EP0462850B1 - Procédé de fabrication de pièces en alliage d'aluminium coulé comportant un insert et culasse de moteur à combustion interne obtenue par ce procédé - Google Patents

Procédé de fabrication de pièces en alliage d'aluminium coulé comportant un insert et culasse de moteur à combustion interne obtenue par ce procédé Download PDF

Info

Publication number
EP0462850B1
EP0462850B1 EP19910401295 EP91401295A EP0462850B1 EP 0462850 B1 EP0462850 B1 EP 0462850B1 EP 19910401295 EP19910401295 EP 19910401295 EP 91401295 A EP91401295 A EP 91401295A EP 0462850 B1 EP0462850 B1 EP 0462850B1
Authority
EP
European Patent Office
Prior art keywords
insert
treatment
cylinder head
nickel
layer
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.)
Expired - Lifetime
Application number
EP19910401295
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0462850A1 (fr
Inventor
Michel Barthole
Gilles Le Borgne
Jean-Roch Virot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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 Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0462850A1 publication Critical patent/EP0462850A1/fr
Application granted granted Critical
Publication of EP0462850B1 publication Critical patent/EP0462850B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B22D19/0081—Casting in, on, or around objects which form part of the product pretreatment of the insert, e.g. for enhancing the bonding between insert and surrounding cast metal
    • 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
    • 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
    • B22D19/14—Casting in, on, or around objects which form part of the product the objects being filamentary or particulate in form
    • 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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/36—Cylinder heads having cooling means for liquid cooling
    • F02F1/38—Cylinder heads having cooling means for liquid cooling the cylinder heads being of overhead valve type
    • 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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F2001/008—Stress problems, especially related to thermal stress
    • 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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/247—Arrangement of valve stems in cylinder heads the valve stems being orientated in parallel with the cylinder axis
    • 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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/248—Methods for avoiding thermal stress-induced cracks in the zone between valve seat openings

