EP0861916A1 - Procédé de fabrication d'un feuillard en acier inoxydable ferritique à haute teneur en aluminium utilisable notamment pour un support de catalyseur d'échappement de véhicule automobile - Google Patents

Procédé de fabrication d'un feuillard en acier inoxydable ferritique à haute teneur en aluminium utilisable notamment pour un support de catalyseur d'échappement de véhicule automobile Download PDF

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Publication number
EP0861916A1
EP0861916A1 EP98400334A EP98400334A EP0861916A1 EP 0861916 A1 EP0861916 A1 EP 0861916A1 EP 98400334 A EP98400334 A EP 98400334A EP 98400334 A EP98400334 A EP 98400334A EP 0861916 A1 EP0861916 A1 EP 0861916A1
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EP
European Patent Office
Prior art keywords
strip
aluminum
steel
composition
stainless steel
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.)
Withdrawn
Application number
EP98400334A
Other languages
German (de)
English (en)
French (fr)
Inventor
Hervé Sassoulas
Frédéric Moser
Jean-Marc Herbelin
Jean-Michel Hauser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
USINOR SA
Original Assignee
USINOR SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by USINOR SA filed Critical USINOR SA
Publication of EP0861916A1 publication Critical patent/EP0861916A1/fr
Withdrawn legal-status Critical Current

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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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B3/02—Rolling special iron alloys, e.g. stainless steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B47/00—Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal
    • 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
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0257—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment with diffusion of elements, e.g. decarburising, nitriding
    • 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
    • C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/04—Thickness, gauge

Definitions

  • the invention relates to a method of manufacturing a strip of high aluminum ferritic stainless steel usable in particular for a vehicle exhaust catalyst support automobile.
  • the alloy must form alumina upon oxidation in the temperature range between 700 ° C and 1200 ° C.
  • the strip must contain enough aluminum to form alumina during the entire period of hot use of the support catalyst.
  • An aluminum co-laminating process is also known. with a stainless steel sheet in which a cold plate is strip of stainless steel between two sheets of aluminum, laminate the laminate obtained, then the laminate is annealed so as to cause a diffusion of aluminum in the steel strip.
  • the object of the invention is to propose a manufacturing process a ferritic stainless steel strip with high aluminum content usable in particular for an exhaust catalyst support of motor vehicle by ensuring that the strip has an aluminum content high and a surface condition favorable to its use in a line catalytic type exhaust.
  • the invention also relates to a ferritic stainless strip with a high aluminum content usable especially for a support of motor vehicle exhaust catalyst obtained by the process, characterized in that it comprises in its composition of 4.5% to 10% aluminum and has a roughness surface condition less than 0.25 ⁇ m and preferably less than 0.1 ⁇ m.
  • the invention also relates to a stainless steel tape.
  • ferritic with high aluminum content usable in particular in the field of electrical resistances obtained by the process, characterized in that it has a resistivity greater than 1.4 ⁇ .m.
  • Figure 1 is a photograph showing the formation of aluminum nitrides at the steel-aluminum interface of the laminate when steel does not contain a determined proportion in its composition aluminum.
  • Figure 2 shows an elongation characteristic in service under thermal stresses as a function of the use time at hot of a strip A according to the invention and of a strip B of the 20% type Cr-5% Al of a steel produced in a steelworks.
  • Figure 3 shows the evolution of the aluminum content at during hot use in a strip A according to the invention and a strip B of the 20% Cr-5% Al type from a steel produced in a steelworks.
  • Figure 4 shows an elongation characteristic of a strip according to the invention and an elongation characteristic of the rough strip which has not undergone rolling after annealing diffusion.
  • Stainless steel sheet used for aluminum plating is made of stainless steel which does not contain elements of the titanium type, niobium zirconium.
  • the base sheet strip has a chromium content of less than 23% and a quantity aluminum between 0.1% and 3% and preferably a content in chromium between 15% and 19%.
  • the transformation of the sheet metal strip is greatly improved, compared to the transformation of a steel sheet containing about 20% chromium or more.
  • the transformation of a sheet metal strip containing no titanium or zirconium stabilizers or niobium and a chromium content greater than about 19% is made difficult by the brittleness due to chromium carbonitrides in strip steel.
  • the aluminum content of the strip obtained is between 4.5% and 10%, which corresponds to an aluminum concentration of the strip of sheet metal greater than that which can be obtained by the process direct production by casting in a steelworks.
  • alloying elements such as for example molybdenum
  • MoO 3 type volatile at temperatures of the order of 1000 ° C., which harms the cohesion of the layer of oxide on the surface of the strip.
  • the molybdenum content contained in the composition of the steel is deliberately limited to less than 0.5%.
  • the presence of at least 0.1% aluminum in the composition of the steel allows to introduce into the liquid metal rare earths in metallic form without forming rare earth oxides excessively.
  • the nitrogen of the steel is fixed by the aluminum of said steel so homogeneous in the form of fine precipitates and the diffusion of nitrogen towards interfaces are annihilated.
  • the aluminum and nitrogen contents of the steel of the sheet metal strip satisfy the following relationship % Al> 2 x (% N) + 0.30.
  • the controlled hydrogen atmosphere of the diffusion furnace is necessary because the presence of nitrogen causes the formation of nitrides aluminum in the strip which affect the characteristics mechanical of said strip.
  • the hydrogen atmosphere with a point dew below -30 ° C promotes the production of a non-oxidized metal and makes it possible to laminate the strip.
  • Diffusion annealing which is necessarily static, is carried out under bell because the temperature holding time must be sufficient long. This induces in particular slow cooling in the part internal of the strip coils and therefore embrittlement at 475 ° C of said strip.
  • the roughness Ra of the strip is increased to a value on the order of a micrometer.
  • the strip undergoes a final rolling ensuring a final roughness Ra of less than 0.25 ⁇ m and preferably less than or equal to 0.1 ⁇ m, the finishing rolling being followed by preferably a continuous final annealing.
  • the smooth surface condition favorable to the pot use properties catalytic, is obtained by cold rolling of the strip after annealing diffusion, the reduction rate of cold rolling being greater than 20% using for the last two rolling passes polished rolling mill rolls.
  • Final annealing carried out between 700 ° C and 1200 ° C and preferably between 800 ° C and 1000 ° C is a continuous annealing followed by a rapid cooling with a cooling rate greater than 25 ° C per second. This annealing eliminates the brittleness of the metal created during diffusion annealing.
  • the strip is then laminated to a final thickness of 50 ⁇ m under a reduction rate of 75% with a surface finish whose roughness has a final Ra of 0.08 ⁇ m. Rolling is then monitored continuous final annealing on parade at 950 ° C for 40 seconds under a hydrogen atmosphere.
  • the different process operations described allow obtaining the strip tested in temperature and whose the elongation is shown in Figure 2.
  • the strip according to the invention has a characteristic elongation under thermal stress in service depending on the hot use time, presented by curve A in FIG. 2, particularly improved compared to a feature elongation of a reference strip of the 20% Cr-5% Al type of a steel produced in steelworks and presented by curve B.
  • Figure 3 shows the evolution of the aluminum content at during hot use in the composition of a strip A according to the invention and in the composition of a reference strip B of the type 20% Cr-5% Al of a steel produced in a steelworks.
  • Figure 4 shows an elongation characteristic of a strip according to the invention and an elongation characteristic of the strip which has not undergone rolling after diffusion annealing.

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  • 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 Sheet Steel (AREA)
  • Catalysts (AREA)
  • Heat Treatment Of Steel (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
EP98400334A 1997-02-28 1998-02-13 Procédé de fabrication d'un feuillard en acier inoxydable ferritique à haute teneur en aluminium utilisable notamment pour un support de catalyseur d'échappement de véhicule automobile Withdrawn EP0861916A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9702396 1997-02-28
FR9702396A FR2760244B1 (fr) 1997-02-28 1997-02-28 Procede de fabrication d'un feuillard en acier inoxydable ferritique a haute teneur en aluminium utilisable notamment pour un support de catalyseur d'echappement de vehicule automobile

Publications (1)

Publication Number Publication Date
EP0861916A1 true EP0861916A1 (fr) 1998-09-02

Family

ID=9504281

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98400334A Withdrawn EP0861916A1 (fr) 1997-02-28 1998-02-13 Procédé de fabrication d'un feuillard en acier inoxydable ferritique à haute teneur en aluminium utilisable notamment pour un support de catalyseur d'échappement de véhicule automobile

Country Status (13)

Country Link
US (1) US6086689A (ja)
EP (1) EP0861916A1 (ja)
JP (1) JPH10251750A (ja)
KR (1) KR19980071835A (ja)
CN (1) CN1213587A (ja)
AU (1) AU5466398A (ja)
BR (1) BR9800790A (ja)
CA (1) CA2230016A1 (ja)
FR (1) FR2760244B1 (ja)
ID (1) ID19972A (ja)
MX (1) MX9801598A (ja)
TW (1) TW470780B (ja)
ZA (1) ZA981598B (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000074849A1 (de) * 1999-06-02 2000-12-14 Emitec Gesellschaft Für Emissionstechnologie Mbh Katalysator-trägerkörper fur zweirad- oder dieselanwendungen
DE19942234C1 (de) * 1999-09-03 2001-03-01 Krupp Vdm Gmbh Verfahren zur Herstellung von Mehrphasen-Verbundwerkstoffen sowie Verwendung des Verbundwerkstoffes
WO2001054899A1 (de) * 2000-01-25 2001-08-02 Krupp Vdm Gmbh Verwendung einer formstabilen eisen-chrom-aluminium-folie
FR2806940A1 (fr) * 2000-03-29 2001-10-05 Usinor Feuillard en acier inoxydable ferritique contenant de l'aluminium, utilisable notamment pour un support de catalyseur d'echappement de vehicule automobile et procede de fabrication dudit feuillard

