GB1151609A - Heat Treatment Process for Rails - Google Patents

Heat Treatment Process for Rails

Info

Publication number
GB1151609A
GB1151609A GB48039/67A GB4803967A GB1151609A GB 1151609 A GB1151609 A GB 1151609A GB 48039/67 A GB48039/67 A GB 48039/67A GB 4803967 A GB4803967 A GB 4803967A GB 1151609 A GB1151609 A GB 1151609A
Authority
GB
United Kingdom
Prior art keywords
rail
bed
oct
heat
rails
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
Application number
GB48039/67A
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.)
USINOR SA
Original Assignee
USINOR SA
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 USINOR SA filed Critical USINOR SA
Publication of GB1151609A publication Critical patent/GB1151609A/en
Expired 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
    • 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

1,151,609. Heat-treating steel rails. USINOR. Oct.23, 1967 [Oct.24, 1966], No.48039/67. Headings C7A and C7N. 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.
GB48039/67A 1966-10-24 1967-10-23 Heat Treatment Process for Rails Expired GB1151609A (en)

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
GB1151609A true GB1151609A (en) 1969-05-14

Family

ID=8619844

Family Applications (1)

Application Number Title Priority Date Filing Date
GB48039/67A Expired GB1151609A (en) 1966-10-24 1967-10-23 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0098492A2 (en) * 1982-07-06 1984-01-18 The Algoma Steel Corporation, Limited Method for the production of railway rails by accelerated cooling in line with the production rolling mill

Families Citing this family (2)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0098492A2 (en) * 1982-07-06 1984-01-18 The Algoma Steel Corporation, Limited Method for the production of railway rails by accelerated cooling in line with the production rolling mill
EP0098492A3 (en) * 1982-07-06 1985-04-17 The Algoma Steel Corporation, Limited Method for the production of railway rails by accelerated cooling in line with the production rolling mill
US4611789A (en) * 1982-07-06 1986-09-16 The Algoma Steel Corporation Limited Apparatus for the production of improved railway rails by accelerated cooling in line with the production rolling mill

Also Published As

Publication number Publication date
LU54728A1 (en) 1968-01-26
FI46984B (en) 1973-05-02
NL6714272A (en) 1968-04-25
PL79264B1 (en) 1975-06-30
FI46984C (en) 1973-08-10
AT287039B (en) 1971-01-11
DE1583421B2 (en) 1971-04-01
OA02669A (en) 1970-12-15
FR90945E (en) 1968-03-08
BE704665A (en) 1968-02-15
DE1583421A1 (en) 1971-04-01
SE334171B (en) 1971-04-19
ES346099A1 (en) 1968-12-01

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees