EP0478025A1 - Components for engines and vehicles - Google Patents
Components for engines and vehicles Download PDFInfo
- Publication number
- EP0478025A1 EP0478025A1 EP91202112A EP91202112A EP0478025A1 EP 0478025 A1 EP0478025 A1 EP 0478025A1 EP 91202112 A EP91202112 A EP 91202112A EP 91202112 A EP91202112 A EP 91202112A EP 0478025 A1 EP0478025 A1 EP 0478025A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mass
- magnesium
- components according
- addition
- embedded
- 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- Withdrawn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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
Definitions
- the invention relates to components for engines and vehicles, in particular pistons, cylinders, cylinder heads, cylinder blocks and gear housings for internal combustion engines or compressors, which are made of magnesium or magnesium alloy by low pressure, pressure or pressure casting.
- the reduction in the compression height of the piston and a reduction in the piston skirt's comparatively low density of magnesium or magnesium alloys always provided an incentive to test the pistons made from them in internal combustion engines to reduce the oscillating masses of the internal combustion engine and to lower the bearing pressures due to the relatively lighter piston.
- Magnesium materials have very considerable disadvantages compared to the aluminum-silicon alloys usually used for the production of light metal pistons for internal combustion engines.
- the lifespan of pistons made of magnesium materials is relatively short and their strength is relatively low compared to the dynamic stress caused by the gas forces.
- DE-20 46 862 A describes the running surface of the piston made of magnesium material with a wear-resistant metallic running layer, e.g. Chrome, which should adhere to the piston body via an intermediate layer of aluminum.
- a wear-resistant metallic running layer e.g. Chrome
- the solution to this problem consists in a component consisting of the material mentioned at the beginning, in whose heat-resistant ductile matrix, hard fine-lamellar eutectic and solid, primarily excreted magnesium silicide is embedded. Compared to a component cast from a conventional aluminum-silicon alloy, such a component has a comparatively lower mass with sufficient heat resistance and wear resistance as well as lower friction.
- magnesium silicide or silicon added to the magnesium or magnesium alloy melt leads to an excretion of finely lamellar, eutectic and solid primarily excreted magnesium silicide during solidification, which has good strength properties, in particular high fatigue strength, at high component temperatures.
- magnesium silicide or 0.1 to 2.5% by mass of silicon to the magnesium or magnesium alloy melt creates structures which, in the manner of a network of magnesium silicide of the eutectic, have excellent strength (Cohesion) of the component at elevated temperatures and contain mainly magnesium silicide phase in fine lamellar eutectic form in addition to magnesium.
- magnesium silicide By adding more than 3.6% by mass of magnesium silicide or more than 1.3% by mass of silicon to the magnesium or magnesium alloy melt, a bimodal structure is formed which consists of solid primarily excreted magnesium silicide and magnesium / magnesium silicide eutectic and makes a significant contribution to improving the heat resistance.
- the component matrix contains> 1 to 50% by mass, preferably 3 to 50% by mass, magnesium silicide.
- the components cast from magnesium or magnesium alloys all contain magnesium silicide in eutectic and primary form, preferably in the concentration range from> 0.3 to 18% by mass of silicon.
- the preferred magnesium alloys consist of 6 to 9% aluminum, 0.13% manganese, 0.68 to 0.7% zinc, balance magnesium and 3.5% rare earth, 5.25% yttrium, 0.5 % Zirconium, balance magnesium.
- the component matrix contains up to 12% by mass of aluminum and / or zinc, which increase the piston strength through precipitations.
- An increase in strength, in particular heat resistance, results from the addition of up to 16% by mass of silver.
- the component matrix can still contain up to 1% by mass of zirconium and / or titanium, which additionally produce a grain-refining effect.
- the creep resistance is improved by adding up to 7% by mass of one or more rare earth metals.
- the density of the magnesium material is reduced especially by the addition of up to 7% by mass of lithium.
- the hardening of the cast component can be accelerated by adding up to 1% by mass of one or more of the metals manganese, copper, cobalt, nickel and chromium.
- Ceramic fibers preferably consisting of aluminum oxide, silicon carbide, carbon, aluminum nitride or silicon nitride, can be embedded in the component matrix, fiber shaped bodies being expediently arranged.
