EP0349031A1 - Composite cast piece - Google Patents
Composite cast piece Download PDFInfo
- Publication number
- EP0349031A1 EP0349031A1 EP89201525A EP89201525A EP0349031A1 EP 0349031 A1 EP0349031 A1 EP 0349031A1 EP 89201525 A EP89201525 A EP 89201525A EP 89201525 A EP89201525 A EP 89201525A EP 0349031 A1 EP0349031 A1 EP 0349031A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- holding means
- base body
- melting temperature
- composite casting
- cast
- 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.)
- Withdrawn
Links
Images
Classifications
-
- 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
- B22D19/0009—Cylinders, pistons
- B22D19/0027—Cylinders, pistons pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/02—Light metals
- F05C2201/021—Aluminium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/04—Heavy metals
- F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
- F05C2201/0448—Steel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2253/00—Other material characteristics; Treatment of material
- F05C2253/16—Fibres
Definitions
- the invention relates to a composite casting of a cast base body and by means of a holding means formed from a metallic material insert or molded therein from a material different from the material of the base body, in particular as an oscillating mass forces component of piston engines, in particular internal combustion engines.
- DE-B-2 408 500 describes a component made of spheroidal graphite cast iron for machine and engine construction, into which a locally made of a high-strength material of low or non-iron is described Cobalt-based alloy or heat-resistant nickel-chromium-silicon-based insert is cast in.
- a component made of spheroidal graphite cast iron for machine and engine construction into which a locally made of a high-strength material of low or non-iron is described
- Cobalt-based alloy or heat-resistant nickel-chromium-silicon-based insert is cast in.
- temperature-resistant, heat-insulating and / or wear-resistant insert parts in the area of the parts to be protected, such as the piston crown, top land and first piston ring groove Pour into the piston body from ceramic material.
- cooling channels through which cooling oil can flow are arranged in the piston head, which are produced by ring-shaped hollow cores made of steel or copper or solid salt cores cast into the piston body.
- the hollow cores must be removed from the piston body with acid and the salt cores rinsed out with water.
- the insert parts are fastened in a self-supporting manner in the casting mold or on the casting cores by means of holding means and remain in the cast base body.
- the holding means or parts thereof can loosen or loosen under the influence of the gas and inertial forces that change periodically during engine operation, which leads to considerable consequential damage and even failure of the internal combustion engine can.
- This object is achieved in that there is a cohesive metallic bond between the base body and the holding means, which is achieved when the composite casting is cast by melting or melting the holding means.
- holding means made of suitable light metal alloys with a coordinated melting temperature have significantly higher weight-specific strengths than conventional holding means made of ferrous material, over the entire operating temperature range of the composite casting are at least twice as high. This significantly increases the security against characteristic damage cases, caused by the effect of the periodically changing mass forces. In the event of overstressing of parts of the holding means that are not metallically connected to the base body, for example in inaccessible areas of the composite casting, these are conserved by plastic deformation due to the high ductility of the light metal alloys used.
- Another advantage can be seen in the fact that commercially available semi-finished products, such as standardized welding wires made of light metal alloys, can be used for the holding means, whereas the holding means which were customary up to now had to have special geometric shapes for better anchoring.
- the melting temperature of the material of the holding means is expediently the same as the melting temperature of the material of the base body, preferably the difference is up to 100 K, in particular up to 75 K.
- the melting temperature of the material of the holding means is somewhat lower than the melting temperature of the material of the base body.
- the melting temperature of the material of the holding means is somewhat higher than the melting temperature of the material of the base body.
- holding means made of aluminum alloy of the type AlMg3 with different diameters were poured into eutectic aluminum piston alloys of the type G-AlSil2CuMgNi at a casting temperature of 973 to 1073 ° C.
- the holding means could be melted down to a depth of 15% of the diameter and thus a solid material bond between the cast body and the holding means could be achieved.
