DE3937031C1 - Conversion of work material to martensitic chromium steel - for prepn. of sharp knives - Google Patents
Conversion of work material to martensitic chromium steel - for prepn. of sharp knivesInfo
- Publication number
- DE3937031C1 DE3937031C1 DE19893937031 DE3937031A DE3937031C1 DE 3937031 C1 DE3937031 C1 DE 3937031C1 DE 19893937031 DE19893937031 DE 19893937031 DE 3937031 A DE3937031 A DE 3937031A DE 3937031 C1 DE3937031 C1 DE 3937031C1
- Authority
- DE
- Germany
- Prior art keywords
- steel
- prepn
- conversion
- work material
- chromium steel
- 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
- 229910000734 martensite Inorganic materials 0.000 title claims abstract description 6
- 239000000463 material Substances 0.000 title claims description 4
- 238000006243 chemical reaction Methods 0.000 title 1
- 229910001220 stainless steel Inorganic materials 0.000 title 1
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 229910052804 chromium Inorganic materials 0.000 claims description 9
- 229910052750 molybdenum Inorganic materials 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 229910052748 manganese Inorganic materials 0.000 claims description 7
- 229910052758 niobium Inorganic materials 0.000 claims description 7
- 229910052720 vanadium Inorganic materials 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 229910000669 Chrome steel Inorganic materials 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 5
- 235000013372 meat Nutrition 0.000 abstract description 3
- 150000001247 metal acetylides Chemical class 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000007670 refining Methods 0.000 abstract description 2
- 239000011651 chromium Substances 0.000 description 7
- 239000011572 manganese Substances 0.000 description 5
- 239000010955 niobium Substances 0.000 description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 3
- 239000011733 molybdenum Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- -1 Niobium carbides Chemical class 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
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
- C22C38/22—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
- 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
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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)
- Knives (AREA)
- Nonmetal Cutting Devices (AREA)
- Crushing And Pulverization Processes (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Accessories And Tools For Shearing Machines (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
Description
Die Erfindung betrifft die Verwendung eines hochfesten, zähen, korrosionsbeständigen Stahls für die Herstellung von Kuttermessern.The invention relates to the use of a high-strength, tough, corrosion-resistant steel for the production of Cutter knives.
Kuttermesser werden zum Schneiden von Fleisch verwendet. Ein für Kuttermesser geeigneter Stahl muß ein ganz bestimmtes Eigenschaftsspektrum besitzen. Dieses umfaßtCutters are used to cut meat. A steel suitable for cutter knives must be a whole possess a certain range of properties. This includes
- - gute Korrosionsbeständigkeit gegenüber der beim Schneiden von Fleisch austretenden Gewebeflüssigkeit (Salzlösung),- good corrosion resistance compared to cutting tissue fluid escaping from meat (saline solution),
- - hohe Härte zur Sicherung der Schneidhaltigkeit,- high hardness to ensure cutting edge stability,
- - hohe Festigkeit, um den bei den hohen Umdrehungsgeschwindigkeiten um 4000 U/min auftretenden Fliehkräften standzuhalten,- high strength to the high Rotational speeds occurring around 4000 rpm To withstand centrifugal forces,
- - guten Verschleißwiderstand, um größere Zeitintervalle ohne Nachschärfen zu überstehen,- good wear resistance to longer time intervals without Survive resharpening,
- - ausreichende Zähigkeit, um auch härtere, z. B. tiefgefrorene Stücke schneiden zu können,- Sufficient toughness to handle even harder, e.g. B. to be able to cut frozen pieces
- - gute Polierfähigkeit, um einen guten optischen Eindruck zu vermitteln, bei- good polishability to give a good visual impression to convey at
- - möglichst preisgünstiger Herstellbarkeit.- As inexpensive to manufacture.