- Fig. 1 shows a section through a piston crown (1) with combustion chamber trough (2), ring section (3) and shaft section (4) with piston pin bores (5) consisting of magnesium cast pistons for internal combustion engines along the plane comprising the piston axis and the piston pin axis .
- microstructure section (X) shown in the photograph according to FIG. 2 in 200 times magnification by light microscope approx. 50 vol is surrounded by fine lamellar eutectic magnesium silicide.
- the material has the properties listed in the table below. In comparison, the same properties are given for a common aluminum piston alloy of the type AISi12CuNiMg.
- the advantages achieved by the invention are to be seen in particular in that the density is reduced by at least 30% compared to the aluminum-silicon alloys usually used for the manufacture of pistons, but a similar, sufficiently high heat resistance is retained.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
Description
Die Erfindung betrifft Bauteile für Motoren und Fahrzeuge, insbesondere Kolben, Zylinder, Zylinderköpfe, Zylinderblöcke und Getriebegehäuse für Verbrennungsmotoren oder Kompressoren, die aus Magnesium bzw. Magnesiumlegierung durch Niederdruck-, Druck- oder Preßgießen hergestellt sind.The invention relates to components for engines and vehicles, in particular pistons, cylinders, cylinder heads, cylinder blocks and gear housings for internal combustion engines or compressors, which are made of magnesium or magnesium alloy by low pressure, pressure or pressure casting.
Das Streben nach verbrauchsgünstigen, geräusch- und vibrationsarmen Motoren und Fahrzeugen führt zu hohen Anforderungen an deren Bauteile. Von den für diesen Zweck sich anbietenden Möglichkeiten ist u.a. die Verkleinerung der effektiven Bauteilmasse von Bedeutung, da sie eine weitere sekundäre Gewichtsreduzierung bei Motoren und Fahrzeugen bietet und damit über ein niedrigeres Motor- und Fahrzeuggewicht zu weiteren Verbrauchseinsparungen führt. Die reduzierte Bauteilmasse regt die Motoren zu weniger Schwingungen an und bewirkt ein günstigeres akkustisches schwingungstechnisches Verhalten und erhöht damit den Komfort.The pursuit of low-consumption, low-noise and low-vibration engines and vehicles leads to high demands on their components. Among the options available for this purpose is the reduction in the effective component mass is important, since it offers a further secondary weight reduction for engines and vehicles and thus leads to further fuel savings through a lower engine and vehicle weight. The reduced component mass stimulates the motors to vibrate less and results in a more favorable acoustic behavior, thus increasing comfort.
So hat z.B. die neben der eine deutliche Verringerung der Kolbenmasse in den Bereichen Bolzennaben, Ringfeld und Kolbenboden hervorrufenden Reduzierung der Kompressionshöhe des Kolbens und einer Verkürzung des Kolbenschafts vergleichsweise geringe Dichte von Magnesium bzw. Magnesiumlegierungen immer einen Anreiz zum probeweisen Einsatz von daraus hergestellten Kolben in Verbrennungsmotoren gegeben, um durch den relativ leichteren Kolben die schwingenden Massen des Verbrennungsmotors zu verringern und die Lagerdrücke zu erniedrigen. Magnesiumwerkstoffe weisen gegenüber den üblicherweise für die Herstellung von Leichtmetallkolben für Verbrennungsmotoren verwendeten Aluminium-Silizium-Legierungen ganz beträchtliche Nachteile auf. Infolge der unzureichenden Verschleißfestigkeit gegenüber den beim An- und Einlaufen sowie Notlaufen im Motorbetrieb auftretenden Mischreibungszuständen ist die Lebensdauer von aus Magnesiumwerkstoffen gefertigten Kolben verhältnismäßig kurz und ihre Festigkeit gegenüber der dynamischen Beanspruchung durch die Gaskräfte relativ gering.For example, In addition to the significant reduction in the piston mass in the areas of the pin boss, the ring field and the piston crown, the reduction in the compression height of the piston and a reduction in the piston skirt's comparatively low density of magnesium or magnesium alloys always provided an incentive to test the pistons made from them in internal combustion engines to reduce the oscillating masses of the internal combustion engine and to lower the bearing pressures due to the relatively lighter piston. Magnesium materials have very considerable disadvantages compared to the aluminum-silicon alloys usually used for the production of light metal pistons for internal combustion engines. As a result of the inadequate wear resistance compared to the mixed friction states occurring during starting and running in as well as emergency running in engine operation, the lifespan of pistons made of magnesium materials is relatively short and their strength is relatively low compared to the dynamic stress caused by the gas forces.
