FR2403392A1 - PROCESS FOR MAKING REFUSION HARDENED SURFACES - Google Patents

PROCESS FOR MAKING REFUSION HARDENED SURFACES

Info

Publication number
FR2403392A1
FR2403392A1 FR7826417A FR7826417A FR2403392A1 FR 2403392 A1 FR2403392 A1 FR 2403392A1 FR 7826417 A FR7826417 A FR 7826417A FR 7826417 A FR7826417 A FR 7826417A FR 2403392 A1 FR2403392 A1 FR 2403392A1
Authority
FR
France
Prior art keywords
refusion
making
hardened
hardened surfaces
reflow
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Withdrawn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
FR7826417A
Other languages
French (fr)
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.)
Audi AG
Original Assignee
Audi NSU Auto Union AG
Audi AG
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 Audi NSU Auto Union AG, Audi AG filed Critical Audi NSU Auto Union AG
Publication of FR2403392A1 publication Critical patent/FR2403392A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/30—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for crankshafts; for camshafts
    • 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
    • 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
    • C21D5/00—Heat treatments of cast-iron

Abstract

Ce procédé a pour but de régler à volonté le durcissement par refusion de pièces en fonte sous atmosphère gazeuse. La quantité d'oxygène fixée sur la surface à durcir est réglée d'après la densité superficielle voulue de la porosité de la surface durcie; les bandes de refusion se recouvrent dans une mesure qui dépend de la finesse de pores voulue. Ce procédé est utilisé pour les arbres à cames.The purpose of this process is to adjust the hardening by reflow of cast iron parts in a gaseous atmosphere at will. The quantity of oxygen fixed on the surface to be hardened is regulated according to the desired surface density of the porosity of the hardened surface; the reflow bands overlap to an extent which depends on the desired pore fineness. This process is used for camshafts.

FR7826417A 1977-09-15 1978-09-14 PROCESS FOR MAKING REFUSION HARDENED SURFACES Withdrawn FR2403392A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2741567A DE2741567C2 (en) 1977-09-15 1977-09-15 Process for producing remelt hardening hardened surfaces

Publications (1)

Publication Number Publication Date
FR2403392A1 true FR2403392A1 (en) 1979-04-13

Family

ID=6019038

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7826417A Withdrawn FR2403392A1 (en) 1977-09-15 1978-09-14 PROCESS FOR MAKING REFUSION HARDENED SURFACES

Country Status (5)

Country Link
JP (1) JPS5461011A (en)
DE (1) DE2741567C2 (en)
FR (1) FR2403392A1 (en)
GB (1) GB2004919B (en)
IT (1) IT1099077B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2442395A1 (en) * 1978-11-27 1980-06-20 Bachofen Ag MEMBRANE APPARATUS FOR REMOVABLY CONNECTING A BYPASS TO A PRESSURE PIPE
EP0194506A1 (en) * 1985-03-01 1986-09-17 Toyota Jidosha Kabushiki Kaisha Process for producing camshaft with cams subjected to remelting chilling treatment
FR2663647A1 (en) * 1990-06-22 1991-12-27 Peugeot Cam possessing a peripheral surface which is treated and hardened in order to be wear resistant, and shaft fitted with at least one such cam

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980002434A1 (en) * 1979-05-07 1980-11-13 Commw Scient Ind Res Org Surface hardening of metals by electric arc discharge
JPS57163140A (en) * 1981-04-02 1982-10-07 Nippon Piston Ring Co Ltd Piston ring
JPS5974296U (en) * 1982-11-09 1984-05-19 ミサワホ−ム株式合社 Satsushi with integrated ventilation frame
DD211983A1 (en) * 1982-12-09 1984-08-01 Zentralinstitut Schweiss METHOD OF MELTING, IN PARTICULAR MOTOR PISTON, BY ELECTRON BEAM
CA1236382A (en) * 1984-03-07 1988-05-10 Kenji Fujii Method of and apparatus for remelting and hardening a shaft
GB2169318A (en) * 1985-01-04 1986-07-09 Rolls Royce Metal surface hardening by carbide formation
JPS6233720A (en) * 1985-08-08 1987-02-13 Toyota Motor Corp Production of chilled cam shaft by remelting
JPS6293314A (en) * 1985-10-21 1987-04-28 Honda Motor Co Ltd Wear resistant sliding member
GB2376433A (en) * 2001-06-14 2002-12-18 Federal Mogul Camshaft Casting Manufacturing camshafts

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2763583A (en) * 1953-03-26 1956-09-18 Kawasaki Sozo Process for manufacturing porous cast iron

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5149573B2 (en) * 1971-09-09 1976-12-27

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2763583A (en) * 1953-03-26 1956-09-18 Kawasaki Sozo Process for manufacturing porous cast iron

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2442395A1 (en) * 1978-11-27 1980-06-20 Bachofen Ag MEMBRANE APPARATUS FOR REMOVABLY CONNECTING A BYPASS TO A PRESSURE PIPE
EP0194506A1 (en) * 1985-03-01 1986-09-17 Toyota Jidosha Kabushiki Kaisha Process for producing camshaft with cams subjected to remelting chilling treatment
FR2663647A1 (en) * 1990-06-22 1991-12-27 Peugeot Cam possessing a peripheral surface which is treated and hardened in order to be wear resistant, and shaft fitted with at least one such cam

Also Published As

Publication number Publication date
IT1099077B (en) 1985-09-18
IT7827683A0 (en) 1978-09-14
GB2004919B (en) 1982-01-13
GB2004919A (en) 1979-04-11
DE2741567C2 (en) 1981-09-24
DE2741567A1 (en) 1979-03-29
JPS5461011A (en) 1979-05-17
JPS576494B2 (en) 1982-02-05

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Legal Events

Date Code Title Description
ST Notification of lapse