JP6910429B2 - カーボンスラッジの吸着が低減された排気系熱交換器用フェライト系ステンレス鋼及びその製造方法 - Google Patents
カーボンスラッジの吸着が低減された排気系熱交換器用フェライト系ステンレス鋼及びその製造方法 Download PDFInfo
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- 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
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- C—CHEMISTRY; METALLURGY
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- 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
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- C21D6/002—Heat treatment of ferrous alloys containing Cr
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- 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
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- 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
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- 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
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- 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
- C21D8/0236—Cold rolling
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
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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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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%
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/082—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys
- F28F21/083—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys from stainless steel
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- 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
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- 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
- C21D2211/005—Ferrite
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Heat Treatment Of Sheet Steel (AREA)
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Description
下記表1の組成を有する溶鋼を用意し、連続鋳造によってスラブを製造した。
すなわち、本発明の一実施例による冷却パターンを用いた発明鋼及び比較鋼によるスラブの製造時に、実施例1、2及び比較例4は、それぞれ、発明鋼1、2及び比較鋼1のスラブの表面温度が1530℃から1100℃に至るまで6℃/秒の速度で強冷し、以後、1150℃の温度で10分間復熱し、水冷(water quenching)により400℃まで急冷した。
Claims (3)
- 質量%で、C:0.005乃至0.1%、Si:0.01乃至2.0%、Mn:0.01乃至1.5%、P:0.05%以下、S:0.005%以下、Cr:10乃至30%、Ti:0.001乃至0.10%、Al:0.001乃至0.15%、N:0.003乃至0.03%、Nb:0.3乃至0.6%、Mo:0.01乃至2.5%、残部Fe及び不可避な不純物からなり、
表層部のフェライト基地内に0.1μm以上のサイズを有するTiN析出物が2.5×104ea/mm2以下で分布し、
前記表層部のフェライト基地内に0.1μm以上のサイズを有するTiN・NbC複合析出物が2.0×10 4 ea/mm 2 以下で分布し、
前記表層部のフェライト基地内に0.1μm以上のサイズを有するNbC析出物が8.5×10 5 ea/mm 2 以上で分布することを特徴とするカーボンスラッジの吸着が低減された排気系熱交換器用フェライト系ステンレス鋼。 - 前記析出物は、下記式(1)を満たすことを特徴とする請求項1に記載のカーボンスラッジの吸着が低減された排気系熱交換器用フェライト系ステンレス鋼。
{Z/(X+Y)}≧20−−−−−−式(1)
ここで、Xは、前記TiN析出物の単位面積当たりの個数(ea/mm2)であり、Yは、前記TiN・NbC複合析出物の単位面積当たりの個数(ea/mm2)であり、Zは、前記NbC析出物の単位面積当たりの個数(ea/mm2)である。 - 質量%で、C:0.005乃至0.1%、Si:0.01乃至2.0%、Mn:0.01乃至1.5%、P:0.05%以下、S:0.005%以下、Cr:10乃至30%、Ti:0.001乃至0.10%、Al:0.001乃至0.15%、N:0.003乃至0.03%、Nb:0.3乃至0.6%、Mo:0.01乃至2.5%、残部Fe及び不可避な不純物からなる溶鋼を利用してスラブの連続鋳造時に、前記スラブの表面の温度が1100℃に至るまで6℃/秒以上の平均冷却速度で冷却する段階と、
復熱して、1100乃至1200℃の温度で5乃至15分間維持する段階と、
400℃に到達するまで水冷する段階と、
を含み、
表層部のフェライト基地内に0.1μm以上のサイズを有するTiN析出物が2.5×10 4 ea/mm 2 以下で分布し、表層部のフェライト基地内に0.1μm以上のサイズを有するTiN・NbC複合析出物が2.0×10 4 ea/mm 2 以下で分布し、表層部のフェライト基地内に0.1μm以上のサイズを有するNbC析出物が8.5×10 5 ea/mm 2 以上で分布することを特徴とするカーボンスラッジの吸着が低減された排気系熱交換器用フェライト系ステンレス鋼の製造方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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KR10-2016-0124670 | 2016-09-28 | ||
KR1020160124670A KR101835021B1 (ko) | 2016-09-28 | 2016-09-28 | 카본 슬러지 흡착이 저감된 배기계 열교환기용 페라이트계 스테인리스강 및 이의 제조 방법 |
