GB1415937A - Treatment of annular charges - Google Patents

Treatment of annular charges

Info

Publication number
GB1415937A
GB1415937A GB868973A GB868973A GB1415937A GB 1415937 A GB1415937 A GB 1415937A GB 868973 A GB868973 A GB 868973A GB 868973 A GB868973 A GB 868973A GB 1415937 A GB1415937 A GB 1415937A
Authority
GB
United Kingdom
Prior art keywords
charge
chamber
feb
groups
gas
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
GB868973A
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.)
UGINE INFRA TREATMENT OF ANNUL
Original Assignee
UGINE INFRA TREATMENT OF ANNUL
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 UGINE INFRA TREATMENT OF ANNUL filed Critical UGINE INFRA TREATMENT OF ANNUL
Publication of GB1415937A publication Critical patent/GB1415937A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/16—Arrangements of air or gas supply devices
    • 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
    • C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D11/00—Arrangement of elements for electric heating in or on furnaces
    • F27D11/02—Ohmic resistance heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B2005/062—Cooling elements
    • F27B2005/064—Cooling elements disposed in the furnace, around the chamber, e.g. coils
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/14—Arrangements of heating devices
    • F27B2005/143—Heating rods disposed in the chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/16—Arrangements of air or gas supply devices
    • F27B2005/161—Gas inflow or outflow
    • F27B2005/162—Gas inflow or outflow through closable or non-closable openings of the chamber walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/16—Arrangements of air or gas supply devices
    • F27B2005/166—Means to circulate the atmosphere
    • F27B2005/167—Means to circulate the atmosphere the atmosphere being recirculated through the treatment chamber by a turbine

Abstract

1415937 Vacuum furnaces UGINE INFRA 22 Feb 1973 [23 Feb 1972] 8689/73 Heading F4B A vacuum furnace for heating an annular charge 5 comprises a fluid-tight chamber 1, means for evacuating the chamber, means for introducing and circulating a gas in the chamber and two groups of cylindrically arranged electrical heating elements, one inside and one outside the charge, the supply to the two groups being independently controllable so that the temperature inside and outside the charge may be adjusted to be the same. The heating elements 4, 6 may be resistors or susceptors heated by induction from coils from which they are thermally insulated. When the heat treatment is complete the charge may be cooled by a gas which is circulated by a fan 9 through the heating zone inside shield 3 and over cooling coil 2. Cover 10 is removed during this operation.
GB868973A 1972-02-23 1973-02-22 Treatment of annular charges Expired GB1415937A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7206040A FR2173406A5 (en) 1972-02-23 1972-02-23

Publications (1)

Publication Number Publication Date
GB1415937A true GB1415937A (en) 1975-12-03

Family

ID=9093967

Family Applications (1)

Application Number Title Priority Date Filing Date
GB868973A Expired GB1415937A (en) 1972-02-23 1973-02-22 Treatment of annular charges

Country Status (5)

Country Link
BE (1) BE795779A (en)
CH (1) CH561497A5 (en)
DE (1) DE2308465A1 (en)
FR (1) FR2173406A5 (en)
GB (1) GB1415937A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102534168A (en) * 2011-12-30 2012-07-04 华侨大学 Heating method and heating device for preparing brazing diamond fretsaw

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3910234C1 (en) * 1989-03-30 1990-04-12 Degussa Ag, 6000 Frankfurt, De

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102534168A (en) * 2011-12-30 2012-07-04 华侨大学 Heating method and heating device for preparing brazing diamond fretsaw

Also Published As

Publication number Publication date
CH561497A5 (en) 1975-04-30
BE795779A (en) 1973-08-22
FR2173406A5 (en) 1973-10-05
DE2308465A1 (en) 1973-08-30

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Legal Events

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