EP0649913A1 - Hochfestes rostfreies austenitisches Stahl mit Hohergefügebeständigkeit und seine Verwendungen - Google Patents

Hochfestes rostfreies austenitisches Stahl mit Hohergefügebeständigkeit und seine Verwendungen Download PDF

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Publication number
EP0649913A1
EP0649913A1 EP94402202A EP94402202A EP0649913A1 EP 0649913 A1 EP0649913 A1 EP 0649913A1 EP 94402202 A EP94402202 A EP 94402202A EP 94402202 A EP94402202 A EP 94402202A EP 0649913 A1 EP0649913 A1 EP 0649913A1
Authority
EP
European Patent Office
Prior art keywords
stainless steel
steel according
manufacture
chemical composition
corrosion
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
EP94402202A
Other languages
English (en)
French (fr)
Other versions
EP0649913B1 (de
Inventor
François Dupoiron
Jean-Christophe Gagnepain
Richard Cozar
Bernard Mayonobe
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.)
Creusot Loire SA
Creusot Loire Industrie SA
TECPHY
Original Assignee
Creusot Loire SA
Creusot Loire Industrie SA
TECPHY
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 Creusot Loire SA, Creusot Loire Industrie SA, TECPHY filed Critical Creusot Loire SA
Publication of EP0649913A1 publication Critical patent/EP0649913A1/de
Application granted granted Critical
Publication of EP0649913B1 publication Critical patent/EP0649913B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent
    • 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
    • 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

