EP0207052A1 - Alloy containing chromium for punching plates and counter plates - Google Patents
Alloy containing chromium for punching plates and counter plates Download PDFInfo
- Publication number
- EP0207052A1 EP0207052A1 EP86890138A EP86890138A EP0207052A1 EP 0207052 A1 EP0207052 A1 EP 0207052A1 EP 86890138 A EP86890138 A EP 86890138A EP 86890138 A EP86890138 A EP 86890138A EP 0207052 A1 EP0207052 A1 EP 0207052A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plates
- punching
- counter
- alloy containing
- containing 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
Links
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 16
- 239000000956 alloy Substances 0.000 title claims abstract description 16
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 8
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 6
- 239000011651 chromium Substances 0.000 title claims abstract description 6
- 238000004080 punching Methods 0.000 title abstract description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 229910052742 iron Inorganic materials 0.000 claims abstract description 7
- 230000007797 corrosion Effects 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000005336 cracking Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 239000000123 paper Substances 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 229910000599 Cr alloy Inorganic materials 0.000 description 2
- 239000000788 chromium alloy Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910001149 41xx steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
-
- 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
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- 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
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
Definitions
- the invention relates to a chromium-containing alloy for punching and counter plates, as are used, for example, in automatic punching machines.
- Base plates are tools that are machined on all sides by planing, milling or grinding and that are provided with holes and recesses that are matched to the machine for fixing the tools in the machine and for fixing the cutting lines.
- the tools must have a high hardness and meet special requirements for plane parallelism and flatness.
- Hardened plates made of low-alloy or medium-alloy tempered steels or tool steels such as e.g. DIN 50 CrMo 4, W.Nr. 1.7228, AISI 4150, with a case hardness of 45-53 HRc.
- DIN 50 CrMo 4, W.Nr. 1.7228, AISI 4150 with a case hardness of 45-53 HRc.
- these steel alloys have a high wear resistance when hardened.
- a particular corrosion occurs in these punching plates, namely stress corrosion cracking, because - as is easily imaginable - particularly high stresses occur in the plates due to the punching pressures.
- the aim of the present invention was to find an alloy which, on the one hand, is able to withstand the high mechanical stresses and, on the other hand, the high corrosion stresses on punching plates.
- the chromium alloys according to the invention for punching and counter plates essentially consist in that they have a content in% by weight of
- Another chromium alloy according to the invention has the following composition in% by weight:
- Remainder iron and manufacturing-related impurities such an alloy being temperable.
- a further chrome alloy according to the invention for punching and counter plates consists in that it has the following composition in% by weight:
- Such an alloy is a hardenable chromium steel. How difficult it is to select such alloys can already be judged by the fact that when punching is carried out, the punching is carried out so precisely It must be performed that, for example, two papers lying one above the other must be punched such that the upper one, which comes into contact with the cutting tool first, is punched through, whereas the lower paper must not have any cut surfaces, but only pressure lines.
- Such die cuts are required, for example, for the production of adhesive labels and the like, and that even the slightest unevenness in the die plates and counter plates can lead to a loss of production of the greatest extent is evident, since such die cuts cannot be uniform throughout.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Physical Vapour Deposition (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Heat Treatment Of Steel (AREA)
- Punching Or Piercing (AREA)
- Laminated Bodies (AREA)
- Table Devices Or Equipment (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
Die Erfindung betrifft eine chromhältige Legierung für Stanz- und Gegenplatten, mit einem Gehalt in Gew.-% <IMAGE> Rest Eisen und herstellungsbedingte Verunreinigungen.The invention relates to a chromium-containing alloy for punching and counter plates, with a content in% by weight of <IMAGE> remainder iron and production-related impurities.
Description
Die Erfindung bezieht sich auf eine chromhältige Legierung für Stanz-und Gegenplatten, wie sie beispielsweise in Stanzautomaten verwendet werden.The invention relates to a chromium-containing alloy for punching and counter plates, as are used, for example, in automatic punching machines.
Bei Stanz-und Gegen-bzw. Bodenplatten handelt es sich um Werkzeuge, die allseitig spanabhebend durch Hobeln, Fräsen oder Schleifen bearbeitet werden und die mit auf die Maschine abgestimmten Bohrungen und Ausnehmungen zur Fixierung der Werkzeuge in der Maschine und zur Fixierung der Schneidlinien versehen sind.With punching and counter or. Base plates are tools that are machined on all sides by planing, milling or grinding and that are provided with holes and recesses that are matched to the machine for fixing the tools in the machine and for fixing the cutting lines.