Definitions

  • the invention generally relates to a method for manufacturing cast aluminum alloy parts with an insert.
  • the present invention finds application in particular in the manufacture of an internal combustion engine cylinder head, provided an insert.
  • a process of manufacture of a casting comprising an insert of material ceramic is known. It consists of depositing on the insert a flexible mattress of ceramic fibers, then place insert it into a mold and finally pour the metal into the mold.
  • the part in alloy forming the cylinder head undergoes large variations in temperature during engine operation, the temperature maximum up to 350 ° C.
  • the part of the breech forming the inter-valve seat areas deteriorates by cracking, deforms when hot and its life decreases in result.
  • the object of the present invention is to overcome the drawbacks mentioned above by proposing a method of manufacturing cast aluminum alloy parts with an insert, where the insert is made of a matrix composite material metallic, which consists of a fiber-based reinforcement alumina or alumina-silica forming felt, impregnated high pressure by an aluminum alloy different from or identical to the casting alloy.
  • the fixing, in particular chemical, between the insert and the cast alloy part must be perfect.
  • a layer of waterproof and non-fusible alumina covers the entire surface of the insert and presents an obstacle to creating a chemical bond between the insert and the part in casting alloy.
  • the invention therefore also aims to create a connection chemical at the insert - part interface.
  • the invention provides a method of manufacturing cast aluminum alloy parts with an insert, which more precisely consists in subjecting a surface to matrix alloy of at least one face of the insert, a chemical treatment of the zincate type, which is followed by at least an electrolytic treatment such as a nickel coating, followed by a second electrolytic treatment such as silver coating to form a silver layer.
  • the processing chemical with zincate forms on the above-mentioned surface a layer of zinc or zinc-iron alloy containing about 15% iron.
  • the processing electrolytic is carried out from a sulfate solution or nickel sulfamate.
  • the subject of the invention is also a cylinder head internal combustion, provided with at least one insert, the cylinder head cast aluminum alloy being produced by the process according to the invention.
  • an insert is arranged within the room.
  • This insert is made beforehand from a composite material which consists of a part of a reinforcing material based on ceramic fibers such as for example alumina fibers or alumina - silica, which are tangled with way of a felt whose cohesion is ensured by a mineral binder, such as for example a binder of silica, and on the other hand a matrix based aluminum and more specifically an alloy aluminum different from or identical to the alloy aluminum of the casting.
  • This alloy of aluminum forming the matrix is also called matrix alloy.
  • This composite material is made by impregnating under high pressure the material of reinforcement by aluminum alloy or alloy matrix in the liquid state.
  • An example of such a material includes a reinforcement short alumina fibers, an AS5U4G2 matrix according to AFNOR standards.
  • the face d it will be used as described below to create a chemical bond to the insert - part interface, which allows fixing chemical between the part and the insert.
  • the insert thus produced is then subjected to chemical treatments.
  • the surface of the face d of the insert will undergo chemical treatment and at least one electrolytic treatment.
  • the face d described above presents on its surface a layer of impermeable alumina and not fuse which hinders subsequent chemical fixation between the insert and the part.
  • the surface d is subjected to a treatment zincate type chemical and preferably of the type zinc - iron.
  • This treatment is carried out using a solution containing zinc oxide, soda, potassium and sodium double tartrate and ferric chloride.
  • this layer has an iron content of around 15%.
  • this layer shown in f is very fine, having a thickness less than 1 micron.
  • this layer f The role of this layer f is to prevent the layer alumina to reform on the surface of the face d of the insert, so it avoids reoxidation surface of the face d of the insert.
  • the surface of the insert that is to say this face f, undergoes an electrolytic treatment for form a coating.
  • a classic coating is for example a deposit nickel electrolytic.
  • the treatment is done in a bath containing nickel sulfate or sulfamate, chloride nickel, and boric acid.
  • a layer g a few microns thick is shape, thereby protecting layer f and limiting the surface reoxidation of the insert having the casting of the room.
  • this layer f allows the diffusion of nickel in the aluminum alloy of casting thus creating the chemical bond at the stage of casting the part.
  • This coating is made from a bath typically containing: double cyanide silver and potassium, potassium cyanide and potassium carbonate.
  • the silver layer h thus obtained, of a thickness a few microns, protects better than nickel the insert surface by more effectively limiting the reoxidation of the insert surface before casting.
  • this silver layer h improves chemical bonding at the insert interface - piece of the fact that the diffusion coefficient of silver in aluminum is higher than that of nickel in aluminum.
  • the faces of the insert thus prepared and treated provide both mechanical attachment and chemical bond at the insert - part interface.
  • the insert that will be placed in the mold for the casting the piece can be in a form temporary, sometimes necessary to maintain it motionless during casting. In this case, it will machined after the casting step, in order to reach its final form.
  • the insert comprising all the layers of coating f and g and possibly h on its face d, is positioned inside the mold. This last one is then closed and the casting of the part can to start.
  • the aluminum alloy of the part is cast according to specific parameters such as the temperature of the insert in the mold, the pouring temperature of the liquid alloy and the quantity of alloy which contact of the insert, heats it during the duration of the pour. All of these parameters taken in combination acts on the creation of a bond chemical at the insert - part interface. A optimal combination of parameters generates a very good chemical bond.
  • the part thus cast comprising an insert, is then unmolded.
  • combustion engine cylinder heads internal, aluminum alloy are so produced.
  • FIG. 3 An example of insert intended to be introduced in a cylinder head, is shown in Figure 3. It has side faces 2 and 3 of concave shape, where will the valves be housed in the areas inter-seats 4 and 5.
  • the insert in cross section according to Figure 4 has a trapezoidal section.
  • the undercuts 6 and 7 are used for fixing mechanics of the insert, and face 8, which will undergo the chemical and electrolytic treatments according to the invention is used for chemical fixing between the insert and the part.
  • the aluminum alloy of the cylinder head is then cast for example by gravity on this material insert composite which has undergone chemical treatments and previously mentioned electrolytics.
  • an insert (or more) is (are) for example arranged at the level of the zones between the valve seats.
  • the insert 1 is housed between two valve inter-seat zones 4 and 5 to inside the cylinder head 9. Valves will come stay in spaces 10 and 11.
  • Figure 6 which is a partial section of the cylinder head shown in Figure 5, shows the insert 1 fixed in particular by its face 8 to the cylinder head 9 by the chemical bond generated by the process of manufacture of the cylinder head.
  • Insert 1 is positioned between spaces 10 and 11 or valve lines, one line the other exhaust pipe.
  • valve heads 12 and 13 respectively come lodge against the insert 1 in the conduits 10 and 11, by coming into contact with insert 1 in the zones 4 and 5.
  • Figure 7 illustrates the positioning of the insert fixed to the within the breech. Valve heads 12 and 13 can move on either side of insert 1.
  • the aluminum alloy cylinder head thus produced comprising an insert in at least one of its zones inter-valve seat, extends the service life of the cylinder head by significantly improving the service life thermal fatigue and the elastic limit in temperature of these inter-valve seat areas.
  • the cylinder head then withstands much better temperature variations during the cycles of engine, compared to conventional cylinder heads.
  • the invention also finds application in the manufacture of other aluminum alloy parts sunk.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
EP19910401295 1990-06-19 1991-05-17 Procédé de fabrication de pièces en alliage d'aluminium coulé comportant un insert et culasse de moteur à combustion interne obtenue par ce procédé Expired - Lifetime EP0462850B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9007667 1990-06-19
FR9007667A FR2663250A1 (fr) 1990-06-19 1990-06-19 Procede de fabrication de pieces en alliage d'aluminium coule comportant un insert et culasse de moteur a combustion interne obtenue par ce procede.