Es ist seit langem, nämlich seit über 50 Jahren, bekannt, für Messer martensitische rostbeständige Chromstähle mit 0,2 bis 2,5% C, 8 bis 22% Cr sowie üblichen Gehalten an Mangan, Silizium, Phosphor, Schwefel und Stickstoff, sowie 0,2 bis 6% Molybdän und/oder Wolfram zu verwenden (DE-PS 1 59 794). Ein Beispiel ist ein Stahl mit rund 1% C, 0,5% Mn, 0,24% Si, 13% Cr, 1% Mo und 0,14% N. Ähnlich zusammengesetzte Stähle für Schneidwerkzeuge sind aus der DE-AS 17 52 655 mit zusätzlichen Gehalten an den Karbidbildnern Vanadium, Titan, Tantal, Niob und Zirkon, in einer Gesamtmenge bis 2% bekannt. Als Beispiel wird ein Stahl mit 0,6% C, 1% Si, 0,36% Mn, 10,5% Cr und 1,0% Mo genannt. Dieser bekannte Stahl enthält mindestens 20% Restaustenit.It has been known for a long time, namely for over 50 years, for knives with martensitic rust-resistant chrome steels 0.2 to 2.5% C, 8 to 22% Cr and usual contents Manganese, silicon, phosphorus, sulfur and nitrogen, as well as 0.2 to 6% molybdenum and / or tungsten (DE-PS 1 59 794). An example is a steel with around 1% C, 0.5% Mn, 0.24% Si, 13% Cr, 1% Mo and 0.14% N. Similar composite steels for cutting tools are made of DE-AS 17 52 655 with additional contents on the Carbide formers vanadium, titanium, tantalum, niobium and zircon, in a total of up to 2% is known. As an example, a Steel with 0.6% C, 1% Si, 0.36% Mn, 10.5% Cr and 1.0% Mo called. This known steel contains at least 20% Residual austenite.
Für die spezielle Verwendung für Kuttermesser nennt die DE-OS 33 39 904 einen Dreischichtstahl, wobei entweder eine harte Mittelschicht zwischen zwei zähen Schichten oder eine zähe Mittelschicht zwischen zwei harten Schichten liegt, die durch Verbundwalzen miteinander verbunden werden. Verwendet werden für die einzelnen Schichten verhältnismäßig hoch chromhaltige Stähle mit 14 bzw. 18% Cr. Die zähe Schicht hat einen verhältnismäßig niedrigen Kohlenstoffgehalt um 0,1%. Der Kohlenstoffgehalt der harten Schicht liegt bei rund 1%. Neben üblichen Gehalten an Silizium und Mangan unter 1% können diese Stähle jeweils 1 bis 2% Molybdän und 1 bis 2% Vanadium enthalten.For the special use for cutter knives the DE-OS 33 39 904 a three-layer steel, either one hard middle layer between two tough layers or one tough middle class lies between two hard layers, which are connected to each other by compound rollers. Are used for the individual layers relatively high chromium steels with 14 or 18% Cr. The tough layer has a relative low carbon content by 0.1%. The carbon content the hard layer is around 1%. In addition to usual They can contain less than 1% of silicon and manganese Steels 1 to 2% molybdenum and 1 to 2% vanadium contain.
Der Erfindung liegt nun die Aufgabe zugrunde, einen Stahl für Kuttermesser vorzuschlagen, der hinsichtlich des vorgenannten Eigenschaftsspektrums optimale Werte bei günstigem Erzeugungspreis besitzt.The invention is based on the object of a steel to propose for cutter knives, which regarding the above-mentioned property spectrum optimal values possesses favorable production price.
Zur Lösung dieser Aufgabe wird erfindungsgemäß vorgeschlagen, einen martensitischen Stahl mitTo solve this problem, the invention proposed using a martensitic steel
0,7 bis 0,9% C,
weniger als 1% Si,
weniger als 1% Mn,
0,5 bis 1,5% Mo,
0,7 bis 0,95% V,
0,3 bis 0,9% Nb,
12,1 bis 13,9% Cr,0.7 to 0.9% C,
less than 1% Si,
less than 1% Mn,
0.5 to 1.5% Mo,
0.7 to 0.95% V,
0.3 to 0.9% Nb,
12.1 to 13.9% Cr,
Rest Fe einschließlich erschmelzungsbedingter Verunreini gungen zur Herstellung von Kuttermessern zu verwenden. Remainder of Fe including melting related impurities to use cutter knives.
Ein Stahl aus diesem Bereich mit im Mittel 0,80% C, 0,50% Si, 0,45% Mn, 13,0% Cr, 1,3% Mo, 0,90% V und 0,70% Nb hat sich für Kuttermesser besonders bewährt. Die Ursache hierfür ist darin zu sehen, daß der erfindungsgemäß zu verwendende Stahl gegenüber dem bisher verwendeten Stahl, Werkstoffnummer 1.4153, aufgrund seines höheren Molybdängehaltes sowie der kornverfeinernden Wirkung von Niob eine hervorragende Korrosionsbeständigkeit aufweist. Ferner bewirken die in feiner Form ausgeschiedenen primären Niobcarbide zusammen mit den beim Anlassen ausgeschiedenen Sekundärcarbiden einen hohen Verschleißwiderstand.A steel from this range with an average of 0.80% C, 0.50% Si, 0.45% Mn, 13.0% Cr, 1.3% Mo, 0.90% V and 0.70% Nb has proven particularly useful for cutter knives. The The reason for this is the fact that the invention steel to be used compared to the previously used Steel, material number 1.4153, due to its higher Molybdenum content and the grain-refining effect of Niobium has excellent corrosion resistance. Furthermore, the primary excreted in fine form Niobium carbides together with those excreted during tempering Secondary carbides have a high wear resistance.
