JP2019505672A - Pwht抵抗性に優れた低温圧力容器用鋼板及びその製造方法 - Google Patents
Pwht抵抗性に優れた低温圧力容器用鋼板及びその製造方法 Download PDFInfo
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- JP2019505672A JP2019505672A JP2018532673A JP2018532673A JP2019505672A JP 2019505672 A JP2019505672 A JP 2019505672A JP 2018532673 A JP2018532673 A JP 2018532673A JP 2018532673 A JP2018532673 A JP 2018532673A JP 2019505672 A JP2019505672 A JP 2019505672A
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- pwht
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 95
- 239000010959 steel Substances 0.000 title claims abstract description 95
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 229910001563 bainite Inorganic materials 0.000 claims abstract description 17
- 229910000734 martensite Inorganic materials 0.000 claims abstract description 16
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 15
- 238000005496 tempering Methods 0.000 claims description 14
- 238000005098 hot rolling Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 8
- 238000003303 reheating Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- 229910001566 austenite Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 229910000746 Structural steel Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 241000428199 Mustelinae Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000007704 transition Effects 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
- 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
- C21D8/0247—Modifying the physical properties 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 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
-
- 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
- C21D6/001—Heat treatment of ferrous alloys containing 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
- 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
- C21D8/02—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
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
-
- 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
- C22C38/04—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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- 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
- 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
- C21D2211/002—Bainite
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials 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 Articles (AREA)
Abstract
Description
Claims (10)
- 質量%で、C:0.07〜0.17%、Si:0.15〜0.40%、Mn:0.3〜0.7%、P:0.012%以下、S:0.015%以下、Ni:3.0〜4.0%、W:0.03〜0.25%、残部Fe及び不可避不純物からなり、鋼微細組織が25〜80面積%の焼戻しベイナイトと残部焼戻しマルテンサイトからなることを特徴とするPWHT抵抗性に優れた低温用圧力容器鋼板。
- 前記鋼板は、580〜640℃の区間で最大20時間のPWHTを行っても、引張強度を600MPa以上に維持することを特徴とする請求項1に記載のPWHT抵抗性に優れた低温用圧力容器鋼板。
- 前記鋼微細組織は、30〜70面積%の焼戻しベイナイトと残部焼戻しマルテンサイトからなるものであることを特徴とする請求項1に記載のPWHT抵抗性に優れた低温用圧力容器鋼板。
- 前記鋼板は、580〜640℃の区間で最大20時間のPWHTを行っても、−110℃でのシャルピー衝撃エネルギー値が200J以上であることを特徴とする請求項1に記載のPWHT抵抗性に優れた低温用圧力容器鋼板。
- 質量%で、C:0.07〜0.17%、Si:0.15〜0.40%、Mn:0.3〜0.7%、P:0.012%以下、S:0.015%以下、Ni:3.0〜4.0%、W:0.03〜0.25%、残部Fe及び不可避不純物からなる鋼スラブを1050〜1250℃で再加熱する工程と、
前記再加熱された鋼スラブを熱間圧延し、800℃以上の温度で圧延を終了して熱延鋼板を得る熱間圧延工程と、
前記熱間圧延された鋼板を800〜950℃で加熱した後、水冷する工程と、
前記水冷された鋼材を、550〜660℃で{1.5×t+(10〜30)}分間[ここで、tは鋼材の厚さ(mm)を意味する。]焼戻し処理を行う工程と、
を含むことを特徴とするPWHT抵抗性に優れた低温用圧力容器鋼板の製造方法。 - 前記焼戻し工程の後に、580〜640℃の区間で最大20時間のPWHTを行う工程をさらに含むことを特徴とする請求項5に記載のPWHT抵抗性に優れた低温用圧力容器鋼板の製造方法。
- 前記焼戻し工程で得られた鋼微細組織は、25〜80面積%の焼戻しベイナイトと残部焼戻しマルテンサイトからなるものであることを特徴とする請求項5に記載のPWHT抵抗性に優れた低温用圧力容器鋼板の製造方法。
- 前記焼戻し工程で得られた鋼微細組織は、30〜70面積%の焼戻しベイナイトと残部焼戻しマルテンサイトからなるものであることを特徴とする請求項5に記載のPWHT抵抗性に優れた低温用圧力容器鋼板の製造方法。
- 前記熱間圧延工程においてパス当たりの圧下率は、5〜30%であることを特徴とする請求項5に記載のPWHT抵抗性に優れた低温用圧力容器鋼板の製造方法。
- 前記水冷工程において冷却速度は、2.5〜30℃/secであることを特徴とする請求項5に記載のPWHT抵抗性に優れた低温用圧力容器鋼板の製造方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2015-0183528 | 2015-12-22 | ||