Zur Verbesserung der Verschleißfestigkeit wird in der DE-20 46 862 A die Lauffläche des aus Magnesiumwerkstoff bestehenden Kolbens mit einer verschleißfesten metallischen Laufschicht, z.B. Chrom, versehen, die über eine Zwischenschicht aus Aluminium auf dem Kolbenkörper festhaften soll.To improve the wear resistance, DE-20 46 862 A describes the running surface of the piston made of magnesium material with a wear-resistant metallic running layer, e.g. Chrome, which should adhere to the piston body via an intermediate layer of aluminum.
Bekannt ist auch, die Laufflächen mit einem verschleißfesten Überzug aus Aluminiumlegierung, Eisen, Graphit, Mangan, Nickel, Zinn, Blei, Kadmium oder Zink zu versehen oder Magnesium mit verschleißfesten Elementen wie Aluminium oder Silizium zu legieren. Zur Verbesserung der Festigkeit wird Magnesium mit Cer und Thorium legiert und der Kolben durch Schmieden mit entsprechender Lenkung des Faserverlaufs gefertigt (Firmenschrift Mahle KG und Elektron-Co. mbH, Stuttgart-Bad Cannstadt, 1946). Alle diese Maßnahmen haben aber bisher nicht ausgereicht, um aus Magnesiumwerkstoffen funktionstüchtige Kolben für Verbrennungsmotoren zu erzeugen. Aus der JP-63-042 338 A ist zwar ein Kolben für Verbrennungsmotoren bekannt, der aus einer mit 3 bis 30 Vol.-% Aluminiumoxid-Siliziumoxid-Fasern verstärkten Magnesiumlegierung besteht. Derartige Leichtmetallkolben haben jedoch bisher noch keinen Eingang in die Praxis gefunden, da sie einen relativ hohen abrasiven Verschleiß der Zylinderlaufbahn hervorrufen.It is also known to provide the treads with a wear-resistant coating made of aluminum alloy, iron, graphite, manganese, nickel, tin, lead, cadmium or zinc or to alloy magnesium with wear-resistant elements such as aluminum or silicon. To improve the strength, magnesium is alloyed with cerium and thorium and the piston is made by forging with appropriate guidance of the fiber orientation (Mahle KG and Elektron-Co. MbH, Stuttgart-Bad Cannstadt, 1946). So far, however, all these measures have not been sufficient to produce functional pistons for internal combustion engines from magnesium materials. A piston for internal combustion engines is known from JP-63-042 338 A, which consists of a magnesium alloy reinforced with 3 to 30% by volume of aluminum oxide-silicon oxide fibers. However, light alloy pistons of this type have not yet been used in practice because they cause relatively high abrasive wear on the cylinder barrel.
Es ist daher die Aufgabe vorliegender Erfindung, aus Magnesium bzw. Magnesiumlegierung gegossene Bauteile für Motoren und Fahrzeuge bereitzustellen, die eine ausreichende Verschleißfestigkeit bei geringer Reibung besitzen und/oder die den hohen Anforderungen an die Festigkeit gegenüber der dynamischen Beanspruchung, insbesondere beim Einsatz in Verbrennungsmotoren mit sehr hoher spezifischer Leistung, genügen.It is therefore the object of the present invention to provide components for engines and vehicles cast from magnesium or magnesium alloy which have sufficient wear resistance with low friction and / or which meet the high demands on strength with respect to dynamic stress, in particular when used in internal combustion engines very high specific performance.
