GB536401A - Improvements in the manufacture of railway and tramway rails - Google Patents
Improvements in the manufacture of railway and tramway railsInfo
- Publication number
- GB536401A GB536401A GB794239A GB794239A GB536401A GB 536401 A GB536401 A GB 536401A GB 794239 A GB794239 A GB 794239A GB 794239 A GB794239 A GB 794239A GB 536401 A GB536401 A GB 536401A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rails
- produce
- railway
- temperature
- critical 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
536,401. Heat treating rails. SANDBERG, C. P., SANDBERG, O. F. A., and HUMFREY, J. C. W. March 11, 1939, Nos. 7942 and 23523. Drawings to Specification. [Class 72] To produce a spheroidized structure in the wearing surface of railway and tramway rails, the latter are quenched from a temperature above the critical range on heating at such a rate to a temperature below the critical range on cooling to produce a marlensitic structure and then tempered at 650‹C. or at a temperature above 650‹C. and below the critical range on heating to produce the desired result. The rails may be heated to above the critical temperature before treating it as described above and this treatment may be repeated once or more. The steel may also contain up to 1.5 per cent. of chromium, up to 3.5 of nickel or up to 0.6 of molybdenum. Specifications 324,686, [Class 72], 406,029 and 487,428, [Group XIX], are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB794239A GB536401A (en) | 1939-03-11 | 1939-03-11 | Improvements in the manufacture of railway and tramway rails |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB794239A GB536401A (en) | 1939-03-11 | 1939-03-11 | Improvements in the manufacture of railway and tramway rails |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB536401A true GB536401A (en) | 1941-05-19 |
Family
ID=9842729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB794239A Expired GB536401A (en) | 1939-03-11 | 1939-03-11 | Improvements in the manufacture of railway and tramway rails |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB536401A (en) |
-
1939
- 1939-03-11 GB GB794239A patent/GB536401A/en not_active Expired
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