BG39807A3 - Method for thermic treatment of railway point work- pieces - Google Patents
Method for thermic treatment of railway point work- piecesInfo
- Publication number
- BG39807A3 BG39807A3 BG034229A BG3422976A BG39807A3 BG 39807 A3 BG39807 A3 BG 39807A3 BG 034229 A BG034229 A BG 034229A BG 3422976 A BG3422976 A BG 3422976A BG 39807 A3 BG39807 A3 BG 39807A3
- Authority
- BG
- Bulgaria
- Prior art keywords
- stage
- conversion
- running surface
- pearlite
- blowing
- Prior art date
Links
- 238000000034 method Methods 0.000 title abstract 2
- 238000007664 blowing Methods 0.000 abstract 3
- 238000006243 chemical reaction Methods 0.000 abstract 3
- 229910001562 pearlite Inorganic materials 0.000 abstract 3
- 238000001816 cooling Methods 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 230000009466 transformation Effects 0.000 abstract 1
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
Метод за топлинна обработка на части от релсови стрелки от стомани, характеризиращ се с това, че частите на стрелката се обработват топлинно непрекъснато в движение, като ходовата повърхност нагрява на дълбочина до 30 мм на аустенитизираща температура, след това аустенитизираната ходова повърхност се охлажда чрез продухване със сгъстен въздух, при което в първата степен чрез сидно продухване се охлажда от аустенитизиращата температура на 35-45'с, за предпочитане от 550 до 600'с, до пред областта на превръщането на перлита и по-нататък, в една, а понякога в няколко степени се охлажда с дроселиране спрямо първата степен продухване, така че установените граници на температурата в ходовата повърхност преди превръщането на перлита в първата степен да не се преминават и тази интензивност на охлаждането да се задържи в областта на най-бързото превръщане на перлита до завършване на превръщането му. Патентните претенции са формулирани в 5 точкиA method of heat treating parts of steel rail turnouts, characterized in that the turnout parts are heat treated continuously in motion, heating the running surface to a depth of 30 mm at the austenitizing temperature, then cooling the austenitized running surface by blowing with compressed air, in which in the first stage by side blowing it is cooled from the austenitizing temperature of 35-45'C, preferably from 550 to 600'C, to before the region of pearlite transformation and further, in one and sometimes it is cooled in several stages by throttling relative to the first stage blowing, so that the established temperature limits in the running surface before the conversion of pearlite in the first stage are not exceeded and this intensity of cooling is kept in the region of the fastest conversion of pearlite until completing its conversion. The patent claims are formulated in 5 points
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 |
|---|---|
| BG39807A3 true BG39807A3 (en) | 1986-08-15 |
Family
ID=5956971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BG034229A BG39807A3 (en) | 1975-09-20 | 1976-09-17 | Method for thermic treatment of railway point work- pieces |
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 (7)
| 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 |
| CN115852118A (en) * | 2022-12-15 | 2023-03-28 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method of low-stress high-performance steel for frog |
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 BG BG034229A patent/BG39807A3/en unknown
- 1976-09-17 GB GB38713/76A patent/GB1510608A/en not_active Expired
- 1976-09-17 FI FI762667A patent/FI762667A/fi not_active Application Discontinuation
- 1976-09-17 DD DD194843A patent/DD126536A5/xx unknown
- 1976-09-17 IT IT27331/76A patent/IT1068280B/en active
- 1976-09-17 LU LU75832A patent/LU75832A1/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 |
|---|---|
| NL7609909A (en) | 1977-03-22 |
| FR2324743A1 (en) | 1977-04-15 |
| BE846377A (en) | 1977-01-17 |
| YU37191B (en) | 1984-08-31 |
| AT386841B (en) | 1988-10-25 |
| CH621364A5 (en) | 1981-01-30 |
| DE2541978B2 (en) | 1977-12-15 |
| DD126536A5 (en) | 1977-07-20 |
| DE2541978C3 (en) | 1978-08-24 |
| IT1068280B (en) | 1985-03-21 |
| ZA765542B (en) | 1977-08-31 |
| DE2541978A1 (en) | 1977-03-24 |
| RO72116A (en) | 1981-11-04 |
| ATA676276A (en) | 1980-01-15 |
| FI762667A (en) | 1977-03-21 |
| GB1510608A (en) | 1978-05-10 |
| LU75832A1 (en) | 1977-05-04 |
| YU225476A (en) | 1983-04-27 |
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