WO2020207829A1 - Piston for an internal combustion engine - Google Patents

Piston for an internal combustion engine Download PDF

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Publication number
WO2020207829A1
WO2020207829A1 PCT/EP2020/058792 EP2020058792W WO2020207829A1 WO 2020207829 A1 WO2020207829 A1 WO 2020207829A1 EP 2020058792 W EP2020058792 W EP 2020058792W WO 2020207829 A1 WO2020207829 A1 WO 2020207829A1
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WO
WIPO (PCT)
Prior art keywords
weight
piston
additionally contains
alloy
piston according
Prior art date
Application number
PCT/EP2020/058792
Other languages
German (de)
French (fr)
Inventor
Thomas Steffens
Holger Germann
Original Assignee
Ks Kolbenschmidt Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ks Kolbenschmidt Gmbh filed Critical Ks Kolbenschmidt Gmbh
Publication of WO2020207829A1 publication Critical patent/WO2020207829A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent

Definitions

  • the present invention relates to a piston for an internal combustion engine based on an aluminum alloy with an increased iron content.
  • the production of pistons for internal combustion engines from aluminum alloys with iron as an alloy component is known and is described in a large number of publications such as DE 10 2007 056 298 A1 or DE 10 2012 018 934 A1.
  • the present invention therefore relates to a piston for an internal combustion engine, consisting of an alloy which fulfills these tasks and does not require any further coating.
  • the alloy used according to the invention contains at least 71% by weight of aluminum, 10.0 to 13.5% by weight of silicon and 0.7 to 2.5% by weight, preferably 0.9 to 1.5% by weight of iron.
  • wt% relates to the sum of the weight proportions of the alloy components.
  • composition and morphology of the precipitation phase of the alloy used according to the invention can be influenced by a suitable combination with transition metals of the 4th period such as Ti, Vn Cr, Mn, Fe, Co, Ni, Cu and Zn.
  • transition metals of the 4th period such as Ti, Vn Cr, Mn, Fe, Co, Ni, Cu and Zn.
  • the alloy of the pistons according to the invention can contain further components, such as one or more of the metals selected from the group 2.0 to 6.0% by weight, preferably 2.5 to 5.0% by weight copper; 1.0 to 3.0 wt%, preferably 1.0 to 3.0 wt% nickel; 0.1 to 0.3 wt%, preferably 0.1 to 0.2 wt% zirconium; 0.1 to 0.2 wt%, preferably 0.1 to 0.2 wt% vanadium; 0.1 to 0.3 wt%, preferably 0.1 to 0.2 wt% titanium; 0 to 1.2 wt%, preferably 0 to 0.4 wt% manganese; 0 to 1.0% by weight, preferably 0 to 0.1% by weight, magnesium; 0 to 0.2 wt% chromium; 0 to 0.2 wt% cobalt and 0 to 0.5 wt% zinc.
  • the metals selected from the group 2.0 to 6.0% by weight, preferably 2.5 to 5.0% by weight copper

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

The invention relates to a piston for an internal combustion engine, based on an alloy containing at least 71 wt. % aluminium, 10 - 13.5 wt. % silicon and 0.7 - 2.5 wt.% iron.