Die Lösung dieser Aufgabe besteht in einem aus dem eingangs genannten Werkstoff bestehenden Bauteil, in dessen warmfester duktiler Matrix hartes feinlamellares eutektisches und massives primär ausgeschiedenes Magnesiumsilizid eingebettet ist. Ein solches Bauteil besitzt gegenüber einem aus einer herkömmlichen Aluminium-Silizium-Legierung gegossenen Bauteil eine vergleichsweise niedrigere Masse bei gleichzeitig ausreichender Warmfestigkeit und Verschleißfestigkeit sowie niedrigerer Reibung.The solution to this problem consists in a component consisting of the material mentioned at the beginning, in whose heat-resistant ductile matrix, hard fine-lamellar eutectic and solid, primarily excreted magnesium silicide is embedded. Compared to a component cast from a conventional aluminum-silicon alloy, such a component has a comparatively lower mass with sufficient heat resistance and wear resistance as well as lower friction.
Der Zusatz von Magnesiumsilizid oder Silizium zu der Magnesium- bzw. Magnesiumlegierungsschmelze führt beim Erstarren zu einer Ausscheidung von feinlamellarem, eutektischem und massivem primär ausgeschiedenem Magnesiumsilizid, das bei hohen Bauteiltemperaturen gute Festigkeitseigenschaften, insbesondere Warmschwingfestigkeit, bewirkt.The addition of magnesium silicide or silicon to the magnesium or magnesium alloy melt leads to an excretion of finely lamellar, eutectic and solid primarily excreted magnesium silicide during solidification, which has good strength properties, in particular high fatigue strength, at high component temperatures.
Durch die Zugabe von 0,25 bis 7,0 Masse-% Magnesiumsilizid bzw. 0,1 bis 2,5 Masse-% Silizium zu der Magnesium- bzw. Magnesiumlegierungsschmelze entstehen Gefüge, die nach Art eines Netzwerks von Magnesiumsilizid des Eutektikums eine ausgezeichnete Festigkeit (Zusammenhalt) des Bauteils bei erhöhten Temperaturen hervorrufen und neben Magnesium überwiegend Magnesiumsilizid-Phase in feinlamellarer eutektischer Form enthalten.The addition of 0.25 to 7.0% by mass of magnesium silicide or 0.1 to 2.5% by mass of silicon to the magnesium or magnesium alloy melt creates structures which, in the manner of a network of magnesium silicide of the eutectic, have excellent strength (Cohesion) of the component at elevated temperatures and contain mainly magnesium silicide phase in fine lamellar eutectic form in addition to magnesium.
Durch eine Zugabe von mehr als 3,6 Masse-% Magnesiumsilizid bzw. von mehr als 1,3 Masse-% Silizium zu der Magnesium- bzw. Magnesiumlegierungsschmelze entsteht ein bimodales Gefüge, das aus massivem primär ausgeschiedenem Magnesiumsilizid und Magnesium/Magnesiumsilizid-Eutektikum besteht und einen wesentlichen Beitrag zur Verbesserung der Warmfestigkeit leistet.By adding more than 3.6% by mass of magnesium silicide or more than 1.3% by mass of silicon to the magnesium or magnesium alloy melt, a bimodal structure is formed which consists of solid primarily excreted magnesium silicide and magnesium / magnesium silicide eutectic and makes a significant contribution to improving the heat resistance.
Nach der besonderen Ausführungsform der Erfindung enthält die Bauteilmatrix > 1 bis 50 Masse-%, vorzugsweise 3 bis 50 Masse-%, Magnesiumsilizid.According to the special embodiment of the invention, the component matrix contains> 1 to 50% by mass, preferably 3 to 50% by mass, magnesium silicide.
Die aus Magnesium bzw. Magnesiumlegierungen gegossenen Bauteile enthalten alle Magnesiumsilizid in eutektischer und primärer Form und zwar vorzugsweise im Konzentrationsbereich von > 0,3 bis 18 Masse-% Silizium.The components cast from magnesium or magnesium alloys all contain magnesium silicide in eutectic and primary form, preferably in the concentration range from> 0.3 to 18% by mass of silicon.
Die vorzugsweise in Betracht kommenden Magnesiumlegierungen bestehen aus 6 bis 9 % Aluminium, 0,13 % Mangan, 0,68 bis 0,7 % Zink, Rest Magnesium und 3,5 % Selten-Erden, 5,25 % Yttrium, 0,5 % Zirkonium, Rest Magnesium.The preferred magnesium alloys consist of 6 to 9% aluminum, 0.13% manganese, 0.68 to 0.7% zinc, balance magnesium and 3.5% rare earth, 5.25% yttrium, 0.5 % Zirconium, balance magnesium.
