GB494339A - Improvements in, or relating to, annealing and other heattreatment furnaces - Google Patents
Improvements in, or relating to, annealing and other heattreatment furnacesInfo
- Publication number
- GB494339A GB494339A GB844037A GB844037A GB494339A GB 494339 A GB494339 A GB 494339A GB 844037 A GB844037 A GB 844037A GB 844037 A GB844037 A GB 844037A GB 494339 A GB494339 A GB 494339A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lining
- gas
- annealing
- under pressure
- furnaces
- 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
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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
Abstract
494.339. Bright - annealing furnaces. BIRMINGHAM ELECTRIC FURNACES, Ltd., LOBLEY, A. G., and ROBIETTE, A. G. E. March 22, 1937, No. 8440. [Class 51 (ii)] Oxidizing impurities are purged from the porous refractory lining a<1> of the heat-treatment chamber a of a bright annealing furnace by passing non-oxidizing gas under pressure through a pipe f into the chamber a, the gas, if doors b<1>, c<1> are closed, percolating through the lining a<1> and escaping through vents d<1> in an outer spaced metal casing d closable by cover plates d<2> ; or, Fig. 4, gas is supplied under pressure through pipes f<1> in the casing d into the space e, passes through the lining and escapes through tunnels band c. During annealing this may be continued or protective gas may be supplied direct to the chamber a and forced under pressure to percolate outwards through the lining. The lining a<1> may also be enclosed in a perforated shell a2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB844037A GB494339A (en) | 1937-03-22 | 1937-03-22 | Improvements in, or relating to, annealing and other heattreatment furnaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB844037A GB494339A (en) | 1937-03-22 | 1937-03-22 | Improvements in, or relating to, annealing and other heattreatment furnaces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB494339A true GB494339A (en) | 1938-10-24 |
Family
ID=9852524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB844037A Expired GB494339A (en) | 1937-03-22 | 1937-03-22 | Improvements in, or relating to, annealing and other heattreatment furnaces |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB494339A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2543708A (en) * | 1947-05-29 | 1951-02-27 | Comstock & Wescott | Heat-treating furnace |
-
1937
- 1937-03-22 GB GB844037A patent/GB494339A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2543708A (en) * | 1947-05-29 | 1951-02-27 | Comstock & Wescott | Heat-treating furnace |
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