EP0236247A1 - Metallische Werkstücke, wobei mindestens eine Fläche mindestens einen verschleissfesten Bereich enthält - Google Patents

Metallische Werkstücke, wobei mindestens eine Fläche mindestens einen verschleissfesten Bereich enthält Download PDF

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Publication number
EP0236247A1
EP0236247A1 EP87420054A EP87420054A EP0236247A1 EP 0236247 A1 EP0236247 A1 EP 0236247A1 EP 87420054 A EP87420054 A EP 87420054A EP 87420054 A EP87420054 A EP 87420054A EP 0236247 A1 EP0236247 A1 EP 0236247A1
Authority
EP
European Patent Office
Prior art keywords
zones
metal parts
parts according
width
depth
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.)
Withdrawn
Application number
EP87420054A
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English (en)
French (fr)
Inventor
Gérard Laslaz
Serge Terroni
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
Application filed by Cegedur Societe de Transformation de lAluminium Pechiney SA filed Critical Cegedur Societe de Transformation de lAluminium Pechiney SA
Publication of EP0236247A1 publication Critical patent/EP0236247A1/de
Withdrawn legal-status Critical Current

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    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F3/00—Changing the physical structure of non-ferrous metals or alloys by special physical methods, e.g. treatment with neutrons

Definitions

  • metal parts subjected to friction must have technological characteristics such as, in particular, resistance to wear and resistance to seizing at least on their "active" face, that is to say ie that which is in contact with the opposing part. Most often, these characteristics are only necessary in regions representing only a portion of said face, and in well localized areas of said regions.
  • French patent 2,371,520 describes a process for treating a given exposed region of an aluminum article or one of its alloys in the presence or not of an alloying agent, with a laser beam or an electron beam of high energy (at least 10,000 watts / cm 2 ) and of diameter between 250 and 1250 ⁇ m, so as to be able to heat the article in a first zone and to melt it in a second zone inside said first zone: a fine-grained structure is thus created at least in said zone, with the aim, inter alia, of improving the resistance to wear and eliminating or reducing the deformations resulting of treatment.
  • Claim 24 of this patent states that "said beam is moved along several separate and spaced paths so as to affect areas forming spaced regions on the exposed surface of said article".
  • French patent 2,367,117 claims “a process for treating a metallic surface with a bearing surface of a component, characterized in that it consists in heat treating only bearing zones for modify their metallurgical properties and improve their resistance to wear ".
  • the treatment is applied to a casing of cast iron hardened by cementation and consists in directing on the latter a laser emitting a beam such that it forms a point with a diameter of 3000 ⁇ m.
  • Japanese patent application published under No. 59,212,572 also teaches a method for curing the inner surface of an internal combustion engine cylinder by means of a laser in which the area ratio of the untreated areas to treated areas is preferably between 10 and 70% and the dimension of the treated areas is several mm.
  • zones suitable for friction can be obtained on parts by thermally treating their surface so as to locally obtain zones with a width exceeding 250 ⁇ m.
  • metal parts of which at least one face has at least one wear-resistant region on the surface consisting of a controlled distribution of zones hardened by localized melting effect are characterized in that said zones, whatever their length and shape, have a width and a depth between 3 and 150 ⁇ m and that the surface fraction of the zones for each mm2 of a region is between 5 and 60%.
  • the differences in dimensions between the zones and the inter-zone spaces do not exceed 10 ⁇ m, which therefore avoids any re-machining of the parts before use.
  • the treatment changes little the geometric profile of the treated part and only involves a slight change in the roughness.
  • the presence of spaces between the zones appreciably improves the ability of the parts to friction by creating on the surface and on a fine scale an alternation of hardened zones and soft spaces, a very effective arrangement generally in resistance to wear. by adhesion, fatigue or abrasion and also effective in friction since the soft inter-zone spaces constitute traps for lubricant, or even traps for wear debris.
  • the invention in fact involves in principle the statistical idea of reducing the width and depth of the zones and of separating them, the distribution on the scale of mm 2 and the shape of the zones having a second order effect with respect to with the width-depth effect and surface fraction.
  • the invention also includes the zones regularly arranged on the surface of the parts in the form of periodic or quasi-periodic arrays of bands, the width and the depth of which are obviously between 3 and 150 pm.
