EP0112848B1 - Chemises de moteurs a base d'alliages d'aluminium et de grains de silicium calibres et leurs procedes d'obtention - Google Patents

Chemises de moteurs a base d'alliages d'aluminium et de grains de silicium calibres et leurs procedes d'obtention Download PDF

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Publication number
EP0112848B1
EP0112848B1 EP83901824A EP83901824A EP0112848B1 EP 0112848 B1 EP0112848 B1 EP 0112848B1 EP 83901824 A EP83901824 A EP 83901824A EP 83901824 A EP83901824 A EP 83901824A EP 0112848 B1 EP0112848 B1 EP 0112848B1
Authority
EP
European Patent Office
Prior art keywords
grains
liner
silicon
weight
intermetallic compound
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
Application number
EP83901824A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0112848A1 (fr
Inventor
Noel Huret
Jean Meunier
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.)
Cegedur Societe de Transformation de lAluminium Pechiney SA
Original Assignee
Cegedur Societe de Transformation de lAluminium Pechiney 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
Priority claimed from FR8211032A external-priority patent/FR2528910B1/fr
Application filed by Cegedur Societe de Transformation de lAluminium Pechiney SA filed Critical Cegedur Societe de Transformation de lAluminium Pechiney SA
Publication of EP0112848A1 publication Critical patent/EP0112848A1/fr
Application granted granted Critical
Publication of EP0112848B1 publication Critical patent/EP0112848B1/fr
Expired legal-status Critical Current

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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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/18—Other cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/12—Metallic powder containing non-metallic particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/0408—Light metal alloys
    • C22C1/0416—Aluminium-based alloys
    • 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
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0085—Materials for constructing engines or their parts
    • F02F2007/009—Hypereutectic aluminum, e.g. aluminum alloys with high SI content
    • 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

