WO2003078676A1 - Procede et dispositif d'alfination de pieces - Google Patents

Procede et dispositif d'alfination de pieces Download PDF

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Publication number
WO2003078676A1
WO2003078676A1 PCT/CH2003/000174 CH0300174W WO03078676A1 WO 2003078676 A1 WO2003078676 A1 WO 2003078676A1 CH 0300174 W CH0300174 W CH 0300174W WO 03078676 A1 WO03078676 A1 WO 03078676A1
Authority
WO
WIPO (PCT)
Prior art keywords
components
alfin
alfinbad
bath
continuous furnace
Prior art date
Application number
PCT/CH2003/000174
Other languages
German (de)
English (en)
Inventor
Karl Merz
Original Assignee
Karl Merz
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 Karl Merz filed Critical Karl Merz
Priority to AU2003208246A priority Critical patent/AU2003208246A1/en
Priority to EP03706199A priority patent/EP1485514A1/fr
Publication of WO2003078676A1 publication Critical patent/WO2003078676A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/12—Aluminium or alloys based thereon
    • 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
    • B22D19/0027—Cylinders, pistons 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
    • B22D19/0081—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
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/003—Apparatus
    • C23C2/0032—Apparatus specially adapted for batch coating of substrate
    • C23C2/00322—Details of mechanisms for immersing or removing substrate from molten liquid bath, e.g. basket or lifting mechanism
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/50—Controlling or regulating the coating processes

