EP0694622B1 - Korrosionbeständige Legierung und Verfahren zur Herstellung korrosionsbeständiger Schneidwaren - Google Patents

Korrosionbeständige Legierung und Verfahren zur Herstellung korrosionsbeständiger Schneidwaren Download PDF

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Publication number
EP0694622B1
EP0694622B1 EP95890122A EP95890122A EP0694622B1 EP 0694622 B1 EP0694622 B1 EP 0694622B1 EP 95890122 A EP95890122 A EP 95890122A EP 95890122 A EP95890122 A EP 95890122A EP 0694622 B1 EP0694622 B1 EP 0694622B1
Authority
EP
European Patent Office
Prior art keywords
alloy
temperature
concentrations
corrosion resistant
carbon
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.)
Expired - Lifetime
Application number
EP95890122A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0694622A1 (de
Inventor
Manfred Ing. Gstettner
Karl Dipl.-Ing. Leban
Gerhard Dipl.-Ing. Dr. Hackl
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.)
Voestalpine Boehler Edelstahl GmbH
Original Assignee
Boehler Ybbstalwerke GmbH
Boehler Edelstahl 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 Boehler Ybbstalwerke GmbH, Boehler Edelstahl GmbH filed Critical Boehler Ybbstalwerke GmbH
Publication of EP0694622A1 publication Critical patent/EP0694622A1/de
Application granted granted Critical
Publication of EP0694622B1 publication Critical patent/EP0694622B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/002—Heat treatment of ferrous alloys containing Cr
    • 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
    • C21D9/18—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for knives, scythes, scissors, or like hand cutting tools
    • 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
    • C22C38/22—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
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/78—Combined heat-treatments not provided for above
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/04—Hardening by cooling below 0 degrees Celsius

Definitions

  • the invention relates to a corrosion-resistant alloy. Furthermore, the invention relates to a method for Production of cutlery with high hardness and great flexural strength.
  • Stainless steels i.e. iron-based alloys with a Cr content of around 13%, e.g. DIN material no. 1.4110, are used successfully for cutlery used.
  • alloys with approx. 18% Cr content e.g. Material No. 1.4112 for Use which increased due to a higher Cr concentration Resistant to chemical attack.
  • Alloys with approx. 18% Cr and However, above 0.85% C have the disadvantage that, in particular, through coarse Carbide deposits, although with increased wear resistance and hardness of the Material, the bending toughness and the polishability can be reduced. An attempt has already been made to use a steel with approx.
  • DE-C-3 901 470 relates to a corrosion-resistant, high-strength martensitic cold work steel.
  • JP-A-2-166 228 relates to a high-carbon stainless steel with excellent quenching hardness, wear resistance and corrosion resistance.
  • the object of the invention is now to provide a particularly corrosion-resistant alloy which is compatible with skin contact and which has high hardness, good polishability and, in particular, high flexural strength with high fracture resistance, which can also be used in media containing chlorine ions.
  • the invention further aims to provide a method for producing corrosion-resistant cutlery for the food industry and for medical instruments, with which the disadvantages of the known cut parts are eliminated.
  • the advantages achieved by the invention are in particular that the Composition of the alloy with a low total carbide content low Carbide grain sizes as well as a high matrix hardness and therefore a good grinding and This ensures polishability and, in particular, good bending toughness important that in the concentration limits the sum of the contents of carbon and nitrogen are in a certain range. It was surprising found that the steel with a chromium content of about 17.5% Chromium concentration in the matrix increased by alloying with nitrogen and thus the corrosion resistance can be improved, without The carbon concentration can be reduced.
  • the Advantages achieved by the invention can be seen essentially in the fact that alloys can be produced economically and by heat treatment
  • the knives and instruments made from it have the best usage properties Parts can be reached. It is important that the alloy engineering Requirements are given and that by solution annealing a homogeneous structure is achieved. It is also of particular importance a soft annealing of the material around the A3 point of the alloy in front of you Austenitize to the excretion and transformation kinetics in subsequent cooling with increased intensity.
  • a subsequent tempering treatment is carried out at a comparatively low temperature carried out and serves in particular to relax the material.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Heat Treatment Of Articles (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Powder Metallurgy (AREA)
  • Dry Shavers And Clippers (AREA)
  • ing And Chemical Polishing (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Knives (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
EP95890122A 1994-06-29 1995-06-28 Korrosionbeständige Legierung und Verfahren zur Herstellung korrosionsbeständiger Schneidwaren Expired - Lifetime EP0694622B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0128394A AT401387B (de) 1994-06-29 1994-06-29 Korrosionsbeständige legierung und verfahren zur herstellung korrosionsbeständiger schneidwaren
AT1283/94 1994-06-29
AT128394 1994-06-29

