EP1352982A2 - Acier inoxydable, procédé de fabrication de pièces sans fissuration de tension et pièce obtenue - Google Patents

Acier inoxydable, procédé de fabrication de pièces sans fissuration de tension et pièce obtenue Download PDF

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Publication number
EP1352982A2
EP1352982A2 EP03008317A EP03008317A EP1352982A2 EP 1352982 A2 EP1352982 A2 EP 1352982A2 EP 03008317 A EP03008317 A EP 03008317A EP 03008317 A EP03008317 A EP 03008317A EP 1352982 A2 EP1352982 A2 EP 1352982A2
Authority
EP
European Patent Office
Prior art keywords
content
steel
cold
strip
ferrite
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.)
Granted
Application number
EP03008317A
Other languages
German (de)
English (en)
Other versions
EP1352982B1 (fr
EP1352982A3 (fr
Inventor
Gabriele Dr. Brückner
Hans-Joachim Dr. Rer. Nat. Krautschick
Wolfgang Dr. Rer. Nat. Schlump
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.)
Outokumpu Nirosta GmbH
Original Assignee
ThyssenKrupp Nirosta GmbH
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 ThyssenKrupp Nirosta GmbH filed Critical ThyssenKrupp Nirosta GmbH
Publication of EP1352982A2 publication Critical patent/EP1352982A2/fr
Publication of EP1352982A3 publication Critical patent/EP1352982A3/fr
Application granted granted Critical
Publication of EP1352982B1 publication Critical patent/EP1352982B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • 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
    • 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
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of 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
    • C22C38/18—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
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
    • C21D2211/005—Ferrite
    • 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
    • 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
    • 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
    • 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

Definitions

  • the invention relates to a stainless steel made of such steel by cold forming generated component and a method for producing stress-free molded parts.
  • Metastable or unstable austenitic stainless Steels are characterized by very good formability stretching stress.
  • the good Deformability of such stainless steels includes in this justifies that there is stretching deformation too deformation-induced martensite formation that Cause TRIP effect.
  • the object of the invention an inexpensive to produce stainless steel create, even with conventional cold forming insensitive to the development of stress cracks is, as well as a method for producing to specify stress-free, cold-formed components.
  • the starting point of the invention is the idea instead of usually for stainless steels of the generic type provided single-phase purely austenitic structure to go over a two-phase mixed structure, which consists of Austenite and ferrite is formed. It will Mixed structure by alloying Si and / or Mo and partly by lowering the Ni content or by Exchange of Ni by Cu discontinued. The austenite will stabilized so far that the formation of martensite at Deformation no longer leads to stress cracks.
  • the austenite is not stabilized, however Alloying expensive austenite formers, but by the Addition of ferrite formers such as Si, Mo, Al with formation of a two-phase structure. This structure leads to the fact that in the ⁇ phase the austenite formers are enriched and the Ferrite formers are depleted.
  • the ⁇ -ferrite content should not be higher than 40% to ensure good ductility of the steel guarantee.
  • This is achieved in one alloy according to the invention in that the contents Cr, Mo, Si, Al, Mn, Ni, Cu, C and N so on top of each other be voted that the factor t formed with them in Range is 1.3 to 1.8. In this way the required for high resistance to stress cracking Weighting of the austenite and ferrite components in the structure of the steel according to the invention unerringly achieved.
  • the M d30 temperature is the temperature at which 50% of the austenite to martensite conversion occurred after cold working of 30%. Above this temperature, on the other hand, there is a reduced conversion (see Material Science Steel, Volume 2, publisher: Association of German Ironworkers, 1985, Springer-Verlag Berlin Heidelberg New York Tokyo, Verlag Stahleisen mbH Düsseldorf, Chapter D 10.3.2). Accordingly, if the upper limit of the M d30 temperature prescribed by the invention is observed, it is ensured that the formation of martensite, which is unfavorable with regard to the development of stress cracks, is largely suppressed. This is set reliably by the two-phase structure of the steel sought according to the invention.
  • the two-phase structure leads from steel according to the invention to separate the Alloying elements.
  • Austenite formers such as Mn, Ni, Cu, C, N
  • ferrite formers such as Cr, Si and Mo
  • the storage the austenite in the ⁇ phase stabilizes the Austenite content beyond the basic analysis and reduced or suppresses the formation of martensite.
  • the figure shows a micrograph for a sample piece P. to represent the spatial distribution of the phases of a steel according to the invention, specifying the Sample coordinate system, in which the vertical aligned sheet metal normal BN perpendicular to that through the Cross direction Qr and the rolling direction Wr spanned Level stands.
  • the composition of the comparative steel V1 is below that Material number 1.4301 and that of the comparative steel V2 known under the material number 1.4376.
  • Table 1 the proportions of the ⁇ -ferrite in the structure and the respective strain-induced martensite portion recorded. Table 1 also shows whether it is at cold forming of steels E1 to E12 and V1 and V2 cracking occurred.
  • sample P shows the spatial distribution of austenitic and ferritic Structural components.
  • the cold strips obtained were used to form sheet blanks a diameter of 150 mm, from which then using a 75 mm diameter Stamp cups were deep drawn. It turned out that result from the steels E1 to E12 according to the invention Cold strips obtained can easily be molded into wells were cold formed while it was cold formed generated from the conventional comparative steels V1, V2 Cold strips on a large scale to create Tension cracks came.
  • Table 2 shows the M d30 temperatures calculated from the alloy contents for the steels E1, E2 and E3 according to the invention and for the comparative steels V1 and V2. It shows that stress cracks certainly do not occur if the M d30 temperature of the respective steel does not exceed -55 ° C.