Definitions

  • the present invention relates to a method and a device for alfinizing components in an alfin bath, the components being intended to be cast in a cast part made of aluminum.
  • the invention is concerned with the finishing of piston ring carriers with a cooling channel, which are intended to be cast in cast aluminum pistons for internal combustion engines.
  • the alfin layer created on the surface of the components by the alfining serves as a connecting layer for producing a firm, permanent and resilient connection between the components and the aluminum material in which they are cast.
  • a material can be used for the components which does not readily enter into such a connection with the aluminum material.
  • the piston ring carrier is e.g. Made of a gray cast material, while a stainless steel sheet is usually used for the cooling channel.
  • Oxide layers are a problem with alfining because the alfin material does not adhere to them. Defective spots in the alfin layer lead to a non-optimal embedding of the components during the subsequent pouring and in piston ring carriers because of the extremely high Requirements that are placed on the pistons of modern internal combustion engines are inevitably rejected. Any oxide layers that are present must therefore be removed from the components thoroughly before the alfining. In the case of the piston ring carriers, oxide layers are formed, for example, when the parts are previously annealed to reduce stress.
  • oxide layers are present, they are usually removed by particle blasting of the parts. Particle blasting also partially closes the pores in the surface of the components and individual particles of the particle beam used remain adhering to the surface of the components, neither of which is beneficial to the subsequent refining.
  • the object of the invention is to provide a method and a device with which the problems explained above can be avoided and components which have been flawlessly manufactured can be produced in a simple, rational manner.
  • this object is achieved according to the invention by a method according to claim 1.
  • oxygen present in the components is at least partially removed before the components are introduced into the alfin bath by heating the components in an inert gas atmosphere.
  • the air or oxygen leakage from the components which is disadvantageous in the state of the art in the Alfin bath, is thus anticipated according to the invention and brought forward into a phase in which it has no harmful effect.
  • the inert gas is used, which is otherwise e.g. when heated in air e.g. to prevent the components from oxidizing during annealing.
  • the amount of air or oxygen that escapes locally from the components when heated is so small and is also distributed so strongly and so rapidly in the large volume of inert gas that oxidations of any appreciable extent cannot occur as a result.
  • any gas can be used as the inert gas which does not cause any oxidation or any other change on the surface of the components which is disadvantageous for the alfining.
  • gases which additionally have a kind of reducing effect and, if appropriate, attack and remove existing disruptive surface layers.
  • a device comprises a continuous furnace which can be charged with an inert gas and has an integrated alfin bath.
  • Fig. 1 shows a schematic representation of an inventive device for
  • FIG. 2 shows a schematic representation of the device from FIG. 1 in supervision
  • Figure 3 shows a hanger for hanging the components on the conveyor with a component from the side.
  • Fig. 4 shows the same hanger with the component in view.
  • 10 denotes a continuous furnace which, in a manner not shown, can be charged with an inert gas to form an inert gas atmosphere in the interior of the furnace.
  • an alfin bath 20 is arranged in a central zone 12.
  • a circulating conveyor belt 30 is passed through the continuous furnace 10 and lowered in the area of the alfin bath 20, so that components 40 suspended on the conveyor belt 30 dip into the alfin bath 20 and are moved out of the alfin bath 20 after passing through it.
  • a zone 11 is present in the continuous furnace 10, in which the components 40 are heated in the inert gas atmosphere prevailing in the furnace without large surface oxidation of their surface.
  • This also results in a deliberate air leakage from air-filled cavities of the components through any openings in these cavities and, in the case of piston ring carriers with a cooling channel, in particular to air leakage from leaks in the air-filled cooling channel.
  • the air which usually only emerges in small quantities, is distributed in the inert gas volume so quickly that it, even locally, in the region of the Exit point, can not cause any significant oxidation, which can lead to defects in the Alfin layer in the Alfindbad 20 which is then passed through.
  • the components 40 are also annealed by the heating, so that a separate preliminary annealing can be omitted.
  • the temperature of the continuous furnace in the region of zone 11 is preferably set such that the components 40 reach at least the temperature of the Alfin bath, but preferably a temperature which is still 5 ° to 20 ° C higher, before they enter the Alfin bath 20.
  • This embodiment is particularly advantageous in the case of piston ring carriers with a cooling duct, because in these a complete tightness of the cooling duct itself no longer has to be achieved.
  • the leak tests that have been carried out so far can therefore be omitted and thus pre-sorting of non-leaky parts.
  • the requirements that were previously placed on the technologically very critical welded connection between the stainless steel sheet of the cooling channel and the material of the actual ring carrier can also be significantly reduced and / or welding techniques that are easier to control or economically feasible can be used.
  • Such a welding technique is e.g. resistance welding.
  • a further zone 13 in the continuous furnace 10 Downstream of the alfin bath 20 is a further zone 13 in the continuous furnace 10, in which the components 40 coming from the alfin bath for solidifying the fresh alfin layer are kept at a higher temperature for a certain time before they move the furnace again leave.
  • the temperature of the continuous furnace 10 in this zone 13 is preferably chosen to be somewhat lower than the temperature of the alfin bath 20 and preferably such that the components are cooled to a temperature which is 50 ° C.-70 ° C. lower than when leaving the continuous furnace the temperature of the alfin bath 20.
  • 50 is also a vibrator, which is also arranged in the continuous furnace 10 and shakes the components 40 when passing through the alfin bath 20.
  • a unit 60 is shown in Fig. 1 and Fig. 2 in the direction of flow in front of the continuous furnace 10, which is also traversed by the conveyor belt 30 with the components 40 and if it is a device e.g. can act on particle blasting of the components, provided that blasting the components 40 seems expedient.
  • an Alfin melting crucible 70 is provided outside the continuous furnace 10, which can be equipped with a low-pressure level control to keep the level in the Alfin bath 20 constant.
  • the removal of slag from the alfin bath can be solved in any known manner, as can the alfining process as such, including the composition of the alfin melt, can be carried out in a known manner.
  • the conveyor belt 30 is rotating and is loaded with the components 40 at a position designated 80, for example.
  • the refined components 40 are removed from the conveyor belt after passing through the continuous furnace 10 and preferably directly, i.e. still in the heated state, placed in casting molds 91 and subsequently immediately cast in them, which in turn has a favorable effect on the embedding of the components in the casting body.
  • FIG. 3 and 4 show, by way of example, a piston ring carrier 41 with a cooling channel 42 held by a wire hanger 31 which is pivotally suspended at its upper end on the conveyor belt 30 or a Velcro link 32 of a corresponding conveyor chain.
  • Designated at 33 on the hanger 31 is a dome, which engages in a corresponding notch on the piston ring carrier 41 and holds it in the hanger 31 in a certain orientation.
  • the transfer of the components 40 to the conveyor belt 30 in a certain orientation is particularly advantageous if the components are not rotationally symmetrical and if use is to be made of direct transfer of the components from the conveyor belt into casting molds, as described above.
  • piston ring carrier ⁇ With piston ring carrier ⁇ with This is the case in the cooling channel, for example, if nipples or warts are formed on the cooling channel in order to facilitate drilling of the cooling channel in the piston.
  • the method according to the invention can be carried out particularly economically.
  • the reject incurred so far is avoided or at least reduced.
  • Technically easier to control welding processes can be used.
  • Rationalizations compared to the prior art also result from the saving of procedural steps, such as a possible leak test of the components, a leak tightness being no longer required per se.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)

Abstract

La présente invention concerne un procédé d'alfination de pièces (40) dans un bain d'alfination (20), lesdites pièces étant destinées à être coulées dans une pièce de coulée en aluminium. Selon l'invention, avant introduction des pièces dans le bain d'alfination, l'oxygène présent dans les pièces est au moins partiellement éliminé par chauffage des pièces dans une atmosphère de gaz inerte. Cela permet d'éviter l'apparition de défauts, résultant de l'oxydation locale, affectant la couche d'alfination des pièces. Le procédé s'avère particulièrement économique lorsqu'il est mis en oeuvre dans le cadre du traitement par passage dans un four de traitement en continu alimenté en gaz inerte (10) qui contient également la bain d'alfination (20).
PCT/CH2003/000174 2002-03-18 2003-03-18 Procede et dispositif d'alfination de pieces WO2003078676A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2003208246A AU2003208246A1 (en) 2002-03-18 2003-03-18 Method and device for the alfin processing of components
EP03706199A EP1485514A1 (fr) 2002-03-18 2003-03-18 Procede et dispositif d'alfination de pieces

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4692002 2002-03-18
CH469/02 2002-03-18

Publications (1)

Publication Number Publication Date
WO2003078676A1 true WO2003078676A1 (fr) 2003-09-25