Die Werkzeuge müssen eine hohe Härte aufweisen und besonderen Anforderungen an die Planparallelität und an die Ebenheit entsprechen.The tools must have a high hardness and meet special requirements for plane parallelism and flatness.
Als Vormaterial für Stanz-und Gegenplatten werden vorzugsweise gehärtete Platten aus niedriglegierten oder mittellegierten Vergütungsstählen oder Werkzeugstählen wie z.B. DIN 50 CrMo 4, W.Nr. 1.7228, AISI 4150, mit einer Einsatzhärte von 45 -53 HRc verwendet. Erfahrungsgemäß weisen diese Stahllegierungen im gehärteten Zustand eine hohe Verschleißbeständigkeit auf.Hardened plates made of low-alloy or medium-alloy tempered steels or tool steels such as e.g. DIN 50 CrMo 4, W.Nr. 1.7228, AISI 4150, with a case hardness of 45-53 HRc. Experience shows that these steel alloys have a high wear resistance when hardened.
Diese Stahllegierungen sind nicht rostbeständig. Bei Bildung eines Feuchtigkeitsfilmes auf der Oberfläche, z.B. bei klimatisch bedingter Kondensation von Luftfeuchtigkeit bei Temperaturänderung, entsteht an der Oberfläche ein dünner, im Anfangsstadium punktförmiger, bräunlich gefärbter Rostbelag. Der Rostbelag würde das Produkt aus Papier, Pappe oder Wellpappe verunreinigen und muß daher durch eine zeitaufwendige Pflege vor Produktionsbeginn entfernt werden. Die Entfernung erfolgt je nach Stärke des Belages durch Abwischen oder Schleifen. Zusätzlich zum Aufwand für die Reinigung tritt bei ungünstigen Umweltbedingungen wie z.B. bei tropischem Klima, Standort in Meeresnähe oder bei Lagerung der Werkzeuge im Freien eine zusätzliche Verringerung der Lebensdauer ein.These steel alloys are not rustproof. When a moisture film is formed on the surface, e.g. in the case of climatic condensation of air humidity when the temperature changes, a thin, brownish-colored rust coating forms on the surface at the beginning. The rust covering would contaminate the product made of paper, cardboard or corrugated cardboard and must therefore be removed by a time-consuming care before the start of production. Depending on the thickness of the covering, it is removed by wiping or grinding. In addition to the effort required for cleaning, unfavorable environmental conditions such as in a tropical climate, location near the sea or when storing tools outdoors, an additional reduction in the service life.
Bei diesen Stanzplatten tritt noch eine besondere Korrosion, und zwar die Spannungsrißkorrosion, auf, da -wie leicht vorstellbar - besonders hohe Spannungen in den Platten aufgrund der Stanzdrücke eintreten. Ziel der vorliegenden Erfindung war eine Legierung aufzufinden, die einerseits den hohen mechanischen Beanspruchungen und anderseits den hohen Korrosionsbeanspruchungen bei Stanzplatten gewachsen ist.A particular corrosion occurs in these punching plates, namely stress corrosion cracking, because - as is easily imaginable - particularly high stresses occur in the plates due to the punching pressures. The aim of the present invention was to find an alloy which, on the one hand, is able to withstand the high mechanical stresses and, on the other hand, the high corrosion stresses on punching plates.
Die erfindungsgemäßen Chrom-Legierungen für Stanz-und Gegenplatten bestehen im wesentlichen darin, daß sie einen Gehalt in Gew.-% von
Rest Eisen und herstellungsbedingte Verunreinigungen aufweisen.Remaining iron and manufacturing-related impurities.