  • the zones can be arranged in the form of continuous bands separated from each other by a distance of between 20 and 1000 ⁇ m, these bands having either any direction or representing at least one network of parallel bands.
  • these zones can also be arranged in the form of discontinuous bands separated along their length and from each other by a distance of between 20 and 1000 ⁇ m; these bands having, as before, either any direction or representing at least one network of bands parallel.
  • the invention applies in particular to any alloy, in particular of aluminum, whose tribological properties are capable of being improved by a surface fusion treatment. It also applies to all parts where the zones consist of a base metal alloy melted with a filler element or a filler compound such that said alloy has better tribological properties than the base metal.
  • This element can be, for example, iron or nickel, in particular, when the base metal is an aluminum alloy.
  • zones corresponding to the characteristics of the invention can be obtained by any process making it possible to locally modify the nature or the structure of the surface of the part over a shallow depth and over a narrow width so as to give it by thermal effect and / or chemical better ability to friction.
  • Obtaining axial, circular or helical bands or any other shape can be easily achieved by controlling the relative movement of the part and the beam by means of a microprocessor.
  • FIGS. 1, 2 and 3 show, with regard to FIGS. 1, 2 and 3, different arrangements of zones produced according to the invention on a region of an active face of a part while FIG. 4 relates to a micrograph of a region portion of a part according to the invention and FIGS. 5, 6 and 7 to micrographic sections of parts according to the prior art (FIGS. 5 and 7) and according to the invention (fig. 6).
  • Parts in A-S5U3 that is to say containing by weight 5% of silicon, 3% of copper and the balance in aluminum and impurities
  • A-S17U4G (17% Si, 4% Cu, ⁇ 1 % Mg) produced in the same way were divided into two batches numbered 1 and 2, both comprising the two types of alloy.
  • Lot 1 was subjected to a laser treatment to obtain areas according to the prior art and lot 2 to another laser treatment to obtain areas according to the invention.
  • the parts according to the invention and which therefore have zones of small width and shallow depth have a rate of deformation of the surface profile such that it is no longer necessary to machine them.
  • the surface of the parts of lot 1 was treated according to overlapping unidirectional parallel bands (lot lA) or not (lot 1B: distance between bands 2000 pm) while that of lot 2 was treated according to a network of bands parallels crossing at right angles and spaced from each other by 200 ⁇ m.
  • the iron was replaced by a galvanic deposition of nickel so as to produce an alloy on the surface after fusion.
  • 10 x nickel and the parts of the 2 lots were subjected to friction-wear measurements using the CAMERON-PLINT tribometer.
  • This tribometer consists of a segment in chromed cast iron which presses on the surface to be checked and which is driven in an alternating movement so as to approximate approximately the friction which occurs between the segments inserted in the piston and the jacket of an engine. internal combustion.
  • the support load was 100 N, the room temperature 100 ° C, the frequency of movement 12 Hz and the test time 30 min.
  • the surface was previously lubricated with an oil of the Neutral 150 type.
  • the present invention finds its application in the manufacture of parts intended to be subjected to friction such as for example mechanical parts (engine liners and pistons, valve seats, brake drums and discs, toothed transmission pulleys, dies, gears , bearings, bearing surfaces of drive shafts, ball bearings, etc ...) and electrical contact parts where friction and passage of electric current are combined (connectors, sliding contact, electric motor collector, etc ... ).
  • mechanical parts engine liners and pistons, valve seats, brake drums and discs, toothed transmission pulleys, dies, gears , bearings, bearing surfaces of drive shafts, ball bearings, etc
  • electrical contact parts where friction and passage of electric current are combined (connectors, sliding contact, electric motor collector, etc ... ).
EP87420054A 1986-02-25 1987-02-23 Metallische Werkstücke, wobei mindestens eine Fläche mindestens einen verschleissfesten Bereich enthält Withdrawn EP0236247A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8603303 1986-02-25
FR8603303A FR2594851A1 (fr) 1986-02-25 1986-02-25 Pieces metalliques dont une face au moins presente au moins une region de zones resistant a l'usure

Publications (1)

Publication Number Publication Date
EP0236247A1 true EP0236247A1 (de) 1987-09-09

Family

ID=9332913

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87420054A Withdrawn EP0236247A1 (de) 1986-02-25 1987-02-23 Metallische Werkstücke, wobei mindestens eine Fläche mindestens einen verschleissfesten Bereich enthält

Country Status (3)

Country Link
EP (1) EP0236247A1 (de)
JP (1) JPS62253713A (de)
FR (1) FR2594851A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3202944A4 (de) * 2014-10-02 2018-03-28 Nippon Steel & Sumitomo Metal Corporation Herdrolle und herstellungsverfahren dafür

