JP5668081B2 - 延性に優れたオーステナイト鋼材 - Google Patents
延性に優れたオーステナイト鋼材 Download PDFInfo
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- JP5668081B2 JP5668081B2 JP2012547009A JP2012547009A JP5668081B2 JP 5668081 B2 JP5668081 B2 JP 5668081B2 JP 2012547009 A JP2012547009 A JP 2012547009A JP 2012547009 A JP2012547009 A JP 2012547009A JP 5668081 B2 JP5668081 B2 JP 5668081B2
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- steel material
- austenite
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- 229910000831 Steel Inorganic materials 0.000 title claims description 64
- 239000010959 steel Substances 0.000 title claims description 64
- 239000011572 manganese Substances 0.000 claims description 53
- 239000000463 material Substances 0.000 claims description 52
- 229910001566 austenite Inorganic materials 0.000 claims description 41
- 229910052799 carbon Inorganic materials 0.000 claims description 27
- 229910052748 manganese Inorganic materials 0.000 claims description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 26
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- 239000011651 chromium Substances 0.000 claims description 19
- 239000010949 copper Substances 0.000 claims description 19
- 239000010936 titanium Substances 0.000 claims description 11
- 239000010955 niobium Substances 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 230000035699 permeability Effects 0.000 claims description 9
- 229910052804 chromium Inorganic materials 0.000 claims description 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 229910052719 titanium Inorganic materials 0.000 claims description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 229910052758 niobium Inorganic materials 0.000 claims description 6
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 description 19
- 238000005260 corrosion Methods 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 11
- 230000005291 magnetic effect Effects 0.000 description 11
- 229910000734 martensite Inorganic materials 0.000 description 11
- 230000000704 physical effect Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- 150000001247 metal acetylides Chemical class 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 7
- 238000001816 cooling Methods 0.000 description 7
- 230000001965 increasing effect Effects 0.000 description 7
- 229910000617 Mangalloy Inorganic materials 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 230000005294 ferromagnetic effect Effects 0.000 description 4
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 4
- 239000006104 solid solution Substances 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- 239000010962 carbon steel Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000004580 weight loss Effects 0.000 description 3
- 239000013585 weight reducing agent Substances 0.000 description 3
- 239000008186 active pharmaceutical agent Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 229910003470 tongbaite Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- 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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing 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
- C22C38/20—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
Description