Publications (2)

Publication Number Publication Date
EP0462850A1 EP0462850A1 (fr) 1991-12-27
EP0462850B1 true EP0462850B1 (fr) 1998-08-26

Family

ID=9397788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910401295 Expired - Lifetime EP0462850B1 (fr) 1990-06-19 1991-05-17 Procédé de fabrication de pièces en alliage d'aluminium coulé comportant un insert et culasse de moteur à combustion interne obtenue par ce procédé

Country Status (3)

Country Link
EP (1) EP0462850B1 (enrdf_load_stackoverflow)
DE (1) DE69130038T2 (enrdf_load_stackoverflow)
FR (1) FR2663250A1 (enrdf_load_stackoverflow)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2736968B1 (fr) * 1995-07-18 1997-08-29 Renault Culasse de moteur a combustion interne munie d'un ecran thermique de pontet
US6443211B1 (en) * 1999-08-31 2002-09-03 Cummins Inc. Mettallurgical bonding of inserts having multi-layered coatings within metal castings
FR2831845B1 (fr) * 2001-11-07 2004-05-21 Peugeot Citroen Automobiles Sa Procede et dispositif de coulee d'une piece metallique comportant un element de renforcement
JP2005536641A (ja) * 2002-08-20 2005-12-02 スリーエム イノベイティブ プロパティズ カンパニー 金属マトリックス複合体およびその製造方法
EP1460151A1 (de) * 2003-03-19 2004-09-22 Ford Global Technologies, LLC, A subsidary of Ford Motor Company Zylinderkopf fuer Hubkolbenbrennkraftmaschinen
US20060024489A1 (en) * 2004-07-29 2006-02-02 3M Innovative Properties Company Metal matrix composites, and methods for making the same
US20060021729A1 (en) * 2004-07-29 2006-02-02 3M Innovative Properties Company Metal matrix composites, and methods for making the same
US20060024490A1 (en) * 2004-07-29 2006-02-02 3M Innovative Properties Company Metal matrix composites, and methods for making the same
AT502971B1 (de) * 2006-12-07 2008-05-15 Avl List Gmbh Zylinderkopf für eine brennkraftmaschine
WO2007137314A2 (de) 2006-05-26 2007-12-06 Avl List Gmbh Zylinderkopf für eine brennkraftmaschine
DE102012104820B4 (de) * 2012-06-04 2014-10-09 Actech Gmbh Verfahren zur Herstellung von Verbundgussteilen
CN114046209A (zh) * 2022-01-13 2022-02-15 爱柯迪股份有限公司 氮化硅纤维增强铝合金发动机缸套及制备方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948309A (en) * 1973-08-20 1976-04-06 Ford Motor Company Composite rotor housing with wear-resistant coating
DE3590587C2 (de) * 1984-11-07 1988-06-23 Mitsubishi Motors Corp Verfahren und Vorrichtung zur Herstellung eines Verbundkörpers
DE3511542A1 (de) * 1985-03-29 1986-10-02 Kolbenschmidt AG, 7107 Neckarsulm Verbundgussverfahren
DE3617456A1 (de) * 1986-05-23 1987-12-03 Vaw Ver Aluminium Werke Ag Verfahren und vorrichtung zur festen verbindung von keramischen formteilen mit metallen
IT1228449B (it) * 1989-02-22 1991-06-19 Temav Spa Procedimento per ottenere un legame metallurgico tra un materiale metallico o composito a matrice metallica e un getto di metallo o di lega metallica.
WO1989009669A1 (en) * 1988-04-15 1989-10-19 Sandvik Australia Pty. Limited Composite hard metal-metal components

