SE444032B - MAKE MANUFACTURING PISTON FOR COMBUSTION ENGINE - Google Patents

MAKE MANUFACTURING PISTON FOR COMBUSTION ENGINE

Info

Publication number
SE444032B
SE444032B SE8402975A SE8402975A SE444032B SE 444032 B SE444032 B SE 444032B SE 8402975 A SE8402975 A SE 8402975A SE 8402975 A SE8402975 A SE 8402975A SE 444032 B SE444032 B SE 444032B
Authority
SE
Sweden
Prior art keywords
piston
surface body
combustion engine
tool
layer
Prior art date
Application number
SE8402975A
Other languages
Swedish (sv)
Other versions
SE8402975D0 (en
SE8402975L (en
Inventor
B Laurin
K Korhonen
H Lindgren
Original Assignee
Kanthal Ab
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 Kanthal Ab filed Critical Kanthal Ab
Priority to SE8402975A priority Critical patent/SE444032B/en
Publication of SE8402975D0 publication Critical patent/SE8402975D0/en
Priority to DE19853518058 priority patent/DE3518058A1/en
Publication of SE8402975L publication Critical patent/SE8402975L/en
Publication of SE444032B publication Critical patent/SE444032B/en

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
    • 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

Description

ïj. *s-wßwï-'sgfiçfigfivsæ- f-ß fr* , « 8402975-0 2 ning (ljusbågs-, flam- eller plasmasprutning), sintring eller varmisostatisk pressning, erhålles redan från början önskad konfiguration, och någon efterbearbetning behövs normalt ej, åtminstone inte för korrigering av kolvytans gemometri. 5 , Ytkroppens material består företrädesvis av ca 22% Cr, 6% Al, eventuellt små mängder av ett eller flera element E gruppen Si, Mn, Co, Y, Hf, eventuellt små mängder oxider och nitrider samt resten Fe. 10 Det av väsentligen ren Al bestående bindeskiktet kan lämp- ligen påföras genom termisk sprutning, varvid synnerligen god vidhäftning gentemot ytkroppen erhålles. Detta beror sanno- likt på att en reaktion sker mellan materialet i ytkroppen 15 och påsprutad aluminium tack vare den höga temperaturen vid påsprutningen. Denna temperatur överstiger väsentligt aluminius smältpunkt. ïj. * s-wßwï-'sg fi ç fi g fi vsæ- f-ß fr *, «8402975-0 2 (arc, flame or plasma spraying), sintering or thermostatic pressing, the desired configuration is obtained from the beginning, and no finishing is normally required, at least not for correcting the piston surface geometry. 5, The surface body material preferably consists of about 22% Cr, 6% Al, optionally small amounts of one or more elements E group Si, Mn, Co, Y, Hf, optionally small amounts of oxides and nitrides and the remainder Fe. The bonding layer consisting of substantially pure Al can be suitably applied by thermal spraying, whereby extremely good adhesion to the surface body is obtained. This is probably due to a reaction between the material in the surface body 15 and the sprayed-on aluminum due to the high temperature during the spraying. This temperature significantly exceeds the melting point of aluminum.

Kolvkroppen, som gjutes mot bindeskiktet, består företrädes- 20 vis av en aluminiumlegering innehållande ca 12% Si, t.ex. det under varumärket SILUMIN saluförda materialet.The piston body, which is cast against the bonding layer, preferably consists of an aluminum alloy containing about 12% Si, e.g. the material marketed under the SILUMIN brand.

Uppfinningen.förklaras närmare nedan med hänvisning till bi- fogade mikrofoto (förstoring 400 x), som visar ett snitt 25 genom en kolv enligt uppfinningen, i området för bindeskiktet mellan kolvkropp och ytskikt.The invention is explained in more detail below with reference to the attached photomicrograph (magnification 400x), which shows a section through a piston according to the invention, in the area of the bonding layer between the piston body and the surface layer.

Enligt uppfinningen tillverkas en förbränningsmotorkolv genom att man först framställer en relativt tunn kropp, som skall 30 bilda kolvens mot förbränningsrumet vända ytskikt. Härvid tan' användes ett verktyg, vars form mtsvarar utsidan av den fär- É diga kolvens topp samt en större eller mindre del av den an- §¿"§ slutande sidoytan. I verktyget sprutas ett skikt (0,5-3 mm ïgn tjockt) bestående av ca 22% Cr, 6% Al och resten huvudsak- ;“¶; 35 ligen Fe. Alternativt kan den tunna ytkroppen sintras eller š:¿§ varmisostatpressas. _, _ 10 15 20 25 _ n p: 840297S°0 På ytkroppen päföres ett ca 0,1 mm tjock bindeskikt av väsentligen ren Al, t.ex. genom termisk sprutning direkt mot den i verktyget kvarliggande ytkroppen.According to the invention, an internal combustion engine piston is manufactured by first producing a relatively thin body, which is to form the surface layer of the piston facing the combustion chamber. In this case, a tool was used, the shape of which corresponds to the outside of the top of the finished piston and a larger or smaller part of the adjoining side surface. ) consisting of about 22% Cr, 6% Al and the rest mainly Fe; Alternatively, the thin surface body can be sintered or š: ¿§ heat isostat pressed. _, _ 10 15 20 25 _ np: 840297S ° 0 On the surface body is applied with an approximately 0.1 mm thick bonding layer of substantially pure Al, eg by thermal spraying directly against the surface body remaining in the tool.