Mnは、本発明のような高マンガン鋼に添加される最も重要な元素で、オーステナイトを安定化させる役割をする元素である。本発明で非磁性特性を向上させるために制御される炭素の含量を考慮すると、オーステナイトを安定化させるためにマンガンが8%以上含まれることが好ましい。即ち、Mnの含量が8%未満の場合は、強磁性相であるフェライトが主組織となるため、オーステナイト組織を十分に確保することができない。また、Mnの含量が15%を超える場合は、不安定なイプシロンマルテンサイトが形成されて変形によって容易にフェライトに変態するため、安定したオーステナイト組織を維持することができず、これにより、磁性が増加及び疲労特性が劣化し、また、過度なマンガンの添加による耐食性の低下、製造工程上の困難、製造単価の上昇などの問題点が生じる。
Cは、オーステナイトを安定化させて常温でオーステナイト組織が得られるようにする元素で、鋼材の強度及び耐摩耗性を増加させる効果があり、特に、冷却過程又は加工によるオーステナイトからマルテンサイトへの変態点であるMs及びMdを低くする役割をする。
Cuは、炭化物内の固溶度が低すぎてオーステナイト内の拡散が遅いため、オーステナイトと核生成された炭化物の界面に濃縮され、これにより、炭素の拡散を妨害して炭化物の成長を効果的に遅らせるため、炭化物の生成を抑制する効果がある。但し、Cuの含量が3%を超える場合は、鋼材の熱間加工性を低下させるという問題点があるため、上限は3%に制限することが好ましい。特に、上記炭化物生成抑制効果を十分に得るためには0.3重量%以上添加されることが好ましく、より好ましくは2%以上添加されることが上記効果を極大化するのに効果的である。
一般的にマンガンは鋼材の耐食性を低下させる元素であり、上記範囲のマンガンの含量では一般炭素鋼に比べて耐食性が低下するという短所があるが、本発明ではCrを添加することにより耐食性を向上させている。また、上記範囲のクロム添加によってオーステナイトを安定化させて延性を増加させることができ、固溶強化によって強度も向上させることができる。
チタニウムは、窒素と結合してTiNを形成することにより、高温でオーステナイト結晶粒の成長を抑制して鋼材の降伏強度を増加させる効果を示す。しかしながら、過度に添加される場合は、チタニウム析出物が粗大化して鋼材の物性を劣化させるという問題があるため、その上限を0.05%に限定することが好ましい。
ニオビウムは、固溶、析出硬化効果によって強度を増加させる元素であり、特に、鋼の再結晶停止温度(Tnr)を増加させて低温圧延時に結晶粒の微細化によって降伏強度を向上させることができるが、0.1%を超えて添加される場合は粗大な析出物が生成されて却って鋼材の物性を劣化させるため、その含量の上限は0.1%に限定することが好ましい。
窒素は、炭素と共にオーステナイトを安定化させる元素であり、また、固溶強化によって鋼材の強度を向上させることができる。不安定なオーステナイトが生成される場合は、変形によってイプシロン(ε)マルテンサイト及びアルファマルテンサイトへの加工誘起変態を誘発して物性及び非磁性特性を大きく減少させるため、窒素の適正な添加によってオーステナイトを安定化させて鋼の物性と非磁性特性を向上させることができる。
Claims (5)
- 重量%で、マンガン(Mn):8〜15%、銅(Cu):0.3〜3%、クロム(Cr):8%以下(0%は除く)を含み、炭素(C)の含量は33.5C+Mn≧25及び33.5C−Mn≦23を満足し、残部Fe及びその他の不可避不純物からなる鋼材であって、その微細組織はオーステナイトが95面積%以上である、延性に優れたオーステナイト鋼材。
- 前記鋼材はチタニウム(Ti):0.05%以下(0%は除く)及びニオビウム(Nb):0.1%以下(0%は除く)をさらに含む、請求項1に記載の延性に優れたオーステナイト鋼材。
- 前記鋼材の降伏強度は500MPa以上である、請求項2に記載の延性に優れたオーステナイト鋼材。
- 前記鋼材は窒素(N):0.002〜0.2%をさらに含む、請求項2に記載の延性に優れたオーステナイト鋼材。
- 前記鋼材は20%の引張変形時に透磁率が1.01以下である、請求項1に記載の延性に優れたオーステナイト鋼材。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020090132105A KR101322170B1 (ko) | 2009-12-28 | 2009-12-28 | 연성이 우수한 강재 |
KR10-2009-0132105 | 2009-12-28 | ||
KR1020100133641A KR101253860B1 (ko) | 2010-12-23 | 2010-12-23 | 내식성 및 내마모성이 우수한 고연성 강재 |
KR10-2010-0133641 | 2010-12-23 | ||
PCT/KR2010/009393 WO2011081393A2 (ko) | 2009-12-28 | 2010-12-28 | 연성이 우수한 오스테나이트 강재 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2013515864A JP2013515864A (ja) | 2013-05-09 |
JP5668081B2 true JP5668081B2 (ja) | 2015-02-12 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2012547009A Active JP5668081B2 (ja) | 2009-12-28 | 2010-12-28 | 延性に優れたオーステナイト鋼材 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20120288396A1 (ja) |
EP (1) | EP2520684B9 (ja) |
JP (1) | JP5668081B2 (ja) |
CN (1) | CN102906294A (ja) |
CA (1) | CA2785318C (ja) |
WO (1) | WO2011081393A2 (ja) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6078554B2 (ja) | 2011-12-27 | 2017-02-08 | ポスコPosco | 被削性及び溶接熱影響部における極低温靱性に優れたオーステナイト系鋼材及びその製造方法 |
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 |
WO2013100612A1 (ko) | 2011-12-28 | 2013-07-04 | 주식회사 포스코 | 피삭성 및 용접 열영향부 인성이 우수한 내마모 오스테나이트계 강재 및 그의 제조방법 |
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 |
KR101490567B1 (ko) * | 2012-12-27 | 2015-02-05 | 주식회사 포스코 | 용접성이 우수한 고망간 내마모강 및 그 제조방법 |
US9634549B2 (en) * | 2013-10-31 | 2017-04-25 | General Electric Company | Dual phase magnetic material component and method of forming |
