EP0161408A3 - Process for surface-hardening by remelting cast iron cylinders - Google Patents

Process for surface-hardening by remelting cast iron cylinders Download PDF

Info

Publication number
EP0161408A3
EP0161408A3 EP85102673A EP85102673A EP0161408A3 EP 0161408 A3 EP0161408 A3 EP 0161408A3 EP 85102673 A EP85102673 A EP 85102673A EP 85102673 A EP85102673 A EP 85102673A EP 0161408 A3 EP0161408 A3 EP 0161408A3
Authority
EP
European Patent Office
Prior art keywords
hardening
cast iron
iron cylinders
remelting
remelting cast
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.)
Granted
Application number
EP85102673A
Other languages
German (de)
Other versions
EP0161408B1 (en
EP0161408A2 (en
Inventor
Klaus Dr. Heck
Horst Dipl.-Ing. Lindner
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 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 AG filed Critical Audi AG
Publication of EP0161408A2 publication Critical patent/EP0161408A2/en
Publication of EP0161408A3 publication Critical patent/EP0161408A3/en
Application granted granted Critical
Publication of EP0161408B1 publication Critical patent/EP0161408B1/en
Expired 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
    • C21D5/00—Heat treatments of cast-iron
    • 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
    • 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
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • C21D9/14—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes wear-resistant or pressure-resistant pipes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
EP85102673A 1984-05-18 1985-03-08 Process for surface-hardening by remelting cast iron cylinders Expired EP0161408B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3418555A DE3418555C1 (en) 1984-05-18 1984-05-18 Process for remelting the surface of cylinders made of carbon-containing cast iron
DE3418555 1984-05-18

Publications (3)

Publication Number Publication Date
EP0161408A2 EP0161408A2 (en) 1985-11-21
EP0161408A3 true EP0161408A3 (en) 1986-07-23
EP0161408B1 EP0161408B1 (en) 1989-04-26

Family

ID=6236254

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85102673A Expired EP0161408B1 (en) 1984-05-18 1985-03-08 Process for surface-hardening by remelting cast iron cylinders

Country Status (3)

Country Link
EP (1) EP0161408B1 (en)
JP (1) JPS60245725A (en)
DE (2) DE3418555C1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3510393C1 (en) * 1985-03-22 1986-04-03 Daimler-Benz Ag, 7000 Stuttgart Cylinder crankcase for an internal combustion engine
DE4124644A1 (en) * 1991-07-25 1993-01-28 Audi Ag Hardening internal surface of esp. cylinders - using structured rollers to heat surface by electro-resistance heating and movement of roller electrode over workpiece surface
DE4241527A1 (en) * 1992-12-10 1994-06-16 Opel Adam Ag Process for hardening and possibly smoothing machine components as well as machine components manufactured according to this process
ITRE20050025A1 (en) * 2005-03-10 2006-09-11 Ognibene Spa METHOD AND EQUIPMENT FOR THE HARDENING OF THE INTERNAL SURFACE OF HOLES, IN MECHANICAL PIECES OF CAST IRON WITH A FERRITIC MATRIX
DE102013219784A1 (en) * 2013-09-30 2015-04-02 Federal-Mogul Friedberg Gmbh Slip rings with leatherburitic structure on the surface

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2134662A1 (en) * 1971-07-12 1973-01-25 Teves Thompson Gmbh Strengthening metal parts - partic increasing the strength of valves in ic engines
DE2811400A1 (en) * 1978-03-16 1979-09-20 Aeg Elotherm Gmbh Surface hardening of workpieces by arc remelting - esp. cast iron camshafts, where local remelting is followed by slow cooling to prevent cracking and martensite formation

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57158319A (en) * 1981-03-24 1982-09-30 Toyota Motor Corp Partial surface hardening method using pulse tig welding machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2134662A1 (en) * 1971-07-12 1973-01-25 Teves Thompson Gmbh Strengthening metal parts - partic increasing the strength of valves in ic engines
DE2811400A1 (en) * 1978-03-16 1979-09-20 Aeg Elotherm Gmbh Surface hardening of workpieces by arc remelting - esp. cast iron camshafts, where local remelting is followed by slow cooling to prevent cracking and martensite formation

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
METAL SCIENCE AND HEAT TREATMENT, Band 26, Nr. 9/10, Oktober/November 1984, Seiten 673-675, Plenum Publishing Corp., New York, US; V.S. VELIKIKH et al.: "Influence of the coefficient of overlapping of hardening "spots" on the residual stresses after laser treament" *
PATENTS ABSTRACTS OF JAPAN, Band 6, Nr. 266 (C-142) [1144], 25. Dezember 1982; & JP - A - 57 158 319 (TOYOTA JIDOSHA KOGYO K.K.) 30.09.1982 *

Also Published As

Publication number Publication date
DE3569751D1 (en) 1989-06-01
DE3418555C1 (en) 1985-07-25
EP0161408B1 (en) 1989-04-26
JPH0149773B2 (en) 1989-10-26
EP0161408A2 (en) 1985-11-21
JPS60245725A (en) 1985-12-05

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