Im Rahmen der Ausgestaltung der Erfindung enthält die Bauteilmatrix bis zu 12 Masse-% Aluminium und/oder Zink, die durch Ausscheidungen die Kolbenfestigkeit erhöhen.Within the scope of the embodiment of the invention, the component matrix contains up to 12% by mass of aluminum and / or zinc, which increase the piston strength through precipitations.
Eine Steigerung der Festigkeit, insbesondere Warmfestigkeit, ergibt sich durch den Zusatz von bis zu 16 Masse-% Silber.An increase in strength, in particular heat resistance, results from the addition of up to 16% by mass of silver.
Um den gelösten Wasserstoff zu gettern, kann die Bauteilmatrix noch bis zu 1 Masse-% Zirkonium und/oder Titan enthalten, die zusätzlich eine kornfeinende Wirkung hervorrufen.In order to getter the dissolved hydrogen, the component matrix can still contain up to 1% by mass of zirconium and / or titanium, which additionally produce a grain-refining effect.
Durch die Zugabe von bis zu 7 Masse-% eines oder mehrerer Selten-Erdmetalle wird die Kriechfestigkeit verbessert. Speziell durch den Zusatz von bis zu 7 Masse-% Lithium wird die Dichte des Magnesiumwerkstoffs herabgesetzt.The creep resistance is improved by adding up to 7% by mass of one or more rare earth metals. The density of the magnesium material is reduced especially by the addition of up to 7% by mass of lithium.
Die Aushärtung des gegossenen Bauteils kann erfindungsgemäß durch den Zusatz von bis zu 1 Masse- % eines oder mehrerer der Metalle Mangan, Kupfer, Kobalt, Nickel und Chrom beschleunigt werden.According to the invention, the hardening of the cast component can be accelerated by adding up to 1% by mass of one or more of the metals manganese, copper, cobalt, nickel and chromium.
In die Bauteilmatrix können keramische Fasern, vorzugsweise bestehend aus Aluminiumoxid, Siliziumkarbid, Kohlenstoff, Aluminiumnitrid oder Siliziumnitrid, eingebettet sein, wobei zweckmäßigerweise Faserformkörper angeordnet sind.Ceramic fibers, preferably consisting of aluminum oxide, silicon carbide, carbon, aluminum nitride or silicon nitride, can be embedded in the component matrix, fiber shaped bodies being expediently arranged.
Die Erfindung ist im folgenden anhand eines Ausführungsbeispiels näher erläutert.The invention is explained in more detail below using an exemplary embodiment.
Fig. 1 zeigt einen Schnitt durch einen aus Kolbenboden (1) mit Brennraummulde (2), Ringpartie (3) und Schaftpartie (4) mit Kolbenbolzenbohrungen (5) bestehenden, aus Magnesium gegossenen Kolben für Verbrennungskraftmaschinen entlang der die Kolbenachse und die Kolbenbolzenachse umfassenden Ebene.Fig. 1 shows a section through a piston crown (1) with combustion chamber trough (2), ring section (3) and shaft section (4) with piston pin bores (5) consisting of magnesium cast pistons for internal combustion engines along the plane comprising the piston axis and the piston pin axis .
Bei dem in der Fotografie gemäß Fig. 2 in 200facher lichtmikroskopischer Vergrößerung dargestellten Gefügeausschnitt (X) aus der Matrix des Kolbens bilden ca. 50 Vol.-% massives primär ausgeschiedenes dunkelgrau gefärbtes Magnesiumsilizid (6), das von hellgrau gefärbtem Magnesium (7) mit darin eingelagertem feinlamellarem eutektischem Magnesiumsilizid umgeben ist.In the microstructure section (X) shown in the photograph according to FIG. 2 in 200 times magnification by light microscope, approx. 50 vol is surrounded by fine lamellar eutectic magnesium silicide.
