EP0499269A1 - Cored wire for inoculation - Google Patents
Cored wire for inoculation Download PDFInfo
- Publication number
- EP0499269A1 EP0499269A1 EP92102504A EP92102504A EP0499269A1 EP 0499269 A1 EP0499269 A1 EP 0499269A1 EP 92102504 A EP92102504 A EP 92102504A EP 92102504 A EP92102504 A EP 92102504A EP 0499269 A1 EP0499269 A1 EP 0499269A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnesium
- inoculation
- cast iron
- wire
- graphite
- 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
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/10—Making spheroidal graphite cast-iron
- C21C1/105—Nodularising additive agents
Definitions
- the invention relates to a seed wire for the production of cast iron with spheroidal graphite or vermicular graphite, which consists of a hollow wire containing powdered ferrosilicon with a sheath made of steel, copper, nickel or aluminum alloy.
- cast iron melts are treated with pure magnesium or magnesium master alloy in order to achieve a spherical or vermicular formation of the graphite in the cast iron matrix and thereby to influence the mechanical-technological properties of the workpieces cast therefrom in an advantageous manner.
- the aftertreatment of the cast iron melt by inoculation with special inoculant alloys is generally part of the production technology in order to meet the increased quality requirements, in particular ferrosilicon alloys (DIN 17560; company brochure: GfE Deutschen für Elektrometallurgie mbH, Düsseldorf, May 1989; Company prospectus: Metallgesellschaft AG, Frankfurt, Metallurgy and foundry technology, June 1979, pp. 10/11) are very frequently used vaccines.
- ferrosilicon alloys DIN 17560; company brochure: GfE Deutschen für Elektrometallurgie mbH, Düsseldorf, May 1989; Company prospectus: Metallgesellschaft AG, Frankfurt, Metallurgy and foundry technology, June 1979, pp. 10/11
- the germ-forming effect of the vaccine prevents the risk of carbide formation. The effect is based on the fact that the vaccine forms germs for graphite excretion.
- the solubility of the carbon is locally reduced by the high silicon content in the inoculant, so that the graphite excretion during the solidification is facilitated.
- Subcooling of the cast iron melt is significantly reduced, the number of eutectic cells or spherulites is increased and the structure is thus more fine-grained.
- the low addition of inoculants from about 0.05 to a maximum of 1.0% corresponds to a silicon absorption of the melt from 0.05 to 0.80%.
- the aim is generally to use small amounts of inoculants, but effective inoculants.
- the addition of inoculants improves mechanical and physical properties such as tensile strength, toughness and elongation.
- the addition of the inoculant should take place as shortly as possible before solidification, for example by using the form vaccination method. It is also known to accommodate powdery ferrosilicon alloys in comparatively thin-walled hollow wires made of steel, copper, nickel or aluminum alloys (company brochure: INFORM-vaccination wire, CHEMETALL GmbH, Frankfurt, March 1988).
- INFORM-vaccination wire CHEMETALL GmbH, Frankfurt, March 1988.
- the inoculation wire is wound into the cast iron melt at a constant speed or, when the melt is poured, it is fed into the pouring stream. Since the end of the inoculation wire to be melted is in the cast iron melt or pouring stream, there is an ideal, uniform addition and a controlled distribution of the inoculant in the melt.
- a decay effect also occurs in the treatment of the cast iron melt with magnesium or magnesium alloy, which is all the greater as the time interval between the treatment and the pouring of the melt is greater under operational conditions than after the treatment of the melt with a vaccine. For this reason, the treatment of the cast iron melt with magnesium or magnesium alloy must always be carried out with an excess of magnesium. This excess is only effective to a limited extent, since the decay effect is increased at the same time.
- the object of the invention is therefore to further improve the accuracy in the manufacture of products from cast iron with spheroidal graphite or vermicular graphite and to provide a seed wire of the construction described at the beginning, the filling causes a significant increase in the inoculation effect compared to inoculants made from ferrosilicon alloys and also reduces the decay effect associated with the magnesium treatment.
- a seed wire with a sheath made of steel, copper, nickel or aluminum and alloys thereof and ferrosilicon powder as the filling which is characterized in that the filling contains 1 to 50 vol .-% powdered magnesium silicide.