US10229777B2 (en) * | 2013-10-31 | 2019-03-12 | General Electric Company | Graded magnetic component and method of forming |
US10229776B2 (en) * | 2013-10-31 | 2019-03-12 | General Electric Company | Multi-phase magnetic component and method of forming |
KR101611697B1 (ko) * | 2014-06-17 | 2016-04-14 | 주식회사 포스코 | 확관성과 컬렙스 저항성이 우수한 고강도 확관용 강재 및 확관된 강관과 이들의 제조방법 |
KR101917473B1 (ko) | 2016-12-23 | 2018-11-09 | 주식회사 포스코 | 내마모성과 인성이 우수한 오스테나이트계 강재 및 그 제조방법 |
KR102020381B1 (ko) * | 2017-12-22 | 2019-09-10 | 주식회사 포스코 | 내마모성이 우수한 강재 및 그 제조방법 |
CN109023042A (zh) * | 2018-07-25 | 2018-12-18 | 包头钢铁(集团)有限责任公司 | 500MPa级抗震耐氯离子腐蚀钢筋及其制造方法 |
US11661646B2 (en) | 2021-04-21 | 2023-05-30 | General Electric Comapny | Dual phase magnetic material component and method of its formation |
US11926880B2 (en) | 2021-04-21 | 2024-03-12 | General Electric Company | Fabrication method for a component having magnetic and non-magnetic dual phases |
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Publication number | Priority date | Publication date | Assignee | Title |
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GB584669A (en) * | 1942-07-22 | 1947-01-21 | Electro Metallurg Co | Improvements in and relating to cold rolled alloy iron or alloy steel articles |
AT248481B (de) * | 1963-09-03 | 1966-07-25 | Boehler & Co Ag Geb | Unmagnetisierbare Manganstähle für Zwecke, bei welchen die Gefahr der Spannungsrißkorrosion bei Einwirkung von neutralen Salzlösungen, insbesondere Seewasser, besteht |
JPS5481119A (en) * | 1977-12-12 | 1979-06-28 | Sumitomo Metal Ind Ltd | Nonmagnetic steel excellent in machinability |
JPS6036647A (ja) * | 1983-08-06 | 1985-02-25 | Kawasaki Steel Corp | 局部腐食抵抗性に優れる高マンガン鋼 |
JPH02270937A (ja) * | 1985-10-18 | 1990-11-06 | Ube Ind Ltd | 高ころがり疲労特性を有する高マンガン鋼およびその製造方法 |
JPS6335758A (ja) * | 1986-07-30 | 1988-02-16 | Nippon Kokan Kk <Nkk> | 酸化物分散強化型高マンガンオ−ステナイト鋼 |
FI904500A (fi) * | 1990-09-12 | 1992-03-13 | Lokomo Oy | Slitstarket staol och foerfarande foer framstaellning av detta. |
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WO2006082104A1 (en) * | 2005-02-02 | 2006-08-10 | Corus Staal Bv | Austenitic steel having high strength and formability, method of producing said steel and use thereof |
JP2009256765A (ja) * | 2008-03-26 | 2009-11-05 | Minebea Co Ltd | 非磁性オーステナイト系ステンレス鋼、モータ用シャフトおよびモータ |
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2010
- 2010-12-28 EP EP10841225.5A patent/EP2520684B9/en active Active
- 2010-12-28 US US13/519,343 patent/US20120288396A1/en not_active Abandoned
- 2010-12-28 CA CA2785318A patent/CA2785318C/en active Active
- 2010-12-28 WO PCT/KR2010/009393 patent/WO2011081393A2/ko active Application Filing
- 2010-12-28 JP JP2012547009A patent/JP5668081B2/ja active Active
- 2010-12-28 CN CN2010800648461A patent/CN102906294A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2011081393A3 (ko) | 2011-11-10 |
CA2785318C (en) | 2014-06-10 |
JP2013515864A (ja) | 2013-05-09 |
CN102906294A (zh) | 2013-01-30 |
EP2520684B9 (en) | 2017-01-04 |
EP2520684B1 (en) | 2016-10-26 |
CA2785318A1 (en) | 2011-07-07 |
WO2011081393A2 (ko) | 2011-07-07 |
EP2520684A2 (en) | 2012-11-07 |
EP2520684A4 (en) | 2015-01-14 |
US20120288396A1 (en) | 2012-11-15 |
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