EP1907684A1 - Method of producing a piston for an internal combustion engine and piston for an internal combustion engine - Google Patents
Method of producing a piston for an internal combustion engine and piston for an internal combustion engineInfo
- Publication number
- EP1907684A1 EP1907684A1 EP06754607A EP06754607A EP1907684A1 EP 1907684 A1 EP1907684 A1 EP 1907684A1 EP 06754607 A EP06754607 A EP 06754607A EP 06754607 A EP06754607 A EP 06754607A EP 1907684 A1 EP1907684 A1 EP 1907684A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- melt
- internal combustion
- combustion engine
- treated
- 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.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/10—Pistons having surface coverings
- F02F3/12—Pistons having surface coverings on piston heads
- F02F3/14—Pistons having surface coverings on piston heads within combustion chambers
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/26—Pistons having combustion chamber in piston head
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49249—Piston making
Definitions
- the invention relates to a method for producing a piston with a combustion bowl for an internal combustion engine and such a piston for an internal combustion engine.
- Pistons are constantly subjected to changes in operating conditions in internal combustion engines. Every start and / or AbsehaltVorgang and every change of a load case leads to a strong change in the temperature distribution in the piston. These changes in the temperature distributions cause internal stresses which can lead to plastic deformation and ultimately failure of the piston.
- the invention has for its object to provide a method for producing an engine piston and an engine piston, by means of which the life and reliability of an engine piston is further increased.
- a region of the combustion bowl comprising at least one depression base is melt-treated, such that a structure of the material in the melt-treated region is changed in a layer having a definable depth.
- the material is "remelted" in the melt-treated area.
- the material has an altered structure, for example a changed particle size, relative to the underlying material of the piston. so that sets a finer microstructure.
- the finer structure better withstands changing loads.
- the depth of the layer is determined appropriately. It can range from a few to a few mm. The depth is determined so that a structure of the material is changed.
- the remelting counteracts a failure of the piston in the trough bottom, for example due to changes in the temperature distribution, so that the service life of the piston is prolonged.
- tools used for the melting treatment are appropriately adapted to the geometry of the trough base.
- the area is heated by arc welding process, laser and / or electron beam and / or remelted by an inductive heating.
- arc welding process laser and / or electron beam and / or remelted by an inductive heating.
- other forms of energy input are also conceivable.
- the area is heated by an energy input with a power between 2 and 8kW.
- a depth of the melt-treated layer can be influenced.
- the melt-treated area is subsequently cooled at a cooling rate or rate of 100-1000 K / s.
- a cooling rate or rate of 100-1000 K / s In technical remelting processes, solidification rates are possible within a very wide range, namely between 10 3 and 10 " 10 K / s the higher the cooling rate, the finer the particles crystallize in the melt.
- the cooling rate of 100-1000 K / s for pistons with silicon content has proven to be particularly favorable. However, the rate can be exceeded or undershot, at least for pistons without silicon content.
- the preferred cooling rate of 100-1000 K / s was determined as follows. It has been determined by experiments that the cooling rate must be at least 100 K / s, so that a sufficient proportion of the primary silicon, which may be present in the piston to be produced, is sufficiently fine, so that dispersion hardening of the material occurs. A slower solidification would lead to a coarser structure, which does not have the desired properties. Thus, as a minimum cooling rate, 100 K / s can be given for certain piston materials.
- a piston which consists of an alloy is preferably machined by the method according to the invention.
- the alloy has a main alloying element and at least one further alloying element.
- the resistance to thermal fatigue can be improved by introducing the main alloying element.
- this embodiment differs from the hitherto conventionally chosen approaches.
- strength-increasing elements such as silicon, nickel, copper or magnesium, introduced.
- Such alloying elements for example, locally increase the strength of an aluminum alloy piston. It was always assumed that by increasing the strength-increasing alloying element, the properties with regard to thermal shock resistance can also be improved.
- the effect according to the invention can be achieved by introducing the main alloying element in pure form as an additional material.