- Fig. 1 shows a broken-away sectional view of a holding pin (1) made of the aluminum alloy of the AlMg3 type and embedded in its one section in a sand / salt-based casting core, the other section of which is in a cast body (4) made of the eutectic aluminum-piston alloy of the type G-AlSil2CuMgNi is poured in such a way that the retaining pin (1) in the zone (3) is melted to form a metallic compound.
- FIG. 2 shows a section along the section line A-B of FIG. 1.
- the solidus temperature of the retaining pin (1) is approx. 90 K above that of the material of the cast body (4).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
Die Erfindung betrifft ein Verbundgußstück aus gegossenem Grundkörper und mittels aus metallischem Werkstoff gebildetem Haltemittel darin ein- oder angegossenem Einlegteil aus vom Werkstoff des Grundkörpers unterschiedlichen Werkstoff, insbesondere als oszillierenden Massenkräften unterworfenes Bauteil von Kolbenmaschinen, insbesondere Brennkraftmaschinen.The invention relates to a composite casting of a cast base body and by means of a holding means formed from a metallic material insert or molded therein from a material different from the material of the base body, in particular as an oscillating mass forces component of piston engines, in particular internal combustion engines.
Das Ein- bzw. Angießen metallischer und nicht-metallischer Einlegteile ist bei der Herstellung von Gußstücken durch statischen und dynamischen Guß möglich. Derartige Verbundgußstücke sind immer dann von Interesse, wenn konstruktive und/oder technische Erfordernisse eines Gußstückes die Ausnützung der spezifisch günstigen Eigenschaften unterschiedlicher Werkstoffe notwendig machen, wobei zwischen dem gegossenen Grundkörper und dem Einlegteil entweder eine stoffschlüssige metallische Bindung oder eine als Schrumpf- oder Verzahnungshaftung bezeichnete Bindung besteht. Bei Verbundgußstücken mit einem Grundkörper aus Leichtmetall und einem Einlegteil aus Eisenwerkstoff, Kupferwerkstoff, harter Aluminiumlegierung oder Faser- bzw. Whisker-Werkstoff werden neben dem geringen Gewicht und der guten Wärmeleitfähigkeit und der chemischen Beständigkeit des Leichtmetalls die besseren mechanisch-technologischen Eigenschaften des Werkstoffs des Einlegteils benutzt.The casting or pouring of metallic and non-metallic insert parts is possible in the manufacture of castings by static and dynamic casting. Composite castings of this type are always of interest when the design and / or technical requirements of a casting make it necessary to take advantage of the specifically favorable properties of different materials, with either a cohesive metallic bond or a bond referred to as shrinkage or gear adhesion between the cast base body and the insert consists. In the case of composite castings with a base body made of light metal and an insert made of iron material, copper material, hard aluminum alloy or fiber or whisker material, in addition to the low weight and the good thermal conductivity and chemical resistance of the light metal, the better mechanical-technological properties of the material of the insert part used.
In der DE-B-2 408 500 ist ein aus Gußeisen mit Kugelgraphit bestehendes Bauteil für den Maschinen- und Motorenbau beschrieben, in das lokal ein aus einem hochfesten Werkstoff einer eisenarmen oder eisenfreien Legierung auf Kobalt-Basis oder warmfesten Legierung auf Nickel-Chrom-Silizium-Basis gebildetes Einlegteil eingegossen ist. In Fällen, in denen beispielsweise Leichtmetallkolben für Brennkraftmaschinen im Motorbetrieb vergleichsweise hohen mechanischen und/oder thermischen Belastungen ausgesetzt sind, ist es angebracht, im Bereich der zu schützenden Partien, wie insbesondere Kolbenboden, Feuersteg und erste Kolbenringnute, temperaturwechselbeständige, wärmedämmende und/oder verschleißfeste Einlegteile aus keramischem Werkstoff in den Kolbengrundkörper einzugießen. Wenn es um den reinen Wärmeschutz des Kolbens geht, sind von Kühlöl durchströmbare Kühlkanäle im Kolbenkopf angeordnet, die durch ringförmige in den Kolbengrundkörper eingegossene Hohlkerne aus Stahl oder Kupfer oder Salzvollkerne hergestellt werden. Die Hohlkerne müssen mit Säure aus dem Kolbengrundkörper herausgelöst und die Salzkerne mit Wasser herausgespült werden.DE-B-2 408 500 describes a component made of spheroidal graphite cast iron for machine and engine construction, into which a locally made of a high-strength material of low or non-iron is described Cobalt-based alloy or heat-resistant nickel-chromium-silicon-based insert is cast in. In cases where, for example, light metal pistons for internal combustion engines in engine operation are exposed to comparatively high mechanical and / or thermal loads, it is appropriate to insert temperature-resistant, heat-insulating and / or wear-resistant insert parts in the area of the parts to be protected, such as the piston crown, top land and first piston ring groove Pour into the piston body from ceramic material. When it comes to the pure heat protection of the piston, cooling channels through which cooling oil can flow are arranged in the piston head, which are produced by ring-shaped hollow cores made of steel or copper or solid salt cores cast into the piston body. The hollow cores must be removed from the piston body with acid and the salt cores rinsed out with water.
