JPS55125231A - Production of weldable low alloy heat treated hard top rail - Google Patents
Production of weldable low alloy heat treated hard top railInfo
- Publication number
- JPS55125231A JPS55125231A JP3141879A JP3141879A JPS55125231A JP S55125231 A JPS55125231 A JP S55125231A JP 3141879 A JP3141879 A JP 3141879A JP 3141879 A JP3141879 A JP 3141879A JP S55125231 A JPS55125231 A JP S55125231A
- Authority
- JP
- Japan
- Prior art keywords
- rail
- low alloy
- production
- heat treated
- top rail
- 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.)
- Granted
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
PURPOSE:To produce the rail which is easy to weld and forms the zeld zone in which the material characteristics, such as strength and structure of the weld zone, have not much difference from those of base metals, by making the cooling conditions equivalent to the rate of cooling at the rail welding at the time of heat-treating the top part of the rail made of high carbon low alloy steel. CONSTITUTION:The rail is produced by the high carbon low alloy steel which contains C; 0.55-0.85%, Si; 0.50-1.20%, Mn; 0.80-1.50%, Al; 0.005-0.05% or further contains Cr; 0.20-0.90%, Nb; 0.004-0.010% and contains these so that the total amount of Cr+Mn becomes 1.60% or less. The top surface layer of this rail is heated to 850 deg.C or more to austenitize its structure, after which it is quenched at 50-400 seconds between 800 deg.C and 550 deg.C. The structure becomes fine pearlite from the rail top surface layer down to a depth of 10mm and the rail of the superior weldability whose tensile strength at ordinary temperature is 120kg/mm<2> or more and surface hardness HB330 or more may be produced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3141879A JPS5919173B2 (en) | 1979-03-17 | 1979-03-17 | Manufacturing method of weldable low-alloy heat-treated hard-headed rail |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3141879A JPS5919173B2 (en) | 1979-03-17 | 1979-03-17 | Manufacturing method of weldable low-alloy heat-treated hard-headed rail |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55125231A true JPS55125231A (en) | 1980-09-26 |
JPS5919173B2 JPS5919173B2 (en) | 1984-05-02 |
Family
ID=12330704
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3141879A Expired JPS5919173B2 (en) | 1979-03-17 | 1979-03-17 | Manufacturing method of weldable low-alloy heat-treated hard-headed rail |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5919173B2 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57198216A (en) * | 1981-05-27 | 1982-12-04 | Nippon Kokan Kk <Nkk> | Manufacture of high-strength rail |
JPS62127453A (en) * | 1985-11-26 | 1987-06-09 | Nippon Kokan Kk <Nkk> | High-efficiency rail excellent in toughness and ductility and its production |
JPS62278247A (en) * | 1986-02-17 | 1987-12-03 | Nippon Kokan Kk <Nkk> | High-carbon steel material for hot-pressure welding excellent in property at welded joint |
JPS6324045A (en) * | 1986-07-16 | 1988-02-01 | Nippon Kokan Kk <Nkk> | Wear resistant rail having high performance and superior capacity to stop propagation of unstable rupture |
JPH02282448A (en) * | 1989-04-20 | 1990-11-20 | Nippon Steel Corp | Rail having excellent rolling contact fatigue damage resistance |
US5482576A (en) * | 1992-01-11 | 1996-01-09 | Bwg Butzbacher Weichenbau, Gmbh | Railway-track elements and method of manufacturing them |
USRE40263E1 (en) | 1994-11-15 | 2008-04-29 | Nippon Steel Corporation | Pearlitic steel rail having excellent wear resistance and method of producing the same |
CN112063826A (en) * | 2020-08-28 | 2020-12-11 | 攀钢集团攀枝花钢铁研究院有限公司 | 1300 MPa-level low-alloy heat treatment steel rail postweld heat treatment method |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU663023B2 (en) * | 1993-02-26 | 1995-09-21 | Nippon Steel Corporation | Process for manufacturing high-strength bainitic steel rails with excellent rolling-contact fatigue resistance |
-
1979
- 1979-03-17 JP JP3141879A patent/JPS5919173B2/en not_active Expired
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57198216A (en) * | 1981-05-27 | 1982-12-04 | Nippon Kokan Kk <Nkk> | Manufacture of high-strength rail |
JPS6323244B2 (en) * | 1981-05-27 | 1988-05-16 | Nippon Kokan Kk | |
JPS62127453A (en) * | 1985-11-26 | 1987-06-09 | Nippon Kokan Kk <Nkk> | High-efficiency rail excellent in toughness and ductility and its production |
JPH0530883B2 (en) * | 1985-11-26 | 1993-05-11 | Nippon Kokan Kk | |
JPH0443978B2 (en) * | 1986-02-17 | 1992-07-20 | Nippon Kokan Kk | |
JPS62278247A (en) * | 1986-02-17 | 1987-12-03 | Nippon Kokan Kk <Nkk> | High-carbon steel material for hot-pressure welding excellent in property at welded joint |
JPS6324045A (en) * | 1986-07-16 | 1988-02-01 | Nippon Kokan Kk <Nkk> | Wear resistant rail having high performance and superior capacity to stop propagation of unstable rupture |
JPH02282448A (en) * | 1989-04-20 | 1990-11-20 | Nippon Steel Corp | Rail having excellent rolling contact fatigue damage resistance |
US5482576A (en) * | 1992-01-11 | 1996-01-09 | Bwg Butzbacher Weichenbau, Gmbh | Railway-track elements and method of manufacturing them |
USRE40263E1 (en) | 1994-11-15 | 2008-04-29 | Nippon Steel Corporation | Pearlitic steel rail having excellent wear resistance and method of producing the same |
USRE41033E1 (en) | 1994-11-15 | 2009-12-08 | Nippn Steel Corporation | Pearlitic steel rail having excellent wear resistance and method of producing the same |
USRE42360E1 (en) | 1994-11-15 | 2011-05-17 | Nippon Steel Corporation | Pearlitic steel rail having excellent wear resistance and method of producing the same |
USRE42668E1 (en) | 1994-11-15 | 2011-09-06 | Nippon Steel Corporation | Pearlitic steel rail having excellent wear resistance and method of producing the same |
CN112063826A (en) * | 2020-08-28 | 2020-12-11 | 攀钢集团攀枝花钢铁研究院有限公司 | 1300 MPa-level low-alloy heat treatment steel rail postweld heat treatment method |
Also Published As
Publication number | Publication date |
---|---|
JPS5919173B2 (en) | 1984-05-02 |
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