PCT/KR2016/013474 WO2018062617A1 (ko) | 2016-09-28 | 2016-11-22 | 카본 슬러지 흡착이 저감된 배기계 열교환기용 페라이트계 스테인리스강 및 이의 제조 방법 |
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JP2019534379A JP2019534379A (ja) | 2019-11-28 |
JP6910429B2 true JP6910429B2 (ja) | 2021-07-28 |
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US (1) | US11634801B2 (ja) |
EP (1) | EP3521471A4 (ja) |
JP (1) | JP6910429B2 (ja) |
KR (1) | KR101835021B1 (ja) |
CN (1) | CN109790605B (ja) |
WO (1) | WO2018062617A1 (ja) |
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CN112318947A (zh) * | 2020-11-11 | 2021-02-05 | 新昌县精锐机械有限公司 | 一种发动机排气管及其制备工艺 |
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JPH08144021A (ja) * | 1994-11-18 | 1996-06-04 | Sumitomo Metal Ind Ltd | フェライトステンレス鋼およびその冷延鋼板の製造方法 |
EP1219719B1 (en) | 2000-12-25 | 2004-09-29 | Nisshin Steel Co., Ltd. | A ferritic stainless steel sheet good of workability and a manufacturing method thereof |
DE60204323T2 (de) * | 2001-07-05 | 2006-01-26 | Nisshin Steel Co., Ltd. | Ferritischer nichtrostender stahl für ein element einer abgasstrompassage |
JP5390175B2 (ja) * | 2007-12-28 | 2014-01-15 | 新日鐵住金ステンレス株式会社 | ろう付け性に優れたフェライト系ステンレス鋼 |
JP5264199B2 (ja) | 2008-01-28 | 2013-08-14 | 日新製鋼株式会社 | フェライト系ステンレス鋼を用いたegrクーラー |
JP5682901B2 (ja) * | 2008-09-18 | 2015-03-11 | Jfeスチール株式会社 | スピニング加工性に優れるTi添加フェライト系ステンレス鋼板及びその製造方法 |
JP5462583B2 (ja) * | 2008-10-24 | 2014-04-02 | 新日鐵住金ステンレス株式会社 | Egrクーラ用フェライト系ステンレス鋼板 |
KR20100074691A (ko) * | 2008-12-24 | 2010-07-02 | 강태섭 | 다용도 발광 표시장치 |
JP5707671B2 (ja) * | 2009-03-31 | 2015-04-30 | Jfeスチール株式会社 | 加工性と製造性に優れたNb添加フェライト系ステンレス鋼板及びその製造方法 |
JP2011157616A (ja) * | 2010-02-03 | 2011-08-18 | Nisshin Steel Co Ltd | ろう付け用フェライト系ステンレス鋼 |
JP5610796B2 (ja) * | 2010-03-08 | 2014-10-22 | 新日鐵住金ステンレス株式会社 | 炭化水素燃焼排ガスから発生する凝縮水環境における耐食性に優れるフェライト系ステンレス鋼 |
US9611525B2 (en) | 2011-03-29 | 2017-04-04 | Nippon Steel & Sumikin Stainless Steel Corporation | Ferritic stainless steel for biofuel supply system part, biofuel supply system part, ferritic stainless steel for exhaust heat recovery unit, and exhaust heat recovery unit |
KR101623242B1 (ko) * | 2013-12-24 | 2016-05-20 | 주식회사 포스코 | 초내식성 듀플렉스 스테인리스강 및 그 제조방법 |
JP6159775B2 (ja) * | 2014-10-31 | 2017-07-05 | 新日鐵住金ステンレス株式会社 | 耐排ガス凝縮水腐食性とろう付け性に優れたフェライト系ステンレス鋼及びその製造方法 |
KR20160079967A (ko) | 2014-12-26 | 2016-07-07 | 주식회사 포스코 | 표면품질 및 내리징성이 우수한 페라이트계 스테인리스강 |
EP3239335B1 (en) * | 2014-12-26 | 2019-11-13 | Posco | Ferritic stainless steel having excellent ductility and method for manufacturing same |
JP6493440B2 (ja) * | 2016-09-15 | 2019-04-03 | Jfeスチール株式会社 | 熱交換器の熱交換部用フェライト系ステンレス鋼板 |
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2016
- 2016-09-28 KR KR1020160124670A patent/KR101835021B1/ko active IP Right Grant
- 2016-11-22 EP EP16917818.3A patent/EP3521471A4/en active Pending
- 2016-11-22 WO PCT/KR2016/013474 patent/WO2018062617A1/ko unknown
- 2016-11-22 US US16/337,629 patent/US11634801B2/en active Active
- 2016-11-22 JP JP2019515616A patent/JP6910429B2/ja active Active
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CN109790605B (zh) | 2021-10-29 |
JP2019534379A (ja) | 2019-11-28 |
EP3521471A1 (en) | 2019-08-07 |
KR101835021B1 (ko) | 2018-03-09 |
WO2018062617A1 (ko) | 2018-04-05 |
US20210147966A1 (en) | 2021-05-20 |
EP3521471A4 (en) | 2019-09-04 |
CN109790605A (zh) | 2019-05-21 |
US11634801B2 (en) | 2023-04-25 |
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