EP0335012A1 - Method for continuously producing a wear resistant metal-hard material composite by centrifugal casting - Google Patents
Method for continuously producing a wear resistant metal-hard material composite by centrifugal casting Download PDFInfo
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- EP0335012A1 EP0335012A1 EP88121821A EP88121821A EP0335012A1 EP 0335012 A1 EP0335012 A1 EP 0335012A1 EP 88121821 A EP88121821 A EP 88121821A EP 88121821 A EP88121821 A EP 88121821A EP 0335012 A1 EP0335012 A1 EP 0335012A1
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- centrifugal casting
- casting
- hard materials
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- molten metal
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- 239000000463 material Substances 0.000 title claims abstract description 33
- 238000009750 centrifugal casting Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims description 16
- 239000002131 composite material Substances 0.000 title abstract description 3
- 229910052751 metal Inorganic materials 0.000 claims abstract description 36
- 239000002184 metal Substances 0.000 claims abstract description 35
- 238000005266 casting Methods 0.000 claims abstract description 21
- 239000007787 solid Substances 0.000 claims abstract description 10
- 150000001247 metal acetylides Chemical class 0.000 claims abstract description 9
- 150000002739 metals Chemical class 0.000 claims abstract description 4
- 239000011230 binding agent Substances 0.000 claims abstract description 3
- 238000005054 agglomeration Methods 0.000 claims abstract 2
- 230000002776 aggregation Effects 0.000 claims abstract 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- 239000002905 metal composite material Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000010924 continuous production Methods 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910052715 tantalum Inorganic materials 0.000 claims description 4
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 claims description 3
- 229910033181 TiB2 Inorganic materials 0.000 claims description 3
- 229910052580 B4C Inorganic materials 0.000 claims description 2
- 229910000531 Co alloy Inorganic materials 0.000 claims description 2
- 229910001060 Gray iron Inorganic materials 0.000 claims description 2
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 229910034327 TiC Inorganic materials 0.000 claims description 2
- 229910009001 W2C Inorganic materials 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- 239000010941 cobalt Substances 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- 229910052593 corundum Inorganic materials 0.000 claims description 2
- -1 ferrous metals Chemical class 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 229910052758 niobium Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 229910003468 tantalcarbide Inorganic materials 0.000 claims description 2
- 229910052720 vanadium Inorganic materials 0.000 claims description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- 239000007769 metal material Substances 0.000 abstract 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/08—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal
Definitions
- the invention relates to a method for the continuous production of a wear-resistant hard metal composite by centrifugal casting.
- a disadvantage of these procedures is, in particular, that when hard materials are added to the ladle filled with molten metal, a large part of the hard materials dissolves due to the long action time of the molten metal on the solid particles and the exchange of substances supported by stirring, for example, and therefore does not act as a wear protection or an additional time-consuming work step is associated with the sprinkling of the hard materials onto a dough or liquid centrifugal casting layer.
- hard materials of low density such as B4C, TiB2, TiC, although these have a much higher hardness than e.g. Tungsten carbide, do not use to reinforce the mold wall facing outer surface of the casting.
- these hard materials accumulate preferentially on the inside or in the core area of the casting and are therefore ineffective with regard to the wear protection of the outer surface of cast solid bodies.
- the present invention aims to overcome the disadvantages mentioned.
- the invention has for its object to develop a method for the continuous production of a wear-resistant hard metal composite by centrifugal casting (vertical and horizontal centrifugal casting), which in particular in a cost-effective manner a simple parameter control for reproducible generation of such a composite for reinforcing large rotationally symmetrical components against Wear also possible with the use of metallic and non-metallic hard materials of high hardness and low density.
- This object is achieved in that solid powdery and / or granular synthetic metallic and / or non-metallic hard materials during the pouring of the molten metal into a centrifugal casting mold rotating around its axis of symmetry with the aid of a conveyor device using an inert conveying gas temporarily into the metal stream flowing into the mold be injected.
- the duration of stay of the hard materials in the molten metal before entering the mold is reduced and their discharge increased
- the distribution and depth of storage of the hard materials can be adjusted in a simple, reproducible manner by choosing the time and the duration of the injection.