Definitions

  • the present invention relates to jackets for internal combustion or internal combustion engines, the structure of which has grains of silicon calibrated and dispersed in a matrix of an eutectic aluminum-silicon alloy. It also relates to some of the processes for obtaining these shirts.
  • Engine liners made from aluminum are not new, but their use has always posed problems of compatibility of their working surface with engine elements such as the pistons which are in contact with them. Attempts have been made to overcome the difficulties encountered in various ways such as providing a steel jacket, coating the surface of the cylinder bore with harder metals such as iron or chromium, without however being able to overcome them completely.
  • the present invention therefore relates to an internal combustion engine liner based on an aluminum-eutectic silicon alloy possibly containing other elements and characterized in that its structure has a distribution of calibrated silicon grains of dimensions between 20 and 50 wm.
  • this jacket is that formed by an aluminum-silicon eutectic alloy matrix, that is to say containing about 12% of silicon and in which no primary silicon grain appears.
  • This alloy may optionally contain other addition elements which contribute to improving its mechanical characteristics or certain properties in relation to the friction or wear behavior.
  • silicon grains have a purity greater than 99.5% and preferably a calcium content of less than 300 ppm. They can optionally be treated to remove iron. Their facies are different depending on the method of production. Thus, one can have not only conventional grains prepared by grinding and sieving, but also grains produced by spraying liquid silicon which have a more rounded outline.
  • aluminum-silicon alloy matrix use is preferably made of eutectic alloys of the AS type, 2 U 4 G, that is to say containing elements such as copper and magnesium having the effect of improving the mechanical strength.
  • the friction properties of the shirts are favored by the presence of additives such as graphite or any other body playing an equivalent role.
  • additives such as graphite or any other body playing an equivalent role.
  • an artificial graphite of the granular type is used, a shape which integrates well physically with the other components of the jacket.
  • the most suitable proportion is between 3 and 10% by weight of the mass within which it is dispersed.
  • the Applicant has also found that the performance of the sleeve-piston assemblies can be further improved from the compatibility point of view and in particular remedy the appearance of certain point bonding phenomena which appear when the sleeve works above the limit temperatures generally. allowed, by adding to the jacket a dispersion of at least one intermetallic compound, distinct from that of such compounds likely to exist within the alloy and whose melting point is greater than 700 ° C.
  • the invention also consists in having in the jacket in addition to the calibrated silicon grains, a dispersion of at least one intermetallic compound.
  • this dispersion is different from the structure and / or composition point of view from that which might be present in the base alloy. Indeed, it is possible that this alloy contains certain elements capable of forming between them intermetallic compounds during its preparation by powder metallurgy. However, these compounds belong to the very structure of the base alloy and therefore have nothing to do with that (or those) concerned with the invention. These intermetallic compounds constituting this dispersion are chosen from those which have a melting temperature above 700 ° C.
  • the intermetallic compound Ni 3 Sn in which three nickel atoms are combined with a tin atom to form these crystals of the hexagonal type, has proved to be particularly effective both in its functions of "non-bonding agent and in those of lubricant and wear-resistant product.
  • Such compounds must be distributed regularly in the mass of the jacket in the form of grains.
  • these grains are preferably calibrated, that is to say that they respond to a particle size curve as narrow as possible and whose dimensions are in any case between 5 and 50 ⁇ . Lm. This excludes, on the one hand, grains that are too fine and which, because of their high specific surface, lead to seizure of the tools for manufacturing shirts, on the other hand, grains that are too coarse, which cause the friction coefficient to increase.
  • the grains of intermetallic compound may have a different facies depending on how they are obtained. Thus it is possible to have not only grains prepared by grinding but also grains produced by spraying the compound in the liquid state which therefore have a more rounded outline.
  • the base alloy constituting the matrix of the material of the invention in addition to the alloy of the type AS, Z U 4 G, one can also use an alloy of the type AS 12 Z 5 GU.
  • the invention also relates to some of the methods of obtaining such shirts. These methods have a common phase of dividing the aluminum-silicon eutectic alloy from the liquid state into a powder. This is obtained by all existing processes such as, for example, centrifugal spraying, atomization, etc. This powder is then sieved to remove particles of dimensions not between 60 and 400 ⁇ and then mixed with silicon grains of particle size between 20 and 50 ⁇ and in quantity such that they represent 5 to 15% by weight of the mass of the shirt; 3 to 10% by weight of graphite or any other element capable of improving the quality of the jacket, such as silicon carbide to increase its hardness or tin to make it more suitable for friction, are optionally added thereto.
  • an intermetallic compound is incorporated in the form of grains according to the percentages by weight of between 5 and 15% and of dimensions between 5 and 50 ⁇ . After suitable homogenization, such a mixture can then be treated in two different ways, either by sintering or by spinning.
  • the powder mixture is shaped by cold compression in a vertical or isostatic press, then sintered under a controlled atmosphere.
  • the shirt thus obtained is then machined to suitable dimensions.
  • the mixture is compressed cold in the form of a billet or loaded directly into the pot of a press, then spun in the form of a tube after possible preheating away from the atmosphere.
  • the spinning equipment used is well known to those skilled in the art. It can be either a bridge tool or a floating needle-plate assembly.
  • the tube thus obtained at the outlet of the press is erected, cut to the length of the jackets and the latter are then machined.
  • the mixture can also be compressed in the form of pions which are subjected to a reverse spinning so as to form buckets, the bottom and the opposite edge of which are then cut off to collect liners which are then machined. It is also possible to carry out a direct hardening of the buckets after spinning.
  • the invention can be illustrated by means of three figures appended to the present application and which represent drawings of micrographs drawn under a magnification of 200, of engine liners manufactured according to different techniques.
  • Figure 1 corresponds to a jacket obtained by casting a hypereutectic aluminum-silicon alloy
  • Figure 2 to a jacket obtained by spinning hypereutectic aluminum-silicon powder
  • Figure 3 to a jacket according to l invention obtained by spinning a mixture of eutectic aluminum-silicon alloy powder and calibrated silicon powder.
  • the aluminum-silicon alloy is an A-S17U4G according to the standards of the Aluminum Association which therefore contains 17% of silicon and therefore is said to be hypereutectic in silicon.
  • the aluminum-silicon alloy is also an A-S17U4G but resulting from the spinning of powder obtained by atomization. Due to the high cooling speed used to form this powder, the primary silicon grains (3) have a relatively small size comparable to that of eutectic silicon, and in any case less than that resulting from conventional casting. Also shown in this figure are graphite particles (4) which lengthen in the spinning direction and represent approximately 3% by weight of the jacket mass.
  • the aluminum-silicon alloy is an A-S12U4G which contains 12% of silicon and therefore is said to be eutectic in silicon. It also results from the spinning of powder obtained by atomization, but was added according to the invention before spinning, about 5% by weight of silicon powder whose grains (5) have a facies of particles resulting from grinding and a dimension between 20 and 50 wm. These grains are dispersed in an eutectic matrix within which there are silicon particles (7) which have coalesced and graphite particles (6) associated at a rate of 3% by weight. Note the completely original texture of the shirts according to the invention, a texture which contributes to significantly improving the compatibility with the pistons of the shirts thus produced.
  • the shirts forming the subject of the invention find their application in particular in the automobile industry and in any kind of industry where it is sought to have assemblies, piston-sleeve of good compatibility from alloys of 'aluminum.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
EP83901824A 1982-06-17 1983-06-15 Chemises de moteurs a base d'alliages d'aluminium et de grains de silicium calibres et leurs procedes d'obtention Expired EP0112848B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8211032 1982-06-17
FR8211032A FR2528910B1 (fr) 1982-06-17 1982-06-17 Chemises de moteurs a base d'alliages d'aluminium et de grains de silicium calibres et leurs procedes d'obtention
FR8220982 1982-09-12
FR8220982A FR2537654B2 (fr) 1982-06-17 1982-12-09 Perfectionnement des chemises de moteurs a base d'alliages d'aluminium et de grains de silicium calibres et leurs procedes d'obtention