- the sheath of the hollow wire dissolves completely and releases the inoculant mixture which essentially consists of ferrosilicon alloy and magnesium silicide and forms the filling.
- the magnesium silicide used for filling the hollow wire according to the invention preferably has a composition of 55 to 63% by weight of magnesium and 36.6 to 45% by weight of silicon.
- the stoichiometric silicon content (36.6% by weight) of the magnesium silicide is not undercut.
- the magnesium silicide therefore preferably contains a small excess of silicon.
- a magnesium silicide is particularly preferably used, which is composed of 58 to 62% by weight of magnesium and 37 to 42% by weight of silicon.
- a content of rare earth metals of up to 1% by weight, preferably 0.5 to 0.75% by weight, in the magnesium silicide increases the spheroidal graphite-forming effect of the magnesium and the smooth course of the reaction.
- a calm, controlled course of the reaction is a necessary prerequisite for the safe setting of a desired residual magnesium content of the cast iron melt with a high magnesium yield at the same time.
- the filling of the seed wire can also contain 1 to 15% by weight of carbon and / or 1 to 50% by weight of silicon carbide.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Graft Or Block Polymers (AREA)
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
Abstract
Description
Die Erfindung betrifft einen Impfdraht zur Herstellung von Gußeisen mit Kugelgraphit bzw. Vermikulargraphit, der aus einem pulverförmiges Ferrosilizium enthaltenden Hohldraht mit einem Mantel aus Stahl, Kupfer, Nickel oder Aluminiumlegierung besteht.The invention relates to a seed wire for the production of cast iron with spheroidal graphite or vermicular graphite, which consists of a hollow wire containing powdered ferrosilicon with a sheath made of steel, copper, nickel or aluminum alloy.
Bekanntlich werden Gußeisenschmelzen mit Reinmagnesium bzw. Magnesiumvorlegierung behandelt, um eine kugelförmige bzw. vermikulare Ausbildung des Graphits in der Gußeisenmatrix zu erreichen und dadurch die mechanisch-technologischen Eigenschaften der daraus gegossenen Werkstücke in vorteilhafter Weise zu beeinflussen.As is known, cast iron melts are treated with pure magnesium or magnesium master alloy in order to achieve a spherical or vermicular formation of the graphite in the cast iron matrix and thereby to influence the mechanical-technological properties of the workpieces cast therefrom in an advantageous manner.
Bei der Herstellung von Gußeisen mit Kugelgraphit bzw. Vermikulargraphit ist die Nachbehandlung der Gußeisenschmelze durch Impfen mit besonderen Impflegierungen in aller Regel Bestandteil der Produktionstechnik, um den gestiegenen Qualitätsansprüchen gerecht zu werden, wobei insbesondere Ferrosiliziumlegierungen (DIN 17560; Firmenprospekt: GfE Gesellschaft für Elektrometallurgie mbH, Düsseldorf, Mai 1989; Firmenprospekt: Metallgesellschaft AG, Frankfurt, Metallurgie und Gießereitechnik, Juni 1979, S. 10/11) sehr häufig angewendete Impfmittel sind. Durch die keimbildende Wirkung des Impfmittels wird die Gefahr der Karbidbildung verhindert. Die Wirkung beruht darauf, daß das Impfmittel Keime für die Graphitausscheidung bildet. Ferner wird durch den hohen Siliziumgehalt im Impfmittel örtlich die Löslichkeit des Kohlenstoffs herabgesetzt, so daß die Graphitausscheidung bei der Erstarrung erleichtert wird. Eine Unterkühlung der Gußeisenschmelze wird deutlich verringert, die Anzahl der eutektischen Zellen bzw. Sphärolithen vergrößert und damit das Gefüge feinkörniger. Die geringe Impfmittelzugabe von etwa 0,05 bis maximal 1,0 % entspricht einer Silizium-Aufnahme der Schmelze von 0,05 bis 0,80 %. Zur Begrenzung der Silizium-Aufnahme sowie des Temperaturverlustes der Schmelze wird i.a. der Einsatz von geringen Impfmittelmengen, jedoch effektiven Impfmitteln angestrebt. Durch den Zusatz von Impfmitteln werden mechanische und physikalische Eigenschaften, wie Zugfestigkeit, Zähigkeit und Dehnung verbessert.In the production of cast iron with spheroidal graphite or vermicular graphite, the aftertreatment of the cast iron melt by inoculation with special inoculant alloys is generally part of the production technology in order to meet the increased quality requirements, in particular ferrosilicon alloys (DIN 17560; company brochure: GfE Gesellschaft für Elektrometallurgie mbH, Düsseldorf, May 1989; Company prospectus: Metallgesellschaft AG, Frankfurt, Metallurgy and foundry technology, June 1979, pp. 10/11) are very frequently used vaccines. The germ-forming effect of the vaccine prevents the risk of carbide formation. The effect is based on the fact that the vaccine forms germs for graphite excretion. Furthermore, the solubility of the carbon is locally reduced by the high silicon content in the inoculant, so that the graphite excretion during the solidification is facilitated. Subcooling of the cast iron melt is significantly reduced, the number of eutectic cells or spherulites is increased and the structure is thus more fine-grained. The low addition of inoculants from about 0.05 to a maximum of 1.0% corresponds to a silicon absorption of the melt from 0.05 to 0.80%. To limit the silicon absorption and the loss of temperature of the melt, the aim is generally to use small amounts of inoculants, but effective inoculants. The addition of inoculants improves mechanical and physical properties such as tensile strength, toughness and elongation.