Der Werkstoff besitzt die in nachfolgender Tabelle angeführten Eigenschaften. Im Vergleich dazu sind die gleichen Eigenschaften für eine übliche Aluminiumkolbenlegierung des Typs AISi12CuNiMg angegeben.The material has the properties listed in the table below. In comparison, the same properties are given for a common aluminum piston alloy of the type AISi12CuNiMg.
Die mit der Erfindung erzielten Vorteile sind insbesondere darin zu sehen, daß gegenüber den üblicherweise für die Kolbenherstellung eingesetzten Aluminium-Silizium-Legierungen die Dichte um wenigstens 30 % reduziert wird, wobei jedoch eine ähnliche, ausreichend große Warmfestigkeit erhalten bleibt.The advantages achieved by the invention are to be seen in particular in that the density is reduced by at least 30% compared to the aluminum-silicon alloys usually used for the manufacture of pistons, but a similar, sufficiently high heat resistance is retained.
Claims (9)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4030094 | 1990-09-22 | ||
| DE4030094 | 1990-09-22 | ||
| DE4125014A DE4125014A1 (en) | 1990-09-22 | 1991-07-27 | COMPONENTS FOR ENGINES AND VEHICLES |
| DE4125014 | 1991-07-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0478025A1 true EP0478025A1 (en) | 1992-04-01 |
Family
ID=25897109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91202112A Withdrawn EP0478025A1 (en) | 1990-09-22 | 1991-08-19 | Components for engines and vehicles |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0478025A1 (en) |
| JP (1) | JPH04263037A (en) |
| BR (1) | BR9104044A (en) |
| DE (1) | DE4125014A1 (en) |
| NO (1) | NO913293L (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1172554A2 (en) * | 2000-07-14 | 2002-01-16 | Kabushiki Kaisha Toyota Jidoshokki | Swash plate compressor piston shoes |
| WO2005046911A1 (en) * | 2003-11-07 | 2005-05-26 | Mahle Gmbh | Method for producing metal matrix composite materials |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2582027B2 (en) * | 1993-03-26 | 1997-02-19 | 三井金属鉱業株式会社 | Manufacturing method of magnesium alloy casting |
| WO2015029661A1 (en) * | 2013-08-30 | 2015-03-05 | 日立工機株式会社 | Engine and engine work machine provided with same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE392022C (en) * | 1922-12-29 | 1924-03-15 | Griesheim Elektron Chem Fab | Magnesium alloys |
| FR568584A (en) * | 1922-09-19 | 1924-03-28 | Griesheim Elektron Chem Fab | Piston for internal combustion engine |
| DE397346C (en) * | 1922-11-18 | 1924-06-20 | Griesheim Elektron Chem Fab | Process for the production of magnesium-silicon alloys |
| US3162552A (en) * | 1961-06-02 | 1964-12-22 | Dow Chemical Co | Magnesium-base extrusion alloy |
| GB1034227A (en) * | 1964-06-04 | 1966-06-29 | Magnesium Elektron Ltd | Improvements in or relating to magnesium base alloys |
| DE1433108A1 (en) * | 1961-06-02 | 1968-10-17 | Knapsack Ag | Silicon-containing, corrosion-resistant magnesium alloys with a fine-grained solidification structure and process for their production |
-
1991
- 1991-07-27 DE DE4125014A patent/DE4125014A1/en not_active Withdrawn
- 1991-08-19 EP EP91202112A patent/EP0478025A1/en not_active Withdrawn
- 1991-08-22 NO NO91913293A patent/NO913293L/en unknown
- 1991-09-10 BR BR919104044A patent/BR9104044A/en unknown
- 1991-09-20 JP JP3270375A patent/JPH04263037A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR568584A (en) * | 1922-09-19 | 1924-03-28 | Griesheim Elektron Chem Fab | Piston for internal combustion engine |
| DE397346C (en) * | 1922-11-18 | 1924-06-20 | Griesheim Elektron Chem Fab | Process for the production of magnesium-silicon alloys |
| DE392022C (en) * | 1922-12-29 | 1924-03-15 | Griesheim Elektron Chem Fab | Magnesium alloys |
| US3162552A (en) * | 1961-06-02 | 1964-12-22 | Dow Chemical Co | Magnesium-base extrusion alloy |
