Apparatus for the zone-annealing of a workpiece consisting of a

Details Apparatus for the zone-annealing of a workpiece consisting of a Apparatus for the zone-annealing of a workpiece consisting of a

1984-10-24

1986-04-22

Brody, Christopher W.

Metallurgical apparatus

With control means responsive to sensed condition

With means supplying a treating agent

266120, 266131, 266132, 266259, C21D 900

Patent

active

045837201

ABSTRACT:
An apparatus and a process for the zone-annealing of a workpiece (1) consisting of a high-temperature material, in which the workpiece (1) is hung on a suspension device (2) actuated via a roller (3) driven by a drive motor (4) and is provided with a plate-shaped covering screen (10) having an orifice. For the dipping of the workpiece (1), there is underneath the latter a salt bath (5) which is enclosed in an insulating vessel (6) and is provided with a heating system (7) with centrally symmetrical guide plates (8) and which is closed off at the top by means of a floating insulating cover (9). The cooling of the part of the workpiece (1) which is not immersed is guaranteed by a cooling body (11) through which cooling air (14) flows and which has a central passage (12) and, at the lower end of the passage (12), a projecting edge (13) serving as a stop for the covering screen (10). The intended grain structure can be adjusted when the feed speed of the workpiece (1) is varied in portions by means of a drive motor (4) and the amount of cooling air (14). The lateral heat flux is reduced by means of jacket-like heat-insulating cladding of the workpiece (1).

REFERENCES:
patent: 2116069 (1938-05-01), Hoffman et al.
patent: 2182364 (1939-12-01), Smith
patent: 2396850 (1946-03-01), Hughes
patent: 3385583 (1968-05-01), Jablonski

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