Definitions

  • the present invention relates to an austenitic stainless steel with high mechanical strength, high corrosion resistance and very good structural stability.
  • the purpose of the present invention is to provide an austenitic stainless steel with high mechanical characteristics and which simultaneously has a very high resistance to corrosion in chlorinated medium and a very good structural stability.
  • the subject of the invention is an austenitic stainless steel with a high mechanical characteristic, high resistance to corrosion and having great structural stability, the chemical composition of which comprises by weight: 0.35% ⁇ N ⁇ 0.8% 1% ⁇ W ⁇ 5% and at most 6% of Mn.
  • the chemical composition of the steel comprises by weight: 23% ⁇ Cr ⁇ 28% 15% ⁇ Ni ⁇ 28% 0.5% ⁇ Mn ⁇ 6% 0% ⁇ Cu ⁇ 5% 0% ⁇ C ⁇ 0.06% 0% ⁇ If ⁇ 1% 0% ⁇ Nb ⁇ 0.5% 0% ⁇ V ⁇ 0.5% 0% ⁇ Al ⁇ 0.1% 3% ⁇ MB ⁇ 8% 0.35% ⁇ N ⁇ 0.8% 1% ⁇ W ⁇ 5% the rest being made up of iron and impurities linked to the production.
  • the chemical composition of the steel comprises by weight: 23% ⁇ Cr ⁇ 26% 21% ⁇ Ni ⁇ 23% 2% ⁇ Mn ⁇ 3.5% 1% ⁇ Cu ⁇ 2% 0% ⁇ C ⁇ 0.03% 0% ⁇ If ⁇ 0.4% 0% ⁇ Nb ⁇ 0.5% 0% ⁇ Al ⁇ 0.1% 4.5% ⁇ MB ⁇ 6.5% 0.4% ⁇ N ⁇ 0.55% 2% ⁇ W ⁇ 3.5% the rest being made up of iron and impurities linked to the production.
  • the chemical composition of the steel must, preferably satisfy the relationship: 113 + 16 (% Mo + 0.7% W) + 525% N> 420
  • this steel can be used for the manufacture of solid parts. It can also be used for the manufacture of equipment for massive oil platforms or for the manufacture of equipment for chemical plants, for pulp mills, pollution control facilities or for the manufacture of containers for transport. corrosive products, or finally, for the manufacture of ship hulls. This steel can also be used to make clad sheets.
  • austenitic stainless steels which are alloys based on iron and with a high chromium and nickel content which have a naturally austenitic structure in the solid state at practically any temperature.
  • the structure is not 100% austenitic near the solidification point but becomes so as soon as the temperature drops.
  • the structure is 100% austenitic upon solidification.
  • the inventors have unexpectedly found that by adding simultaneously to these steels high nitrogen contents: from 0.35% by weight to 0.8% by weight, and preferably from 0.4% to 0.55% and in tungsten: from 1% by weight to 5% by weight, and preferably 2% to 3.5%, high mechanical characteristics, very high resistance to corrosion in chlorinated medium and very good were obtained at the same time structural stability, that is to say kinetics of precipitation of intermetallic phases at very slow high temperature.
  • the very good structural stability makes it possible to manufacture massive parts in particular: heavy plates, thick tubes, forged parts, molded parts or welded assemblies whose mechanical and corrosion resistance properties are in all points, including in the vicinity of the welds, excellent.
  • Such steels always contain a little carbon, silicon and aluminum.
  • the carbon content must be less than 0.06% and preferably less than 0.03% to avoid precipitation of carbide at the grain boundaries.
  • the silicon and aluminum which served as deoxidizers during the production are limited to 1% for silicon and 0.1% for aluminum.
  • an austenitic stainless steel is obtained whose elasticity limit Rp 0.2% at ambient is greater than 420 MPa, and whose structural stability characterized by the kinetics of precipitation of intermetallic phases at 850 ° C is higher than those of otherwise equivalent grades.
  • the corrosion resistance is not affected by a thermal cycle corresponding to an implementation such as welding, which is not the case for steels according to the prior art.
  • the corrosion rate in hydrochloric medium is 100 MDJ (mg / dm2 / day); after hyper quenching followed by an sensitization treatment by maintaining at 800 ° C. for 15 min, the corrosion rate under the same conditions is 200 MDJ.
  • the steel according to the invention is much less sensitive to thermal cycles of sensitization. As a result, it is possible to produce clad sheets consisting of a layer of steel according to the invention and a layer of structural steel, the properties of the stainless plating of which are comparable to the properties of a stainless sheet massive made in the same shade.
  • the steel according to the invention having high structural stability can be used to manufacture in particular molded parts, forgings, rolled bars, rolled sheets, profiles, seamless tubes and welded tubes, in particular when these objects are massive, that is to say when they are used in the form of thick pieces that is to say of minimum thickness greater than 4 mm, in particular when they are pieces of greater thickness at 4 mm and less than 40 mm; they then have good homogeneity of characteristics in the thickness; for thicknesses greater than 40 mm, the very good structural stability makes it possible to maintain high levels of resilience and ductility in the thickness.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Catalysts (AREA)
  • Pens And Brushes (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Laminated Bodies (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Articles (AREA)
  • Physical Vapour Deposition (AREA)
EP94402202A 1993-10-21 1994-10-03 Hochfester rostfreier austenitischer Stahl mit hoher Gefügebeständigkeit und seine Verwendungen Expired - Lifetime EP0649913B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9312578 1993-10-21
FR9312578A FR2711674B1 (fr) 1993-10-21 1993-10-21 Acier inoxydable austénitique à hautes caractéristiques ayant une grande stabilité structurale et utilisations.

Publications (2)

Publication Number Publication Date
EP0649913A1 true EP0649913A1 (de) 1995-04-26
EP0649913B1 EP0649913B1 (de) 2000-01-26

Family

ID=9452089

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94402202A Expired - Lifetime EP0649913B1 (de) 1993-10-21 1994-10-03 Hochfester rostfreier austenitischer Stahl mit hoher Gefügebeständigkeit und seine Verwendungen

Country Status (12)