Därefter gjutes själva kolvkroppen av en aluminiumlegering (t.ex. av det ovan nämnda materialet SILUMIN) mot binde- skiktet.Then the piston body itself is cast of an aluminum alloy (eg of the above-mentioned material SILUMIN) against the binder layer.

Vid gjutningen av kolvkroppen kan ytkroppen (med tillhörande binaeskixr) lämpligen överföras sin en särskild gjurfsm, 1 synnerhet om ytkroppen framställts genom sintring eller varm- isostatpressning. Alternativt kan det verktyg- i vilket sprutning skett, utgöra en del av gjutformen, varvid de spru- tade skikten får sitta kvar tills gjutningen är klar.When casting the piston body, the surface body (with associated binoculars) can suitably be transferred to a special girder, especially if the surface body is produced by sintering or hot isostat pressing. Alternatively, the tool in which spraying has taken place may form part of the mold, whereby the sprayed layers may remain until the casting is complete.

Såsom framgår av mikrofotot uppnås en synnerligen god för- ankring mellan såväl ytskiktet 1 och bindeskiktet 2 som mellan det senare och det gjutna kolvkroppsmaterialet 3.As can be seen from the photomicrograph, an extremely good anchoring is achieved between the surface layer 1 and the bonding layer 2 as well as between the latter and the cast piston body material 3.

Mellan skikten 1 och 2 sker även en viss diffusion, som ut- terligare förbättrar bindningen. Genom lämplig reglering av päsprutningen av ytskiktet 1 kan detta ges en relativt porös (upp till 20% porvolym) struktur, vilket förbättrar vidhäft- ningen gentemot bindeskiktet 2.There is also a certain diffusion between layers 1 and 2, which further improves the bonding. By suitable control of the spraying of the surface layer 1, this can be given a relatively porous (up to 20% pore volume) structure, which improves the adhesion to the bonding layer 2.

Det verktyš, 1 vilket ytkroppen sprutas, kan förses med ett lämpligt släppmedel eller tillverkas av ett material, från vilket det sprutade skiktet lätt släpper. Det har överraskan- de visat sig, att vidhäftningen mellan FeCrAl-legerinden och aluminiumlegeringen (SILUMIN) är så låg, att denna aluminiu- legering med fördel kan användas som verktygsmaterial.The tool in which the surface body is sprayed can be provided with a suitable release agent or made of a material from which the sprayed layer easily releases. It has surprisingly been found that the adhesion between the FeCrAl alloy and the aluminum alloy (SILUMIN) is so low that this aluminum alloy can be used to advantage as a tool material.

Såsom nämnts :van är det en väsentlig fördel med uppfinningen att kolvytan redan från början får god ytfinhet och önskad geometrisk konfiguration. Endast i undantagsfall torde en efterbearbetning vara nödvändig och då endast för uppnående av förbättrad ytfinhet. Hed tanke på den normalt mycket kan- plicerade goometrin hos toppen pl en kolv är detta mycket be- tydelsefullt ur såväl teknisk som ekonomisk synpukt.As mentioned, it is an essential advantage of the invention that the piston surface has good surface finish and the desired geometric configuration from the outset. Only in exceptional cases should a finishing be necessary and then only to achieve improved surface finish. Given the normally very complicated geometry of the top of a piston, this is very significant from both a technical and economic point of view.

Claims (6)