Da die Impfwirksamkeit des Impfmittels einem zeitlichen Abklingeffekt unterliegt, sollte die Zugabe des Impfmittels so kurz wie möglich vor der Erstarrung erfolgen, beispielsweise durch Anwendung des Formimpf-Verfahrens. Es ist auch bekannt, pulverförmige Ferrosiliziumlegierungen in vergleichsweise dünnwandigen Hohldrähten aus Stahl, Kupfer, Nickel oder Aluminiumlegierungen unterzubringen (Firmenprospekt: INFORM-Impfdraht, CHEMETALL GmbH, Frankfurt, März 1988). Der Impfdraht wird mit gleichbleibender Geschwindigkeit in die Gußeisenschmelze gespult oder beim Vergießen der Schmelze in den Gießstrahl geführt. Da sich das abzuschmelzende Ende des Impfdrahtes in der Gußeisenschmelze bzw. -gießstrahl befindet, erfolgt eine ideale gleichmäßige Zugabe und eine kontrollierte Verteilung des Impfmittels in der Schmelze.Since the inoculation effectiveness of the inoculant is subject to a temporal decay effect, the addition of the inoculant should take place as shortly as possible before solidification, for example by using the form vaccination method. It is also known to accommodate powdery ferrosilicon alloys in comparatively thin-walled hollow wires made of steel, copper, nickel or aluminum alloys (company brochure: INFORM-vaccination wire, CHEMETALL GmbH, Frankfurt, March 1988). The inoculation wire is wound into the cast iron melt at a constant speed or, when the melt is poured, it is fed into the pouring stream. Since the end of the inoculation wire to be melted is in the cast iron melt or pouring stream, there is an ideal, uniform addition and a controlled distribution of the inoculant in the melt.
Ein Abklingeffekt tritt auch bei der Behandlung der Gußeisenschmelze mit Magnesium bzw. Magnesiumlegierung auf, der um so stärker ist als unter betrieblichen Bedingungen das Zeitintervall zwischen der Behandlung und dem Vergießen der Schmelze größer als nach der Behandlung der Schmelze mit einem Impfmittel ist. Aus diesem Grunde ist die Behandlung der Gußeisenschmelze mit Magnesium bzw. Magnesiumlegierung stets mit einem Überschuß an Magnesium durchzuführen. Dieser Überschuß ist nur bedingt wirksam, da der Abklingeffekt gleichzeitig verstärkt wird.A decay effect also occurs in the treatment of the cast iron melt with magnesium or magnesium alloy, which is all the greater as the time interval between the treatment and the pouring of the melt is greater under operational conditions than after the treatment of the melt with a vaccine. For this reason, the treatment of the cast iron melt with magnesium or magnesium alloy must always be carried out with an excess of magnesium. This excess is only effective to a limited extent, since the decay effect is increased at the same time.