Country Link
US (1) US5494636A (de)
EP (1) EP0649913B1 (de)
AT (1) ATE189268T1 (de)
CA (1) CA2118288C (de)
DE (1) DE69422772T2 (de)
DK (1) DK0649913T3 (de)
ES (1) ES2141808T3 (de)
FI (1) FI109032B (de)
FR (1) FR2711674B1 (de)
GR (1) GR3033188T3 (de)
NO (1) NO302710B1 (de)
PT (1) PT649913E (de)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6354219B1 (en) 1998-05-01 2002-03-12 Owen Oil Tools, Inc. Shaped-charge liner
AU4100299A (en) * 1998-05-27 1999-12-13 U.S. Department of Commerce and National Institute of Standa rds and Technology High nitrogen stainless steel
US6739333B1 (en) * 1999-05-26 2004-05-25 Boehringer Ingelheim Pharma Kg Stainless steel canister for propellant-driven metering aerosols
DE19924098A1 (de) * 1999-05-26 2000-12-07 Boehringer Ingelheim Pharma Edelstahlkanister für treibgasbetriebene Dosieraerosole
SE527177C2 (sv) * 2001-09-25 2006-01-17 Sandvik Intellectual Property Användning av ett austenitiskt rostfritt stål
CA2502206C (en) * 2003-03-20 2010-11-16 Sumitomo Metal Industries, Ltd. Stainless steel for high pressure hydrogen gas, vessel and equipment comprising the steel
US20040221929A1 (en) 2003-05-09 2004-11-11 Hebda John J. Processing of titanium-aluminum-vanadium alloys and products made thereby
US6960820B2 (en) * 2003-07-01 2005-11-01 International Business Machines Corporation Bipolar transistor self-alignment with raised extrinsic base extension and methods of forming same
US7837812B2 (en) 2004-05-21 2010-11-23 Ati Properties, Inc. Metastable beta-titanium alloys and methods of processing the same by direct aging
SE528008C2 (sv) * 2004-12-28 2006-08-01 Outokumpu Stainless Ab Austenitiskt rostfritt stål och stålprodukt
US8430075B2 (en) * 2008-12-16 2013-04-30 L.E. Jones Company Superaustenitic stainless steel and method of making and use thereof
US10053758B2 (en) * 2010-01-22 2018-08-21 Ati Properties Llc Production of high strength titanium
US9255316B2 (en) 2010-07-19 2016-02-09 Ati Properties, Inc. Processing of α+β titanium alloys
US8499605B2 (en) 2010-07-28 2013-08-06 Ati Properties, Inc. Hot stretch straightening of high strength α/β processed titanium
US9206497B2 (en) 2010-09-15 2015-12-08 Ati Properties, Inc. Methods for processing titanium alloys
US8613818B2 (en) 2010-09-15 2013-12-24 Ati Properties, Inc. Processing routes for titanium and titanium alloys
US10513755B2 (en) 2010-09-23 2019-12-24 Ati Properties Llc High strength alpha/beta titanium alloy fasteners and fastener stock
MX364300B (es) * 2011-05-26 2019-04-22 Upl L L C D/B/A United Pipelines Of America Llc Acero inoxidable austenítico.
US8652400B2 (en) 2011-06-01 2014-02-18 Ati Properties, Inc. Thermo-mechanical processing of nickel-base alloys
US9347121B2 (en) 2011-12-20 2016-05-24 Ati Properties, Inc. High strength, corrosion resistant austenitic alloys
US9050647B2 (en) 2013-03-15 2015-06-09 Ati Properties, Inc. Split-pass open-die forging for hard-to-forge, strain-path sensitive titanium-base and nickel-base alloys
US9869003B2 (en) 2013-02-26 2018-01-16 Ati Properties Llc Methods for processing alloys
US9192981B2 (en) 2013-03-11 2015-11-24 Ati Properties, Inc. Thermomechanical processing of high strength non-magnetic corrosion resistant material
US9777361B2 (en) 2013-03-15 2017-10-03 Ati Properties Llc Thermomechanical processing of alpha-beta titanium alloys
US11111552B2 (en) 2013-11-12 2021-09-07 Ati Properties Llc Methods for processing metal alloys
US20150337419A1 (en) * 2014-05-20 2015-11-26 Crs Holdings Inc. Austenitic Stainless Steel Alloy
US10094003B2 (en) 2015-01-12 2018-10-09 Ati Properties Llc Titanium alloy
US10502252B2 (en) 2015-11-23 2019-12-10 Ati Properties Llc Processing of alpha-beta titanium alloys
WO2017105943A1 (en) 2015-12-14 2017-06-22 Swagelok Company Highly alloyed stainless steel forgings made without solution anneal
SE540488C2 (en) * 2017-03-21 2018-09-25 Valmet Oy Method for hydrolysis of lignocellulosic materials
US20190136335A1 (en) 2017-11-07 2019-05-09 Swagelok Company Highly alloyed stainless steel forgings made without solution anneal
CN116695028B (zh) * 2023-05-30 2024-05-14 鞍钢股份有限公司 一种高强韧高耐蚀性核电奥氏体不锈钢及其制造方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0411569A1 (de) * 1989-08-02 1991-02-06 Hitachi Metals, Ltd. Hitzebeständiger Stahl verwendbar für Ventile von Verbrennungsmotoren
EP0545753A1 (de) * 1991-11-11 1993-06-09 Sumitomo Metal Industries, Ltd. Rostfreies Duplexstahl mit verbesserten Festigkeits- und Korrosionsbeständigkeitseigenschaften
EP0566814A1 (de) * 1992-04-24 1993-10-27 FORONI S.p.A. Rostfreies Superduplexstahl mit hohe Korrosionsbeständigkeit und hoher Dehngrenze in lösungsgeglühten Zustand

