GB191311370A - Improvements in and relating to Steel Manufacture. - Google Patents
Improvements in and relating to Steel Manufacture.Info
- Publication number
- GB191311370A GB191311370A GB191311370DA GB191311370A GB 191311370 A GB191311370 A GB 191311370A GB 191311370D A GB191311370D A GB 191311370DA GB 191311370 A GB191311370 A GB 191311370A
- Authority
- GB
- United Kingdom
- Prior art keywords
- heating
- sheets
- furnace
- reducing
- graphite
- 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
- Manufacturing Of Steel Electrode Plates (AREA)
Abstract
11,370. British Thomson-Houston Co., [General Electric Co.]. May 15. Annealing.- -Silicon steel is annealed and its magnetic qualities are improved by heating the sheets to a high temperature and subjecting them to conditions which remove the oxygen and other impurities. The sheets are heated to 1100-1325‹ C. in an electric furnace exhausted to 2-2À5 mm. of mercury, or containing a reducing-gas; or the process may be carried out in two steps by first heating the sheets under ordinary conditions to 1100-1325‹ C. and afterwards heating in the reducing-furnace to 790‹ C. or upwards. The treatment is stated to cause a coalescence of the normal small grains into larger grains. The electric furnace used may comprise a water-jacketed metal box 2 containing graphite grids 5, 6, to which current is supplied by conductors 7, 8 cooled by fluid supplied through tubes 13, 14. The heating-zone is surrounded by graphite or fire-brick screens 15. Pipes are provided for evacuating the furnace and for supplying gas thereto.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB191311370T | 1913-05-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB191311370A true GB191311370A (en) | 1914-05-14 |
Family
ID=32370737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB191311370D Expired GB191311370A (en) | 1913-05-15 | 1913-05-15 | Improvements in and relating to Steel Manufacture. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB191311370A (en) |
-
1913
- 1913-05-15 GB GB191311370D patent/GB191311370A/en not_active Expired
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