- the same effect can be produced by incorporating an alloy containing the main alloying element and at least one alloying element of the bulb alloy, but which is present in the filler material at a lower concentration than in the piston to be treated. This also partially reduces the concentration of the alloying element and increases the thermal stability of the piston, at least in this area.
- this process step is basically independent of other features of the invention, in particular the specified cooling rate.
- the heat resistance can be improved by melting the piston at least in regions by means of a welding process, and introducing the main alloy element as a filler, so that the concentration of the main alloy element is increased at least in some regions.
- all other features mentioned above and below can be advantageously used.
- the piston according to the invention which may have a finer structure and an increased concentration of the main alloy element at least in some areas compared to other areas, without particles of the size specified below for the piston according to the invention.
- the features of the piston according to the invention can also be combined with one another in a manner described herein.
- the piston is remelted in a layer having a depth greater than 200 microns, especially at least 300 microns. This achieves a change in the structure of the material.
- the piston is additionally treated and / or processed on the surface.
- the remelting process is thus not always the last processing step. Further processing steps, for example, for a smoothing of the surface can connect.
- an area adjacent thereto is melt-treated in addition to the trough base.
- a remelting treatment it is conceivable to subject the entire combustion bowl to a remelting treatment.
- low solidification rates are achieved, inter alia, by the fact that a melt-treated area is spatially limited. If a larger area to be remelted, a treatment in several steps is preferable.
- a piston for an internal combustion engine wherein the piston has a combustion bowl, the combustion bowl is melt-treated in a region comprising at least the well base and a material in the melt-treated area is remelted, so that a structure of the material in the melt-treated Range is changed compared to the untreated areas of the remaining piston in a layer with a definable depth.
- An expected life of a piston with remelted trough bottom is considerably higher than that of conventional pistons.
- the material structure in the melt-treated area is preferably modified in a layer having a depth of more than 200 ⁇ m, in particular more than 300 ⁇ m.
- the piston has a finer structure in the melt-treated area compared to untreated areas of the piston, preferably with particles smaller than 10 ⁇ 6 m .
- the piston is preferably provided as a diesel piston. Diesel pistons, in particular truck pistons, are exposed to special thermal loads. A reinforcement of the trough bottom by remelting is particularly advantageous.
- the figure shows schematically a piston 1 of an internal combustion engine with a combustion chamber trough 2.
- the transition between the piston head 3 and the combustion chamber trough 2 is referred to as trough edge.
- the bottom of the combustion bowl 2 is referred to as a trough base 20.
- the trough base 20 is at least partially remelted.
- the remelting is preferably carried out by an arc welding process.
- the surface of the piston 1 is melted by the arc in the region of the trough base 20.
- a subsequent solidification speed is many times higher than in a casting of the piston 1. As a result, a finer microstructure arises in the remelted region of the hollow bottom 20 than in the remaining piston 1.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005034905A DE102005034905A1 (en) | 2005-07-26 | 2005-07-26 | Method for producing a piston for an internal combustion engine and pistons for an internal combustion engine |