Aufgabe der Erfindung ist es daher, die Treffsicherheit bei der Herstellung von Produkten aus Gußeisen mit Kugelgraphit oder Vermikulargraphit weiter zu verbessern und hierzu einen Impfdraht des eingangs beschriebenen Aufbaus bereitzustellen, dessen Füllung eine deutliche Vergrößerung des Impfeffekts im Vergleich zu Impfmitteln aus Ferrosiliziumlegierungen bewirkt und auch den mit der Magnesiumbehandlung verbundenen Abklingeffekt verringert.The object of the invention is therefore to further improve the accuracy in the manufacture of products from cast iron with spheroidal graphite or vermicular graphite and to provide a seed wire of the construction described at the beginning, the filling causes a significant increase in the inoculation effect compared to inoculants made from ferrosilicon alloys and also reduces the decay effect associated with the magnesium treatment.
Gelöst wird diese Aufgabe durch einen Impfdraht mit einem Mantel aus Stahl, Kupfer, Nickel oder Aluminium und Legierungen davon und Ferrosiliziumpulver als Füllung, der dadurch gekennzeichnet ist, daß die Füllung 1 bis 50 Vol.-% pulverförmiges Magnesiumsilizid enthält.This problem is solved by a seed wire with a sheath made of steel, copper, nickel or aluminum and alloys thereof and ferrosilicon powder as the filling, which is characterized in that the filling contains 1 to 50 vol .-% powdered magnesium silicide.
Beim Kontakt des erfindungsgemäßen Impfdrahtes mit der Gußeisenschmelze löst sich der Mantel des Hohldrahtes vollständig auf und setzt das im wesentlichen aus Ferrosiliziumlegierung und Magnesiumsilizid bestehende, die Füllung bildende Impfmittelgemisch frei. Dies führt zu einer beachtlichen Erhöhung der Zahl der Keime in der Basis-Gußeisenschmelze und verstärkt gleichzeitig die Wirkung des Magnesiums auf die Kugelgraphit- bzw. Vermikulargraphit-Bildung.When the inoculation wire according to the invention comes into contact with the cast iron melt, the sheath of the hollow wire dissolves completely and releases the inoculant mixture which essentially consists of ferrosilicon alloy and magnesium silicide and forms the filling. This leads to a considerable increase in the number of germs in the base cast iron melt and at the same time increases the effect of the magnesium on the spheroidal graphite or vermicular graphite formation.
In der technischen Praxis der Gießereien hat sich herausgestellt, daß ein Behandlungsmittel aus Magnesiumsilizid in der stöchiometrischen Zusammensetzung der Formel Mg₂Si (63,4 Gew-% Magnesium) bei der Behandlung von Gußeisenschmelzen wegen seines relativ hohen Magnesiumgehaltes einen unkontrolliert heftigen Reaktionsverlauf bewirken kann. Aus diesem Grunde hat das für die Füllung des erfindungsgemäßen Hohldrahts verwendete Magnesiumsilizid vorzugsweise eine Zusammensetzung von 55 bis 63 Gew.-% Magnesium und 36,6 bis 45 Gew.-% Silizium.In the technical practice of foundries, it has been found that a treatment agent made of magnesium silicide in the stoichiometric composition of the formula Mg₂Si (63.4% by weight magnesium) in the treatment of cast iron melts can cause an uncontrolled violent reaction course because of its relatively high magnesium content. For this reason, the magnesium silicide used for filling the hollow wire according to the invention preferably has a composition of 55 to 63% by weight of magnesium and 36.6 to 45% by weight of silicon.
Um einen ruhigen und kontrollierten Reaktionsverlauf zu erzielen, ist es vorteilhaft, wenn der stöchiometrische Siliziumgehalt (36,6 Gew.-%) des Magnesiumsilizids nicht unterschritten wird. Das Magnesiumsilizid enthält deshalb vorzugsweise einen geringen Überschuß an Silizium.In order to achieve a quiet and controlled course of the reaction, it is advantageous if the stoichiometric silicon content (36.6% by weight) of the magnesium silicide is not undercut. The magnesium silicide therefore preferably contains a small excess of silicon.
Besonders bevorzugt wird ein Magnesiumsilizid verwendet, das sich aus 58 bis 62 Gew.-% Magnesium und 37 bis 42 Gew.-% Silizium zusammensetzt.A magnesium silicide is particularly preferably used, which is composed of 58 to 62% by weight of magnesium and 37 to 42% by weight of silicon.