Description

KOLBEN FÜR EINEN VERBRENNUNGSMOTOR PISTON FOR A COMBUSTION ENGINE
Beschrei bung Description
Die vorliegende Erfindung betrifft einen Kolben für einen Verbrennungsmotor basierend auf einer Aluminium-Legierung mit erhöhtem Eisengehalt. Die Herstellung von Kolben für Verbrennungsmotoren aus Aluminium-Legierungen mit Eisen als Legierungsbestandteil ist bekannt und in einer Vielzahl an Publikationen wie DE 10 2007 056 298 A1 oder DE 10 2012 018 934 A1 beschrieben. The present invention relates to a piston for an internal combustion engine based on an aluminum alloy with an increased iron content. The production of pistons for internal combustion engines from aluminum alloys with iron as an alloy component is known and is described in a large number of publications such as DE 10 2007 056 298 A1 or DE 10 2012 018 934 A1.
Die bekannten Legierungen haben im Einsatz in Verbrennungsmotoren verschiedene Vor- aber auch Nachteile. Nun steigen einerseits die Anforderungen der Gesetzgebung an Kraftstoffverbrauch bzw. CO2 Emission, andererseits aber auch die Anforderungen der Automobilhersteller an Ermüdungsfestigkeit, Verschleißbeständigkeit und Kriechbeständigkeit solcher Kolben. Neben den gestiegenen technischen Anforderungen besteht zudem die Anforderung an ein preiswertes Herstel Verfahren der Kolben ohne aufwändige Nachbearbeitungsschritte wie funktionelle Beschichtungen. The known alloys have various advantages but also disadvantages when used in internal combustion engines. Now, on the one hand, the legislative requirements for fuel consumption and CO2 emissions are increasing, but on the other hand, the requirements of the automobile manufacturers for fatigue resistance, wear resistance and creep resistance of such pistons are also increasing. In addition to the increased technical requirements, there is also the requirement for an inexpensive manufacturing process for the pistons without complex post-processing steps such as functional coatings.
Gegenstand der vorliegenden Erfindung ist daher ein Kolben für einen Verbrennungsmotor, bestehend aus einer Legierung, die diese Aufgaben erfüllt und keine weitere Beschichtung benötigt. Die erfindungsgemäß eingesetzte Legierung enthält mindestens 71 Gew% Aluminium, 10,0 bis 13.5 Gew% Silizium und 0,7 bis 2,5 Gew%, bevorzugt 0,9 bis 1 ,5 Gew% Eisen. The present invention therefore relates to a piston for an internal combustion engine, consisting of an alloy which fulfills these tasks and does not require any further coating. The alloy used according to the invention contains at least 71% by weight of aluminum, 10.0 to 13.5% by weight of silicon and 0.7 to 2.5% by weight, preferably 0.9 to 1.5% by weight of iron.
Die Angabe „Gew%“ bezieht sich auf die Summe der Gewichtsanteile Legierungsbestandteile. The specification “wt%” relates to the sum of the weight proportions of the alloy components.
Durch eine geeignete Kombination mit Übergangsmetallen der 4. Periode wie Ti, Vn Cr, Mn, Fe, Co, Ni, Cu und Zn kann die Zusammensetzung und Morphologie der Ausscheidungsphase der erfindungsgemäß eingesetzten Legierung beeinflusst werden. Hierdurch können insbesondere Ali5(M3Si2)-Phasen (mit M = gleich oder unterschiedlich Fe, Mn, Ni und/oder Cu) gebildet werden die eine optimierte 3- dimensionale Interkonnektivität besitzen. The composition and morphology of the precipitation phase of the alloy used according to the invention can be influenced by a suitable combination with transition metals of the 4th period such as Ti, Vn Cr, Mn, Fe, Co, Ni, Cu and Zn. In this way, in particular Ali5 (M3Si2) phases (with M = identical or different Fe, Mn, Ni and / or Cu) can be formed which have an optimized 3-dimensional interconnectivity.
Die Legierung der erfindungsgemäßen Kolben können weitere Bestandteile enthalten, wie eine oder mehrere der Metalle ausgewählt aus der Gruppe 2,0 bis 6,0 Gew%, bevorzugt 2,5 bis 5,0 Gew% Kupfer; 1 ,0 bis 3,0 Gew%, bevorzugt 1 ,0 bis 3,0 Gew% Nickel; 0,1 bis 0,3 Gew%, bevorzugt 0,1 bis 0,2 Gew% Zirkonium; 0,1 bis 0,2 Gew%, bevorzugt 0,1 bis 0,2 Gew% Vanadium; 0,1 bis O,3 Gew%, bevorzugt 0,1 bis O,2 Gew% Titan; 0 bis 1 ,2 Gew%, bevorzugt 0 bis 0,4 Gew% Mangan; 0 bis 1 ,0 Gew%, bevorzugt 0 bis 0,1 Gew% Magnesium; 0 bis 0,2 Gew% Chrom; 0 bis 0,2 Gew% Cobalt und 0 bis 0,5 Gew% Zink. The alloy of the pistons according to the invention can contain further components, such as one or more of the metals selected from the group 2.0 to 6.0% by weight, preferably 2.5 to 5.0% by weight copper; 1.0 to 3.0 wt%, preferably 1.0 to 3.0 wt% nickel; 0.1 to 0.3 wt%, preferably 0.1 to 0.2 wt% zirconium; 0.1 to 0.2 wt%, preferably 0.1 to 0.2 wt% vanadium; 0.1 to 0.3 wt%, preferably 0.1 to 0.2 wt% titanium; 0 to 1.2 wt%, preferably 0 to 0.4 wt% manganese; 0 to 1.0% by weight, preferably 0 to 0.1% by weight, magnesium; 0 to 0.2 wt% chromium; 0 to 0.2 wt% cobalt and 0 to 0.5 wt% zinc.