- the casting process is continued continuously with pure metal melt to complete the casting.
- Metal melts composed of alloyed or unalloyed steel or gray cast iron, pure non-ferrous metals such as cobalt and nickel or of a nickel or cobalt-based alloy are preferably suitable for the application of synthetic hard materials.
- carbides of the elements Mo, Nb, Ta, V, W and Zr are advantageous, in particular because of their high density and low dissolution rate. Due to the high centrifugal acceleration occurring during centrifugal casting, these are transported radially through the melt towards the mold wall and accumulate in the cast body in front of the outer processing layer.
- very hard and only slowly soluble borides, oxides and carbides of low density such as TiB2, Al2O3, TiO2, B4C, TiC
- metals and / or high density carbides such as Co, Ni, Ta, W, TaC, W2C, WC, are connected.
- the advantages achieved by the invention are, in particular, that the casting process for producing a hard material-metal composite takes place in a continuous and simple, inexpensive manner and that the distribution, composition, concentration and depth of the hard materials in the centrifugal casting body can be adjusted reproducibly.
- FIG. 1 shows the diagrammatic representation of the method according to the invention for the continuous production of a wear-resistant hard material-metal composite by centrifugal casting (here: horizontal centrifugal casting).
- the centrifugal casting mold 1 is first set in rotation by its drive rollers 2 about its axis of symmetry. After reaching a sufficiently high rotational speed for the uniform distribution of the molten metal in the centrifugal casting mold 1, after the usual application of a size to the mold wall (not shown in the figure), pure molten metal 3 from the ladle 4 through the casting device 5 into the cold centrifugal casting mold 1 poured. Due to the high heat dissipation caused by the cold centrifugal casting mold 1, an approx. 5 - 15 mm thick processing layer 6 solidifies immediately of the casting, the machining of this layer, the manufacturing tolerances attributable to the casting process and the mold contour can be compensated for.
- solid powdery and / or granular hard materials 9 are now passed through an opening 10 in the casting device 5 with an inert protective gas as carrier or conveying gas 8, preferably argon the vicinity of the centrifugal casting mold 1 into which the metal stream flowing through the casting device 5 is injected.
- an inert protective gas as carrier or conveying gas 8 preferably argon the vicinity of the centrifugal casting mold 1 into which the metal stream flowing through the casting device 5 is injected.
- the hard materials are metered in a simple manner by adjusting the carrier gas pressure.
- the casting process is continued by interrupting the powder supply with pure metal melt 12 until the casting is finished.
- FIG. 2 shows an example of a cross section through a roller cast according to the developed method with a processing layer made of cast steel 13, a wear-resistant layer 14 made of cast steel with embedded synthetic hard materials 15 and a core made of cast steel 16.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Centrifugal Separators (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum kontinuierlichen Herstellen eines verschleißbeständigen Hartstoff-Metallverbundes durch Schleudergießen.The invention relates to a method for the continuous production of a wear-resistant hard metal composite by centrifugal casting.
Es ist bekannt, rotationssymmetrische Gußkörper durch Schleudergießen herzustellen, die in unterschiedlichen Bereichen pulverförmige oder körnige Hartstoffe aufweisen können (deutsche Patentschriften Nr. 891324 und Nr. 2254705).It is known to produce rotationally symmetrical cast bodies by centrifugal casting, which can have powdery or granular hard materials in different areas (German patent specifications No. 891324 and No. 2254705).
Dabei ist es allerdingt nötig, entweder zunächst feste Hartstoffe in eine Metallschmelze zuzugeben und anschließend die Hartstoffe gemeinsam mit der Metallschmelze in eine Schleudergußkokille einzugießen (deutsche Patentschrift Nr. 891324) oder erst nach dem Eingießen der Metallschmelze in die Schleudergußkokille Hartstoffe auf die Innenoberfläche der Schleudergußlage aufzustreuen (deutsche Patentschrift Nr. 2254705).However, it is absolutely necessary to either first add solid hard materials into a molten metal and then pour the hard materials together with the molten metal into a centrifugal casting mold (German Patent No. 891324) or to sprinkle hard materials onto the inner surface of the centrifugal casting layer only after the molten metal has been poured into the centrifugal casting mold (German Patent No. 2254705).