Ein Gehalt an Seltenerd-Metallen bis zu 1 Gew.-%, vorzugsweise 0,5 bis 0,75 Gew.-%, im Magnesiumsilizid verstärkt die kugelgraphitbildende Wirkung des Magnesiums sowie den ruhigen Reaktionsverlauf. Ein ruhiger kontrollierter Reaktionsverlauf ist eine notwendige Voraussetzung zur sicheren Einstellung eines gewünschten Restmagnesiumgehalts der Gußeisenschmelze bei gleichzeitig hoher Magnesiumausbeute.A content of rare earth metals of up to 1% by weight, preferably 0.5 to 0.75% by weight, in the magnesium silicide increases the spheroidal graphite-forming effect of the magnesium and the smooth course of the reaction. A calm, controlled course of the reaction is a necessary prerequisite for the safe setting of a desired residual magnesium content of the cast iron melt with a high magnesium yield at the same time.
Die Füllung des Impfdrahtes kann außerdem 1 bis 15 Gew.-% Kohlenstoff und/oder 1 bis 50 Gew.-% Siliziumcarbid enthalten.The filling of the seed wire can also contain 1 to 15% by weight of carbon and / or 1 to 50% by weight of silicon carbide.
Die Erfindung wird nachfolgend unter Bezugnahme auf die Zeichnung beispielsweise näher erläutert.The invention is explained in more detail below with reference to the drawing, for example.
In der Zeichnung stellen dar:
Figur 1- das Gefüge von Gußeisen mit Kugelgraphit in perlitischer grauer Grundmasse, das in herkömmlicher Weise mit mit FeSi-Legierung gefülltem Impfdraht behandelt worden ist, in 100-facher Vergrößerung.
- Figur 2
- das Gefüge von Gußeisen mit Kugelgraphit in perlitischer grauer Grundmasse, das mit mit einem Gemisch aus FeSi-Legierung und Magnesiumsilizid gefülltem Impfdraht gemäß Erfindung behandelt worden ist, in 100-facher Vergrößerung.
- Figure 1
- the structure of spheroidal graphite cast iron in pearlitic gray matrix, which has been treated in a conventional manner with inoculation wire filled with FeSi alloy, in 100-fold magnification.
- Figure 2
- the structure of spheroidal graphite cast iron in pearlitic gray matrix, which has been treated with an inoculation wire filled with a mixture of FeSi alloy and magnesium silicide according to the invention, in 100-fold magnification.
Ein Vergleich der in Figur 1 und Figur 2 wiedergegebenen Gefügebilder zeigt augenfällig die kornfeinende Wirkung von Magnesiumsilizid gemäß Figur 2. Die quantitative Gefügeanalyse der Gefüge von Gußeisen mit Kugelgraphit nach Figur 1 und Figur 2 ergibt, daß sich die Anzahl der als schwarze Punkte erkennbaren Sphärolithen von 511/mm² gemäß Figur 1 auf 1256/mm² gemäß Figur 2 mehr als verdoppelt hat, wobei, wie Figur 2 zeigt, daß die einzelnen Sphärolithen des mit dem erfindungsgemäß ausgebildeten Impfdraht behandelten Gußeisens mit Kugelgraphit deutlich kleiner sind.
- Figur 3
- stellt diesen Zusammenhang in einem Balkendiagramm dar, das die Abhängigkeit des mittleren Durchmessers der Sphärolithen von ihrer relativen Häufigkeit zeigt. Es ergibt sich eine deutliche Verschiebung der Durchmesser der Spärolithen des mit dem erfindungsgemäßen Impfdraht behandelten Gußeisens mit Kugelgraphit zu kleineren Durchmessern hin.
- Figur 4
- zeigt ein Balkendiagramm, aus dem hervorgeht, daß bei dem mit erfindungsgemäßem Fülldraht behandelten Gußeisen mit Kugelgraphit auch die Nodularität der einzelnen Spärolithen deutlich zunimmt. Das bedeutet, daß die Tendenz zu einer Entartung der Spärolithen, charakterisiert durch die Anzahl der Spärolithen mit geringer Nodularität, entsprechend deutlich abnimmt.
- Figure 3
- shows this relationship in a bar chart, which shows the dependence of the mean diameter of the spherulites on their relative frequency. There is a clear shift in the diameter of the spherulites of the cast iron with spheroidal graphite treated with the inoculation wire according to the invention towards smaller diameters.