Es was durchaus überraschend, daß eine derartige Legierung sowohl den hohen mechanischen Anforderungen als auch den hohen korrosiven Beanspruchungen, insbesondere Spannungsrißkorrosionsbeanspruchungen gewachsen ist. Wie bekannt, unterliegen gerade an sich korrosionsbeständige Legierungen, insbesondere Chrom-Legierungen, spannungsrißkorrosionsmäßigen Angriffen, wobei die Einsatzhärte zwischen 45 und 53 HRc eingestellt werden kann.It was quite surprising that such an alloy can withstand both the high mechanical requirements and the high corrosive stresses, in particular stress corrosion cracking stresses. As is known, corrosion-resistant alloys, in particular chrome alloys, are subject to stress corrosion cracking, whereby the case hardness can be set between 45 and 53 HRc.
Eine weitere erfindungsgemäße Chrom-Legierung weist follgende Zusammensetzung in Gew.-% auf:
Rest Eisen und herstellungsbedingte Verunreinigungen, wobei eine derartige Legierung vergütbar ist.Remainder iron and manufacturing-related impurities, such an alloy being temperable.
Eine weitere erfindungsgemäße Chrom-Legierung für Stanz-und Gegenplatten besteht darin, daß sie in Gew.-% folgende Zusammensetzung aufweist:
Rest Eisen und herstellungsbedingte Verunreinigungen.Balance iron and manufacturing-related impurities.
Eine derartige Legierung stellt einen aushärtbaren Chrom-Stahl dar. Wie schwierig die Auswahl derartiger Legierungen ist, kann man bereits daran ermessen, daß bei der Durchführung von Stanzungen die Stanzung so genau durchgeführt werden muß, daß beispielsweise zwei Papiere, die übereinander liegen, derart gestanzt sein müssen, daß das obere, welches mit dem Schneidwerkzeug zuerst in Kontakt kommt, durchgestanzt ist, wohingegen das untere Papier keinerlei Schnittflächen, sondern nur Drucklinien aufweisen darf. Derartige Stanzungen sind beispielsweise für die Anfertigung von Klebeschildern und dgl. erforderlich, und daß auch nur geringste Unebenheiten in den Stanzplatten und Gegenplatten zu einem Produktionsausfall größten Ausmaßes führen können, ist evident, da derartige Stanzungen nicht durchgehend gleichmäßig sein können.Such an alloy is a hardenable chromium steel. How difficult it is to select such alloys can already be judged by the fact that when punching is carried out, the punching is carried out so precisely It must be performed that, for example, two papers lying one above the other must be punched such that the upper one, which comes into contact with the cutting tool first, is punched through, whereas the lower paper must not have any cut surfaces, but only pressure lines. Such die cuts are required, for example, for the production of adhesive labels and the like, and that even the slightest unevenness in the die plates and counter plates can lead to a loss of production of the greatest extent is evident, since such die cuts cannot be uniform throughout.
Im folgenden wird die Erfindung näher erläutert.The invention is explained in more detail below.
Vergleichsversuch mit Stanzplatten aus Stahl A, B, C, D, E, F und Stahl G, Analyse und Härte gemäß der Tabelle wurden auf einem Stanzautomaten mit 7000 Hüben pro Stunde durchgeführt. Jeweils nach 430 Stunden, d.h. nach 3,01 Mill. Hüben zeigten die Platten visuell im Schräglicht erkennbare leichte Eindrücke, die auf die hohen Druck-und Zugspannungen beim Stanzen zurückzuführen sind, entsprechend der Form der Stanzmesser. Ein Unterschied zwischen beiden Stanzplatten war nicht zu erkennen. Ein Korrosionsschaden, der auf Spannungsrißkorrosion zurückzuführen ist, war ebenfalls nicht zu bemerken.Comparative test with punching plates made of steel A, B, C, D, E, F and steel G, analysis and hardness according to the table were carried out on an automatic punching machine at 7000 strokes per hour. Every 430 hours, i.e. after 3.01 million strokes, the plates showed visually noticeable slight impressions, which are due to the high compressive and tensile stresses during punching, corresponding to the shape of the punching knife. There was no difference between the two punching plates. There was also no evidence of corrosion damage due to stress corrosion cracking.
Vergleichsversuch mit Proben aus den in der Tabelle angeführten Stählen in einer Klimakammer bei einer mittleren Temperatur von + 25°C. Durch Sättigung der Atmosphäre mit Wasserdampf wurde eine laufende Befeuchtung der Probenoberfläche erreicht.Comparison test with samples from the steels listed in the table in a climatic chamber at an average temperature of + 25 ° C. Saturation of the atmosphere with water vapor resulted in continuous moistening of the sample surface.
