EP0977901A1 - Alliage fer-manganese-chrome a resistance elevee, resistant a la corrosion - Google Patents

Alliage fer-manganese-chrome a resistance elevee, resistant a la corrosion

Info

Publication number
EP0977901A1
EP0977901A1 EP98921467A EP98921467A EP0977901A1 EP 0977901 A1 EP0977901 A1 EP 0977901A1 EP 98921467 A EP98921467 A EP 98921467A EP 98921467 A EP98921467 A EP 98921467A EP 0977901 A1 EP0977901 A1 EP 0977901A1
Authority
EP
European Patent Office
Prior art keywords
mass
manganese
alloy
alloys
chromium
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
EP98921467A
Other languages
German (de)
English (en)
Other versions
EP0977901B1 (fr
Inventor
Ulrich Brill
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.)
Krupp VDM GmbH
Original Assignee
Krupp VDM 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
Priority claimed from DE19716795A external-priority patent/DE19716795C2/de
Application filed by Krupp VDM GmbH filed Critical Krupp VDM GmbH
Publication of EP0977901A1 publication Critical patent/EP0977901A1/fr
Application granted granted Critical
Publication of EP0977901B1 publication Critical patent/EP0977901B1/fr
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
    • 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

Definitions

  • the invention relates to an austenitic iron-manganese-chromium alloy which is melted under atmospheric pressure and is hot and cold-formable, in particular for use in aqueous media.
  • AT-PS 152 291 discloses chromium-manganese steels with 0.01 to 1.5 mass% carbon, 5 to 25 mass% chromium, 10 to 35 mass% manganese and 0.07 to 0.7 mass% % Nitrogen and possibly relatively small additions of nickel, cobalt, copper, molybdenum, tungsten, vanadium, niobium, tantalum and titanium.
  • Some disclosed iron-manganese-chromium alloys prescribe high carbon contents at the expense of corrosion resistance, in order to use e.g. for rustproof shafts and
  • fcRSATZB Piston rods for shipbuilding or drill collars for the oil and gas industry to achieve sufficient strength.
  • European patent 0 065 631 with 0.17 to 0.40 mass% carbon, 13 to 25 mass% manganese, 0.3 to 1.0 mass% nitrogen, 12 to 20 mass% chromium and 1.0 to 5.0 mass% molybdenum.
  • European patent 0 249 117 also allows up to 0.40% by mass of carbon; At the same time, 13.0 to 25.0 mass% of manganese, 0.3 to 1.0 mass% of nitrogen, 12.0 to 20.0 mass% of chromium and up to 5.0 mass% of molybdenum are required.
  • Iron-manganese-chromium alloys are also used as so-called cap ring steels with a typical composition such as up to 0.12% by mass carbon, 18.5% by mass manganese, 18.5% by mass chromium and 1.0% by mass. Nitrogen. However, materials of this composition should not be melted without pressure, but only under nitrogen pressure, e.g. in a pressure electro-slag remelting plant.
  • SPARE BLADE (RULE 26) are available, and which enjoys the largest possible technical scope.
  • iron-manganese-chromium alloy which contains the following alloy components (figures in mass%):
  • Titanium up to 0.10%
  • the alloy according to the invention differs in the significantly higher nitrogen content, with which it is now possible to set higher chromium and molybdenum contents in the alloy without the ⁇ phase being eliminated, which increases the processability of the alloys from the block or from the continuous casting slab, for example to a hot and cold rolled sheet.
  • the alloy according to the invention has a significantly increased strength and corrosion resistance, especially in aqueous media.
  • aqueous media means any type of bodily fluids and tissue fluids, so that here a special application of the alloy according to the invention, in particular for the production of medical instruments and tools, temperature porous implants such as intramedullary nails, screws and plates as well as brackets and fastening and tensioning wires.
  • the alloy according to the invention can also be used to produce anchors and setting bolts, which may can be used in wet rooms or wetlands.
  • WS active sum
  • WS (% chromium) + 3 x (% molybdenum) + 30 x (% nitrogen).
  • Fig. 1 shows the resulting range of compositions of the alloy according to the invention.
  • the requirement for an active sum> 59 inevitably results in a molybdenum content of at least 2.0% by mass for the lowest nitrogen content of 1.05% by mass.
  • the highest molybdenum content with 5.7 mass% results for the highest nitrogen content of 1.3 mass% and the requirement for at least 12.0 mass% chromium in the alloys.
  • the highest chromium content is inevitably
  • Table 1 shows the dependence of the critical pitting temperature determined in the ASTM G-48 / A test on the nitrogen, chromium and molybdenum content of the alloys. Alloys 1 to 3 represent the state of the art with regard to commercially introduced materials. Alloys 4 to 12 disclose the state of the art known from patents and other publications, while alloys 13 to 20 are to be regarded as in accordance with the invention.
  • Fig. 2 the tensile strength is plotted against the degree of deformation for different alloys.
  • Alloys 17 and 19 according to the invention achieve tensile strengths of> 2000 N / mm 2 compared to the comparative alloys, as are required, for example, for anchors and setting bolts.
  • the materials not according to the invention are alloys of the following compositions:
  • alloy 17 alloy according to the invention
  • alloy 11 material according to the prior art
  • FIG. 3 The results of alloy 17 (alloy according to the invention) and alloy 11 (material according to the prior art) are shown in FIG. 3 as an example of the behavior of the alloys according to the invention and the materials corresponding to the prior art.
  • the significantly higher corrosion resistance of the alloy according to the invention is evident from the breakthrough potential which is much higher at approximately 1,300 mV (GKE) compared to 200 mV (GKE).
  • the alloys according to the invention not only show an exceptionally high resistance in mineral acids, but also show
  • REPLACEMENT SHEET (REGa 26) are also characterized by very high mechanical strength after cold working.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Materials For Medical Uses (AREA)
  • Heat Treatment Of Steel (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

