GB202464A - Improvements in process of and apparatus for manufacturing malleable cast iron - Google Patents
Improvements in process of and apparatus for manufacturing malleable cast ironInfo
- Publication number
- GB202464A GB202464A GB1763222A GB1763222A GB202464A GB 202464 A GB202464 A GB 202464A GB 1763222 A GB1763222 A GB 1763222A GB 1763222 A GB1763222 A GB 1763222A GB 202464 A GB202464 A GB 202464A
- Authority
- GB
- United Kingdom
- Prior art keywords
- castings
- current
- heated
- passing
- gas
- 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.)
- Expired
Links
Landscapes
- Furnace Details (AREA)
Abstract
202,464. Kubo, M. June 27, 1922. Malleableizing. - In malleableizing cast iron by passing an electric current through the castings while in a heated condition, the castings are embedded in appropriate material, hematite in the case of whiteheart castings, iron scale, bone dust, sand, or fireclay in the case of blachheart, or are immersed in a liquid bath and heated to a temperature materially below the melting point of cast iron, e.g. 900‹ C. whilst being subjected to the current. The process may be carried out in a furnace, Fig. 1, heated electrically by a resistance unit 15, the castings being packed in hematite in a fireclay tube 11. Electrodes 14 are provided in the tube 11 for passing a current directly through the articles, the current being controlled by a variable resistance 17. Other furnaces are described in which the heating is effected by gas or oil burners. In Fig. 3, the castings 32 are suspended, in a liquid bath 38 heated by gas or oil burners 35, and the current necessary for effecting the treatment is supplied to the castings through a regulating resistance 37. In a further modification, Fig.. 4, the castings are supported on a firebrick stand 41 heated by gas or oil burners 45, and the electrodes for passing a current through the castings are temporarily welded thereto. In treating castings having thick parts, the thinner portions are annealed in the manner described and the thick parts are annealed by passing directly therethrough a sufficiently heavy current to effect the heating.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1763222A GB202464A (en) | 1922-06-27 | 1922-06-27 | Improvements in process of and apparatus for manufacturing malleable cast iron |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1763222A GB202464A (en) | 1922-06-27 | 1922-06-27 | Improvements in process of and apparatus for manufacturing malleable cast iron |
Publications (1)
Publication Number | Publication Date |
---|---|
GB202464A true GB202464A (en) | 1923-08-23 |
Family
ID=10098520
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1763222A Expired GB202464A (en) | 1922-06-27 | 1922-06-27 | Improvements in process of and apparatus for manufacturing malleable cast iron |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB202464A (en) |
-
1922
- 1922-06-27 GB GB1763222A patent/GB202464A/en not_active Expired
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