Family

ID=27810655

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH2003/000174 WO2003078676A1 (fr) 2002-03-18 2003-03-18 Procede et dispositif d'alfination de pieces

Country Status (3)

Country Link
EP (1) EP1485514A1 (fr)
AU (1) AU2003208246A1 (fr)
WO (1) WO2003078676A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009027477A1 (de) * 2009-07-06 2011-01-13 Federal-Mogul Nürnberg GmbH Vorrichtung und Verfahren zur Verbesserung der Alfinqualität
DE102008048109B4 (de) * 2008-04-17 2015-01-29 Ks Aluminium-Technologie Gmbh Verfahren zur Herstellung eines metallischen Bauteils und Verwendung eines Zylinderteils als Grundkörper zur Durchführung des Verfahrens

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2082622A (en) * 1933-02-25 1937-06-01 Colin G Fink Daluminum coated metal and process for producing the same
US2570746A (en) * 1948-09-08 1951-10-09 Brunner Verzinkerei Bruder Bab Galvanizing apparatus
GB676198A (en) * 1946-07-31 1952-07-23 Michel Alferieff Process for coating metallic objects with other metals
US3728144A (en) * 1970-04-24 1973-04-17 Bekaert Sa Nv Method for coating metal substrates with molten metal
GB1450039A (en) * 1972-08-15 1976-09-22 Dain R J Method of making a compoennt from metal powder
US4431688A (en) * 1981-03-10 1984-02-14 Kokoku Steel-Wire Ltd. Process and installation for the high-velocity dip-coating of filament like materials
US4584211A (en) * 1983-08-17 1986-04-22 Nippon Steel Corporation Continuous hot dip aluminum coating method
EP0427389A1 (fr) * 1989-11-06 1991-05-15 Dana Corporation Procédé de traitement d'un élément ferreux pour un assemblage métallurgique ultérieur avec de l'aluminiun coulé
JPH04289117A (ja) * 1991-03-16 1992-10-14 Toho Aen Kk 高純度鉄の脱酸・脱炭・脱硫・脱窒方法
US5447754A (en) * 1994-04-19 1995-09-05 Armco Inc. Aluminized steel alloys containing chromium and method for producing same
WO1997013597A2 (fr) * 1995-10-11 1997-04-17 Mahle Gmbh Procede de production d'une liaison intermetallique
US6328824B1 (en) * 1998-02-25 2001-12-11 Sollac Sheet with aluminum coating that is resistant to cracking
WO2002061153A1 (fr) * 2001-01-30 2002-08-08 Mahle Gmbh Procede de traitement prealable d'un porte-segment avant l'application du procede alfin

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2082622A (en) * 1933-02-25 1937-06-01 Colin G Fink Daluminum coated metal and process for producing the same
GB676198A (en) * 1946-07-31 1952-07-23 Michel Alferieff Process for coating metallic objects with other metals
US2570746A (en) * 1948-09-08 1951-10-09 Brunner Verzinkerei Bruder Bab Galvanizing apparatus
US3728144A (en) * 1970-04-24 1973-04-17 Bekaert Sa Nv Method for coating metal substrates with molten metal
GB1450039A (en) * 1972-08-15 1976-09-22 Dain R J Method of making a compoennt from metal powder
US4431688A (en) * 1981-03-10 1984-02-14 Kokoku Steel-Wire Ltd. Process and installation for the high-velocity dip-coating of filament like materials
US4584211A (en) * 1983-08-17 1986-04-22 Nippon Steel Corporation Continuous hot dip aluminum coating method
EP0427389A1 (fr) * 1989-11-06 1991-05-15 Dana Corporation Procédé de traitement d'un élément ferreux pour un assemblage métallurgique ultérieur avec de l'aluminiun coulé
JPH04289117A (ja) * 1991-03-16 1992-10-14 Toho Aen Kk 高純度鉄の脱酸・脱炭・脱硫・脱窒方法
US5447754A (en) * 1994-04-19 1995-09-05 Armco Inc. Aluminized steel alloys containing chromium and method for producing same
WO1997013597A2 (fr) * 1995-10-11 1997-04-17 Mahle Gmbh Procede de production d'une liaison intermetallique
US6328824B1 (en) * 1998-02-25 2001-12-11 Sollac Sheet with aluminum coating that is resistant to cracking
WO2002061153A1 (fr) * 2001-01-30 2002-08-08 Mahle Gmbh Procede de traitement prealable d'un porte-segment avant l'application du procede alfin

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 017, no. 100 (C - 1030) 26 February 1993 (1993-02-26) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008048109B4 (de) * 2008-04-17 2015-01-29 Ks Aluminium-Technologie Gmbh Verfahren zur Herstellung eines metallischen Bauteils und Verwendung eines Zylinderteils als Grundkörper zur Durchführung des Verfahrens
DE102009027477A1 (de) * 2009-07-06 2011-01-13 Federal-Mogul Nürnberg GmbH Vorrichtung und Verfahren zur Verbesserung der Alfinqualität

Also Published As

Publication number Publication date
AU2003208246A1 (en) 2003-09-29
EP1485514A1 (fr) 2004-12-15

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