GB1027186A - Thermal hardening of rails - Google Patents

Thermal hardening of rails

Info

Publication number
GB1027186A
GB1027186A GB48209/64A GB4820964A GB1027186A GB 1027186 A GB1027186 A GB 1027186A GB 48209/64 A GB48209/64 A GB 48209/64A GB 4820964 A GB4820964 A GB 4820964A GB 1027186 A GB1027186 A GB 1027186A
Authority
GB
United Kingdom
Prior art keywords
rails
strings
quenching
thermal hardening
zone
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
GB48209/64A
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.)
Union Carbide Corp
Original Assignee
Union Carbide Corp
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 Union Carbide Corp filed Critical Union Carbide Corp
Publication of GB1027186A publication Critical patent/GB1027186A/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
    • 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
    • C21D9/06—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rails with diminished tendency to become wavy
    • 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

Abstract

Steel rails are caused to traverse a zone wherein the head is heated and are simultaneously cambered by an amount sufficient to equalize the thermal contraction resulting from the subsequent quenching. Cambering may be effected by the weight of the rail on either side of the heating zone in conjunction with an upwardly acting camber roll. Rails may be joined into strings before heat treatment and a number of strings may be treated in parallel, the joints being staggered. The rate of quenching is such that martensite formation is avoided. Suitable apparatus is described and illustrated.
GB48209/64A 1963-11-29 1964-11-27 Thermal hardening of rails Expired GB1027186A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US326722A US3266956A (en) 1963-11-29 1963-11-29 Thermal hardening of rails

Publications (1)

Publication Number Publication Date
GB1027186A true GB1027186A (en) 1966-04-27

Family

ID=23273412

Family Applications (1)

Application Number Title Priority Date Filing Date
GB48209/64A Expired GB1027186A (en) 1963-11-29 1964-11-27 Thermal hardening of rails

Country Status (2)

Country Link
US (1) US3266956A (en)
GB (1) GB1027186A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3497403A (en) * 1963-10-30 1970-02-24 Abex Corp Surface hardening of rails
US3556499A (en) * 1964-03-27 1971-01-19 Chemetron Corp Hardened steel members and method and apparatus for making the same
DE1241685B (en) * 1965-04-06 1967-06-01 Elektro Thermit Gmbh Process for thermal post-treatment of the seams welded rails on the front
GB1596049A (en) * 1977-07-07 1981-08-19 Canron Corp Hardening of steel rails without distortion
CA1193176A (en) * 1982-07-06 1985-09-10 Robert J. Ackert Method for the production of improved railway rails by accelerated colling in line with the production rolling mill
US4486248A (en) * 1982-08-05 1984-12-04 The Algoma Steel Corporation Limited Method for the production of improved railway rails by accelerated cooling in line with the production rolling mill
FR3086677B1 (en) * 2018-10-02 2020-10-30 Matisa Materiel Ind Sa PROCESS FOR IMMOBILIZING A RAILWAY RAIL WITH THERMAL CONDITIONING OF A PORTION OF RAIL, AND ASSOCIATED RAILWAY MACHINE

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124492A (en) * 1964-03-10 Method for heat-treating rails
US2049830A (en) * 1932-10-27 1936-08-04 Oil Well Supply Co Process of straightening and testing long metal articles
US2254307A (en) * 1939-03-18 1941-09-02 Nat Cylinder Gas Co Flame hardening
US2570883A (en) * 1944-01-05 1951-10-09 Stivin Jiri Elimination of deformation during surface hardening
US3193270A (en) * 1962-10-12 1965-07-06 United States Steel Corp Apparatus for heat-treating rails

Also Published As

Publication number Publication date
US3266956A (en) 1966-08-16

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