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  • 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 Sheet Steel (AREA)
  • Heat Treatment Of Steel (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
EP03008317A 2002-04-10 2003-04-10 Acier inoxydable, procédé de fabrication de pièces sans fissuration de tension et pièce obtenue Expired - Lifetime EP1352982B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10215598 2002-04-10
DE10215598A DE10215598A1 (de) 2002-04-10 2002-04-10 Nichtrostender Stahl, Verfahren zum Herstellen von spannungsrißfreien Formteilen und Formteil

Publications (3)

Publication Number Publication Date
EP1352982A2 true EP1352982A2 (fr) 2003-10-15
EP1352982A3 EP1352982A3 (fr) 2004-01-07
EP1352982B1 EP1352982B1 (fr) 2005-10-05

Family

ID=28051225

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03008317A Expired - Lifetime EP1352982B1 (fr) 2002-04-10 2003-04-10 Acier inoxydable, procédé de fabrication de pièces sans fissuration de tension et pièce obtenue

Country Status (4)

Country Link
EP (1) EP1352982B1 (fr)
AT (1) ATE305986T1 (fr)
DE (2) DE10215598A1 (fr)
ES (1) ES2250773T3 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006125412A1 (fr) * 2005-05-23 2006-11-30 Scheller Piotr R Acier austenitique pour construction legere et son utilisation
US20070163679A1 (en) * 2004-01-29 2007-07-19 Jfe Steel Corporation Austenitic-ferritic stainless steel
WO2008099336A1 (fr) * 2007-02-12 2008-08-21 Thyssenkrupp Acciali Speciali Terni S.P.A. Acier inoxydable austénitique
EP2163659A1 (fr) * 2008-09-11 2010-03-17 ThyssenKrupp Nirosta GmbH Acier inoxidable, bande froide fabriquée à partir de cet acier et procédé de fabrication d'un produit plat en acier à partir de cet acier
WO2011135170A1 (fr) 2010-04-29 2011-11-03 Outokumpu Oyj Procédé de fabrication et d'utilisation d'acier inoxydable ferritique austénitique présentant une grande aptitude au formage
WO2011138503A1 (fr) 2010-05-06 2011-11-10 Outokumpu Oyj Acier inoxydable austénitique à faible teneur en nickel et ses utilisations
WO2012143610A1 (fr) 2011-04-18 2012-10-26 Outokumpu Oyj Procédé de fabrication et d'utilisation d'acier inoxydable ferritique-austénitique
WO2014135441A1 (fr) * 2013-03-04 2014-09-12 Outokumpu Nirosta Gmbh Procédé de production d'un matériau à très haute résistance présentant un allongement élevé
DE102015005742A1 (de) 2015-05-05 2016-11-10 Dbi Gas- Und Umwelttechnik Gmbh Verfahren zur Herstellung von Feinblech aus einem nichtrostenden, austenitischen CrMnNi-Stahl

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101460279B1 (ko) 2012-12-24 2014-11-11 주식회사 포스코 Ｃｒ－Ｍｎ계 스테인리스강

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2163511A1 (de) * 1971-12-21 1972-07-13 Armco Steel Corp Austenitisch-ferritischer rostfreier Stahl
US3861908A (en) * 1973-08-20 1975-01-21 Crucible Inc Duplex stainless steel
JPH05247594A (ja) * 1992-03-03 1993-09-24 Sumitomo Metal Ind Ltd 耐候性に優れた二相ステンレス鋼
US6096441A (en) * 1997-06-30 2000-08-01 Usinor Austenoferritic stainless steel having a very low nickel content and a high tensile elongation
WO2002027056A1 (fr) * 2000-09-27 2002-04-04 Avestapolarit Aktiebolag (Publ) Acier inoxydable ferritique austenitique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2045584A1 (fr) * 1969-06-03 1971-03-05 Ugine Kuhlmann
DE3825634C2 (de) * 1988-07-28 1994-06-30 Thyssen Stahl Ag Verfahren zur Erzeugung von Warmbad oder Grobblechen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2163511A1 (de) * 1971-12-21 1972-07-13 Armco Steel Corp Austenitisch-ferritischer rostfreier Stahl
US3861908A (en) * 1973-08-20 1975-01-21 Crucible Inc Duplex stainless steel
JPH05247594A (ja) * 1992-03-03 1993-09-24 Sumitomo Metal Ind Ltd 耐候性に優れた二相ステンレス鋼
US6096441A (en) * 1997-06-30 2000-08-01 Usinor Austenoferritic stainless steel having a very low nickel content and a high tensile elongation
WO2002027056A1 (fr) * 2000-09-27 2002-04-04 Avestapolarit Aktiebolag (Publ) Acier inoxydable ferritique austenitique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 004 (C-1149), 6. Januar 1994 (1994-01-06) -& JP 05 247594 A (SUMITOMO METAL IND LTD), 24. September 1993 (1993-09-24) *

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8562758B2 (en) * 2004-01-29 2013-10-22 Jfe Steel Corporation Austenitic-ferritic stainless steel
US20070163679A1 (en) * 2004-01-29 2007-07-19 Jfe Steel Corporation Austenitic-ferritic stainless steel
WO2006125412A1 (fr) * 2005-05-23 2006-11-30 Scheller Piotr R Acier austenitique pour construction legere et son utilisation
WO2008099336A1 (fr) * 2007-02-12 2008-08-21 Thyssenkrupp Acciali Speciali Terni S.P.A. Acier inoxydable austénitique
KR101375600B1 (ko) * 2008-09-11 2014-03-17 티센크룹 니로스타 게엠베하 스테인리스강, 그 스테인리스강으로 제조한 냉간 스트립, 및 그 스테인리스강으로 평판 강 제품을 제조하는 방법
JP2012502186A (ja) * 2008-09-11 2012-01-26 ティッセンクルップ ニロスタ ゲゼルシャフト ミット ベシュレンクテル ハフツング ステンレス鋼、この鋼から製造された冷間圧延ストリップ、及びこの鋼から平鋼製品を製造する方法
WO2010029012A1 (fr) * 2008-09-11 2010-03-18 Thyssenkrupp Nirosta Gmbh Acier inoxydable, feuillard à froid produit avec cet acier et procédé pour fabriquer un produit plat à partir de cet acier
US8608873B2 (en) 2008-09-11 2013-12-17 Outokumpu Nirosta Gmbh Stainless steel, cold strip produced from this steel, and method for producing a flat steel product from this steel
EP2163659A1 (fr) * 2008-09-11 2010-03-17 ThyssenKrupp Nirosta GmbH Acier inoxidable, bande froide fabriquée à partir de cet acier et procédé de fabrication d'un produit plat en acier à partir de cet acier
WO2011135170A1 (fr) 2010-04-29 2011-11-03 Outokumpu Oyj Procédé de fabrication et d'utilisation d'acier inoxydable ferritique austénitique présentant une grande aptitude au formage
US11286546B2 (en) 2010-04-29 2022-03-29 Outokumpu Oyj Method for manufacturing and utilizing ferritic-austenitic stainless steel with high formability
EP2566994A4 (fr) * 2010-05-06 2017-04-05 Outokumpu Oyj Acier inoxydable austénitique à faible teneur en nickel et ses utilisations
WO2011138503A1 (fr) 2010-05-06 2011-11-10 Outokumpu Oyj Acier inoxydable austénitique à faible teneur en nickel et ses utilisations
EP2566994A1 (fr) * 2010-05-06 2013-03-13 Outokumpu Oyj Acier inoxydable austénitique à faible teneur en nickel et ses utilisations
WO2012143610A1 (fr) 2011-04-18 2012-10-26 Outokumpu Oyj Procédé de fabrication et d'utilisation d'acier inoxydable ferritique-austénitique
CN105229177A (zh) * 2013-03-04 2016-01-06 奥托昆普尼罗斯文有限公司 用于制造具有高延伸率的超高强度材料的方法
US10161024B2 (en) 2013-03-04 2018-12-25 Outokumpu Nirosta Gmbh Method for producing an ultra high strength material with high elongation
WO2014135441A1 (fr) * 2013-03-04 2014-09-12 Outokumpu Nirosta Gmbh Procédé de production d'un matériau à très haute résistance présentant un allongement élevé
DE102015005742A1 (de) 2015-05-05 2016-11-10 Dbi Gas- Und Umwelttechnik Gmbh Verfahren zur Herstellung von Feinblech aus einem nichtrostenden, austenitischen CrMnNi-Stahl

Also Published As

Publication number Publication date
ES2250773T3 (es) 2006-04-16
DE50301283D1 (de) 2006-02-16
EP1352982B1 (fr) 2005-10-05
ATE305986T1 (de) 2005-10-15
DE10215598A1 (de) 2003-10-30
EP1352982A3 (fr) 2004-01-07

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