Nachteilig bei diesen Verfahrensweisen ist insbesondere, daß beim Zugeben von Hartstoffen in die mit Metallschmelze gefüllte Gießpfanne aufgrund der langen Einwirkzeit der Metallschmelze auf die Feststoffpartikel und des durch z.B. Rühren unterstützten Stofftausches ein großer Teil der Hartstoffe in Lösung geht und daher nicht als Verschleißschutz zur Wirkung kommt oder mit dem Aufstreuen der Hartstoffe auf eine teigige oder flüssige Schleudergußlage ein zusätzlicher zeitintensiver Arbeitsschritt verbunden ist.A disadvantage of these procedures is, in particular, that when hard materials are added to the ladle filled with molten metal, a large part of the hard materials dissolves due to the long action time of the molten metal on the solid particles and the exchange of substances supported by stirring, for example, and therefore does not act as a wear protection or an additional time-consuming work step is associated with the sprinkling of the hard materials onto a dough or liquid centrifugal casting layer.
Zudem ist bei diesen beiden Verfahrensweisen eine aufwendige Parameteroptimierung erforderlich, um die Verteilung und Tiefe der Hartstoffe in dem Gußstück reproduzierbar einstellen zu können.In addition, these two procedures require complex parameter optimization in order to be able to reproducibly adjust the distribution and depth of the hard materials in the casting.
Hierdurch bedingt können insbesondere Fertigungstoleranzen bei der Herstellung von großen und teuren Bauteilen, wie z.B. Walzen und Rollen, nicht sicher eingehalten werden.This can result in particular manufacturing tolerances in the manufacture of large and expensive components, such as Rolls and rolls, are not adhered to safely.
Daher sind die bekannten Verfahrensweisen zum Erzeugen eines Hartstoff-Metallverbundes für große Präzisionsteile nicht geeignet.The known methods for producing a hard material-metal composite are therefore not suitable for large precision parts.
Ferner können zur verschleißfesten Panzerung der Kokillenwand zugekehrten Außenfläche von rotationssymmetrischen Gußkörpern nach dem Schleudergußverfahren nur Hartstoffe sehr hoher Dichte, wie z.B. Wolframkarbid, die infolge der beim Schleudergießen einwirkenden Zentrifugalkraft radial durch die Schmelze in Richtung Kokillenwand transportiert werden, zum Einsatz kommen.Furthermore, for wear-resistant armoring of the mold wall facing the outer surface of rotationally symmetrical cast bodies using the centrifugal casting method, only hard materials of very high density, such as Tungsten carbide, which is transported radially through the melt towards the mold wall due to the centrifugal force acting during centrifugal casting, is used.
Demgegenüber lassen sich Hartstoffe geringer Dichte, wie z.B. B₄C, TiB₂, TiC, obwohl diese eine wesentlich höhere Härte als z.B. Wolframkarbid aufweisen, nicht zur Bewehrung der Kokillenwand zugekehrten äußeren Oberfläche des Gußteils verwenden. Diese Hartstoffe reichern sich infolge der Strömungsbedingungen der Metallschmelze in der Schleudergußkokille bevorzugt auf der Innenseite bzw. im Kernbereich des Gußteils an und sind deshalb hinsichtlich des Verschleißschutzes der Außenfläche von gegossenen Vollkörpern ohne Wirkung.In contrast, hard materials of low density, such as B₄C, TiB₂, TiC, although these have a much higher hardness than e.g. Tungsten carbide, do not use to reinforce the mold wall facing outer surface of the casting. As a result of the flow conditions of the molten metal in the centrifugal casting mold, these hard materials accumulate preferentially on the inside or in the core area of the casting and are therefore ineffective with regard to the wear protection of the outer surface of cast solid bodies.
