Method to control the deformations of the sidewalls of a crystal

Details Method to control the deformations of the sidewalls of a crystal Method to control the deformations of the sidewalls of a crystal

1995-06-06

1998-06-09

Batten, Jr., J. Reed

Metal founding

Process

Shaping liquid metal against a forming surface

164443, B22D 1104

Patent

active

057621276

ABSTRACT:
Crystalliser and method to control the deformations of the sidewalls of a crystalliser (11) for the continuous casting of billets/blooms/slabs (24), which is associated with a mould (10) and cooperates externally with a box-shaped structure (13) creating a cooling chamber (14), in which a cooling fluid circulates, and cooperates internally with the skin of the billets/blooms/slabs (24) being formed, the cooling chamber (14) containing an intermediate wall (20) creating a circulation channel (21) in cooperation with the outer surface of the sidewall (12) of the crystalliser (11), at least one upper zone (37) being included in cooperation at least with the vicinity of the meniscus and with the portion below the meniscus (27) of liquid metal, a lower zone (38) being also included and beginning in the vicinity of the zone of separation of the forming skin from the inner surface of the sidewall (12) of the crystalliser (11) and extending towards the outlet of the crystalliser (11), the pressure of the cooling fluid in the lower zone (38) of the crystalliser (11) being a function of the desired value (g1) of an air interspace (36) between the sidewall (12) of the crystalliser (11) and the skin of the forming billet/bloom/slab (24), this desired value of air interspace (36) tending towards a zero value.

REFERENCES:
patent: 3520352 (1970-07-01), Hess
patent: 3667534 (1972-06-01), Kanobogi et al.
patent: 3886991 (1975-06-01), Meier et al.
patent: 3933192 (1976-01-01), Rodenchuk et al.
patent: 4690200 (1987-09-01), Okamoto
patent: 5095970 (1992-03-01), Klein et al.
Metallurgical Transactions B., vol. 13B Mar. 1982, pp. 91-104 Samarasekera et al "Thermal Distortion of Continuous-Casting Billet Molds".
Patent Abstracts of Japan, vol. 8, No. 136 Jun. 23, 1984 & JP A 59-035856 (Kawasaki Seitetsu KK) Feb. 27, 1984.

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