ES346099A1 - Heat Treatment Process for Rails - Google Patents
Heat Treatment Process for RailsInfo
- Publication number
- ES346099A1 ES346099A1 ES346099A ES346099A ES346099A1 ES 346099 A1 ES346099 A1 ES 346099A1 ES 346099 A ES346099 A ES 346099A ES 346099 A ES346099 A ES 346099A ES 346099 A1 ES346099 A1 ES 346099A1
- Authority
- ES
- Spain
- Prior art keywords
- rail
- bed
- rails
- heat treatment
- bainitic transformation
- 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
- C21D1/34—Methods of heating
- C21D1/53—Heating in fluidised beds
-
- 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)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
Steel rails are heat-treated by immersing the still-hot rail emerging from the rolling mill e.g. at 900 C. into a fluidized bed of pulverulent material, e.g. powdered Cr, maintained constantly at 150-300 C, which is lower than the bainitic transformation temperature, to effect cooling without martensite formation. Preferably, the cooled rail is conveyed to a second medium, e.g. a similar bed or a furnace, maintained at 380-450 C. to ensure uniform isothermal bainitic transformation, and then tempered by re-heating it to 420-550 C., prior to cooling in calm air. The rail may be immersed inverted into the bed with its flange at the top and horizontal so that stagnant particles above insulate this part of its surface as described in Specification 1,131, 662.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR81414A FR90945E (en) | 1966-10-24 | 1966-10-24 | Method and installation of heat treatment of rails |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES346099A1 true ES346099A1 (en) | 1968-12-01 |
Family
ID=8619844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES346099A Expired ES346099A1 (en) | 1966-10-24 | 1967-10-05 | Heat Treatment Process for Rails |
Country Status (12)
| Country | Link |
|---|---|
| AT (1) | AT287039B (en) |
| BE (1) | BE704665A (en) |
| DE (1) | DE1583421B2 (en) |
| ES (1) | ES346099A1 (en) |
| FI (1) | FI46984C (en) |
| FR (1) | FR90945E (en) |
| GB (1) | GB1151609A (en) |
| LU (1) | LU54728A1 (en) |
| NL (1) | NL6714272A (en) |
| OA (1) | OA02669A (en) |
| PL (1) | PL79264B1 (en) |
| SE (1) | SE334171B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1600086A (en) * | 1968-12-30 | 1970-07-20 | ||
| DE2940826C2 (en) * | 1979-10-09 | 1987-03-26 | Fa. Paul Ferd. Peddinghaus, 5820 Gevelsberg | Process for deep hardening of workpieces and device for carrying out this process |
| CA1193176A (en) * | 1982-07-06 | 1985-09-10 | Robert J. Ackert | Method for the production of improved railway rails by accelerated colling in line with the production rolling mill |
-
1966
- 1966-10-24 FR FR81414A patent/FR90945E/en not_active Expired
-
1967
- 1967-10-04 BE BE704665D patent/BE704665A/xx unknown
- 1967-10-05 ES ES346099A patent/ES346099A1/en not_active Expired
- 1967-10-06 OA OA53071A patent/OA02669A/en unknown
- 1967-10-12 SE SE13945/67A patent/SE334171B/xx unknown
- 1967-10-18 AT AT941267A patent/AT287039B/en not_active IP Right Cessation
- 1967-10-20 FI FI672824A patent/FI46984C/en active
- 1967-10-20 NL NL6714272A patent/NL6714272A/xx unknown
- 1967-10-21 PL PL1967123156A patent/PL79264B1/pl unknown
- 1967-10-21 DE DE19671583421 patent/DE1583421B2/en active Pending
- 1967-10-23 GB GB48039/67A patent/GB1151609A/en not_active Expired
- 1967-10-24 LU LU54728D patent/LU54728A1/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| SE334171B (en) | 1971-04-19 |
| DE1583421A1 (en) | 1971-04-01 |
| PL79264B1 (en) | 1975-06-30 |
| LU54728A1 (en) | 1968-01-26 |
| FI46984B (en) | 1973-05-02 |
| BE704665A (en) | 1968-02-15 |
| OA02669A (en) | 1970-12-15 |
| DE1583421B2 (en) | 1971-04-01 |
| FR90945E (en) | 1968-03-08 |
| FI46984C (en) | 1973-08-10 |
| AT287039B (en) | 1971-01-11 |
| NL6714272A (en) | 1968-04-25 |
| GB1151609A (en) | 1969-05-14 |
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