GB640742A - Improvements in or relating to apparatus for the heat treatment of metal and other articles - Google Patents

Improvements in or relating to apparatus for the heat treatment of metal and other articles

Info

Publication number
GB640742A
GB640742A GB657848A GB657848A GB640742A GB 640742 A GB640742 A GB 640742A GB 657848 A GB657848 A GB 657848A GB 657848 A GB657848 A GB 657848A GB 640742 A GB640742 A GB 640742A
Authority
GB
United Kingdom
Prior art keywords
hearth
articles
gas
furnace
fan
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
GB657848A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB657848A priority Critical patent/GB640742A/en
Publication of GB640742A publication Critical patent/GB640742A/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
    • C21D9/0062—Heat-treating apparatus with a cooling or quenching zone

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)
  • Furnace Details (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

640,742. Furnaces for the heat-treatment of metals &c. GENERAL ELECTRIC CO., .Ltd., DOVEY, D. M., and EVANS, C. J. March 2, 1948, No. 6578. [Class 51(ii)]. Apparatus for the heat-treatment of metal or other articles in a gas atmosphere comprises a hearth having a gas-circulating fan mounted centrally thereon and extending upwardly therefrom, the arrangement being such that articles to be treated may be stacked on the hearth around the fan so that gas may flow therethrough, a furnace for heating the articles on the hearth, the hearth and furnace being movable relatively to each other so that the hearth may be disposed in or removed from a heating zone of the furnace, and a chamber or cover for receiving or enclosing the hearth and articles, within or under which the articles may be, arranged or allowed to cool after heat-treatment. The apparatus shown comprises two circular hearths 1 and 2 mounted over a pit 3 having an access cover 4 each hearth being formed with annular channels 5 housing electric heating elements 6 and covered by a steel plate 7. Mounted centrally in each hearth is a centrifugal fan 8 for circulating decarburizing gas supplied through the hearth beneath a removable cover 14 or 15 adapted to fit into a sand seal 16, the gas being sucked downwardly and delivered radially beneath guide vanes 12 through articles 13 stacked around the fan. The covers may be provided with vents for. the escape of excess gas. A single bell type electric furnace 17 fitted with a lifting lug 18 is provided for cooperation with either hearth.
GB657848A 1948-03-02 1948-03-02 Improvements in or relating to apparatus for the heat treatment of metal and other articles Expired GB640742A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB657848A GB640742A (en) 1948-03-02 1948-03-02 Improvements in or relating to apparatus for the heat treatment of metal and other articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB657848A GB640742A (en) 1948-03-02 1948-03-02 Improvements in or relating to apparatus for the heat treatment of metal and other articles

Publications (1)

Publication Number Publication Date
GB640742A true GB640742A (en) 1950-07-26

Family

ID=9817042

Family Applications (1)

Application Number Title Priority Date Filing Date
GB657848A Expired GB640742A (en) 1948-03-02 1948-03-02 Improvements in or relating to apparatus for the heat treatment of metal and other articles

Country Status (1)

Country Link
GB (1) GB640742A (en)

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