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DE10025108A1 (de) * 2000-05-20 2001-11-29 Forschungszentrum Juelich Gmbh Hochtemperaturwerkstoff
DE60224249T3 (de) * 2001-09-27 2012-10-18 Hitachi Metals, Ltd. Stahl für Festoxid-Brennstoffzellenseparatoren
US6641780B2 (en) * 2001-11-30 2003-11-04 Ati Properties Inc. Ferritic stainless steel having high temperature creep resistance
AU2003256251A1 (en) * 2002-04-24 2003-11-10 The Regents Of The University Of California Planar electrochemical device assembly
US8158057B2 (en) * 2005-06-15 2012-04-17 Ati Properties, Inc. Interconnects for solid oxide fuel cells and ferritic stainless steels adapted for use with solid oxide fuel cells
US7842434B2 (en) * 2005-06-15 2010-11-30 Ati Properties, Inc. Interconnects for solid oxide fuel cells and ferritic stainless steels adapted for use with solid oxide fuel cells
US7981561B2 (en) * 2005-06-15 2011-07-19 Ati Properties, Inc. Interconnects for solid oxide fuel cells and ferritic stainless steels adapted for use with solid oxide fuel cells
US20040247494A1 (en) * 2003-03-24 2004-12-09 Engineered Materials Solutions, Inc. In-situ diffusion alloying and pre-oxidation annealing in air of FeCrAI alloy catalytic converter material
SE527742C2 (sv) * 2004-02-23 2006-05-30 Sandvik Intellectual Property Ferritiskt stål för högtemperaturtillämpningar, sätt att framställa detta, produkt och användning av stålet
JP5062985B2 (ja) * 2004-10-21 2012-10-31 新日鉄マテリアルズ株式会社 加工性に優れた高Ａｌ含有鋼板及びその製造方法
FR2883007B1 (fr) * 2005-03-11 2007-04-20 Usinor Sa Procede de fabrication d'une piece d'acier revetu presentant une tres haute resistance apres traitement thermique
CA2860746C (en) * 2012-01-30 2017-12-19 Jfe Steel Corporation Ferritic stainless steel foil
UA111115C2 (uk) 2012-04-02 2016-03-25 Ейкей Стіл Пропертіс, Інк. Рентабельна феритна нержавіюча сталь
CN103857818B (zh) * 2012-04-19 2016-03-23 新日铁住金株式会社 钢箔及其制造方法
CN103122439B (zh) * 2013-02-18 2014-10-08 无锡鑫常钢管有限责任公司 一种高参数超超临界火电机组用不锈钢管及其制造工艺
EP2987888B1 (en) * 2013-07-30 2018-02-28 JFE Steel Corporation Ferritic stainless steel foil
KR101994559B1 (ko) * 2014-08-29 2019-06-28 제이에프이 스틸 가부시키가이샤 페라이트계 스테인리스박 및 그 제조 방법
CN105220074A (zh) * 2015-10-22 2016-01-06 山西太钢不锈钢股份有限公司 一种锅炉吊管托块用中铬铁素体耐热钢制作方法
CN105506510A (zh) * 2015-12-03 2016-04-20 浙江腾龙精线有限公司 一种不锈钢丝的生产工艺
CN109844157B (zh) * 2016-10-17 2021-03-26 杰富意钢铁株式会社 不锈钢板和不锈钢箔
CN112475255B (zh) * 2020-11-18 2022-04-01 山西太钢不锈钢股份有限公司 一种高铝铁素体不锈钢连铸生产方法
CN112593151A (zh) * 2020-11-26 2021-04-02 衡阳鸿常机化有限公司 一种耐腐蚀无缝钢管及其制备工艺

