GB1510608A - Process for the heat-treatment of railway switch parts - Google Patents
Process for the heat-treatment of railway switch partsInfo
- Publication number
- GB1510608A GB1510608A GB38713/76A GB3871376A GB1510608A GB 1510608 A GB1510608 A GB 1510608A GB 38713/76 A GB38713/76 A GB 38713/76A GB 3871376 A GB3871376 A GB 3871376A GB 1510608 A GB1510608 A GB 1510608A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stage
- compressed air
- blowing
- rail surface
- perlite 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B7/00—Switches; Crossings
- E01B7/10—Frogs
- E01B7/12—Fixed frogs made of one part or composite
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
In order to take more account of the cross-sectional shape in heat treatment and to be able to treat the switch components continuously under control, the rail surface is first heated down to a depth of up to 30 mm to the austenitisation temperature. The austenitised rail surface is then quenched by blowing with compressed air. In a first stage, quenching is effected from the austenitisation temperature down to just above the region of the perlite transformation at 650 to 450 DEG C by strong blowing and subsequently, in at least one second stage, the quenching is continued by blowing which is restricted as compared with the first stage in such a way that the temperature range set on the rail surface before the perlite transformation is not exceeded and this cooling intensity is retained in the region of the fastest perlite transformation until the perlite transformation is complete. Preferably, the compressed air is blown only from above onto the switch components standing on the foot and moving continuously forwards. The width of each compressed air jet here corresponds to at least the maximum width of the switch component. <IMAGE>
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2541978A DE2541978C3 (en) | 1975-09-20 | 1975-09-20 | Process for the heat treatment of switch parts in a continuous process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1510608A true GB1510608A (en) | 1978-05-10 |
Family
ID=5956971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB38713/76A Expired GB1510608A (en) | 1975-09-20 | 1976-09-17 | Process for the heat-treatment of railway switch parts |
Country Status (15)
| Country | Link |
|---|---|
| AT (1) | AT386841B (en) |
| BE (1) | BE846377A (en) |
| BG (1) | BG39807A3 (en) |
| CH (1) | CH621364A5 (en) |
| DD (1) | DD126536A5 (en) |
| DE (1) | DE2541978C3 (en) |
| FI (1) | FI762667A (en) |
| FR (1) | FR2324743A1 (en) |
| GB (1) | GB1510608A (en) |
| IT (1) | IT1068280B (en) |
| LU (1) | LU75832A1 (en) |
| NL (1) | NL7609909A (en) |
| RO (1) | RO72116A (en) |
| YU (1) | YU37191B (en) |
| ZA (1) | ZA765542B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| DE3446794C1 (en) * | 1984-12-21 | 1986-01-02 | BWG Butzbacher Weichenbau GmbH, 6308 Butzbach | Process for the heat treatment of pearlitic rail steel |
| AT391707B (en) * | 1985-03-25 | 1990-11-26 | Voest Alpine Ag | METHOD FOR PREVENTING ADJUSTMENT OF RAILS IN THE TRANSITIONAL AREA AND DEVICE FOR CARRYING OUT THIS METHOD |
| AT384624B (en) * | 1986-05-22 | 1987-12-10 | Voest Alpine Ag | DEVICE FOR CONTROLLED HEAT TREATMENT OF SOFT PARTS |
| AT401359B (en) * | 1991-04-05 | 1996-08-26 | Vae Ag | METHOD FOR PRODUCING A HEART PIECE |
| DE4200545A1 (en) * | 1992-01-11 | 1993-07-15 | Butzbacher Weichenbau Gmbh | TRACK PARTS AND METHOD FOR THE PRODUCTION THEREOF |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1758517B1 (en) * | 1967-06-29 | 1970-12-10 | Inst Cercetari Tehnologice Pen | Process for the heat treatment of elongated workpieces with a cross-sectional shape that changes in the longitudinal direction |
| DE1938290A1 (en) * | 1968-08-13 | 1970-02-19 | Union Carbide Corp | Method and device for hardening rails |
-
1975
- 1975-09-20 DE DE2541978A patent/DE2541978C3/en not_active Expired
-
1976
- 1976-09-07 NL NL7609909A patent/NL7609909A/en not_active Application Discontinuation
- 1976-09-13 AT AT0676276A patent/AT386841B/en not_active IP Right Cessation
- 1976-09-15 YU YU2254/76A patent/YU37191B/en unknown
- 1976-09-15 ZA ZA765542A patent/ZA765542B/en unknown
- 1976-09-16 CH CH1176176A patent/CH621364A5/en not_active IP Right Cessation
- 1976-09-17 IT IT27331/76A patent/IT1068280B/en active
- 1976-09-17 LU LU75832A patent/LU75832A1/xx unknown
- 1976-09-17 FI FI762667A patent/FI762667A/fi not_active Application Discontinuation
- 1976-09-17 BG BG7634229A patent/BG39807A3/en unknown
- 1976-09-17 GB GB38713/76A patent/GB1510608A/en not_active Expired
- 1976-09-17 DD DD194843A patent/DD126536A5/xx unknown
- 1976-09-20 BE BE170770A patent/BE846377A/en not_active IP Right Cessation
- 1976-09-20 FR FR7628144A patent/FR2324743A1/en not_active Withdrawn
- 1976-09-20 RO RO7687589A patent/RO72116A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2541978B2 (en) | 1977-12-15 |
| FR2324743A1 (en) | 1977-04-15 |
| CH621364A5 (en) | 1981-01-30 |
| BE846377A (en) | 1977-01-17 |
| YU225476A (en) | 1983-04-27 |
| LU75832A1 (en) | 1977-05-04 |
| BG39807A3 (en) | 1986-08-15 |
| IT1068280B (en) | 1985-03-21 |
| DE2541978C3 (en) | 1978-08-24 |
| NL7609909A (en) | 1977-03-22 |
| FI762667A (en) | 1977-03-21 |
| DE2541978A1 (en) | 1977-03-24 |
| DD126536A5 (en) | 1977-07-20 |
| AT386841B (en) | 1988-10-25 |
| YU37191B (en) | 1984-08-31 |
| RO72116A (en) | 1981-11-04 |
| ATA676276A (en) | 1980-01-15 |
| ZA765542B (en) | 1977-08-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19950917 |