2018-10-25 | 2021-05-26 | 주식회사 포스코 | 표면품질이 우수한 극저온용 오스테나이트계 고망간 강재 및 그 제조방법 |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR920004941B1 (ko) | 1989-12-28 | 1992-06-22 | 포항종합제철 주식회사 | 극저온 특성이 우수한 고 망간강의 제조방법 |
| JPH0742549B2 (ja) * | 1990-09-28 | 1995-05-10 | 新日本製鐵株式会社 | リニアモーターカー鋼橋用高Ｍｎ非磁性鋼 |
| KR970001324B1 (ko) * | 1994-03-25 | 1997-02-05 | 김만제 | 열간가공성이 우수한 고망간강 및 그 열간압연 방법 |
| JPH09195007A (ja) * | 1996-01-19 | 1997-07-29 | Kawasaki Steel Corp | 耐食性に優れたＣｒ−Ｍｎ−Ｎ系オーステナイトステンレス鋼 |
| JP4141557B2 (ja) * | 1998-12-18 | 2008-08-27 | 松下電器産業株式会社 | 電子部品の実装装置および実装方法 |
| CN1236092C (zh) * | 2001-11-16 | 2006-01-11 | Posco公司 | 在焊接热影响区具有优良韧性的钢板及其制造方法和使用该钢板的焊接结构 |
| JP4529872B2 (ja) | 2005-11-04 | 2010-08-25 | 住友金属工業株式会社 | 高Ｍｎ鋼材及びその製造方法 |
| KR20120097160A (ko) * | 2011-02-24 | 2012-09-03 | 현대제철 주식회사 | 고장력 강판 및 그 제조 방법 |
| KR101461736B1 (ko) * | 2012-12-21 | 2014-11-14 | 주식회사 포스코 | 피삭성 및 용접 열영향부 극저온 인성이 우수한 오스테나이트계 강재 및 그의 제조방법 |
| CN104220617B (zh) * | 2011-12-27 | 2016-10-26 | Posco公司 | 具有优异的机械加工性并且在焊接热影响区域具有低温韧性的奥氏体钢，及其制造方法 |
| KR101353843B1 (ko) * | 2011-12-27 | 2014-01-20 | 주식회사 포스코 | 용접 열영향부 극저온 인성이 우수한 오스테나이트 강재 |
| CN104204262B (zh) * | 2011-12-28 | 2018-02-02 | Posco公司 | 具有优异的机械加工性及延展性的耐磨奥氏体钢及其生产方法 |
| KR101412259B1 (ko) * | 2012-03-29 | 2014-07-02 | 현대제철 주식회사 | 강판 및 그 제조 방법 |
| KR101412327B1 (ko) * | 2012-06-28 | 2014-06-25 | 현대제철 주식회사 | 각관용 열연강판 및 그 제조 방법 |
| US10041156B2 (en) * | 2012-12-26 | 2018-08-07 | Posco | High strength austenitic-based steel with remarkable toughness of welding heat-affected zone and preparation method therefor |
-
2014
- 2014-12-24 KR KR1020140189137A patent/KR101665821B1/ko active IP Right Grant
-
2015
- 2015-12-11 WO PCT/KR2015/013554 patent/WO2016105002A1/ko active Application Filing
- 2015-12-11 CA CA2970151A patent/CA2970151C/en active Active
- 2015-12-11 US US15/535,595 patent/US20170362675A1/en not_active Abandoned
- 2015-12-11 JP JP2017531487A patent/JP6810691B2/ja active Active
- 2015-12-11 CN CN201580070966.5A patent/CN107109602B/zh active Active
- 2015-12-11 EP EP15873529.0A patent/EP3239328B1/en active Active
-
2019
- 2019-08-02 JP JP2019142931A patent/JP6764510B2/ja active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US20170362675A1 (en) | 2017-12-21 |
| KR20160078853A (ko) | 2016-07-05 |
| JP2018503742A (ja) | 2018-02-08 |
| JP6764510B2 (ja) | 2020-09-30 |
| WO2016105002A8 (ko) | 2016-12-15 |
| CN107109602B (zh) | 2022-02-25 |
| KR101665821B1 (ko) | 2016-10-13 |
| JP2020002465A (ja) | 2020-01-09 |
| JP6810691B2 (ja) | 2021-01-06 |
| CN107109602A (zh) | 2017-08-29 |
| EP3239328A1 (en) | 2017-11-01 |
| EP3239328A4 (en) | 2017-12-13 |
| CA2970151A1 (en) | 2016-06-30 |
| WO2016105002A1 (ko) | 2016-06-30 |
| EP3239328B1 (en) | 2021-11-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2970151C (en) | Steel sheet for low-temperature service having excellent surface processing quality and method for manufacturing same | |
| JP6615773B2 (ja) | 表面加工品質に優れた低温用鋼 | |
| TW201202441A (en) | High-tensile, hot-rolled steel sheet with improved workability, and method of manufacturing the same | |
| JP6475836B2 (ja) | 脆性亀裂伝播抵抗性に優れた高強度鋼材及びその製造方法 | |
| KR101647227B1 (ko) | 표면 가공 품질이 우수한 저온용 강판 및 그 제조 방법 | |
| KR20200086737A (ko) | 열연 강판 및 그의 제조 방법 | |
| JP2013014812A (ja) | 歪付与後のｃｔｏｄ特性に優れた極低温用鋼材およびその製造方法 | |
| CA3047937A1 (en) | Steel material for welded steel pipe, having excellent longitudinal uniform elongation, manufacturing method therefor, and steel pipe using same | |
| JP2008261023A (ja) | 延性及び加工性に優れた高強度低比重鋼板及びその製造方法 | |
| JP2020509175A (ja) | 強度及び軟性に優れた低合金鋼板 | |
| JP7022822B2 (ja) | 低温変形時効衝撃特性に優れた厚鋼板及びその製造方法 | |
| JP2010270377A (ja) | 延性、加工性及び靭性に優れた高強度低比重鋼板及びその製造方法 | |
| JP4697844B2 (ja) | 微細組織を有する鋼材の製造方法 | |
| KR101299361B1 (ko) | 강재 및 이를 이용한 강관 제조 방법 | |
| JPH1171615A (ja) | 低温靱性に優れた厚鋼板の製造方法 | |
| KR101543915B1 (ko) | 항복강도가 우수한 오스테나이트계 저온용 강판 및 그 제조 방법 | |
| KR20150014733A (ko) | 극후 강판 및 그 제조 방법 | |
| JP7421632B2 (ja) | 低温靭性及びｃｔｏｄ特性に優れた薄物鋼材及びその製造方法 | |
| JP2000144309A (ja) | 耐食性に優れた構造用鋼及びその製造方法 | |
| JP2020509206A (ja) | 低温衝撃靭性及びｃｔｏｄ特性に優れた厚鋼板及びその製造方法 | |
| KR101069995B1 (ko) | 고강도 라인파이프용 강판 및 그 제조방법 | |
| KR20110130972A (ko) | 저온 ｄｗｔｔ 특성이 우수한 고강도 라인파이프강 및 그 제조 방법 | |
| KR101928215B1 (ko) | 강재 및 그 제조방법 | |
| KR101543917B1 (ko) | 표면 가공 품질이 우수한 저온용 강판 및 그 제조 방법 | |
| KR101455464B1 (ko) | 극후 강판 및 그 제조 방법 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20170607 |