Die vorliegende Erfindung bezweckt, die genannten Nachteile zu beseitigen.The present invention aims to overcome the disadvantages mentioned.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum kontinuierlichen Herstellen eines verschleißbeständigen Hartstoff-Metallverbundes durch Schleudergießen (Vertikal- und Horizontal-Schleuderguß) zu entwickeln, welches insbesondere in kostengünstiger Weise eine einfache Parametersteuerung zum reproduzierbaren Erzeugen eines derartigen Verbundes zur Bewehrung großer rotationssymmetrischer Bauteile gegen Verschleiß auch unter Verwendung von metallischen- und nichtmetallischen Hartstoffen hoher Härte und niedriger Dichte ermöglicht.The invention has for its object to develop a method for the continuous production of a wear-resistant hard metal composite by centrifugal casting (vertical and horizontal centrifugal casting), which in particular in a cost-effective manner a simple parameter control for reproducible generation of such a composite for reinforcing large rotationally symmetrical components against Wear also possible with the use of metallic and non-metallic hard materials of high hardness and low density.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß feste pulverförmige und/oder körnige synthetische metallische und/oder nichtmetallische Hartstoffe während des Eingießens der Metallschmelze in eine um ihre Symmetrieachse rotierende Schleudergußkokille mit Hilfe einer Fördereinrichtung unter Verwendung eines inerten Fördergases zeitweise in den in die Kokille einfließenden Metallstroms injiziert werden.This object is achieved in that solid powdery and / or granular synthetic metallic and / or non-metallic hard materials during the pouring of the molten metal into a centrifugal casting mold rotating around its axis of symmetry with the aid of a conveyor device using an inert conveying gas temporarily into the metal stream flowing into the mold be injected.
Hierdurch wird einerseits die Aufenthaltsdauer der Hartstoffe in der Metallschmelze vor dem Einlaufen in die Kokille verringert und ihr Ausbringen erhöht, andererseits kann die Verteilung und Einlagerungstiefe der Hartstoffe in einfacher Weise, reproduzierbar durch Wahl des Zeitpunkts sowie der Zeitdauer der Injektion eingestellt werden.In this way, on the one hand, the duration of stay of the hard materials in the molten metal before entering the mold is reduced and their discharge increased, on the other hand, the distribution and depth of storage of the hard materials can be adjusted in a simple, reproducible manner by choosing the time and the duration of the injection.
Da insbesondere bei großen durch Schleudergießen hergestellten Bauteilen, um die mit dem Gießvorgang und der Kokillenkontur verbundenen Fertigungstoleranzen auszugleichen, eine aufwendige Nachbearbeitung der Gußstücke erforderlich ist und diese bei hohen Hartstoffanteilen durch kostenintensives Schleifen erfolgen muß, wird zum Ausgleich der Fertigungstoleranzen vor der Zugabe von festen synthetischen Hartstoffen in den in die Kokille einfließenden Metallstrom zunächst eine spanbare Bearbeitungsschicht gegossen.Since, in particular in the case of large components produced by centrifugal casting, in order to compensate for the manufacturing tolerances associated with the casting process and the mold contour, an elaborate reworking of the castings is necessary and this has to be carried out with high hard material proportions by expensive grinding, to compensate for the manufacturing tolerances before the addition of solid synthetic Hard materials are first cast into a machinable processing layer in the metal stream flowing into the mold.
Nach dem unmittelbar erfolgenden Eingießen der mit synthetischen Hartstoffen beaufschlagten Metallschmelze in die Schleudergußkokille wird zur Fertigstellung des Gußkörpers der Gießvorgang kontinuierlich mit reiner Metallschmelze fortgesetzt.After the immediate pouring of the metal melt charged with synthetic hard materials into the centrifugal casting mold, the casting process is continued continuously with pure metal melt to complete the casting.