PCT/EP2006/006262 WO2007012373A1 (en) | 2005-07-26 | 2006-06-28 | Method of producing a piston for an internal combustion engine and piston for an internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1907684A1 true EP1907684A1 (en) | 2008-04-09 |
Family
ID=36975317
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06754607A Ceased EP1907684A1 (en) | 2005-07-26 | 2006-06-26 | Method of producing a piston for an internal combustion engine and piston for an internal combustion engine |
Country Status (5)
Country | Link |
---|---|
US (1) | US20090000470A1 (en) |
EP (1) | EP1907684A1 (en) |
JP (1) | JP2009503320A (en) |
DE (1) | DE102005034905A1 (en) |
WO (1) | WO2007012373A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007044696A1 (en) | 2007-06-29 | 2009-01-08 | Ks Kolbenschmidt Gmbh | Melt-treated bowl rim of a piston combustion bowl |
DE102010001133B4 (en) * | 2010-01-22 | 2016-04-07 | Federal-Mogul Nürnberg GmbH | Method and molding for use in the manufacture of a piston for an internal combustion engine and piston for an internal combustion engine |
DE102011083994A1 (en) * | 2010-10-05 | 2012-04-05 | Ks Kolbenschmidt Gmbh | Improvements to a combustion bowl rim and to a combustion bowl bottom of a piston of an internal combustion engine |
DE102012204947A1 (en) * | 2012-03-28 | 2013-10-02 | Mahle International Gmbh | Method for producing an aluminum piston |
DE102012212791B4 (en) * | 2012-07-20 | 2014-02-27 | Federal-Mogul Nürnberg GmbH | Method for producing a piston for an internal combustion engine |
TWI823932B (en) | 2018-05-11 | 2023-12-01 | 中國大陸商迪哲(江蘇)醫藥有限公司 | Triazolopyrimidine compounds and their use in treating cancer |
DE102019207814A1 (en) * | 2019-05-28 | 2020-12-03 | Federal-Mogul Nürnberg GmbH | Method for remelting a portion of a piston for an internal combustion engine |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3295198A (en) * | 1964-03-13 | 1967-01-03 | Robert L Coan | Process of adhering stainless steel to aluminum and products produced thereby |
US4401726A (en) * | 1974-01-07 | 1983-08-30 | Avco Everett Research Laboratory, Inc. | Metal surface modification |
US4074616A (en) * | 1975-09-02 | 1978-02-21 | Caterpillar Tractor Co. | Aluminum piston with steel reinforced piston ring grooves |
US4157923A (en) * | 1976-09-13 | 1979-06-12 | Ford Motor Company | Surface alloying and heat treating processes |
DE3114124A1 (en) * | 1981-04-08 | 1982-10-28 | Mahle Gmbh, 7000 Stuttgart | ALUMINUM PISTON WITH HARDOXIZED BOTTOM |
JPS59108849A (en) * | 1982-12-14 | 1984-06-23 | Toyota Motor Corp | Piston for internal-combustion engine |
DE3339867A1 (en) * | 1982-12-16 | 1985-05-15 | Kolbenschmidt AG, 7107 Neckarsulm | METHOD FOR THE PRODUCTION OF WEAR-RESISTANT SURFACES OF THE RING GROOVES OF PISTONS, MADE OF ALUMINUM ALLOYS, FOR INTERNAL COMBUSTION ENGINES |
US4643079A (en) * | 1985-03-28 | 1987-02-17 | General Motors Corporation | Iron piston having selectively hardened ring groove |
JPS62167846A (en) * | 1986-01-18 | 1987-07-24 | Toyota Motor Corp | Piston for internal combustion engine made of cast iron and its production |
JPS62170486A (en) * | 1986-01-21 | 1987-07-27 | Toyota Motor Corp | Cast iron piston for internanl combustion engine and its production |
JPH051622A (en) * | 1991-01-28 | 1993-01-08 | Hiratsuka Kinzoku Kogyo Kk | Al alloy piston for internal combustion engine and its manufacture |
JPH08246947A (en) * | 1995-03-13 | 1996-09-24 | Nissan Motor Co Ltd | Manufacture of piston |
DE19902864A1 (en) * | 1999-01-25 | 2000-06-29 | Daimler Chrysler Ag | Piston for IC engines with direct fuel injection has piston head cavity with collar partially formed by spray coating with a metal alloy for increased strength and temperature resistance |
EP1386687B2 (en) * | 2002-07-30 | 2015-02-25 | Federal-Mogul Nürnberg GmbH | Process for making a piston and piston |
DE10335843A1 (en) * | 2003-08-05 | 2005-03-10 | Federal Mogul Nuernberg Gmbh | Process for producing a piston for combustion engines comprises remelting at least one region of the piston by means of inductive heating |
DE102005047035B3 (en) * | 2005-09-30 | 2007-04-19 | Federal-Mogul Nürnberg GmbH | A method of manufacturing a piston for an internal combustion engine and piston produced thereafter |