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US3165400A (en) * 1961-06-27 1965-01-12 Chrysler Corp Castable heat resisting iron alloy
US3969109A (en) * 1974-08-12 1976-07-13 Armco Steel Corporation Oxidation and sulfidation resistant austenitic stainless steel
NO891969L (no) * 1988-05-17 1989-11-20 Thyssen Edelstahlwerke Ag Korrosjonsbestandig austenittisk staal.
SE465373B (sv) * 1990-01-15 1991-09-02 Avesta Ab Austenitiskt rostfritt staal
JPH04218643A (ja) * 1990-12-18 1992-08-10 Hitachi Metals Ltd エンジンバルブ用耐熱合金
FR2705689B1 (fr) * 1993-05-28 1995-08-25 Creusot Loire Acier inoxydable austénitique à haute résistance à la corrosion par les milieux chlorurés et sulfuriques et utilisations.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0411569A1 (de) * 1989-08-02 1991-02-06 Hitachi Metals, Ltd. Hitzebeständiger Stahl verwendbar für Ventile von Verbrennungsmotoren
EP0545753A1 (de) * 1991-11-11 1993-06-09 Sumitomo Metal Industries, Ltd. Rostfreies Duplexstahl mit verbesserten Festigkeits- und Korrosionsbeständigkeitseigenschaften
EP0566814A1 (de) * 1992-04-24 1993-10-27 FORONI S.p.A. Rostfreies Superduplexstahl mit hohe Korrosionsbeständigkeit und hoher Dehngrenze in lösungsgeglühten Zustand

Also Published As

Publication number Publication date
GR3033188T3 (en) 2000-08-31
DE69422772D1 (de) 2000-03-02
PT649913E (pt) 2000-06-30
NO943942L (no) 1995-04-24
DE69422772T2 (de) 2000-06-08
NO302710B1 (no) 1998-04-14
FI944908A0 (fi) 1994-10-19
FI944908A (fi) 1995-04-22
NO943942D0 (no) 1994-10-18
CA2118288A1 (fr) 1995-04-22
ATE189268T1 (de) 2000-02-15
CA2118288C (fr) 2004-10-05
FR2711674B1 (fr) 1996-01-12
EP0649913B1 (de) 2000-01-26
US5494636A (en) 1996-02-27
FR2711674A1 (fr) 1995-05-05
FI109032B (fi) 2002-05-15
ES2141808T3 (es) 2000-04-01
DK0649913T3 (da) 2000-06-19

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