Zur Beaufschlagung mit synthetischen Hartstoffen eignen sich vorzugsweise Metallschmelzen, die aus legiertem oder unlegiertem Stahl- oder Grauguß, reinen Nichteisenmetallen, wie Cobalt und Nickel oder aus einer Nickel- oder Cobaltbasislegierung bestehen.Metal melts composed of alloyed or unalloyed steel or gray cast iron, pure non-ferrous metals such as cobalt and nickel or of a nickel or cobalt-based alloy are preferably suitable for the application of synthetic hard materials.
Ferner ist die Injektion von Karbiden der Elemente Mo, Nb, Ta, V, W und Zr in die Metallschmelze, insbesondere wegen ihrer hohen Dichte und niedrigen Lösungsgeschwindigkeit, vorteilhaft. Diese werden aufgrund der beim Schleudergießen auftretenden hohen Zentrifugalbeschleunigung radial durch die Schmelze in Richtung Kokillenwand transportiert und reichern sich im Gußkörper vor der äußeren Bearbeitungsschicht an. Zur Injektion der in die Kokille einströmenden Metallschmelze können auch sehr harte und in Metallschmelzen nur langsam lösliche Boride, Oxide und Karbide geringer Dichte, wie TiB₂, Al₂O₃, TiO₂, B₄C, TiC verwendet werden, die unter Zuhilfenahme eines anorganischen oder organischen Bindemittels durch Aggromeration mit Metallen und/oder Karbiden hoher Dichte, wie Co, Ni, Ta, W, TaC, W₂C, WC, verbunden sind.Furthermore, the injection of carbides of the elements Mo, Nb, Ta, V, W and Zr into the molten metal is advantageous, in particular because of their high density and low dissolution rate. Due to the high centrifugal acceleration occurring during centrifugal casting, these are transported radially through the melt towards the mold wall and accumulate in the cast body in front of the outer processing layer. For the injection of the molten metal flowing into the mold, very hard and only slowly soluble borides, oxides and carbides of low density, such as TiB₂, Al₂O₃, TiO₂, B₄C, TiC, can be used, which with the aid of an inorganic or organic binder by aggromeration with Metals and / or high density carbides, such as Co, Ni, Ta, W, TaC, W₂C, WC, are connected.
Aufgrund der Anbindung von Hartstoffen niedriger Dichte an metallische Elemente und/oder Karbide hoher Dichte werden diese "beschwert" und lassen sich zur Bewehrung der Kokillenwand gegenüberliegenden äußeren Oberfläche des Gußkörpers verwenden. Ferner können, durch den Einsatz derartig vorbehandelter Hartstoffe, deren Einbindung im erstarrten Gußteil verbessert und verschleißfeste Hartstoff-Mischphasen während des Gießvorganges erzeugt werden.Due to the binding of hard materials of low density to metallic elements and / or carbides of high density, these are "weighed down" and can be used to reinforce the outer surface of the cast body opposite the mold wall. Furthermore, by using such pretreated hard materials, their integration in the solidified casting can be improved and wear-resistant hard material mixing phases can be generated during the casting process.
Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß der Gießprozeß zur Herstellung eines Hartstoff-Metallverbundes in kontinuierlicher und einfacher, kostengünstiger Weise erfolgt sowie die Verteilung, Zusammensetzung, Konzentration und Tiefe der Hartstoffe im Schleudergußkörper reproduzierbar eingestellt werden kann.The advantages achieved by the invention are, in particular, that the casting process for producing a hard material-metal composite takes place in a continuous and simple, inexpensive manner and that the distribution, composition, concentration and depth of the hard materials in the centrifugal casting body can be adjusted reproducibly.
Hierdurch lassen sich u.a. der Aufwand zur Fertigbearbeitung des Gußteiles erheblich reduzieren und die Eigenschaften des Hartstoff-Metallverbundes gezielt beeinflussen. Daher ist erstmals in wirtschaftlicher und reproduzierbarer Weise das Herstellen eines verschleißbeständigen Hartstoff-Metallverbundes im Schleudergußverfahren (Vertikal- und Horizontal-Schleuderguß) zur verschleißfesten Panzerung von großen und teuren Bauteilen, wie z.B. Walzen, Rollen, möglich. Außerdem können auch sehr harte Boride, Oxide und Karbide zur Bewehrung der äußeren, der Kokillenwand zugekehrten Oberfläche des Gußkörpers zum Einsatz kommen.This allows, among other things, considerably reduce the effort required for finishing the cast part and specifically influence the properties of the hard metal-metal composite. It is therefore the first time in an economical and reproducible manner to manufacture a wear-resistant hard metal composite using the centrifugal casting method (vertical and horizontal centrifugal casting) for wear-resistant armouring of large and expensive components, e.g. Rolling, rolling, possible. In addition, very hard borides, oxides and carbides can be used to reinforce the outer surface of the cast body facing the mold wall.