Die Herstellung des Stahls erfolgt üblicherweise auf schmelzmetallurgischem Weg. Die warm- und anschließend kaltgewalzten Bänder werden zu Kuttermessern verarbeitet. Die Messer werden dann nach dem Austenitisieren bei 1050 bis 1100°C zur Erzeugung des martensitischen Umwandlungsgefüges von Härtetemperatur beschleunigt abgeschreckt und anschließend zur Erzielung optimaler Härte, Zähigkeit und Korrosionsbeständigkeit bei Temperaturen von 460 bis 560°C angelassen.The steel is usually manufactured on metallurgical path. The warm and then cold rolled strips are processed into cutter knives. The knives are then at 1050 after austenitizing up to 1100 ° C to produce the martensitic Process of transformation accelerated by hardening temperature quenched and then more optimal to achieve Hardness, toughness and corrosion resistance Tempered temperatures from 460 to 560 ° C.
Danach sind folgende Eigenschaften erreichbar.The following properties can then be reached.
Bei nahezu gleicher Härte erreicht der erfindungsgemäß zu verwendende Stahl aufgrund seiner feineren und gleichmäßigeren Carbidausbildung eine um 15 bis 25% höhere Zähigkeit, s. Fig. 1. Bei Dauerschwingversuchen wurde eine 50% höhere Dauerschwingfestigkeit festgestellt, wodurch die Standzeit von hochbeanspruchten Kuttermessern deutlich gesteigert werden kann. Im Salzsprühtest ergab sich für den erfindungsgemäß zu verwendenden Stahl ein erheblich geringerer Korrosionsangriff als bei dem Vergleichsstahl, Werkstoff-Nummer 1.4153.With almost the same hardness, the steel to be used according to the invention achieves a 15 to 25% higher toughness due to its finer and more uniform carbide formation, see FIG. Fig. 1. In fatigue tests, a 50% higher fatigue strength was found, whereby the service life of highly stressed cutter knives can be significantly increased. The salt spray test showed that the steel to be used according to the invention had a considerably lower corrosion attack than the comparative steel, material number 1.4153.
Claims (2)
weniger als 1% Si,
weniger als 1% Mn,
0,5 bis 1,5% Mo,
0,7 bis 0,95% V,
0,3 bis 0,9% Nb,
12,1 bis 13,9% Cr,Rest Fe einschließlich erschmelzungsbedingter Verunreini gungen als Werkstoff zur Herstellung von Kuttermessern.1. Use of a martensitic chrome steel consisting of (in% by weight) 0.7 to 0.9% C,
less than 1% Si,
less than 1% Mn,
0.5 to 1.5% Mo,
0.7 to 0.95% V,
0.3 to 0.9% Nb,
12.1 to 13.9% Cr, remainder Fe including melting-related impurities as a material for the production of cutter knives.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19893937031 DE3937031C1 (en) | 1989-11-07 | 1989-11-07 | Conversion of work material to martensitic chromium steel - for prepn. of sharp knives |
| FR9013717A FR2654115B1 (en) | 1989-11-07 | 1990-11-06 | IMPLEMENTATION OF CHROME MARTENSITIC STEEL FOR KNIVES OF MEAT MINCERS. |
| SK544190A SK544190A3 (en) | 1989-11-07 | 1990-11-06 | Knife for meat mincing and mixing machines |
| CS905441A CZ281654B6 (en) | 1989-11-07 | 1990-11-06 | Knife for mincing machines |
| JP30002790A JPH03264650A (en) | 1989-11-07 | 1990-11-07 | Chromium-containing martensite steel for use in manufacture of cutter knife |
| YU211490A YU47383B (en) | 1989-11-07 | 1990-11-07 | USE OF MARTENSITE CHROME STEEL AS A MATERIAL FOR MAKING A KNIFE KNIFE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19893937031 DE3937031C1 (en) | 1989-11-07 | 1989-11-07 | Conversion of work material to martensitic chromium steel - for prepn. of sharp knives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3937031C1 true DE3937031C1 (en) | 1990-09-13 |
Family