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EP0201910A1 (en) * 1985-05-14 1986-11-20 Inland Steel Company Diffusion alloy steel foil
JPH02192801A (ja) * 1989-01-20 1990-07-30 Nippon Kinzoku Kogyo Kk 高アルミ含有フェライト系ステンレス鋼の製造方法
EP0392203A1 (de) * 1989-04-08 1990-10-17 Vacuumschmelze GmbH Duktiles Halbzeug auf Eisen-Chrom-Aluminium-Basis zur Verwendung als Trägermaterial für Katalysatoren
JPH07185839A (ja) * 1993-12-28 1995-07-25 Nippon Yakin Kogyo Co Ltd 高Ａｌ含有フェライトステンレス鋼箔の製造方法
EP0668366A1 (en) * 1994-02-09 1995-08-23 Allegheny Ludlum Corporation Creep resistant iron-chromium-aluminum alloy and article thereof
JPH0820847A (ja) * 1994-07-06 1996-01-23 Nisshin Steel Co Ltd 高Ａｌ含有フェライト系ステンレス鋼の製造方法
JPH08193257A (ja) * 1995-01-17 1996-07-30 Nippon Steel Corp 高温雰囲気炉の内張り用金属板
JPH08277422A (ja) * 1995-04-05 1996-10-22 Nippon Steel Corp ローピング性に優れたフェライト系ステンレス鋼板の製造方法
EP0837151A1 (de) * 1996-10-15 1998-04-22 Krupp VDM GmbH Verfahren zur Herstellung einer Eisen-Chrom-Aluminium-Folie und ihre Verwendung

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US5366139A (en) * 1993-08-24 1994-11-22 Texas Instruments Incorporated Catalytic converters--metal foil material for use therein, and a method of making the material
US5980658A (en) * 1996-12-06 1999-11-09 Texas Instruments Incorporated Catalytic converters-metal foil material for use herein, and a method of making the material

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EP0201910A1 (en) * 1985-05-14 1986-11-20 Inland Steel Company Diffusion alloy steel foil
JPH02192801A (ja) * 1989-01-20 1990-07-30 Nippon Kinzoku Kogyo Kk 高アルミ含有フェライト系ステンレス鋼の製造方法
EP0392203A1 (de) * 1989-04-08 1990-10-17 Vacuumschmelze GmbH Duktiles Halbzeug auf Eisen-Chrom-Aluminium-Basis zur Verwendung als Trägermaterial für Katalysatoren
JPH07185839A (ja) * 1993-12-28 1995-07-25 Nippon Yakin Kogyo Co Ltd 高Ａｌ含有フェライトステンレス鋼箔の製造方法
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JPH0820847A (ja) * 1994-07-06 1996-01-23 Nisshin Steel Co Ltd 高Ａｌ含有フェライト系ステンレス鋼の製造方法
JPH08193257A (ja) * 1995-01-17 1996-07-30 Nippon Steel Corp 高温雰囲気炉の内張り用金属板
JPH08277422A (ja) * 1995-04-05 1996-10-22 Nippon Steel Corp ローピング性に優れたフェライト系ステンレス鋼板の製造方法
EP0837151A1 (de) * 1996-10-15 1998-04-22 Krupp VDM GmbH Verfahren zur Herstellung einer Eisen-Chrom-Aluminium-Folie und ihre Verwendung

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000074849A1 (de) * 1999-06-02 2000-12-14 Emitec Gesellschaft Für Emissionstechnologie Mbh Katalysator-trägerkörper fur zweirad- oder dieselanwendungen
US6770591B2 (en) 1999-06-02 2004-08-03 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Honeycomb body, in particular catalyst carrier body, for motorcycle or diesel applications
DE19942234C1 (de) * 1999-09-03 2001-03-01 Krupp Vdm Gmbh Verfahren zur Herstellung von Mehrphasen-Verbundwerkstoffen sowie Verwendung des Verbundwerkstoffes
WO2001054899A1 (de) * 2000-01-25 2001-08-02 Krupp Vdm Gmbh Verwendung einer formstabilen eisen-chrom-aluminium-folie
FR2806940A1 (fr) * 2000-03-29 2001-10-05 Usinor Feuillard en acier inoxydable ferritique contenant de l'aluminium, utilisable notamment pour un support de catalyseur d'echappement de vehicule automobile et procede de fabrication dudit feuillard

Also Published As

Publication number Publication date
ZA981598B (en) 1998-09-01
ID19972A (id) 1998-09-03
JPH10251750A (ja) 1998-09-22
CN1213587A (zh) 1999-04-14
TW470780B (en) 2002-01-01
US6086689A (en) 2000-07-11
CA2230016A1 (fr) 1998-08-28
KR19980071835A (ko) 1998-10-26
BR9800790A (pt) 1999-09-28
AU5466398A (en) 1998-09-03
FR2760244A1 (fr) 1998-09-04
MX9801598A (es) 1998-11-29
FR2760244B1 (fr) 1999-04-09

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