Also Published As

Publication number Publication date
FR2663250B1 (enrdf_load_stackoverflow) 1994-12-30
FR2663250A1 (fr) 1991-12-20
DE69130038D1 (de) 1998-10-01
EP0462850A1 (fr) 1991-12-27
DE69130038T2 (de) 1999-05-12

Similar Documents

Publication Publication Date Title
EP0462850B1 (fr) Procédé de fabrication de pièces en alliage d'aluminium coulé comportant un insert et culasse de moteur à combustion interne obtenue par ce procédé
JP3287916B2 (ja) バルブシートの接合構造
US4830932A (en) Heat resistant light alloy articles and method of manufacturing same
US11420253B2 (en) Aluminum casting design with alloy set cores for improved intermetallic bond strength
FR2534902A1 (fr) Assemblage de metal et de ceramique
FR2513153A1 (fr) Piston pour moteur a combustion interne et son procede de fabrication
EP0500482A1 (fr) Revêtement de surface anti-grippage pour moyen d'assemblage de tubes par filetages et procédé de réalisation d'un tel revêtement
JP2008188609A (ja) ダイカスト金型およびその表面処理方法
US8895102B2 (en) Method of treating surface of mold
US5199481A (en) Method of producing reinforced composite materials
GB2173436A (en) Composite casting process
JPH04330353A (ja) ピストンの製造方法
FR2665383A1 (fr) Procede d'obtention par moulage de pieces bimateriaux.
CN107052306A (zh) 一种过共晶与亚共晶铝硅合金固‑液双金属复合铸造方法
JPH01111830A (ja) 繊維強化金属複合材料の製造方法
EP0898659B1 (en) Thin-walled bearings
JP2022552807A (ja) 金属コーティングされた光ファイバおよびその製造の方法
CZ415698A3 (cs) Způsob výroby tělesa kokily a těleso kokily
JPS60141362A (ja) 母材の強化層形成方法
DE102009023794A1 (de) Turboladergehäuse mit einer Konversionsbeschichtung und Verfahren zur Herstellung der Konversionsbeschichtung
EP1118457B1 (fr) Pièce bimétallique en alliage d'aluminium comportant un insert massif en titane ou alliage de titane
JP3283442B2 (ja) 異種金属の鋳ぐるみ構造
JPS60228663A (ja) 母材の強化層形成方法
FR2608476A1 (fr) Procede de fabrication de pieces metalliques coulees comportant un insert en matiere ceramique
WO1990000945A1 (en) Mold for continuously casting steel

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

17P Request for examination filed

Effective date: 19920215

17Q First examination report despatched

Effective date: 19960311

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE GB IT

REF Corresponds to:

Ref document number: 69130038

Country of ref document: DE

Date of ref document: 19981001

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19981130

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20060425

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20060505

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20060531

Year of fee payment: 16

REG Reference to a national code

Ref country code: GB

Ref legal event code: 746

Effective date: 20070112

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20070517

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070517

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070517