FR2391282A1 - High tensile railway track section made of carbon-manganese steel - subjected to controlled quenching on leaving hot rolling mill - Google Patents

High tensile railway track section made of carbon-manganese steel - subjected to controlled quenching on leaving hot rolling mill

Info

Publication number
FR2391282A1
FR2391282A1 FR7814997A FR7814997A FR2391282A1 FR 2391282 A1 FR2391282 A1 FR 2391282A1 FR 7814997 A FR7814997 A FR 7814997A FR 7814997 A FR7814997 A FR 7814997A FR 2391282 A1 FR2391282 A1 FR 2391282A1
Authority
FR
France
Prior art keywords
bath
mushroom
esp
pref
hot rolling
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.)
Withdrawn
Application number
FR7814997A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Centre de Recherches Metallurgiques CRM ASBL
Original Assignee
Centre de Recherches Metallurgiques CRM ASBL
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Centre de Recherches Metallurgiques CRM ASBL filed Critical Centre de Recherches Metallurgiques CRM ASBL
Publication of FR2391282A1 publication Critical patent/FR2391282A1/en
Withdrawn legal-status Critical Current

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
    • 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
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/60—Aqueous agents
    • 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
    • C21D1/62—Quenching devices
    • C21D1/63—Quenching devices for bath quenching
    • C21D1/64—Quenching devices for bath quenching with circulating liquids

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 Treatment Of Steel (AREA)

Abstract

Railway track sections are made from steel contg. 0.55-0.8% C, 0.9-1.3% Mn, and 0.15-0.35% Si. On leaving a hot rolling mill, the track is immersed in an aq. bath which has a cooling capacity above that of boiling water but below that of water at room temp.; and the track section is kept in the bath until the rail head or mushroom has cooled to 625 degrees C at a point >=15 mm below the top surface of the mushroom. The bath pref. contains materials in soln. or suspension to improve heat transfer from the track to the bath, esp. 4% Na silicate; and the bath is agitated by nozzles immersed in the bath and fitted with recirculation pumps. Local quenching is pref. employed for the mushroom, and the cooling effect of the nozzles is pref. reduced when the allotropic transformation is complete. Used for mfr. of rails, esp. vignoles rails, with min. tensile strength 110 kg/mm2 and min. 12% elongation at fracture; good resistance to shock, flaking, wear and fatigue, a fine structure with uniform hardness, esp. in the mushroom; and good weldability.
FR7814997A 1977-05-18 1978-05-12 High tensile railway track section made of carbon-manganese steel - subjected to controlled quenching on leaving hot rolling mill Withdrawn FR2391282A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE854834 1977-05-18

Publications (1)

Publication Number Publication Date
FR2391282A1 true FR2391282A1 (en) 1978-12-15

Family

ID=3861538

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7814997A Withdrawn FR2391282A1 (en) 1977-05-18 1978-05-12 High tensile railway track section made of carbon-manganese steel - subjected to controlled quenching on leaving hot rolling mill

Country Status (2)

Country Link
FR (1) FR2391282A1 (en)
LU (1) LU79669A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR543461A (en) * 1921-11-11 1922-09-04 Cie Des Forges De Chatillon Process and apparatus for the heat treatment of steels and in general of all other alloys liable to quench
FR27418E (en) * 1921-11-11 1924-07-01 Cie Des Forges De Chatillon Process and apparatus for the heat treatment of steels and, in general, of all other alloys liable to quench
GB228490A (en) * 1924-02-01 1925-08-12 Compagnie Des Forges De Chatillon Commentry Et Neuves-Maisons
LU63650A1 (en) * 1970-08-04 1971-12-03
FR2281990A1 (en) * 1974-08-16 1976-03-12 Krupp Ag Huettenwerke RAIL HEAT TREATMENT PROCESS
BE854834A (en) * 1977-05-18 1977-09-16 Centre Rech Metallurgique PROCESS FOR MANUFACTURING RAILS WITH IMPROVED CHARACTERISTICS

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR543461A (en) * 1921-11-11 1922-09-04 Cie Des Forges De Chatillon Process and apparatus for the heat treatment of steels and in general of all other alloys liable to quench
FR27418E (en) * 1921-11-11 1924-07-01 Cie Des Forges De Chatillon Process and apparatus for the heat treatment of steels and, in general, of all other alloys liable to quench
GB228490A (en) * 1924-02-01 1925-08-12 Compagnie Des Forges De Chatillon Commentry Et Neuves-Maisons
LU63650A1 (en) * 1970-08-04 1971-12-03
FR2281990A1 (en) * 1974-08-16 1976-03-12 Krupp Ag Huettenwerke RAIL HEAT TREATMENT PROCESS
BE854834A (en) * 1977-05-18 1977-09-16 Centre Rech Metallurgique PROCESS FOR MANUFACTURING RAILS WITH IMPROVED CHARACTERISTICS

Also Published As

Publication number Publication date
LU79669A1 (en) 1978-11-06

Similar Documents

Publication Publication Date Title
US4082577A (en) Process for the heat treatment of steel
US20160194729A1 (en) High-strength and highly fatigue-resistant steel rail and production method thereof
EP0187904A3 (en) Method of heat treating pearlitic rail steels
CN105695858B (en) Railroad frog high-carbon ultra high silicon bainitic steel and preparation method thereof
CN105238917A (en) Method for improving low-temperature fracture toughness of steel rail and obtained steel rail and application thereof
JPS5989721A (en) Improvement for rail manufacture and rail thereby
FR2391282A1 (en) High tensile railway track section made of carbon-manganese steel - subjected to controlled quenching on leaving hot rolling mill
SI9500230B (en) Heat treatment procedure and device for profiled workpiece
DE3782280D1 (en) METHOD AND DEVICE FOR PRODUCING HIGH-STRENGTH RAILS.
GB2118579A (en) Heat treatment of rails
DE2820784A1 (en) High tensile railway track section made of carbon-manganese steel - subjected to controlled quenching on leaving hot rolling mill
US5174836A (en) Interrupted normalization heat treatment process
JPS5690921A (en) Production of low temperature steel having superior toughness and hydrogen induced crack resistance characteristic
JPS62161917A (en) Manufacture of head end-heattreated rail excellent in resistance to damage and wear
SU800215A1 (en) Method of thermal treatment of rails
Starodubov Optimized Heat Treatment for 10 KhSND and 15 GYuT Low-Alloy Steels
Economopoulos Heat Treating Tubular Steel Sections
JPS6452019A (en) Production of high tensile steel having low surface hardness
GB1426547A (en) Heat treatment of steel
JP2002235150A (en) Surface damage resistant rail having uniform hardness in width direction of head part and production method therefor
Furukimi et al. Mechanical Properties of 9% Ni Steel Produced by Controlled Cooling Process.(Synopsis)
Maki et al. Steel Thermomechanical Processing
Takahashi et al. Strengthening and toughening of low-carbon high-strength steels by ausforming
Burgov et al. Mechanical Properties of Hardened 16 KhSN Steel
Fan et al. On quasi-austempering bainitic/martensitic ductile iron grinding ball

Legal Events

Date Code Title Description
ST Notification of lapse