Claims

Patentansprüche Claims
1. Kolben für einen Verbrennungsmotor, basierend auf einer Legierung enthaltend mindestens 71 Gew% Aluminium, 10,0 bis 13.5 Gew% Silizium und 0,7 bis 2,5 Gew% Eisen. 1. Piston for an internal combustion engine, based on an alloy containing at least 71% by weight of aluminum, 10.0 to 13.5% by weight of silicon and 0.7 to 2.5% by weight of iron.
2. Kolben nach Anspruch 1 , dadurch gekennzeichnet, dass die Legierung zusätzlich 2,0 bis 6,0 Gew% Kupfer enthält. 2. Piston according to claim 1, characterized in that the alloy additionally contains 2.0 to 6.0% by weight of copper.
3. Kolben nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Legierung zusätzlich 1 ,0 bis 3,0 Gew% Nickel enthält. 3. Piston according to claim 1 or 2, characterized in that the alloy additionally contains 1.0 to 3.0% by weight of nickel.
4. Kolben nach Anspruch 1 , 2 oder 3, dadurch gekennzeichnet, dass die Legierung zusätzlich 0,1 bis 0,3 Gew% Zirkonium enthält. 4. Piston according to claim 1, 2 or 3, characterized in that the alloy additionally contains 0.1 to 0.3% by weight of zirconium.
5. Kolben nach Anspruch 1 , 2, 3 oder 4, dadurch gekennzeichnet, dass die5. Piston according to claim 1, 2, 3 or 4, characterized in that the
Legierung zusätzlich 0,1 bis 0,3 Gew% Vanadium enthält. Alloy additionally contains 0.1 to 0.3% by weight of vanadium.
6. Kolben nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Legierung zusätzlich 0,1 bis 0,3 Gew% Titan enthält. 6. Piston according to one of the preceding claims, characterized in that the alloy additionally contains 0.1 to 0.3% by weight of titanium.
7. Kolben nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Legierung zusätzlich 0 bis 1 ,2 Gew% Mangan enthält. 7. Piston according to one of the preceding claims, characterized in that the alloy additionally contains 0 to 1, 2% by weight of manganese.
8. Kolben nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Legierung zusätzlich 0 bis 1 ,0 Gew% Magnesium enthält. 8. Piston according to one of the preceding claims, characterized in that the alloy additionally contains 0 to 1, 0% by weight of magnesium.
9. Kolben nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Legierung zusätzlich 0 bis 0,2 Gew% Cobalt enthält. 9. Piston according to one of the preceding claims, characterized in that the alloy additionally contains 0 to 0.2% by weight of cobalt.
10. Kolben nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Legierung zusätzlich 0 bis 0,2 Gew% Chrom enthält. 10. Piston according to one of the preceding claims, characterized in that the alloy additionally contains 0 to 0.2% by weight of chromium.
11. Kolben nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Legierung zusätzlich 0 bis 0,5 Gew% Zink enthält. 11. Piston according to one of the preceding claims, characterized in that the alloy additionally contains 0 to 0.5% by weight of zinc.
12. Verfahren zur Herstellung eines Kolbens für einen Verbrennungsmotor, basierend auf einer Legierung enthaltend mindestens 71 Gew% Aluminium, 10,0 bis12. A method for producing a piston for an internal combustion engine, based on an alloy containing at least 71% by weight of aluminum, 10.0 to
13.5 Gew% Silizium und 0,7 bis 2,5 Gew% Eisen durch Kokillenguss. 13.5% by weight of silicon and 0.7 to 2.5% by weight of iron by permanent mold casting.
PCT/EP2020/058792 2019-04-09 2020-03-27 Piston for an internal combustion engine WO2020207829A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019109272.8 2019-04-09
DE102019109272 2019-04-09

Publications (1)

Publication Number Publication Date
WO2020207829A1 true WO2020207829A1 (en) 2020-10-15

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ID=70154381

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DE (1) DE102020108585A1 (en)
WO (1) WO2020207829A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0924310A1 (en) * 1997-12-20 1999-06-23 Federal-Mogul Bradford Limited Aluminium alloy containing silicon for use as pistons in automobiles
DE102007056298A1 (en) 2007-11-22 2009-05-28 Bayerische Motoren Werke Aktiengesellschaft Piston for internal combustion engine, suitable for use in motor sports, is hardened by very rapid cooling of specified composition
US20130115129A1 (en) * 2010-07-16 2013-05-09 Nippon Light Metal Company, Ltd. Aluminum alloy excellent in high temperature strength and heat conductivity and method of production of same
DE102012018934A1 (en) 2012-09-26 2014-03-27 Audi Ag Preparation of aluminum-iron alloy semi-finished product e.g. brake rotor, involves casting aluminum-iron alloy containing iron, copper, vanadium and element chosen from silicon, zinc and boron, and aluminum, cooling, and extruding
WO2014076174A1 (en) * 2012-11-14 2014-05-22 Federal-Mogul Nürnberg GmbH Method for producing an engine component, engine component, and use of an aluminium alloy
JP2014109045A (en) * 2012-11-30 2014-06-12 Isuzu Motors Ltd Aluminium alloy

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0924310A1 (en) * 1997-12-20 1999-06-23 Federal-Mogul Bradford Limited Aluminium alloy containing silicon for use as pistons in automobiles
DE102007056298A1 (en) 2007-11-22 2009-05-28 Bayerische Motoren Werke Aktiengesellschaft Piston for internal combustion engine, suitable for use in motor sports, is hardened by very rapid cooling of specified composition
US20130115129A1 (en) * 2010-07-16 2013-05-09 Nippon Light Metal Company, Ltd. Aluminum alloy excellent in high temperature strength and heat conductivity and method of production of same
DE102012018934A1 (en) 2012-09-26 2014-03-27 Audi Ag Preparation of aluminum-iron alloy semi-finished product e.g. brake rotor, involves casting aluminum-iron alloy containing iron, copper, vanadium and element chosen from silicon, zinc and boron, and aluminum, cooling, and extruding
WO2014076174A1 (en) * 2012-11-14 2014-05-22 Federal-Mogul Nürnberg GmbH Method for producing an engine component, engine component, and use of an aluminium alloy
JP2014109045A (en) * 2012-11-30 2014-06-12 Isuzu Motors Ltd Aluminium alloy

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