Method of fabricating a structural member by electro slag formin

Details Method of fabricating a structural member by electro slag formin Method of fabricating a structural member by electro slag formin

1979-10-16

1982-04-27

Baldwin, Robert D.

Metal founding

Process

Shaping liquid metal against a forming surface

164515, 164 761, B22D 2702

Patent

active

043265804

ABSTRACT:
A method of fabricating a structural member such as a wicket gate for water turbines by electro slag forming comprises the steps of mounting a water-cooled metal mold on a part of a previously formed structural member, such as a stem; melting electrodes inserted in the water-cooled metal mold to form the other part of the structural member such as a vane portion of the wicket gate on the previously formed structural member. The previously formed structural member has a concave portion which is exposed in the water-cooled metal mold and the water-cooled metal mold is mounted so as to contact with the previously formed structural member at the lower portion than the top of the concave portion. The previously formed structural member is melted gradually from the central portion of the concave to the outer periphery and then such a portion as the vane portion is formed by molten metal of the electrode.

REFERENCES:
patent: 3649733 (1972-03-01), Schlinger
patent: 3715201 (1973-02-01), Schlatter
patent: 3801226 (1974-04-01), Bevan et al.
patent: 3801353 (1974-04-01), Brill-Edwards
patent: 3892271 (1975-07-01), Medovar et al.
patent: 3902823 (1975-09-01), Minato et al.
patent: 4008052 (1977-02-01), Vishnevsky et al.
"Electroslag Furnaces" by Paton, Kiew, Naukova Dumka, 1976, pp. 309-310 and pp. 306-307.

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