- Figure 4
- shows a bar chart from which it emerges that in the cast iron with spheroidal graphite treated with cored wire according to the invention, the nodularity of the individual sparoliths also increases significantly. This means that the tendency to degenerate the spherulites, characterized by the number of spherulites with low nodularity, correspondingly decreases significantly.
Claims (6)
dadurch gekennzeichnet,
daß die Füllung 1 bis 50 Vol.-% pulverförmiges Magnesiumsilizid enthält.Inoculation wire, consisting of a hollow wire containing powdered ferrosilicon as a filling with a sheath made of steel, copper, nickel or aluminum alloy, for the production of cast iron with spheroidal graphite or vermicular graphite,
characterized,
that the filling contains 1 to 50 vol .-% powdered magnesium silicide.
dadurch gekennzeichnet,
daß das Magnesiumsilizid aus 55 bis 63 Gew.-% Magnesium und 36 bis 45 Gew.-% Silizium zusammengesetzt ist.Vaccination wire according to claim 1,
characterized,
that the magnesium silicide is composed of 55 to 63 wt .-% magnesium and 36 to 45 wt .-% silicon.
dadurch gekennzeichnet,
daß das Magnesiumsilizid aus 58 bis 62 Gew.-% Magnesium und 37 bis 42 Gew.-% Silizium zusammengesetzt ist.Inoculation wire according to claim 2,
characterized,
that the magnesium silicide is composed of 58 to 62 wt .-% magnesium and 37 to 42 wt .-% silicon.
dadurch gekennzeichnet,
daß das Magnesiumsilizid 0,01 bis 1 Gew.-%, vorzugsweise 0,50 bis 0,75 Gew.-% Seltenerd-Metall enthält.Inoculation wire according to one of claims 1 to 3,
characterized,
that the magnesium silicide contains 0.01 to 1 wt .-%, preferably 0.50 to 0.75 wt .-% rare earth metal.
dadurch gekennzeichnet,
daß die Füllung auch 1 bis 15 % Kohlenstoff und/oder 1 bis 50 % Siliziumcarbid enthält.Inoculation wire according to one of claims 1 to 4,
characterized,
that the filling also contains 1 to 15% carbon and / or 1 to 50% silicon carbide.
dadurch gekennzeichnet,
daß man Impfdraht nach einem der Ansprüche 1 bis 5 einer Gußeisenschmelze so kurz wie möglich vor der Erstarrung zusetzt.Process for the production of spheroidal graphite or vermicular graphite cast iron,
characterized,
that seed wire according to one of claims 1 to 5 is added to a cast iron melt as shortly as possible before solidification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT92102504T ATE101656T1 (en) | 1991-02-14 | 1992-02-14 | VACUATION WIRE. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4104562A DE4104562A1 (en) | 1991-02-14 | 1991-02-14 | VACCINE WIRE |
| DE4104562 | 1991-02-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0499269A1 true EP0499269A1 (en) | 1992-08-19 |
| EP0499269B1 EP0499269B1 (en) | 1994-02-16 |
Family
ID=6425063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92102504A Expired - Lifetime EP0499269B1 (en) | 1991-02-14 | 1992-02-14 | Cored wire for inoculation |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5205856A (en) |
| EP (1) | EP0499269B1 (en) |
| AT (1) | ATE101656T1 (en) |
| CA (1) | CA2061164A1 (en) |
| DE (2) | DE4104562A1 (en) |
| DK (1) | DK0499269T3 (en) |
| ES (1) | ES2050546T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995011318A1 (en) * | 1993-10-21 | 1995-04-27 | Tovarischestvo S Ogranichennoi Otvetstvennostju Kompania 'sredny Ural' | Process for obtaining cast iron |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2637907B2 (en) * | 1992-09-30 | 1997-08-06 | 株式会社神戸製鋼所 | Flux cored wire |
| DE19755803A1 (en) * | 1997-12-16 | 1999-07-01 | Winter Fritz Eisengiesserei | Deoxidized cast iron melt is inoculated with a mixture of magnesium and silicon |
| DE10026546B4 (en) * | 2000-05-23 | 2004-09-02 | Heppes, Frank, Dipl.-Ing. | Casting cores and methods for creating voids in castings |