Die Proben aus Stahl A, B und C zeigten bereits nach 24 Stunden eine leichte braune Verfärbung an der Oberfläche. Nach einer Versuchsdauer von 4 Wochen zeigten diese Proben einen gleichmäßigen dünnen braunen Rostbelag. Nach dem Entfernen des Belages war an der Oberfläche dieser Proben eine örtliche Korrosion der Oberfläche mit der Lupe bei 4facher Vergrößerung erkennbar. Die Proben wären als Stanzplatten ohne Nacharbeit nicht mehr verwendbar gewesen.The samples from steel A, B and C already showed a slight brown discoloration on the surface after 24 hours. After a test period of 4 weeks, these samples showed an even, thin, brown rust coating. After removal of the coating, local corrosion of the surface with the magnifying glass at 4X magnification was visible on the surface of these samples. The samples would no longer have been usable as punching plates without reworking.
Die Proben aus Stahl D, E, F und G zeigten auch nach 4 Wochen in der Klimakammer keine Anrostung.
Claims (3)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT1529/85 | 1985-05-21 | ||
| AT1529/85A AT392485B (en) | 1985-05-21 | 1985-05-21 | MATERIAL FOR THE PRODUCTION OF PUNCHING AND COUNTERPLATES |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0207052A1 true EP0207052A1 (en) | 1986-12-30 |
| EP0207052B1 EP0207052B1 (en) | 1990-08-01 |
Family
ID=3515513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP86890138A Expired - Lifetime EP0207052B1 (en) | 1985-05-21 | 1986-05-14 | Alloy containing chromium for punching plates and counter plates |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4880481A (en) |
| EP (1) | EP0207052B1 (en) |
| JP (1) | JP2729790B2 (en) |
| KR (1) | KR930009982B1 (en) |
| AT (1) | AT392485B (en) |
| CA (1) | CA1279211C (en) |
| DE (1) | DE3673087D1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0338133A2 (en) * | 1988-04-20 | 1989-10-25 | Kawasaki Steel Corporation | Steels for hot working press tools |
| EP1164002A3 (en) * | 2000-06-16 | 2003-05-21 | Takeda Chemical Industries, Ltd. | Punch and die |
| CN109536854A (en) * | 2019-01-09 | 2019-03-29 | 河北五维航电科技股份有限公司 | A kind of manufacturing method of 600 DEG C of grades and following steam turbine blade root gasket |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5451288A (en) * | 1992-11-05 | 1995-09-19 | Smith; Larry | Heated die punch construction and control device |
| AT401387B (en) * | 1994-06-29 | 1996-08-26 | Boehler Ybbstalwerke | CORROSION RESISTANT ALLOY AND METHOD FOR PRODUCING CORROSION RESISTANT CUTTERS |
| AT402224B (en) * | 1994-11-04 | 1997-03-25 | Boehler Edelstahl | USE OF AN IRON BASED ALLOY AND PLUNGER PISTON AND PISTON RING |
| DE19924515A1 (en) * | 1999-05-28 | 2000-11-30 | Edelstahl Witten Krefeld Gmbh | Spray-compacted steel, process for its production and composite material |
| US8124007B2 (en) * | 2006-02-16 | 2012-02-28 | Stoody Company | Stainless steel weld overlays with enhanced wear resistance |
| US7754143B2 (en) * | 2008-04-15 | 2010-07-13 | L. E. Jones Company | Cobalt-rich wear resistant alloy and method of making and use thereof |
| DE102011003632A1 (en) * | 2011-02-04 | 2012-08-09 | Siemens Aktiengesellschaft | Turbo compressor impeller and method of making same |
| CN113174533A (en) * | 2021-04-13 | 2021-07-27 | 靖江市新万国标准件制造有限公司 | Corrosion-resistant and fatigue-resistant alloy steel for bolt and casting method |
Citations (4)
| 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 |
| DE2018938A1 (en) * | 1969-04-30 | 1970-11-19 | Schoeller-Bleckmann Stahlwerke Ag, Wien | Steel alloy for pressure plate sheet metal |