ID=6393032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19893937031 Expired - Lifetime DE3937031C1 (en) | 1989-11-07 | 1989-11-07 | Conversion of work material to martensitic chromium steel - for prepn. of sharp knives |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPH03264650A (en) |
| CZ (1) | CZ281654B6 (en) |
| DE (1) | DE3937031C1 (en) |
| FR (1) | FR2654115B1 (en) |
| SK (1) | SK544190A3 (en) |
| YU (1) | YU47383B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4206427A1 (en) * | 1992-02-29 | 1993-09-02 | Bestar Stahlhandels Gmbh | USE OF A STEEL FOR THE MANUFACTURE OF CHUTATE KNIVES |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1927461A1 (en) * | 1968-05-31 | 1969-12-04 | Uddeholms Ab | Blanks for razor blades, razor blade tape or similar thin-edged cutting tools |
| DE1752655A1 (en) * | 1967-06-30 | 1972-03-16 | Sandvikens Jernverks Ab | Process for the production of razor blades and other tools with a thin cutting edge and razor blades and tools with a cutting edge produced in this way |
| DE3339904A1 (en) * | 1983-11-04 | 1985-05-15 | Bergische Stahl-Industrie | THREE-LAYER STEEL AND ITS USE FOR CUTTER KNIVES ETC. |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3859147A (en) * | 1972-03-10 | 1975-01-07 | Carpenter Technology Corp | Hot hard stainless steel |
-
1989
- 1989-11-07 DE DE19893937031 patent/DE3937031C1/en not_active Expired - Lifetime
-
1990
- 1990-11-06 CZ CS905441A patent/CZ281654B6/en not_active IP Right Cessation
- 1990-11-06 FR FR9013717A patent/FR2654115B1/en not_active Expired - Lifetime
- 1990-11-06 SK SK544190A patent/SK544190A3/en unknown
- 1990-11-07 YU YU211490A patent/YU47383B/en unknown
- 1990-11-07 JP JP30002790A patent/JPH03264650A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1752655A1 (en) * | 1967-06-30 | 1972-03-16 | Sandvikens Jernverks Ab | Process for the production of razor blades and other tools with a thin cutting edge and razor blades and tools with a cutting edge produced in this way |
| DE1927461A1 (en) * | 1968-05-31 | 1969-12-04 | Uddeholms Ab | Blanks for razor blades, razor blade tape or similar thin-edged cutting tools |
| DE3339904A1 (en) * | 1983-11-04 | 1985-05-15 | Bergische Stahl-Industrie | THREE-LAYER STEEL AND ITS USE FOR CUTTER KNIVES ETC. |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4206427A1 (en) * | 1992-02-29 | 1993-09-02 | Bestar Stahlhandels Gmbh | USE OF A STEEL FOR THE MANUFACTURE OF CHUTATE KNIVES |
| EP0559073A1 (en) * | 1992-02-29 | 1993-09-08 | BESTAR STAHLHANDELS GmbH | Use of a steel for the manufacturing of cutter knives |
Also Published As
| Publication number | Publication date |
|---|---|
| SK281386B6 (en) | 2001-03-12 |
| JPH03264650A (en) | 1991-11-25 |
| SK544190A3 (en) | 2001-03-12 |
| YU211490A (en) | 1994-01-20 |
| CZ281654B6 (en) | 1996-12-11 |
| FR2654115B1 (en) | 1993-04-09 |
| FR2654115A1 (en) | 1991-05-10 |
| CZ544190A3 (en) | 1996-10-16 |
| YU47383B (en) | 1995-01-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8100 | Publication of the examined application without publication of unexamined application | ||
| D1 | Grant (no unexamined application published) patent law 81 | ||
| 8364 | No opposition during term of opposition | ||
| 8327 | Change in the person/name/address of the patent owner |
Owner name: EDELSTAHL WITTEN-KREFELD GMBH, 58452 WITTEN, DE Owner name: G. WALTER STEFFENS GMBH & CO, 42857 REMSCHEID, DE |
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| 8327 | Change in the person/name/address of the patent owner |
Owner name: DEUTSCHE EDELSTAHLWERKE GMBH, 58452 WITTEN, DE Owner name: G. WALTER STEFFENS GMBH & CO, 42857 REMSCHEID, DE |