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0681030A (ja) * 1991-11-15 1994-03-22 Tone Corp 耐焼付き性に優れた摺動部材およびその製造方法
JP2755931B2 (ja) * 1995-11-29 1998-05-25 科学技術庁航空宇宙技術研究所長 耐熱構造物

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2009305A1 (de) * 1970-02-27 1971-09-23 Siepmann-Werke Kg, 4785 Belecke Reifen- oder Gleitschutznetz für Fahrzeugreifen sowie Verfahren zu seiner Herstellung
DE2419383B1 (de) * 1974-04-23 1975-07-10 Fried. Krupp Huettenwerke Ag, 4630 Bochum Verfahren zum Herstellen von Tiefziehteilen
FR2331416A1 (fr) * 1975-11-17 1977-06-10 Caterpillar Tractor Co Micro-asperites produites par un faisceau d'energie corpusculaire
FR2341665A1 (fr) * 1976-02-17 1977-09-16 United Technologies Corp Articles metalliques a microstructure composite
FR2385810A1 (fr) * 1977-03-28 1978-10-27 Avco Everett Res Lab Inc Procede de formation d'une couche superficielle d'alliage par fusion au laser d'un metal d'apport sur un substrat metallique
GB2026649A (en) * 1978-08-11 1980-02-06 Steigerwald Stahltechink Gmbh Piston having at least one piston ring groove
DE2940127A1 (de) * 1978-10-05 1980-04-17 Coherent Inc Verfahren und vorrichtung zur waermebehandlung
FR2476524A1 (fr) * 1980-02-27 1981-08-28 Sumitomo Metal Ind Procede pour travailler la surface d'un cylindre de laminage a froid
EP0119182A1 (de) * 1983-03-11 1984-09-19 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Verfahren zur Verbesserung der Oberflächeneigenschaften von Walzen
EP0144817A2 (de) * 1983-12-03 1985-06-19 MAN B & W Diesel Aktiengesellschaft Verfahren zur Herstellung verschleissfester Zylinderlaufflächen von Brennkraftmaschinen
FR2570718A1 (fr) * 1984-09-21 1986-03-28 Iveco Fiat Procede et appareillage pour effectuer un traitement anti-usure sur un cylindre de moteur endothermique et cylindre ainsi obtenu

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2009305A1 (de) * 1970-02-27 1971-09-23 Siepmann-Werke Kg, 4785 Belecke Reifen- oder Gleitschutznetz für Fahrzeugreifen sowie Verfahren zu seiner Herstellung
DE2419383B1 (de) * 1974-04-23 1975-07-10 Fried. Krupp Huettenwerke Ag, 4630 Bochum Verfahren zum Herstellen von Tiefziehteilen
FR2331416A1 (fr) * 1975-11-17 1977-06-10 Caterpillar Tractor Co Micro-asperites produites par un faisceau d'energie corpusculaire
FR2341665A1 (fr) * 1976-02-17 1977-09-16 United Technologies Corp Articles metalliques a microstructure composite
FR2385810A1 (fr) * 1977-03-28 1978-10-27 Avco Everett Res Lab Inc Procede de formation d'une couche superficielle d'alliage par fusion au laser d'un metal d'apport sur un substrat metallique
GB2026649A (en) * 1978-08-11 1980-02-06 Steigerwald Stahltechink Gmbh Piston having at least one piston ring groove
DE2940127A1 (de) * 1978-10-05 1980-04-17 Coherent Inc Verfahren und vorrichtung zur waermebehandlung
FR2476524A1 (fr) * 1980-02-27 1981-08-28 Sumitomo Metal Ind Procede pour travailler la surface d'un cylindre de laminage a froid
EP0119182A1 (de) * 1983-03-11 1984-09-19 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Verfahren zur Verbesserung der Oberflächeneigenschaften von Walzen
EP0144817A2 (de) * 1983-12-03 1985-06-19 MAN B & W Diesel Aktiengesellschaft Verfahren zur Herstellung verschleissfester Zylinderlaufflächen von Brennkraftmaschinen
FR2570718A1 (fr) * 1984-09-21 1986-03-28 Iveco Fiat Procede et appareillage pour effectuer un traitement anti-usure sur un cylindre de moteur endothermique et cylindre ainsi obtenu

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3202944A4 (de) * 2014-10-02 2018-03-28 Nippon Steel & Sumitomo Metal Corporation Herdrolle und herstellungsverfahren dafür

Also Published As

Publication number Publication date
FR2594851A1 (fr) 1987-08-28
JPS62253713A (ja) 1987-11-05

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