KR1020150183528A KR101758497B1 (ko) | 2015-12-22 | 2015-12-22 | Pwht 저항성이 우수한 저온 압력용기용 강판 및 그 제조 방법 |
PCT/KR2016/012566 WO2017111290A1 (ko) | 2015-12-22 | 2016-11-03 | Pwht 저항성이 우수한 저온 압력용기용 강판 및 그 제조 방법 |
Publications (2)
Publication Number | Publication Date |
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JP2019505672A true JP2019505672A (ja) | 2019-02-28 |
JP6700400B2 JP6700400B2 (ja) | 2020-05-27 |
Family
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Family Applications (1)
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JP2018532673A Active JP6700400B2 (ja) | 2015-12-22 | 2016-11-03 | Pwht抵抗性に優れた低温圧力容器用鋼板及びその製造方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20180371568A1 (ja) |
EP (1) | EP3395984B1 (ja) |
JP (1) | JP6700400B2 (ja) |
KR (1) | KR101758497B1 (ja) |
CN (1) | CN108431272B (ja) |
WO (1) | WO2017111290A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2022505860A (ja) * | 2018-10-26 | 2022-01-14 | ポスコ | 極低温靭性及び延性に優れた圧力容器用鋼板及びその製造方法 |
CN115341152A (zh) * | 2022-08-31 | 2022-11-15 | 鞍钢股份有限公司 | 一种节镍型-100℃低温钢及其制造方法 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101998991B1 (ko) * | 2017-12-15 | 2019-07-10 | 주식회사 포스코 | 인장강도 및 저온충격인성이 우수한 압력용기용 강판 및 그 제조방법 |
KR102031499B1 (ko) * | 2018-08-07 | 2019-10-11 | 주식회사 포스코 | 표면품질 및 충격인성이 우수한 압력용기용 강재 및 이의 제조방법 |
KR102200225B1 (ko) * | 2019-09-03 | 2021-01-07 | 주식회사 포스코 | 극저온 횡팽창이 우수한 압력용기용 강판 및 그 제조 방법 |
KR102280641B1 (ko) * | 2019-10-22 | 2021-07-22 | 주식회사 포스코 | 고온 용접후열처리 저항성이 우수한 압력용기용 강판 및 그 제조방법 |
CN112626417A (zh) * | 2020-12-14 | 2021-04-09 | 南阳汉冶特钢有限公司 | 一种低成本690MPa级低温抗震钢的生产方法 |
CN113088807A (zh) * | 2021-02-25 | 2021-07-09 | 舞阳钢铁有限责任公司 | 一种高韧性低温压力容器用钢板及其生产方法 |
CN113549815B (zh) * | 2021-06-25 | 2022-09-16 | 鞍钢股份有限公司 | 一种低温用低合金压力容器用钢板及生产方法 |
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JP2015124435A (ja) * | 2013-12-27 | 2015-07-06 | Jfeスチール株式会社 | 脆性亀裂伝播停止特性に優れる原子炉格納容器用厚鋼板 |
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-
2015
- 2015-12-22 KR KR1020150183528A patent/KR101758497B1/ko active IP Right Grant
-
2016
- 2016-11-03 EP EP16879157.2A patent/EP3395984B1/en active Active
- 2016-11-03 JP JP2018532673A patent/JP6700400B2/ja active Active
- 2016-11-03 CN CN201680075744.7A patent/CN108431272B/zh active Active
- 2016-11-03 WO PCT/KR2016/012566 patent/WO2017111290A1/ko active Application Filing
- 2016-11-03 US US16/063,990 patent/US20180371568A1/en not_active Abandoned
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WO1995004838A1 (fr) * | 1993-08-04 | 1995-02-16 | Nippon Steel Corporation | Acier a resistance a la traction elevee, a resistance a la fatigue et a aptitude au soudage superieures et procede de fabrication |
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JP2008542531A (ja) * | 2005-05-26 | 2008-11-27 | アンドウステイール・フランス | 改善された溶接性を有する潜水艦船体用鋼 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2022505860A (ja) * | 2018-10-26 | 2022-01-14 | ポスコ | 極低温靭性及び延性に優れた圧力容器用鋼板及びその製造方法 |
JP7183410B2 (ja) | 2018-10-26 | 2022-12-05 | ポスコ | 極低温靭性及び延性に優れた圧力容器用鋼板及びその製造方法 |
CN115341152A (zh) * | 2022-08-31 | 2022-11-15 | 鞍钢股份有限公司 | 一种节镍型-100℃低温钢及其制造方法 |
Also Published As
Publication number | Publication date |
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WO2017111290A8 (ko) | 2017-12-21 |
EP3395984B1 (en) | 2020-01-29 |
EP3395984A4 (en) | 2018-12-26 |
CN108431272A (zh) | 2018-08-21 |
KR20170075050A (ko) | 2017-07-03 |
EP3395984A1 (en) | 2018-10-31 |
JP6700400B2 (ja) | 2020-05-27 |
WO2017111290A1 (ko) | 2017-06-29 |
US20180371568A1 (en) | 2018-12-27 |
KR101758497B1 (ko) | 2017-07-27 |
CN108431272B (zh) | 2020-07-28 |
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