Method of maintaining temperature of salt bath during quenching

Details Method of maintaining temperature of salt bath during quenching Method of maintaining temperature of salt bath during quenching

1975-07-24

1978-01-03

Steiner, Arthur J.

Metal treatment

Compositions

Heat treating

266 44, 266112, C21C 706, G05D 2313

Patent

active

040664775

ABSTRACT:
A fluid is admitted into a bath having a certain temperature. The temperature of the fluid is different from that of the bath. The fluid travels through the bath so that heat transfer occurs between the bath and the fluid while, at the same time, the bath is thus caused to be agitated. The flow of the fluid into the bath is regulated in such a manner as to maintain the temperature of the bath within predetermined limits. A preferred application resides in the cooling of a bath, particularly one which is used for the heat treatment of steel wire which has been hot rolled immediately prior to the introduction thereof into the bath. Here, the fluid may be in the form of a gas upon being admitted into the bath. Alternatively, the fluid may be in the form of a liquid which vaporizes at the temperature of the bath. In this event, heat is removed from the bath partially in the form of the heat of vaporization of the liquid. It is also possible to feed both a gas and a liquid into the bath. In this manner, a cooling effect may be obtained which is less than that if only a vaporizable liquid were used without, however, incurring a loss in the degree of agitation of the bath.

REFERENCES:
patent: 1936719 (1933-11-01), Knerr
patent: 2023736 (1935-12-01), Lloyd
patent: 2052254 (1936-08-01), Shaver
patent: 2537830 (1951-01-01), Holden
patent: 2556349 (1951-06-01), Trautman
patent: 2931745 (1960-04-01), Halgren
patent: 3645802 (1972-02-01), Keough
patent: 3915759 (1975-10-01), Smollett et al.
"Water in Molten Salt Increases Quenching Power Lowers Operating Temperature", Case, et al., Metal Progress, Oct. 1953, pp. 122-124.

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