| DE1433108A1 (en) * | 1961-06-02 | 1968-10-17 | Knapsack Ag | Silicon-containing, corrosion-resistant magnesium alloys with a fine-grained solidification structure and process for their production |
| GB1034227A (en) * | 1964-06-04 | 1966-06-29 | Magnesium Elektron Ltd | Improvements in or relating to magnesium base alloys |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1172554A2 (en) * | 2000-07-14 | 2002-01-16 | Kabushiki Kaisha Toyota Jidoshokki | Swash plate compressor piston shoes |
| EP1172554A3 (en) * | 2000-07-14 | 2004-04-28 | Kabushiki Kaisha Toyota Jidoshokki | Swash plate compressor piston shoes |
| WO2005046911A1 (en) * | 2003-11-07 | 2005-05-26 | Mahle Gmbh | Method for producing metal matrix composite materials |
| CN100402191C (en) * | 2003-11-07 | 2008-07-16 | 马勒有限公司 | Method for producing metal matrix composite materials |
| US8282748B2 (en) | 2003-11-07 | 2012-10-09 | Mahle Gmbh | Process for producing metal matrix composite materials |
Also Published As
| Publication number | Publication date |
|---|---|
| NO913293L (en) | 1992-03-23 |
| NO913293D0 (en) | 1991-08-22 |
| BR9104044A (en) | 1992-06-02 |
| DE4125014A1 (en) | 1992-03-26 |
| JPH04263037A (en) | 1992-09-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE102004058318B4 (en) | Use of a copper-zinc alloy | |
| EP0080590B1 (en) | Wear-resistant cast iron containing spheroidal graphite, and process for its manufacture | |
| EP0432810A1 (en) | Pressure cast light metal piston for internal combustion engines | |
| DE2540542C2 (en) | Cast aluminum product with sintered iron insert | |
| DE19780253C2 (en) | Cast iron and piston ring | |
| DE2428821A1 (en) | WEAR-RESISTANT CAST IRON ALLOY WITH LAMELLAR TO BONE-SHAPED GRAPHITE EXECUTION | |
| EP2155920A1 (en) | Use of an al-mn alloy for high temperature resistant products | |
| DE19810544B4 (en) | Metallic, porous product and method of making the same | |
| EP2920334B1 (en) | Method for producing an engine component, engine component, and use of an aluminium alloy | |
| DE2819310A1 (en) | SINTERED IRON-BASED ALLOY FOR VALVE SEATS AND PROCESS FOR THEIR PRODUCTION | |
| EP1725762A1 (en) | Piston for an internal combustion engine, method for producing said piston and use of a copper alloy in the production of a piston | |
| DE4104680C2 (en) | Light alloy pistons for internal combustion engines | |
| DE60300728T2 (en) | Iron-based sintered alloy for use as a valve seat | |
| DE10049598C2 (en) | Process for producing a cast iron material | |
| DE102004007704A1 (en) | Production of a material based on an aluminum alloy used for producing motor vehicle engine components comprises forming an aluminum base alloy containing silicon and magnesium, hot deforming and heat treating | |
| DE2406070A1 (en) | SLIDING SEAL FOR COMBUSTION ENGINES | |
| EP0478025A1 (en) | Components for engines and vehicles | |
| EP2052096B1 (en) | Steel piston ring | |
| DE3300582C2 (en) | Process for the powder metallurgical production of ring carriers | |
| DE19539498B4 (en) | Wear-resistant synchronizer ring made of a copper alloy | |
| WO2022053483A1 (en) | Piston for an internal combustion engine, internal combustion engine with a piston, and use of an iron-based alloy | |
| EP0130177B1 (en) | Sintered iron-base alloy | |
| DE3842812A1 (en) | CAST LIGHT MATERIAL | |
| DE1154642B (en) | Aluminum-containing multicomponent bronzes, which are particularly characterized by high heat resistance and chemical resistance | |
| DE19724899C2 (en) | Highly heat-resistant magnesium material, especially for piston construction |
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): AT DE ES FR GB IT SE |
|
| 17P | Request for examination filed |
Effective date: 19920928 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: KOLBENSCHMIDT AKTIENGESELLSCHAFT |
|
| 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: 19930903 |