In aller Regel werden die Einlegteile mittels Haltemitteln in der Gießform oder an den Gießkernen freitragend befestigt und verbleiben in dem gegossenen Grundkörper. Da jedoch zwischen dem Grundkörper und dem eingegossenen Haltemittel keine metallische Bindung besteht, kann sich unter der Einwirkung der im Motorbetrieb periodisch veränderlichen Gas- und Massenkräfte das Haltemittel bzw. Teile desselben lockern oder lösen, was zu erheblichen Folgeschäden bis hin zu einem Ausfall der Brennkraftmaschine führen kann.As a rule, the insert parts are fastened in a self-supporting manner in the casting mold or on the casting cores by means of holding means and remain in the cast base body. However, since there is no metallic bond between the base body and the cast-in holding means, the holding means or parts thereof can loosen or loosen under the influence of the gas and inertial forces that change periodically during engine operation, which leads to considerable consequential damage and even failure of the internal combustion engine can.
Es ist zwar bekannt, Haltemittel von Einlegteilen aus dem gegossenen Grundkörper herauszuziehen und die entstandenen Löcher entweder mit Leichtmetall zu stopfen oder mit pulverförmigem Leichtmetall zu verschließen und durch Warmhohlpressen das Leichtmetall mit dem Werkstoff des Grundkörpers zu verbinden (DE-C-1 577 099, DE-B-1 627 757). Solche Maßnahmen sind allerdings mit einem beachtlichen technischen und zeitlichen Aufwand verbunden.It is known to pull holding means of insert parts out of the cast base body and to either plug the holes formed with light metal or to close them with powdered light metal and through Hot hollow presses to connect the light metal with the material of the base body (DE-C-1 577 099, DE-B-1 627 757). However, such measures are associated with considerable technical and time expenditure.
Bekannt ist auch (DE-A-2 402 337), bei der Herstellung eines Leichtmetallkolbens mit im Kolbenkopf angeordneten ringförmigen, mittels eines Salzvollkerns hergestellten Kühlkanals den Salzkern durch ein Haltemittel in die in der Kokille befindlichen Schmelze in die gewünschte Position einzutauchen und das Haltemittel aus der Restschmelze zu entfernen, sobald die Erstarrungsfront die Unterseite des Salzkerns erreicht hat. Dieses Verfahren hat sich in der Gießereipraxis jedoch nicht durchsetzen können.It is also known (DE-A-2 402 337), in the manufacture of a light metal piston with annular cooling channels arranged in the piston head and produced by means of a solid salt core, to immerse the salt core into the desired position in the melt located in the mold and to remove the holding means from the holding means remove the residual melt as soon as the solidification front has reached the bottom of the salt core. However, this process has not been successful in foundry practice.
Es ist die Aufgabe der vorliegenden Erfindung, das in dem Grundkörper des eingangs beschriebenen Verbundgußstücks eingegossene Haltemittel für das Einlegteil unlösbar in dem Grundkörper zu verankern.It is the object of the present invention to anchor the holding means cast in the base body of the composite casting described at the beginning for the insert part so that it cannot be detached from the base body.