Publications (2)

Publication Number Publication Date
EP0694622A1 EP0694622A1 (de) 1996-01-31
EP0694622B1 true EP0694622B1 (de) 2001-10-04

Family

ID=3510544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95890122A Expired - Lifetime EP0694622B1 (de) 1994-06-29 1995-06-28 Korrosionbeständige Legierung und Verfahren zur Herstellung korrosionsbeständiger Schneidwaren

Country Status (7)

Country Link
EP (1) EP0694622B1 (no)
AT (2) AT401387B (no)
DE (1) DE59509656D1 (no)
DK (1) DK0694622T3 (no)
ES (1) ES2164142T3 (no)
FI (1) FI111273B (no)
NO (1) NO309045B1 (no)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6770243B2 (en) 2000-01-17 2004-08-03 Stahlwerk Ergste Westig Gmbh Chrome steel alloy

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT402224B (de) * 1994-11-04 1997-03-25 Boehler Edelstahl Verwendung einer eisenbasislegierung sowie plungerkolben und kolbenring
ES2130065B1 (es) * 1997-03-17 2000-01-16 Gsb Grupo Siderurgico Vasco S Procedimiento de fabricacion de aceros microaleados con estructuras de ferrita acicular enfriadas de forma convencional.
DE102009038382A1 (de) * 2009-08-24 2011-03-03 Stahlwerk Ergste Gmbh Rostfreier martensitischer Chromstahl
DE102011102293A1 (de) * 2011-02-24 2012-08-30 Stahlwerk Ergste Westig Gmbh Verwendung eines Chromstahls mit martensitischem Gefüge und karbidischen Einschlüssen

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT139392B (de) * 1934-02-02 1934-11-10 Oskar Teuchmann Elektromagnetische Schalldose.
DE739958C (de) * 1937-04-30 1943-10-08 Sandvikens Jernverks Ab Stahllegierung fuer durch Walzen oder aehnliche Verarbeitungsverfahren hergestellte korrosionsbestaendige, gehaertete Schneidwerkzeuge
GB643367A (en) * 1947-10-31 1950-09-20 Anders Goeran Molinder Improvements in or relating to the thermal treatment of steel and products thereof
US4150978A (en) * 1978-04-24 1979-04-24 Latrobe Steel Company High performance bearing steels
AT392485B (de) * 1985-05-21 1991-04-10 Boehler Gmbh Werkstoff zur herstellung von stanz- und gegenplatten
JPH02166228A (ja) * 1988-12-20 1990-06-26 Nippon Steel Corp 均一微細な炭化物組織を有する高炭素含有ステンレス鋼の製造方法
DE3901470C1 (en) * 1989-01-19 1990-08-09 Vereinigte Schmiedewerke Gmbh, 4630 Bochum, De Cold-working steel and its use
AT397968B (de) * 1992-07-07 1994-08-25 Boehler Ybbstalwerke Korrosionsbeständige legierung zur verwendung als werkstoff für in berührungskontakt mit lebewesen stehende teile
DE9215141U1 (de) * 1992-11-06 1993-01-07 Borchmann, Michael, Dr.med.dent., 4518 Bad Laer Material zum Gebrauch in der Schmuckwarenindustrie für Schmuckwaren aller Art
FR2708939B1 (fr) * 1993-08-11 1995-11-03 Sima Sa Acier martensitique à l'azote à faible teneur en carbone et son procédé de fabrication.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6770243B2 (en) 2000-01-17 2004-08-03 Stahlwerk Ergste Westig Gmbh Chrome steel alloy

Also Published As

Publication number Publication date
DE59509656D1 (de) 2001-11-08
DK0694622T3 (da) 2002-01-21
FI111273B (fi) 2003-06-30
AT401387B (de) 1996-08-26
ES2164142T3 (es) 2002-02-16
EP0694622A1 (de) 1996-01-31
FI953218A0 (fi) 1995-06-29
NO952557D0 (no) 1995-06-26
FI953218A (fi) 1995-12-30
ATA128394A (de) 1996-01-15
NO952557L (no) 1996-01-02
NO309045B1 (no) 2000-12-04
ATE206477T1 (de) 2001-10-15

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