| MC200112A1 (en) * | 2007-12-05 | 2008-07-02 | Luca Cattaneo | A method of modifying the graphitic phase of the melting of the lamellar form to the spheroidal or vermicular form through an animated monophylle |
| US8828117B2 (en) | 2010-07-29 | 2014-09-09 | Gregory L. Dressel | Composition and process for improved efficiency in steel making |
| JP6838603B2 (en) | 2016-03-24 | 2021-03-03 | 日立金属株式会社 | Method for manufacturing spheroidal graphite cast iron, cast articles made of spheroidal graphite cast iron, structural parts for automobiles, and cast articles made of spheroidal graphite cast iron. |
| DE102020004163A1 (en) | 2020-07-10 | 2022-01-13 | Combicore GmbH | Process for the production and use of casting cores for all casting processes, in particular die casting, as well as casting cores produced using this process and intended for the creation of defined cavities in cast parts |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3056190A (en) * | 1960-04-06 | 1962-10-02 | Dow Chemical Co | Composite metal article and method of making same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2881068A (en) * | 1952-04-28 | 1959-04-07 | Wargons Ab | Method of treating a ferrous melt with a porous sintered metal body impregnated with a treating agent |
| DE1458427A1 (en) * | 1963-09-30 | 1969-02-20 | Kazuji Kusaka | Process for the production of a cast iron containing magnesium with spheroidal graphite and a low slag content |
| JPS5112443B1 (en) * | 1965-12-13 | 1976-04-20 | ||
| US4698095A (en) * | 1972-06-30 | 1987-10-06 | Tohei Ototani | Composite calcium clads for treating molten iron |
| US4035892A (en) * | 1972-06-30 | 1977-07-19 | Tohei Ototani | Composite calcium clad material for treating molten metals |
-
1991
- 1991-02-14 DE DE4104562A patent/DE4104562A1/en not_active Withdrawn
-
1992
- 1992-02-12 US US07/834,430 patent/US5205856A/en not_active Expired - Fee Related
- 1992-02-13 CA CA002061164A patent/CA2061164A1/en not_active Abandoned
- 1992-02-14 AT AT92102504T patent/ATE101656T1/en not_active IP Right Cessation
- 1992-02-14 DE DE92102504T patent/DE59200065D1/en not_active Expired - Fee Related
- 1992-02-14 DK DK92102504.5T patent/DK0499269T3/en active
- 1992-02-14 ES ES92102504T patent/ES2050546T3/en not_active Expired - Lifetime
- 1992-02-14 EP EP92102504A patent/EP0499269B1/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3056190A (en) * | 1960-04-06 | 1962-10-02 | Dow Chemical Co | Composite metal article and method of making same |
Non-Patent Citations (3)
| Title |
|---|
| FONDERIE, FONDEUR D'AUJOURD'HUI. Nr. 70, Dezember 1987, PARIS FR Seiten 49 - 53; M.HECHT: 'Le traitement de la fonte au moyen de fils fourrés.' * |
| GIESSEREI. Bd. 76, Nr. 3, 6. Februar 1989, DUSSELDORF DE Seiten 69 - 73; K.J.BEST,FRANKFURT: 'Behandlung von Gusseisenschmelzen mit Magnesiumbehandlungsdraht und Impfdraht zur Erzeugung von Serienteilen aus Gusseisen mit Kugelgraphit und Vermiculargraphit.' * |
| GIESSEREI-PRAXIS. Nr. 21, 6. November 1983, BERLIN DE Seiten 313 - 320; K.J.BEST: 'Metallurgische Behandlung von Gusseisenschmelzen mittels Impfdraht und Magnesiumbehandlungsdraht.' * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995011318A1 (en) * | 1993-10-21 | 1995-04-27 | Tovarischestvo S Ogranichennoi Otvetstvennostju Kompania 'sredny Ural' | Process for obtaining cast iron |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4104562A1 (en) | 1992-08-20 |
| ATE101656T1 (en) | 1994-03-15 |
| ES2050546T3 (en) | 1994-05-16 |
| DK0499269T3 (en) | 1994-03-21 |
| CA2061164A1 (en) | 1992-08-15 |
| US5205856A (en) | 1993-04-27 |
| EP0499269B1 (en) | 1994-02-16 |
| DE59200065D1 (en) | 1994-03-24 |
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