Die Erfindung wird im folgenden unter Bezugnahme auf die Zeichnung näher beschrieben.
Es zeigt Fig. 1 die schaubildliche Darstellung des erfindungsgemäßen Verfahrens zum kontinuierlichen Herstellen eines verschleißbeständigen Hartstoff-Metallverbundes durch Schleudergießen (hier: Horizontal-Schleuderguß).The invention is described in more detail below with reference to the drawing.
1 shows the diagrammatic representation of the method according to the invention for the continuous production of a wear-resistant hard material-metal composite by centrifugal casting (here: horizontal centrifugal casting).
Die Schleudergußkokille 1 wird zunächst durch die Antriebsrollen 2 in eine Drehbewegung um ihre Symmetrieachse versetzt. Nach dem Erreichen einer für die gleichmäßige Verteilung der Metallschmelze in der Schleudergußkokille 1 ausreichend hohen Drehgeschwindigkeit wird nach dem üblichen Aufbringen einer Schlichte auf die Kokillenwand (in der Figur nicht gezeigt) reine Metallschmelze 3 aus der Gießpfanne 4 durch die Gießvorrichtung 5 in die kalte Schleudergußkokille 1 gegossen. Durch die hohe Wärmeabfuhr, bedingt durch die kalte Schleudergußkokille 1, erstarrt unmittelbar eine ca. 5 - 15 mm starke Bearbeitungsschicht 6. Nach Fertigstellung des Gußstückes kann die spanhebende Bearbeitung dieser Schicht, die auf den Gießprozeß und die Kokillenkontur zurückzuführenden Fertigungstoleranzen ausgeglichen werden. Mit Hilfe einer Fördereinrichtung 7 (hier nach dem Prinzip einer Wirbelbett-Fördereinrichtung) werden nun mit einem inerten Schutzgas als Träger- bzw. Fördergas 8, vorzugsweise Argon, feste pulverförmige und/oder körnige Hartstoffe 9 durch eine Öffnung 10 in der Gießvorrichtung 5, in der Nähe der Schleudergußkokille 1, in den die Gießvorrichtung 5 durchfließenden Metallstrom injiziert. Die Dosierung der Hartstoffe erfolgt in einfacher Weise durch Einstellung des Trägergasdruckes. Nach Beaufschlagung der Metallschmelze mit synthetischen Hartstoffen 11 wird der Gießvorgang durch Unterbrechung der Pulverzufuhr mit reiner Metallschmelze 12 bis zur Fertigstellung des Gußteiles fortgesetzt.The
Fig. 2 zeigt beispielhaft einen Querschnitt durch eine nach dem entwickelten Verfahren gegossene Walze mit einer Bearbeitungsschicht aus Stahlguß 13, einer verschleißbeständigen Schicht 14 aus Stahlguß mit eingebetteten synthetischen Hartstoffen 15 und einen Kern aus Stahlguß 16.2 shows an example of a cross section through a roller cast according to the developed method with a processing layer made of
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT88121821T ATE89205T1 (en) | 1988-03-08 | 1988-12-29 | PROCESS FOR THE CONTINUOUS MANUFACTURE OF A WEAR-RESISTANT HARD MATERIAL-METAL COMPOSITE BY CENTRAL CASTING. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3807512 | 1988-03-08 | ||
| DE3807512A DE3807512A1 (en) | 1988-03-08 | 1988-03-08 | METHOD FOR CONTINUOUSLY PRODUCING A WEAR-RESISTANT CARBIDE-METAL COMPOSITE BY SPIN CASTING |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0335012A1 true EP0335012A1 (en) | 1989-10-04 |
| EP0335012B1 EP0335012B1 (en) | 1993-05-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88121821A Expired - Lifetime EP0335012B1 (en) | 1988-03-08 | 1988-12-29 | Method for continuously producing a wear resistant metal-hard material composite by centrifugal casting |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0335012B1 (en) |
