GB1141973A - Hearth for a heat treating furnace - Google Patents

Hearth for a heat treating furnace

Info

Publication number
GB1141973A
GB1141973A GB47095/67A GB4709567A GB1141973A GB 1141973 A GB1141973 A GB 1141973A GB 47095/67 A GB47095/67 A GB 47095/67A GB 4709567 A GB4709567 A GB 4709567A GB 1141973 A GB1141973 A GB 1141973A
Authority
GB
United Kingdom
Prior art keywords
bars
hearth
posts
ceramic
graphite
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
GB47095/67A
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.)
Ikon Office Solutions Inc
Original Assignee
Ikon Office Solutions Inc
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 Ikon Office Solutions Inc filed Critical Ikon Office Solutions Inc
Publication of GB1141973A publication Critical patent/GB1141973A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
    • B01J3/04—Pressure vessels, e.g. autoclaves
    • 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
    • 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
    • F27B5/04—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated adapted for treating the charge in vacuum or special atmosphere

Abstract

1,141,973. Vacuum furnaces. ALCO STANDARD CORP. 16 Oct., 1967 [18 Jan., 1967], No. 47095/67. Heading F4B. A vacuum furnace 10 is provided with elongated hearth bars 23 of graphite, tungsten or molybdenum for supporting workpieces 20, each bar being provided with a ceramic cap 24 to prevent diffusion between it and the workpieces. The caps may be in the form of segmented tubular rollers disposed in a longitudinal slot in the hearth bar, which is supported at its ends in the furnace side walls 15, and also by graphite posts 26 extending up from the furnace bottom 14. A casing 29 containing ceramic material prevents heat losses through the ends of the hearth bars, a foamed zirconia wafer (36, Fig. 2, not shown), likewise preventing heat loss through the posts 26 on which the bars 23 detachably rest. In a modification (Figs. 6 to 8, not shown), the hearth bars are supported solely by the posts, which may be provided with ceramic jackets and rest on adjustment screws to allow for levelling of the bars. In this embodiment the ceramic caps are in the form of U- shaped segmental blocks telescoped over the bars and separated from them by a layer of graphite felt.
GB47095/67A 1967-01-18 1967-10-16 Hearth for a heat treating furnace Expired GB1141973A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US61006367A 1967-01-18 1967-01-18

Publications (1)

Publication Number Publication Date
GB1141973A true GB1141973A (en) 1969-02-05

Family

ID=24443483

Family Applications (1)

Application Number Title Priority Date Filing Date
GB47095/67A Expired GB1141973A (en) 1967-01-18 1967-10-16 Hearth for a heat treating furnace

Country Status (3)

Country Link
US (1) US3421747A (en)
DE (2) DE1984142U (en)
GB (1) GB1141973A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4604056A (en) * 1985-03-01 1986-08-05 Jones William R Vacuum furnace system hearth

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US799744A (en) * 1903-04-29 1905-09-19 Philip Alexander Mackay Refractory receptacle.
US852000A (en) * 1905-02-27 1907-04-30 Deere & Co Furnace-rail.
US1037665A (en) * 1911-09-16 1912-09-03 Walter S Rockwell Furnace for annealing, &c.
US1649926A (en) * 1926-01-11 1927-11-22 Holcroft And Company Conveyer
US2105838A (en) * 1937-01-21 1938-01-18 Gen Alloys Company Rail wearing surface
US2492220A (en) * 1945-07-16 1949-12-27 Cook Electric Co Heat-treating furnace
US2837326A (en) * 1953-12-01 1958-06-03 Gen Electric Charge supporting means for furnaces

Also Published As

Publication number Publication date
US3421747A (en) 1969-01-14
DE1984142U (en) 1968-04-25
DE1583335A1 (en) 1970-08-06
DE1583335B2 (en) 1974-10-31
DE1583335C3 (en) 1975-06-26

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