JPS5647517A - Ferrite transformation for cast iron - Google Patents

Ferrite transformation for cast iron

Info

Publication number
JPS5647517A
JPS5647517A JP12255079A JP12255079A JPS5647517A JP S5647517 A JPS5647517 A JP S5647517A JP 12255079 A JP12255079 A JP 12255079A JP 12255079 A JP12255079 A JP 12255079A JP S5647517 A JPS5647517 A JP S5647517A
Authority
JP
Japan
Prior art keywords
cast iron
ferrite
treatment
tray
transformed
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.)
Pending
Application number
JP12255079A
Other languages
Japanese (ja)
Inventor
Kuniaki Mizuno
Tsutomu Sekiguchi
Koji Kato
Kiyoharu Yamada
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.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
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 Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP12255079A priority Critical patent/JPS5647517A/en
Publication of JPS5647517A publication Critical patent/JPS5647517A/en
Pending 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

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)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

PURPOSE:To easily transform, the basic structure of cast iron into ferrite structure by a method wherein a cast iron after treatment of the first stage graphitization is gradually cooled at a specific cooling speed. CONSTITUTION:A cast iron is subject to the first stage graphitization treatment, covered with an insulating material, and gradually cooled at a cooling speed below 900 deg.C/hr so that it is transformed into ferrite structure without the need for the second graphitization treatment. Typically, a cast iron mounting device 6 is used to mount a work cast iron 10 on a tray 12 and a ferrite annealing is conducted in the first stage graphitization furnace 1. As soon as the cast iron 10 is taken out at the discharge location 2, it is placed in a gradual-cooling cover device 5 and a gradual cooling cover 11 is mounted onto the tray 12. Then, a conveyor mechanism 4 is used to cool it at a speed of less than 900 deg.C/hr. A detacher 7 is used to remove the cover 11 which is returned to the original position by a return conveyor 4'. The ferrite-transformed cast iron 9 is discharged by a product taking out device 8. The process thus ensures structuring of ferrite base.
JP12255079A 1979-09-26 1979-09-26 Ferrite transformation for cast iron Pending JPS5647517A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12255079A JPS5647517A (en) 1979-09-26 1979-09-26 Ferrite transformation for cast iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12255079A JPS5647517A (en) 1979-09-26 1979-09-26 Ferrite transformation for cast iron

Publications (1)

Publication Number Publication Date
JPS5647517A true JPS5647517A (en) 1981-04-30

Family

ID=14838642

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12255079A Pending JPS5647517A (en) 1979-09-26 1979-09-26 Ferrite transformation for cast iron

Country Status (1)

Country Link
JP (1) JPS5647517A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5011266A (en) * 1987-01-26 1991-04-30 Ricoh Company, Ltd. Liquid crystal display device
US5067796A (en) * 1987-01-26 1991-11-26 Ricoh Company, Ltd. Liquid crystal display device with cut-out portions in lead electrodes for connection to driving circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5011266A (en) * 1987-01-26 1991-04-30 Ricoh Company, Ltd. Liquid crystal display device
US5067796A (en) * 1987-01-26 1991-11-26 Ricoh Company, Ltd. Liquid crystal display device with cut-out portions in lead electrodes for connection to driving circuit

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