| AT (1) | ATE89205T1 (en) |
| DE (2) | DE3807512A1 (en) |
| ES (1) | ES2042706T3 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0379400A1 (en) * | 1989-01-16 | 1990-07-25 | Les Bronzes D'industrie | Apparatus for manufacturing composite materials by centrifugation |
| WO2001045879A1 (en) * | 1999-12-20 | 2001-06-28 | Dochernee Predpriyatie Nexus Proizvodstvenno-Kommercheskaya Kompaniya | Method for centrifugal casting of blanks for rollers used in machines for continuous casting of blanks |
| RU2443505C1 (en) * | 2010-10-06 | 2012-02-27 | Государственное образовательное учреждение высшего профессионального образования "Южно-Уральский государственный университет" (ГОУ ВПО "ЮУрГУ") | Method of producing steel tube billets |
| WO2012048919A1 (en) * | 2010-10-13 | 2012-04-19 | Federal-Mogul Burscheid Gmbh | Method for producing a piston ring having embedded particles |
| RU2643850C1 (en) * | 2016-12-12 | 2018-02-06 | Федеральное государственное автономное образовательное учреждение высшего образования "Южно-Уральский государственный университет (национальный исследовательский университет)" (ФГАОУ ВО "ЮУрГУ (НИУ)") | Method for producing thin-walled tube blank |
| RU2647975C1 (en) * | 2016-12-12 | 2018-03-21 | федеральное государственное автономное образовательное учреждение высшего образования "Южно-Уральский государственный университет (национальный исследовательский университет)" (ФГАОУ ВО "ЮУрГУ" (НИУ)") | Method of producing cast steel by centrifugal casting |
| RU2742093C1 (en) * | 2020-07-30 | 2021-02-02 | Федеральное государственное автономное образовательное учреждение высшего образования "Южно-Уральский государственный университет (национальный исследовательский университет)" ФГАОУ ВО "ЮУрГУ (НИУ)" | Method of producing steel tubing billet with high radiation resistance |
| CN112808966A (en) * | 2019-11-15 | 2021-05-18 | 丰田自动车株式会社 | Casting device |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT412074B (en) * | 2002-09-16 | 2004-09-27 | Bernhard Dr Feistritzer | Producing ferrous castings with rotation symmetry, e.g. rolling mill and crusher roller mantles etc., has a mold to take the molten metal and which rotates around an axis with a defined centrifugal acceleration |
| CN101954466B (en) * | 2010-11-02 | 2015-09-02 | 北京中煤矿山工程有限公司 | Centrifugal casting process for shell of bimetal compound metallurgical wedge hob |
| DE102017208000A1 (en) * | 2017-05-11 | 2018-11-15 | Mahle International Gmbh | Method for producing an engine block |
| CN114210943B (en) * | 2021-12-28 | 2023-03-14 | 马鞍山市海天重工科技发展有限公司 | Pouring production process for arc lining plate of discharge door |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE861005C (en) * | 1944-09-07 | 1952-12-29 | Gussstahlwerk Bochumer Ver Ag | Process for the formation of pore-free and crack-free surfaces of a hollow body cast by centrifugal casting |
| US2681260A (en) * | 1951-07-27 | 1954-06-15 | Norton Co | Cylinder and liner |
-
1988
- 1988-03-08 DE DE3807512A patent/DE3807512A1/en not_active Withdrawn
- 1988-12-29 AT AT88121821T patent/ATE89205T1/en not_active IP Right Cessation
- 1988-12-29 EP EP88121821A patent/EP0335012B1/en not_active Expired - Lifetime
- 1988-12-29 DE DE8888121821T patent/DE3881029D1/en not_active Expired - Fee Related
