GB393573A - Improvements in or relating to the manufacture of railway and tramway rails - Google Patents
Improvements in or relating to the manufacture of railway and tramway railsInfo
- Publication number
- GB393573A GB393573A GB30615/31A GB3061531A GB393573A GB 393573 A GB393573 A GB 393573A GB 30615/31 A GB30615/31 A GB 30615/31A GB 3061531 A GB3061531 A GB 3061531A GB 393573 A GB393573 A GB 393573A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rails
- cooling
- railway
- manufacture
- range
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/04—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rails
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)
- Heat Treatment Of Articles (AREA)
Abstract
In a process for the manufacture of railway and tramway rails, the rails after having been cooled through the critical range are subjected to a retarded rate of cooling the lower limit of the temperature range being below about 250 DEG C. and preferably about 50 DEG C. above the temperature of the atmosphere in which the rails are exposed for the final cooling. The upper limit of the retarded cooling range may be about 350 DEG C. or between the loss of redness in a dim light and 350 DEG C. The rails may be removed straight from the hot bed or may have been subjected to an accelerated cooling through the critical range following by a tempering below the critical range. For the retarded cooling, the rails are placed in a thermally-protected chamber.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA393573X | 1931-07-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB393573A true GB393573A (en) | 1933-06-06 |
Family
ID=4171519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30615/31A Expired GB393573A (en) | 1931-07-06 | 1931-11-04 | Improvements in or relating to the manufacture of railway and tramway rails |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB393573A (en) |
-
1931
- 1931-11-04 GB GB30615/31A patent/GB393573A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB426420A (en) | Improvements in resilient and sound insulating supports for machinery | |
| GB393573A (en) | Improvements in or relating to the manufacture of railway and tramway rails | |
| US2087346A (en) | Method of producing steel rails | |
| GB324686A (en) | Improvements relating to the manufacture of railway and tramway rails | |
| US1925029A (en) | Heat treatment of steel rails | |
| GB486044A (en) | Improvement in the manufacture of railway and tramway rails | |
| GB372316A (en) | Improvements in or relating to the heat treatment of rails such as railway or tramway rails | |
| GB385584A (en) | Process for the production of phosphor-steels | |
| GB362439A (en) | Improvements relating to processes for the heat treatment of rails or other massive steel bodies | |
| GB288579A (en) | Process for the improvement of the properties of iron-beryllium alloys | |
| GB480594A (en) | An improved method for the production of plates for cuprous oxide rectifiers | |
| GB302292A (en) | Process and apparatus for the purification of the gaseous cloud formed by the heat transformation of heavy oils | |
| GB422954A (en) | Heat treatment of steel rails | |
| GB418788A (en) | Improved process of producing a soluble phosphate fertilizer | |
| CA325546A (en) | Apparatus for quenching heat treated articles | |
| GB390851A (en) | Improvements in method of manufacturing cast iron and cast iron articles | |
| US1552744A (en) | Method of softening irom plated with aluminum | |
| US1555523A (en) | Process of annealing steel | |
| GB308346A (en) | ||
| GB343043A (en) | Wrought zinc products | |
| GB273248A (en) | Improvements in or relating to the manufacture of steel | |
| GB540078A (en) | Improvements in or relating to the hardening and tempering of projectiles | |
| GB486325A (en) | Improvements in and relating to the manufacture of glass vessels | |
| GB285814A (en) | Process for the manufacture of steel | |
| GB457488A (en) | Improved method of and apparatus for tempering glass |