JPS5647517A - Ferrite transformation for cast iron - Google Patents
Ferrite transformation for cast ironInfo
- 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
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
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.
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)
| 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 |
-
1979
- 1979-09-26 JP JP12255079A patent/JPS5647517A/en active Pending
Cited By (2)
| 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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