- 1988-12-29 ES ES88121821T patent/ES2042706T3/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE861005C (en) * | 1944-09-07 | 1952-12-29 | Gussstahlwerk Bochumer Ver Ag | Process for the formation of pore-free and crack-free surfaces of a hollow body cast by centrifugal casting |
| US2681260A (en) * | 1951-07-27 | 1954-06-15 | Norton Co | Cylinder and liner |
Non-Patent Citations (4)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN, Band 6, Nr. 150 (M-148)[1028], 10. August 1982; & JP-A-57 070 075 (KUBOTA TEKKO K.K.) 30-04-1982 * |
| PATENT ABSTRACTS OF JAPAN, Band 7, Nr. 79 (M-204)[1224], 31. März 1983; & JP-A-58 006 769 (KUBOTA TEKKO K.K.) 14-01-1983 * |
| PATENT ABSTRACTS OF JAPAN, Band 9, Nr. 286 (M-429)[2009], 13. November 1985; & JP-A-60 127 067 (KUBOTA TEKKO K.K.) 06-07-1985 * |
| SOVIET INVENTIONS ILLUSTRATED, Teil CH, Woche D11, 22. April 1981, Klasse M22, Nr. 18954 D/11, Derwent Publications Ltd, London, GB; & SU-A-595 579 (AS UKR CASTING PROB) 30.06.1980 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0379400A1 (en) * | 1989-01-16 | 1990-07-25 | Les Bronzes D'industrie | Apparatus for manufacturing composite materials by centrifugation |
| WO2001045879A1 (en) * | 1999-12-20 | 2001-06-28 | Dochernee Predpriyatie Nexus Proizvodstvenno-Kommercheskaya Kompaniya | Method for centrifugal casting of blanks for rollers used in machines for continuous casting of blanks |
| RU2443505C1 (en) * | 2010-10-06 | 2012-02-27 | Государственное образовательное учреждение высшего профессионального образования "Южно-Уральский государственный университет" (ГОУ ВПО "ЮУрГУ") | Method of producing steel tube billets |
| WO2012048919A1 (en) * | 2010-10-13 | 2012-04-19 | Federal-Mogul Burscheid Gmbh | Method for producing a piston ring having embedded particles |
| JP2013540969A (en) * | 2010-10-13 | 2013-11-07 | フェデラル−モーグル ブルシェイド ゲーエムベーハー | Manufacturing method of particle-embedded piston ring |
| US9174276B2 (en) | 2010-10-13 | 2015-11-03 | Federal-Mogul Burscheid Gmbh | Method of producing a piston ring having embedded particles |
| RU2643850C1 (en) * | 2016-12-12 | 2018-02-06 | Федеральное государственное автономное образовательное учреждение высшего образования "Южно-Уральский государственный университет (национальный исследовательский университет)" (ФГАОУ ВО "ЮУрГУ (НИУ)") | Method for producing thin-walled tube blank |
| RU2647975C1 (en) * | 2016-12-12 | 2018-03-21 | федеральное государственное автономное образовательное учреждение высшего образования "Южно-Уральский государственный университет (национальный исследовательский университет)" (ФГАОУ ВО "ЮУрГУ" (НИУ)") | Method of producing cast steel by centrifugal casting |
| CN112808966A (en) * | 2019-11-15 | 2021-05-18 | 丰田自动车株式会社 | Casting device |
| RU2742093C1 (en) * | 2020-07-30 | 2021-02-02 | Федеральное государственное автономное образовательное учреждение высшего образования "Южно-Уральский государственный университет (национальный исследовательский университет)" ФГАОУ ВО "ЮУрГУ (НИУ)" | Method of producing steel tubing billet with high radiation resistance |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0335012B1 (en) | 1993-05-12 |
| ES2042706T3 (en) | 1993-12-16 |
| ATE89205T1 (en) | 1993-05-15 |
| DE3881029D1 (en) | 1993-06-17 |
| DE3807512A1 (en) | 1989-09-21 |
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