Die Lösung dieser Aufgabe erfolgt dadurch, daß zwischen dem Grundkörper und dem Haltemittel eine stoffschlüssige metallische Bindung besteht, die beim Gießen des Verbundgußstücks durch ein Anschmelzen oder Aufschmelzen des Haltemittels erreicht wird.This object is achieved in that there is a cohesive metallic bond between the base body and the holding means, which is achieved when the composite casting is cast by melting or melting the holding means.
Bei Verbundgußstücken, bei denen der Grundkörper aus Leichtmetall besteht, besitzen Haltemittel aus geeigneten Leichtmetallegierungen mit abgestimmter Schmelztemperatur gegenüber herkömmlichen Haltemitteln aus Eisenwerkstoff deutlich höhere gewichtsspezifische Festigkeiten, die über den gesamten Einsatztemperaturbereich des Verbundgußstücks mindestens doppelt so hoch liegen. Dadurch wird die Sicherheit gegenüber charakteristischen Schadensfällen, verursacht durch die Wirkung der periodisch veränderlichen Massenkräfte, deutlich erhöht. Für den Fall auftretender Überbeanspruchungen von nicht mit dem Grundkörper metallisch verbundenen Teilen des Haltemittels, beispielsweise in unzugänglichen Bereichen des Verbundgußstücks, werden diese durch die hohe Duktilität der verwendeten Leichtmetallegierungen durch plastische Verformung konservativ aufgefangen. Ein weiterer Vorteil ist darin zu sehen, daß für das Haltemittel handelsübliches Halbzeug, wie z.B. genormte Schweißdrähte aus Leichtmetallegierungen, eingesetzt werden können, während die bisher üblichen aus Eisenwerkstoff bestehenden Haltemittel zum Zwecke einer besseren Verankerung spezielle geometrische Formen aufweisen mußten.In the case of composite castings in which the base body is made of light metal, holding means made of suitable light metal alloys with a coordinated melting temperature have significantly higher weight-specific strengths than conventional holding means made of ferrous material, over the entire operating temperature range of the composite casting are at least twice as high. This significantly increases the security against characteristic damage cases, caused by the effect of the periodically changing mass forces. In the event of overstressing of parts of the holding means that are not metallically connected to the base body, for example in inaccessible areas of the composite casting, these are conserved by plastic deformation due to the high ductility of the light metal alloys used. Another advantage can be seen in the fact that commercially available semi-finished products, such as standardized welding wires made of light metal alloys, can be used for the holding means, whereas the holding means which were customary up to now had to have special geometric shapes for better anchoring.
Zweckmäßigerweise ist die Schmelztemperatur des Werkstoffs des Haltemittels größenordnungsmäßig gleich der Schmelztemperatur des Werkstoffs des Grundkörpers, vorzugsweise beträgt die Differenz bis zu 100 K, insbesondere bis zu 75 K.The melting temperature of the material of the holding means is expediently the same as the melting temperature of the material of the base body, preferably the difference is up to 100 K, in particular up to 75 K.
Im Rahmen der weiteren Ausgestaltung der Erfindung ist bei durch statisches Gießen hergestellten Verbundgußstücken die Schmelztemperatur des Werkstoffs des Haltemittels etwas niedriger als die Schmelztemperatur des Werkstoffs des Grundkörpers.In the further embodiment of the invention, in the case of composite castings produced by static casting, the melting temperature of the material of the holding means is somewhat lower than the melting temperature of the material of the base body.
Sind die Verbundgußstücke durch dynamisches Gießen hergestellt, so ist die Schmelztemperatur des Werkstoffs des Haltemittels etwas höher als die Schmelztemperatur des Werkstoffs des Grundkörpers.If the composite castings are produced by dynamic casting, the melting temperature of the material of the holding means is somewhat higher than the melting temperature of the material of the base body.
