GB1518100A - Annealing process - Google Patents

Annealing process

Info

Publication number
GB1518100A
GB1518100A GB4719874A GB4719874A GB1518100A GB 1518100 A GB1518100 A GB 1518100A GB 4719874 A GB4719874 A GB 4719874A GB 4719874 A GB4719874 A GB 4719874A GB 1518100 A GB1518100 A GB 1518100A
Authority
GB
United Kingdom
Prior art keywords
heat exchanger
annealing
hot
gases
cold gases
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
GB4719874A
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.)
British Steel Corp
Original Assignee
British Steel 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 British Steel Corp filed Critical British Steel Corp
Priority to GB4719874A priority Critical patent/GB1518100A/en
Publication of GB1518100A publication Critical patent/GB1518100A/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
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/663—Bell-type furnaces
    • 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
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof

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 Strip Materials And Filament Materials (AREA)

Abstract

1518100 Coil annealing BRITISH STEEL CORP 31 Oct 1975 [31 Oct 1974] 47198/74 Heading C7N In a method of annealing metal articles, particularly coils of steel strip, a protective, usually reducing gas is circulated inside a furnace cover around the articles to be annealed and through one side of a rotary heat exchanger, hot gases being passed through the other side of the heat exchanger, followed by cold gases to cool the protective gas. The hot and cold gases may be air. In carrying out an annealing the coils 12 of sheet steel are stacked on a pedestal 72 in well 16. Annealing furnace 10 is lowered and sealed at its periphery 14. Reducing gas is admitted to furnace 10 through inlet 18, and leaves through outlet 20. Circulation, powered by fan 24, is then through one side 44, 40 of rotary heat exchanger 22, in which the refractory or metallic matrix disc 30 with a plurality of honeycomb passages 32 is continuously driven by a central rotor and driveshaft 36. Hot gases from generator 26, or cold gases from inlet 28 are admitted countercurrently to the other side, 38, 42 of the heat exchanger to heat or cool the reducing gas circulating in the closed circuit. A flexible seal 46 extends between the gas ducts 38, 40 and 42, 44, seating on the face 34, Fig. 4 (not shown) of the matrix disc 30 to prevent contamination of the reducing and hot or cold gases.
GB4719874A 1975-10-31 1975-10-31 Annealing process Expired GB1518100A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4719874A GB1518100A (en) 1975-10-31 1975-10-31 Annealing process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4719874A GB1518100A (en) 1975-10-31 1975-10-31 Annealing process

Publications (1)

Publication Number Publication Date
GB1518100A true GB1518100A (en) 1978-07-19

Family

ID=10444101

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4719874A Expired GB1518100A (en) 1975-10-31 1975-10-31 Annealing process

Country Status (1)

Country Link
GB (1) GB1518100A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140333015A1 (en) * 2011-12-14 2014-11-13 Ebner Industrieofenbau Gmbh Bell-type furnace with a heat dispensing device positioned within a protective hood, in particular fed by an energy source external to the furnace chamber, for dispensing heat to annealing gas
US20140374969A1 (en) * 2011-12-14 2014-12-25 Ebner Industrieofenbau Gmbh Closed transport fluid system for furnace-internal heat exchange between annealing gases

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140333015A1 (en) * 2011-12-14 2014-11-13 Ebner Industrieofenbau Gmbh Bell-type furnace with a heat dispensing device positioned within a protective hood, in particular fed by an energy source external to the furnace chamber, for dispensing heat to annealing gas
US20140374969A1 (en) * 2011-12-14 2014-12-25 Ebner Industrieofenbau Gmbh Closed transport fluid system for furnace-internal heat exchange between annealing gases
US9528166B2 (en) * 2011-12-14 2016-12-27 Ebner Industrieofenbau Gmbh Closed transport fluid system for furnace-internal heat exchange between annealing gases

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee