EP0694622B1 - Korrosionbeständige Legierung und Verfahren zur Herstellung korrosionsbeständiger Schneidwaren - Google Patents
Korrosionbeständige Legierung und Verfahren zur Herstellung korrosionsbeständiger Schneidwaren Download PDFInfo
- 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
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.
Description
Weiters setzt sich die Erfindung zum Ziel, ein Verfahren zur Herstellung korrosionsbeständiger Schneidewaren für die Lebensmittelindustrie und für medizinische Instrumente anzugeben, mit welchen die Nachteile der bekannten Schneidteile beseitigt werden.
Es zeigen
Claims (8)
- Korrosionsbeständige, für einen Hautkontakt verträgliche Legierung mit einer Härte von größer als 54 HRC, guter Polierfähigkeit und hoher Biegezähigkeit enthaltend die Elemente in Gew.-%C = 0,40 b is 0,85Si = bis 1,0Mn = bis 1,4Cr = 16,0 bis 19,0Mo = 0,8 bis 1,5V = 0,05 bis 0,2Nb = bis 0,15Ti bis 0,18N = 0,12 bis 0,29
mit der Maßgabe, daß die Gehalte anNi maximal 0,25Co maximal 0,20Cu maximal 0,25Ni + Co +Cu maximal 0,48 - Legierung nach Anspruch 1, dadurch gekennzeichnet, daß die Gehalte an in Gew.-%Ni maximal 0,15Cu maximal 0,15Ni + Co + Cu maximal 0,24
- Legierung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Summe der Konzentration von Kohlenstoff und Stickstoff einen Wert von mindestens 0,66 und höchstens 0,84 ergibt.
- Verfahren zur Herstellung korrosionsbeständiger, für einen Hautkontakt verträglicher Schneidwaren mit einer Härte von 54 bis 61 HRC und hoher Biegezähigkeit insbesondere für die Lebensmittelindustrie und für medizinische Instrumente aus einer Legierung enthaltend die Elemente in Gew.-%C = 0,40 bis 0,84Si = bis 1,0Mn = bis 1,4Cr = 16,0 bis 19,0Mo= 0,8 bis 1,5V = 0,05 bis 0,2Nb= bis 0,15Ti = bis 0,18N = 0,12 bis 0,29
mit der Maßgabe, daß die Gehalte anNi maximal 0,25Co maximal 0,20Cu maximal 0,25Ni + Co +Cu maximal 0,48 - Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Legierung mit Gehalten an in Gew.-%Ni maximal 0,15Cu maximal 0,15Ni +Co +Cu maximal 0,24
von C+N von 0,66 bis 0,84 hergestellt wird. - Verfahren nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, daß die Abkühlung der Teile mit erhöhter Intensität im Quettenverfahren, gegebenenfalls mit Wasser, vorzugweise mit Preßluft, insbesondere mit Öl, durchgeführt wird.
- Verfahren nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, daß die Austenitisierung der Teile in einem Temperaturbereich zwischen 960 und 1050 °c, vorzugsweise von 980 bis 1030 °C, durchgeführt wird.
- Verfahren nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, daß nach dem Abkühlen mit erhöhter Intensität von der Austenitisierungstemperatur der Teil einer Tiefkühlbehandlung bei einer Temperatur von unter minus 55 °C , vorzugsweise unter minus 70 °C, unterworfen wird.
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 |
AT128394 | 1994-06-29 | ||
AT1283/94 | 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 (de) |
AT (2) | AT401387B (de) |
DE (1) | DE59509656D1 (de) |
DK (1) | DK0694622T3 (de) |
ES (1) | ES2164142T3 (de) |
FI (1) | FI111273B (de) |
NO (1) | NO309045B1 (de) |
Cited By (1)
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)
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)
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, De | |
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. |
-
1994
- 1994-06-29 AT AT0128394A patent/AT401387B/de not_active IP Right Cessation
-
1995
- 1995-06-26 NO NO952557A patent/NO309045B1/no not_active IP Right Cessation
- 1995-06-28 EP EP95890122A patent/EP0694622B1/de not_active Expired - Lifetime
- 1995-06-28 AT AT95890122T patent/ATE206477T1/de active
- 1995-06-28 DE DE59509656T patent/DE59509656D1/de not_active Expired - Lifetime
- 1995-06-28 ES ES95890122T patent/ES2164142T3/es not_active Expired - Lifetime
- 1995-06-28 DK DK95890122T patent/DK0694622T3/da active
- 1995-06-29 FI FI953218A patent/FI111273B/fi not_active IP Right Cessation
Cited By (1)
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 |
---|---|
AT401387B (de) | 1996-08-26 |
DE59509656D1 (de) | 2001-11-08 |
FI953218A0 (fi) | 1995-06-29 |
ES2164142T3 (es) | 2002-02-16 |
ATA128394A (de) | 1996-01-15 |
DK0694622T3 (da) | 2002-01-21 |
NO952557D0 (no) | 1995-06-26 |
ATE206477T1 (de) | 2001-10-15 |
NO309045B1 (no) | 2000-12-04 |
FI953218A (fi) | 1995-12-30 |
EP0694622A1 (de) | 1996-01-31 |
NO952557L (no) | 1996-01-02 |
FI111273B (fi) | 2003-06-30 |
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