8402975-0 PATENTKRAV8402975-0 PATENT CLAIMS 1. Sätt att tillverka en förbränningsmotorkolv med en kolv- kropp (3) bestående väsentligen av aluminium eller en aluminium- legering och ett på kolvkroppens mot förbränningsrummet vända ändparti beläget ytskikt (1) av ett metalliskt, värme- och korrosionsbeständigt material, k ä n n e t e c k n a t a v att man först framställer en av 10-30% Cr, 1-12% Al och resten huvudsakligen Fe bestående ytkropp (1) i ett verktY9» att man på ytkroppen (1) påför ett bipdeskikt (2) av väsentligen ren Al och att man därefter gjuter kolvkroppen (3) mot mellanskiktet.A method of manufacturing an internal combustion engine piston with a piston body (3) consisting essentially of aluminum or an aluminum alloy and a surface layer (1) located on the end of the piston body facing the combustion chamber of a metallic, heat- and corrosion-resistant material, characterized by that one first produces a surface body (1) consisting of 10-30% Cr, 1-12% Al and the rest mainly Fe in a tool, then the piston body (3) casts against the intermediate layer. 2. Sätt enligt krav 1, k ä n n e t e c k n a t a v att yt- kroppen (1) framställs genom termisk sprutning mot ett verktyg.2. A method according to claim 1, characterized in that the surface body (1) is produced by thermal spraying against a tool. 3. Sätt enligt krav 1 eller 2, k ä n n e t e c k n a t a v att verktyget består av en aluminiumlegering innehållande ca 12% Si.3. A method according to claim 1 or 2, characterized in that the tool consists of an aluminum alloy containing about 12% Si. 4. Sätt enligt krav 1, k ä n n e t e c k n a t a v att ytkroppen (1) framställes genom sintring.4. A method according to claim 1, characterized in that the surface body (1) is produced by sintering. 5. Sätt enligt krav 1, k ä n n e t e c k n a t a v att ytkroppen (1) framställes genom varmisostatpressning.5. A method according to claim 1, characterized in that the surface body (1) is produced by hot isostat pressing. 6. Sätt enligt något av kraven 1 - 4, k ä n n e t e c k n a t a v att bindeskiktet (2) påföres på ytkroppens (1) insida genom termisk sprutning.6. A method according to any one of claims 1 - 4, characterized in that the bonding layer (2) is applied to the inside of the surface body (1) by thermal spraying.
SE8402975A 1984-06-01 1984-06-01 MAKE MANUFACTURING PISTON FOR COMBUSTION ENGINE SE444032B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE8402975A SE444032B (en) 1984-06-01 1984-06-01 MAKE MANUFACTURING PISTON FOR COMBUSTION ENGINE
DE19853518058 DE3518058A1 (en) 1984-06-01 1985-05-20 Piston for internal combustion engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8402975A SE444032B (en) 1984-06-01 1984-06-01 MAKE MANUFACTURING PISTON FOR COMBUSTION ENGINE

Publications (3)

Publication Number Publication Date
SE8402975D0 SE8402975D0 (en) 1984-06-01
SE8402975L SE8402975L (en) 1985-12-02
SE444032B true SE444032B (en) 1986-03-17

Family

ID=20356113

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8402975A SE444032B (en) 1984-06-01 1984-06-01 MAKE MANUFACTURING PISTON FOR COMBUSTION ENGINE

Country Status (2)

Country Link
DE (1) DE3518058A1 (en)
SE (1) SE444032B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3633134A1 (en) * 1986-09-30 1988-04-07 Man B & W Diesel Gmbh Built piston for internal combustion engines
US4993382A (en) * 1989-02-22 1991-02-19 Kabushiki Kaisha Riken Insert for an indirect injection diesel engine
DE4325864A1 (en) * 1993-08-02 1995-05-11 Mahle Gmbh Casting process for producing a component, in particular a piston, consisting of two different materials
DE4328619C2 (en) * 1993-08-26 1995-08-10 Peak Werkstoff Gmbh Partially reinforced cast aluminum component and process for its production
DE102006007148A1 (en) * 2006-02-16 2007-08-30 Volkswagen Ag Piston for internal combustion engines and method for producing a piston for internal combustion engines

Also Published As

Publication number Publication date
SE8402975D0 (en) 1984-06-01
SE8402975L (en) 1985-12-02
DE3518058A1 (en) 1985-12-05

Similar Documents

Publication Publication Date Title
EP1319730B1 (en) High temperature corrosion resistant alloy, thermal barrier coating material with metal bonding layer, and gas turbine using high temperature corrosion resistant alloy
JP4512002B2 (en) Cylinder liner
RU2317207C2 (en) Method of manufacture of the composite wall
EP0465237B1 (en) Honeycomb heaters and methods of manufacturing them
FI77899C (en) Process for producing heat and corrosion resistant materials al.
KR100244786B1 (en) Exhaust valve for diesel combustion engine and manufacturing method thereof
RU2344192C2 (en) Iron-chromium-aluminium alloy
US4884400A (en) Exhaust manifold of internal combustion engine
JPH0477129B2 (en)
US4026746A (en) Method of manufacturing an open-celled ceramic article
JP2003524075A (en) Composite insulation layer system
SE450903B (en) METALLIC INSULATION COMPONENT AND METHOD OF FORMING IT
JP4975131B2 (en) Cylinder liner manufacturing method
SE444032B (en) MAKE MANUFACTURING PISTON FOR COMBUSTION ENGINE
AU661839B2 (en) Heat resistant metallic carrier for automobile catalyst
SE453968B (en) CASTED METAL BODY AND SET TO MAKE IT SAME
US20160123583A1 (en) Recuperator burner
EP0362711A3 (en) Joined body of ceramic member and metallic member
EP0191008B1 (en) Shell or tubular object and method to manufacture the same
CN109642519A (en) Segmentation thermal barriers and its manufacturing method for internal combustion engine
ES2228539T3 (en) PORTABLE CATALYST BODY FOR APPLICATIONS OF TWO-WHEELED VEHICLES.
KR980000706A (en) Method of forming product extension by melting ceramic mold
KR100723126B1 (en) Method for manufacturing molds and dies by thermal spraying
JPS61178514A (en) Ceramic precombustion chamber diesel engine
SE528209C2 (en) Gas injection lance for burning fossil fuels, has composite design comprising metal core and outer layer of ceramic

Legal Events

Date Code Title Description
NUG Patent has lapsed

Ref document number: 8402975-0

Effective date: 19900620

Format of ref document f/p: F