-
2005
- 2005-07-26 DE DE102005034905A patent/DE102005034905A1/en not_active Withdrawn
-
2006
- 2006-06-26 EP EP06754607A patent/EP1907684A1/en not_active Ceased
- 2006-06-26 US US11/996,758 patent/US20090000470A1/en not_active Abandoned
- 2006-06-26 JP JP2008523154A patent/JP2009503320A/en active Pending
- 2006-06-28 WO PCT/EP2006/006262 patent/WO2007012373A1/en active Application Filing
Non-Patent Citations (4)
Title |
---|
"Energiereiche Strahlen verbessern Eigenschaften von Motorenkolben", ALUMINIUM, ALUMINIUM VERLAG, DUESSELDORF, DE, vol. 62, 1 January 1986 (1986-01-01), pages 1,2,171, XP003021130, ISSN: 0002-6689 * |
"Energiereiche Strahlen verbessern Eigenschaften von Motorenkolben", ALUMINIUM, vol. 62, 1986, pages 1,2,171, XP003021130 |
"Lokale Warmverformung - Elektronen Umschmelzen - Plasmastrahl Umschmelzen", KOLLOQUIUM 1973, 1973, pages 1,25, XP003021131 |
See also references of WO2007012373A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20090000470A1 (en) | 2009-01-01 |
JP2009503320A (en) | 2009-01-29 |
WO2007012373A8 (en) | 2008-05-29 |
DE102005034905A1 (en) | 2007-02-01 |
WO2007012373A1 (en) | 2007-02-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2709844C2 (en) | Process for the production of hollow bodies from AlSi alloys by extrusion or extrusion of granulate and its application | |
EP3365472B1 (en) | Aluminium alloy | |
DE3135943C2 (en) | Aluminum-silicon alloys and processes for their manufacture | |
AT502310B1 (en) | AN AL-ZN-MG-CU ALLOY | |
WO2007012373A1 (en) | Method of producing a piston for an internal combustion engine and piston for an internal combustion engine | |
DE3605519C2 (en) | ||
WO2008125092A1 (en) | Method for producing a structural component made of an aluminum-based alloy using rapid prototyping | |
DE4103934A1 (en) | SUITABLE ALUMINUM ALLOY FOR PISTON | |
DE102019205267B3 (en) | Die-cast aluminum alloy | |
DE102017114162A1 (en) | HIGH STRENGTH AND HIGH CRYAN RESISTANT ALUMINUM ALLOY ALLOYS AND HPDC MOTOR BLOCKS | |
DE102004025600A1 (en) | Electrode material and process for its manufacture | |
DE3344450A1 (en) | ENGINE FASTENERS BASED ON ALUMINUM ALLOYS AND INTERMETALLIC COMPOUNDS AND METHOD FOR THE PRODUCTION THEREOF | |
EP1386687B1 (en) | Process for making a piston and piston | |
DE60114281T2 (en) | Cast and forged product using a copper-based alloy | |
DE19643029A1 (en) | Method for coating an internal combustion engine component made of an aluminum alloy with silicon | |
WO2004104240A2 (en) | High strength thermally resistant ductile cast aluminium alloys | |
DE102017109614A1 (en) | Aluminum alloy casting and manufacturing process | |
EP1680246B1 (en) | Method for producing metal matrix composite materials | |
DE60310298T2 (en) | Aluminum alloy with good cuttability, a method of making a forged article, and the forged article | |
DE102007012845A1 (en) | Production of a partial composite fiber structure in a component via a laser remelting treatment | |
EP0918096B1 (en) | Process of manufacturing a structural element made of a die-cast aluminium alloy | |
DE19915782C2 (en) | Pistons for internal combustion engines | |
DE19535590A1 (en) | Piston for IC engines | |
DE4436670C2 (en) | Objects made of nickel-based superalloys with improved machinability and method for producing a machined workpiece from such a superalloy | |
DE10353474B4 (en) | Component of an internal combustion engine and method for its production |
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 |
|
17P | Request for examination filed |
Effective date: 20071228 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
|
17Q | First examination report despatched |
Effective date: 20080814 |
|
TPAC | Observations filed by third parties |
Free format text: ORIGINAL CODE: EPIDOSNTIPA |
|
DAX | Request for extension of the european patent (deleted) | ||
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R003 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
18R | Application refused |
Effective date: 20140425 |