GB406029A - Improvements relating to the manufacture of railway and tramway rails - Google Patents
Improvements relating to the manufacture of railway and tramway railsInfo
- Publication number
- GB406029A GB406029A GB2318332A GB2318332A GB406029A GB 406029 A GB406029 A GB 406029A GB 2318332 A GB2318332 A GB 2318332A GB 2318332 A GB2318332 A GB 2318332A GB 406029 A GB406029 A GB 406029A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rail
- class
- iron
- cooling
- head
- 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 the treatment of railway and tramway rails by cooling them through the critical range by spraying with finely divided or atomised water, the water is delivered to the atomiser under such conditions of quantity and head that the rate of cooling through the critical range is increased by at least 50 per cent above that indicated in Specification 18972/14, [Class 72, Iron &c.], the head of water supply being reduced during the treatment to such an extent that when the temperature of the upper portions of the head of the rail has fallen to that desired, this temperature remains constant until the operation is complete. This cooling operation may be proceeded by a cooling operation sufficient to cool a desired depth of the head to below the critical range and then allowing the temperature of the rail to even out until the internal heat has reheated the cooled part to a temperature above the critical range. To minimise camber in the treated rail, the lighter parts of the rail may be cooled as described in Specification 192,446, [Class 72, Iron &c.], and the rail after cooling as described above may be further cooled as described in Specification 324,686, [Class 72, Iron &c.]. Specifications 1878/15, 8257/15, and 8258/15, [all in Class 72, Iron &c.], also are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2318332A GB406029A (en) | 1932-08-18 | 1932-08-18 | Improvements relating to the manufacture of railway and tramway rails |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2318332A GB406029A (en) | 1932-08-18 | 1932-08-18 | Improvements relating to the manufacture of railway and tramway rails |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB406029A true GB406029A (en) | 1934-02-19 |
Family
ID=10191492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2318332A Expired GB406029A (en) | 1932-08-18 | 1932-08-18 | Improvements relating to the manufacture of railway and tramway rails |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB406029A (en) |
-
1932
- 1932-08-18 GB GB2318332A patent/GB406029A/en not_active Expired
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