L'invention concerne un alliage fer-manganèse-chrome austénitique fondu sous pression atmosphérique, qui comprend les constituants suivants (données en % en poids): Cr, entre 12,0 et 24,7 %, Ni, jusqu'à 0,10 %, Mn, entre 23,5 et 25,0 % en poids, Si, jusqu'à 0,20 %, Mo, entre 2,0 et 5,7 %, Ti, jusqu'à 0,10 %, C, jusqu'à 0,015 %, N, entre 1,05 et 1,30 %, Zr, entre 0,01 et 0,15 %, Cu, entre 0,8 et 2,0 %, B, entre 0,002 et 0,005 %, le reste étant composé de fer et d'impuretés inévitables.
EP98921467A 1997-04-22 1998-04-17 Alliage fer-manganese-chrome a resistance elevee, resistant a la corrosion Expired - Lifetime EP0977901B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19716795 1997-04-22
DE19716795A DE19716795C2 (de) 1997-04-22 1997-04-22 Verwendung einer hochfesten und korrosionsbeständigen Eisen-Mangan-Chrom-Legierung
PCT/EP1998/002299 WO1998048070A1 (fr) 1997-04-22 1998-04-17 Alliage fer-manganese-chrome a resistance elevee, resistant a la corrosion

Publications (2)

Publication Number Publication Date
EP0977901A1 true EP0977901A1 (fr) 2000-02-09
EP0977901B1 EP0977901B1 (fr) 2001-06-13

Family

ID=7827273

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98921467A Expired - Lifetime EP0977901B1 (fr) 1997-04-22 1998-04-17 Alliage fer-manganese-chrome a resistance elevee, resistant a la corrosion

Country Status (7)

Country Link
EP (1) EP0977901B1 (fr)
AT (1) ATE202158T1 (fr)
DE (1) DE19758613C2 (fr)
HU (1) HUP0001778A3 (fr)
NO (1) NO995133D0 (fr)
SK (1) SK145499A3 (fr)
WO (1) WO1998048070A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT407882B (de) 1999-07-15 2001-07-25 Schoeller Bleckmann Oilfield T Verfahren zur herstellung eines paramagnetischen, korrosionsbeständigen werkstoffes u.dgl. werkstoffe mit hoher dehngrenze, festigkeit und zähigkeit
AT412727B (de) 2003-12-03 2005-06-27 Boehler Edelstahl Korrosionsbeständige, austenitische stahllegierung

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT152291B (de) * 1936-10-07 1938-01-25 Boehler & Co Ag Geb Chrom-Mangan-Stähle mit 0¨01 1¨5% Kohlenstoff, 5 25% Chrom, 10 35% Mangan.
DE917672C (de) * 1939-01-03 1954-09-09 Boehler & Co Ag Geb Herstellen von rostbestaendigen und unmagnetischen Blechen, Streifen oder Baendern fuer Flugzeugbespannungen
CH680267A4 (de) * 1967-05-13 1969-11-14 Straumann Inst Ag Bauelement mit einem von Null nur wenig abweichenden Temperaturkoeffizienten für ein Zeitmessgerät
US4121953A (en) * 1977-02-02 1978-10-24 Westinghouse Electric Corp. High strength, austenitic, non-magnetic alloy
CA1205659A (fr) * 1981-03-20 1986-06-10 Masao Yamamoto Bague de retenue en acier amagnetique a l'epreuve de la corrosion pour generatrices
DE3940438C1 (fr) * 1989-12-07 1991-05-23 Vereinigte Schmiedewerke Gmbh, 4630 Bochum, De
AT397968B (de) * 1992-07-07 1994-08-25 Boehler Ybbstalwerke Korrosionsbeständige legierung zur verwendung als werkstoff für in berührungskontakt mit lebewesen stehende teile
DE4242757C1 (de) * 1992-12-17 1994-03-24 Krupp Vdm Gmbh Verwendung einer korrosionsbeständigen Eisenbasislegierung für Gegenstände, die unter Hautkontakt am Körper getragen werden
DE19513407C1 (de) * 1995-04-08 1996-10-10 Vsg En & Schmiedetechnik Gmbh Verwendung einer austenitischen Stahllegierung für hautverträgliche Gegenstände

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9848070A1 *

Also Published As

Publication number Publication date
EP0977901B1 (fr) 2001-06-13
SK145499A3 (en) 2000-07-11
NO995133L (no) 1999-10-21
DE19758613C2 (de) 2000-12-07
NO995133D0 (no) 1999-10-21
ATE202158T1 (de) 2001-06-15
WO1998048070A1 (fr) 1998-10-29
HUP0001778A2 (hu) 2000-09-28
HUP0001778A3 (en) 2000-11-28

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