Publications (2)

Publication Number Publication Date
EP0112848A1 EP0112848A1 (fr) 1984-07-11
EP0112848B1 true EP0112848B1 (fr) 1986-05-28

Family

ID=26222967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83901824A Expired EP0112848B1 (fr) 1982-06-17 1983-06-15 Chemises de moteurs a base d'alliages d'aluminium et de grains de silicium calibres et leurs procedes d'obtention

Country Status (9)

Country Link
US (1) US4650644A (it)
EP (1) EP0112848B1 (it)
JP (1) JPS59500779A (it)
CA (1) CA1237919A (it)
DE (1) DE3363726D1 (it)
ES (1) ES523319A0 (it)
FR (1) FR2537654B2 (it)
IT (1) IT1194273B (it)
WO (1) WO1984000050A1 (it)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4133546A1 (de) * 1991-10-10 1993-04-15 Mahle Gmbh Kolben-zylinderanordnung eines verbrennungsmotors
EP0893182A1 (de) * 1997-07-22 1999-01-27 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Herstellverfahren für eine Zylinderbüchse einer Brennkraftmaschine
US6030577A (en) * 1995-09-01 2000-02-29 Erbsloh Aktiengesellschaft Process for manufacturing thin pipes

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2608478B1 (fr) * 1986-12-22 1989-06-02 Delachaux Sa Procede de realisation de boulets chrome-aluminium pour l'ajout de chrome dans des bains d'aluminium en fusion
JPH0586964A (ja) * 1991-09-26 1993-04-06 Teikoku Piston Ring Co Ltd シリンダの冷却構造
US5749331A (en) * 1992-03-23 1998-05-12 Tecsyn, Inc. Powdered metal cylinder liners
DE4244502C1 (de) * 1992-12-30 1994-03-17 Bruehl Aluminiumtechnik Zylinderkurbelgehäuse und Verfahren zu seiner Herstellung
US5630355A (en) * 1993-06-21 1997-05-20 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Reciprocating type compressor with improved cylinder block
JP2740112B2 (ja) * 1993-06-21 1998-04-15 株式会社豊田自動織機製作所 斜板式圧縮機
DE19532252C2 (de) * 1995-09-01 1999-12-02 Erbsloeh Ag Verfahren zur Herstellung von Laufbuchsen
US5815789A (en) * 1996-07-08 1998-09-29 Ford Global Technologies, Inc. Method for producing self lubricating powder metal cylinder bore liners
US5842109A (en) * 1996-07-11 1998-11-24 Ford Global Technologies, Inc. Method for producing powder metal cylinder bore liners
DE19915038A1 (de) 1999-04-01 2000-10-26 Vaw Ver Aluminium Werke Ag Leichtmetallzylinderblock, Verfahren zu seiner Herstellung und Vorrichtung zur Durchführung des Verfahrens
DE10135485A1 (de) * 2001-07-20 2003-02-06 Schwaebische Huettenwerke Gmbh Verfahren zur endkonturnahen Fertigung von Bauteilen bzw. Halbzeugen aus schwer zerspanbaren Leichtmetalllegierungen, und Bauteil bzw. Halbzeug, hergestellt durch das Verfahren
DE10153720C2 (de) * 2001-10-31 2003-08-21 Daimler Chrysler Ag Zylinderkurbelgehäuse mit einer Zylinderlaufbuchse und Gießwerkzeug
US8071016B2 (en) * 2006-09-22 2011-12-06 Gkn Sinter Metals Llc Thin walled powder metal component manufacturing