| DE2129959A1 (en) * | 1970-06-18 | 1971-12-23 | Uddeholms Ab | Steel alloy - for use in pulp manufacturing machinery |
| GB2071147A (en) * | 1980-02-28 | 1981-09-16 | Armco Inc | Copper and nitrogen containing austenitic stainless steel |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3355280A (en) * | 1965-06-25 | 1967-11-28 | Int Nickel Co | High strength, martensitic stainless steel |
| US3595643A (en) * | 1965-10-18 | 1971-07-27 | Sandvikens Jernverks Ab | Razor blade of a chromium containing steel |
| US3376780A (en) * | 1966-09-19 | 1968-04-09 | Armco Steel Corp | Stainless steel, products and method |
| GB1099017A (en) * | 1966-09-21 | 1968-01-10 | Sandvikens Jernverks Ab | Improvements in or relating to razor blades |
| US3574601A (en) * | 1968-11-27 | 1971-04-13 | Carpenter Technology Corp | Corrosion resistant alloy |
| US3582233A (en) * | 1969-04-24 | 1971-06-01 | Worthington Corp | Rotary compressor control system |
| JPS51140816A (en) * | 1975-05-30 | 1976-12-04 | Hitachi Metals Ltd | Alloy tool steel |
| JPS5773171A (en) * | 1980-10-24 | 1982-05-07 | Daido Steel Co Ltd | Tool steel |
| JPS5925924A (en) * | 1982-08-04 | 1984-02-10 | Plus Eng Co Ltd | Extruding pin for plastic |
| US4540424A (en) * | 1983-02-26 | 1985-09-10 | Kubota, Ltd. | Heat-resisting alloy for rolls for glass forming |
| AT377785B (en) * | 1983-06-28 | 1985-04-25 | Ver Edelstahlwerke Ag | CHROMED ALLOY |
| JPS6063356A (en) * | 1983-09-16 | 1985-04-11 | Daido Steel Co Ltd | Alloy tool steel |
-
1985
- 1985-05-21 AT AT1529/85A patent/AT392485B/en not_active IP Right Cessation
-
1986
- 1986-05-13 JP JP61107833A patent/JP2729790B2/en not_active Expired - Lifetime
- 1986-05-14 EP EP86890138A patent/EP0207052B1/en not_active Expired - Lifetime
- 1986-05-14 DE DE8686890138T patent/DE3673087D1/en not_active Expired - Lifetime
- 1986-05-15 KR KR1019860003786A patent/KR930009982B1/en not_active IP Right Cessation
- 1986-05-20 CA CA000509481A patent/CA1279211C/en not_active Expired - Lifetime
-
1988
- 1988-03-11 US US07/167,018 patent/US4880481A/en not_active Expired - Lifetime
Patent Citations (4)
| 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 |
| DE2018938A1 (en) * | 1969-04-30 | 1970-11-19 | Schoeller-Bleckmann Stahlwerke Ag, Wien | Steel alloy for pressure plate sheet metal |
| DE2129959A1 (en) * | 1970-06-18 | 1971-12-23 | Uddeholms Ab | Steel alloy - for use in pulp manufacturing machinery |
| GB2071147A (en) * | 1980-02-28 | 1981-09-16 | Armco Inc | Copper and nitrogen containing austenitic stainless steel |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0338133A2 (en) * | 1988-04-20 | 1989-10-25 | Kawasaki Steel Corporation | Steels for hot working press tools |
| EP0338133A3 (en) * | 1988-04-20 | 1992-03-18 | Kawasaki Steel Corporation | Steels for hot working press tools |
| EP1164002A3 (en) * | 2000-06-16 | 2003-05-21 | Takeda Chemical Industries, Ltd. | Punch and die |
| CN109536854A (en) * | 2019-01-09 | 2019-03-29 | 河北五维航电科技股份有限公司 | A kind of manufacturing method of 600 DEG C of grades and following steam turbine blade root gasket |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3673087D1 (en) | 1990-09-06 |
| CA1279211C (en) | 1991-01-22 |
| US4880481A (en) | 1989-11-14 |
| ATA152985A (en) | 1990-09-15 |
| KR860009153A (en) | 1986-12-20 |
| KR930009982B1 (en) | 1993-10-13 |
| JP2729790B2 (en) | 1998-03-18 |
| EP0207052B1 (en) | 1990-08-01 |
| JPS61266554A (en) | 1986-11-26 |
| AT392485B (en) | 1991-04-10 |
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