Vacuum furnace with movable hot zone

Details Vacuum furnace with movable hot zone Vacuum furnace with movable hot zone

1994-08-23

1996-06-04

Hoang, Tu

Industrial electric heating furnaces

Resistance furnace device

With internal atmosphere control

373111, 266250, 219400, 432121, F27D 706

Patent

active

055240208

ABSTRACT:
A high temperature vacuum heat treating furnace has a hot zone, including heating elements and thermal insulation, which is movable between a heating location at least partly surrounding a load space and a cooling location remote from the load space. A cooling gas plenum around the hot zone in the heating location can eject cooling gas toward a load in the load space after the hot zone is retracted. Cooling rates approximately comparable to a furnace operable at four bar pressure can thereby be obtained in a furnace rated for no more than two bar internal pressure.

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patent: 5267257 (1993-11-01), Jhawar et al.
M. Kalbfleisch, "Fours de brasage et de traitment thermique sous vide", p. 87, left column; FIG. 1, Mar. 1972, Vide, Les Couches Minces, No. 158.
F. Limque et al., "Erfahrungen mit Uberdruck-Gasabschrecken sowie Aufkohlen in Vakuumbfen", May 1980, pp. 238-244, Haerterei Technische Mitteilungen, vol. 35, No. 5, Munchen DE.

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