Je nach Werkstoffwahl für das Haltemittel kann dieses nur angeschmolzen oder ganz aufgeschmolzen sein.Depending on the choice of material for the holding means, this can only be melted or completely melted.
Die Erfindung ist im folgenden anhand eines Ausführungsbeispiels näher erläutert.The invention is explained in more detail below using an exemplary embodiment.
Im Preßgießverfahren wurden Haltemittel aus der Aluminiumlegierung des Typs AlMg₃ mit unterschiedlichem Durchmesser in eutektische Aluminium-Kolbenlegierung des Typs G-AlSil2CuMgNi bei einer Gießtemperatur von 973 bis 1073°C eingegossen. In allen Fällen konnte ein Anschmelzen der Haltemittel bis auf eine Tiefe von 15 % des Durchmessers und damit eine feste stoffschlüssige metallische Bindung zwischen Gußkörper und Haltemittel erzielt werden.In the die-casting process, holding means made of aluminum alloy of the type AlMg₃ with different diameters were poured into eutectic aluminum piston alloys of the type G-AlSil2CuMgNi at a casting temperature of 973 to 1073 ° C. In all cases, the holding means could be melted down to a depth of 15% of the diameter and thus a solid material bond between the cast body and the holding means could be achieved.
Fig. 1 zeigt in einer abgebrochenen Schnittdarstellung einen mit seinem einen Abschnitt in einen Gießkern auf Sand-/Salzbasis eingebetteten Haltestift (1) aus der Aluminiumlegierung des Typs AlMg3, dessen anderer Abschnitt in einen Gußkörper (4) aus der eutektischen Aluminium-Kolbenlegierung des Typs G-AlSil2CuMgNi so eingegossen ist, daß der Haltestift (1) in der Zone (3) unter Bildung eines metallischen Verbundes aufgeschmolzen ist.Fig. 1 shows a broken-away sectional view of a holding pin (1) made of the aluminum alloy of the AlMg3 type and embedded in its one section in a sand / salt-based casting core, the other section of which is in a cast body (4) made of the eutectic aluminum-piston alloy of the type G-AlSil2CuMgNi is poured in such a way that the retaining pin (1) in the zone (3) is melted to form a metallic compound.
In Fig. 2 ist ein Schnitt entlang der Schnittlinie A-B der Fig. 1 dargestellt. Die Solidustemperatur des Haltestifts (1) liegt ca. 90 K über derjenigen des Werkstoffs des Gußkörpers (4).FIG. 2 shows a section along the section line A-B of FIG. 1. The solidus temperature of the retaining pin (1) is approx. 90 K above that of the material of the cast body (4).
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19883822032 DE3822032A1 (en) | 1988-06-30 | 1988-06-30 | COMPOSITE CASTING PIECE |
DE3822032 | 1988-06-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0349031A1 true EP0349031A1 (en) | 1990-01-03 |
Family
ID=6357586
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89201525A Withdrawn EP0349031A1 (en) | 1988-06-30 | 1989-06-13 | Composite cast piece |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0349031A1 (en) |
DE (1) | DE3822032A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994000614A2 (en) * | 1992-06-30 | 1994-01-06 | Mahle Gmbh | Reinforcing material for pistons of internal combustion engines |
DE19647069A1 (en) * | 1996-11-14 | 1998-05-20 | Heidelberger Druckmasch Ag | Hollow cast body e.g. printing machine cylinder preform |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1174211A (en) * | 1957-04-12 | 1959-03-09 | Improvements in or relating to the manufacture of composite metal articles | |
GB2019758A (en) * | 1978-04-19 | 1979-11-07 | Maschf Augsburg Nuernberg Ag | Making a composite cylinder head |
DE2854958A1 (en) * | 1978-12-20 | 1980-07-10 | Daimler Benz Ag | Composite cast cylinder blocks for IC engine - consists of aluminium alloy block cast round liners made of wear resistant, hypereutectic aluminium silicon alloy |
-
1988
- 1988-06-30 DE DE19883822032 patent/DE3822032A1/en not_active Withdrawn
-
1989
- 1989-06-13 EP EP89201525A patent/EP0349031A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1174211A (en) * | 1957-04-12 | 1959-03-09 | Improvements in or relating to the manufacture of composite metal articles | |
GB2019758A (en) * | 1978-04-19 | 1979-11-07 | Maschf Augsburg Nuernberg Ag | Making a composite cylinder head |
DE2854958A1 (en) * | 1978-12-20 | 1980-07-10 | Daimler Benz Ag | Composite cast cylinder blocks for IC engine - consists of aluminium alloy block cast round liners made of wear resistant, hypereutectic aluminium silicon alloy |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994000614A2 (en) * | 1992-06-30 | 1994-01-06 | Mahle Gmbh | Reinforcing material for pistons of internal combustion engines |
WO1994000614A3 (en) * | 1992-06-30 | 1994-03-03 | Mahle Gmbh | Reinforcing material for pistons of internal combustion engines |
DE19647069A1 (en) * | 1996-11-14 | 1998-05-20 | Heidelberger Druckmasch Ag | Hollow cast body e.g. printing machine cylinder preform |
Also Published As
Publication number | Publication date |
---|---|
DE3822032A1 (en) | 1990-01-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69025288T2 (en) | Full mold casting of an engine block from two alloys | |
DE102006030699B4 (en) | Cast steel piston for internal combustion engines | |
EP0640759B1 (en) | Partially reinforced aluminium cast construction part and method of manufacturing same | |
DE3234504A1 (en) | PISTON FOR INTERNAL COMBUSTION ENGINES AND METHOD FOR THE PRODUCTION THEREOF | |
DE2929845C2 (en) | ||
EP0000592A1 (en) | Cooled piston for an internal-combustion engine and method for producing same | |
DE19807176A1 (en) | Method for producing a piston for internal combustion engines | |
DE10153721C5 (en) | Casting tool for producing a cylinder crankcase | |
DE3642978C1 (en) | Method for the production of holes | |
DE19859098C1 (en) | Grey cast iron cylinder liner for incorporation during casting of a light metal internal combustion engine block, is partially covered with an exterior non-fusible metal fitting to promote bonding to the cast light metal | |
DE901104C (en) | Composite casting and process for its manufacture | |
DE1285680B (en) | Process for the production of cast metal bodies with high thermal conductivity and wear and heat-resistant inner surfaces | |
DE3027352A1 (en) | PISTON WITH ARMORING FOR THE PISTON RING GROOVES | |
DE4414095A1 (en) | Method for connecting two metal workpieces to form a composite component | |
DE2501370B2 (en) | PROCESS FOR MANUFACTURING CAST IRON MACHINE COMPONENTS WITH FRICTIONAL SURFACES HIGH WEAR RESISTANCE | |
DE3200641A1 (en) | METHOD AND DEVICE FOR THE CASTING OF A LIGHT METAL PISTON HAVING AN ABRASION-RESISTANT INSERT | |
EP0349031A1 (en) | Composite cast piece | |
DE102007010839B4 (en) | A method of manufacturing a piston and piston having an annular reinforcement comprising a plurality of reinforcing segments | |
DE4313336C2 (en) | Process for the production of gray cast iron cylinder heads and cooling element for carrying out the process | |
DE10042207A1 (en) | Cast aluminum engine piston for demanding applications has conical insert of heat resistant alloy welded between base and gudgeon pin bores | |
DE102007060502A1 (en) | Method for producing a cylinder crankcase | |
EP1226889A2 (en) | Process for manufacturing a casting consisting of at least two different metallic materials | |
DE892230C (en) | Process for the continuous casting of metallic materials | |
DE3939261A1 (en) | Elongated part e.g. connecting rod with core and cast covering - has compression resistant e.g. sintered material core with clamping pins extending into outer steel cover | |
DE102018127559A1 (en) | Component of an internal combustion engine, in particular cylinder head, mold assembly and method for producing a component of an internal combustion engine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE GB IT |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Withdrawal date: 19900703 |