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GB530996A (en) * 1939-07-07 1940-12-27 William David Jones Improvements in or relating to the manufacture of metal articles or masses
CH337661A (de) * 1954-04-21 1959-04-15 Metallgesellschaft Ag Verfahren zur Herstellung von gesinterten Werkstoffen
GB768204A (en) * 1955-03-29 1957-02-13 Metallgesellschaft Ag Method of producing sliding machine parts of aluminiumí¬silicon alloys
US2978798A (en) * 1955-08-31 1961-04-11 Metallgesellschaft Ag Aluminum and silicon containing metal powder and method of producing workpieces therefrom
GB805100A (en) * 1956-08-14 1958-11-26 Gen Motors Corp Improvements relating to sintered metal and articles made therefrom
DE1160194B (de) * 1957-07-18 1963-12-27 Metallgesellschaft Ag Verwendung von Aluminium-Sinter-Werkstoffen fuer auf Gleitung beanspruchte Maschinenteile
FR1354356A (fr) * 1963-02-28 1964-03-06 L Esercizio Dell Istituto Sper Procédé de fabrication de pastilles frittées en aluminium ou alliages d'aluminium destinées au filage inverse de récipients, pastilles obtenues par ce procédé et récipients fabriqués à partir de celles-ci
FR1448528A (fr) * 1965-09-29 1966-01-28 Dow Chemical Co Procédé d'extrusion d'alliages d'aluminium à résistance mécanique élevée et produits obtenus par ce procédé
DE2252607C3 (de) * 1972-10-26 1981-08-27 Yanmar Diesel Engine Co., Ltd., Osaka Zylinder für Brennkraftmaschine
US4068645A (en) * 1973-04-16 1978-01-17 Comalco Aluminium (Bell Bay) Limited Aluminum-silicon alloys, cylinder blocks and bores, and method of making same
JPS52101611A (en) * 1976-02-23 1977-08-25 Tsugio Nakatani Sintered ultrahighhsilicon aluminium product
FR2343895A1 (fr) * 1976-03-10 1977-10-07 Pechiney Aluminium Procede de fabrication de corps creux en alliages d'aluminium au silicium par filage de grenailles
JPS53118209A (en) * 1977-03-25 1978-10-16 Res Dev Corp Of Japan Powder metallurgical method of manufacturing high-silicon containing sinteted aluminum alloy
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4133546A1 (de) * 1991-10-10 1993-04-15 Mahle Gmbh Kolben-zylinderanordnung eines verbrennungsmotors
US5257603A (en) * 1991-10-10 1993-11-02 Mahle Gmbh Coated piston and process for applying coating
DE4133546C2 (de) * 1991-10-10 2000-12-07 Mahle Gmbh Kolben-Zylinderanordnung eines Verbrennungsmotors
US6030577A (en) * 1995-09-01 2000-02-29 Erbsloh Aktiengesellschaft Process for manufacturing thin pipes
EP0893182A1 (de) * 1997-07-22 1999-01-27 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Herstellverfahren für eine Zylinderbüchse einer Brennkraftmaschine

Also Published As

Publication number Publication date
EP0112848A1 (fr) 1984-07-11
IT1194273B (it) 1988-09-14
FR2537654B2 (fr) 1987-01-30
ES8403567A1 (es) 1984-03-16
CA1237919A (fr) 1988-06-14
JPS59500779A (ja) 1984-05-04
IT8321630A0 (it) 1983-06-15
US4650644A (en) 1987-03-17
WO1984000050A1 (fr) 1984-01-05
FR2537654A2 (fr) 1984-06-15
DE3363726D1 (en) 1986-07-03
JPH0137464B2 (it) 1989-08-07
ES523319A0 (es) 1984-03-16

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