Method and apparatus for manufacturing composite steel ingot
AssigneeHitachi, Ltd.
InventorsHideyo Kodama, Yasuo Kondo, Kimihiko Akahori
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Abstract
This invention is in a method of manufacturing a composite steel ingot wherein a consumable electrode is inserted into an empty space positioned concentrically with said steel ingot, and electric power is fed to said consumable electrode to effect electroslag remelting under a slag bath and then to solidify the molten metal, while taking out an electric current through a plurality of collecting electrodes which are electrically connected to said steel ingot placed on a surface plate, the improvement in that a flow path of the electric current passing from said consumable electrode to said collecting electrodes is moved in the circumferential direction of said steel ingot during said electroslag remelting.
Claims23
A method of manufacturing a composite steel ingot comprising locating a steel ingot having an empty space positioned concentrically therein on a surface plate, having a plurality of collecting electrodes electrically connected thereto in spaced relation, inserting a consumable electrode into the empty space of said steel ingot, feeding electric power to said comsumable electrode to effect electroslag remelting under a slag bath, and then solidifying the molten metal while taking out an electric current through said plurality of collecting electrodes which are electrically connected to said steel ingot placed on the surface plate, wherein a flow path of the electric current passing from said consumable electrode to said collecting electrodes is moved in the circumferential direction of said steel ingot during said electroslag remelting.
A method of manufacturing a composite steel ingot comprising inserting a consumable electrode into an empty space of a steel ingot, said empty space being positioned concentrically with said steel ingot, and feeding electric power to said consumable electrode to effect eletroslag remelting under a slag bath, while taking out an electric current through a plurality of collecting electrodes which are electrically connected to said steel ingot, wherein said slag bath is rotated in the circumferential direction and a flow path of the electric current passing from said consumable electrode to said collecting electrodes is moved in the circumferential direction of said steel ingot during said electroslag remelting.
A method of manufacturing a composite steel ingot comprising inserting a consumable electrode into an empty space of a steel ingot, said space being positioned concentrically with said steel ingot;
- feeding electric power to said consumable electrode to effect electroslag remelting under a slag bath, while taking out an electric current through a plurality of collecting electrodes which are electrically connected to said steel ingot, wherein a flow path of the electric current passing from said consumable electrode to said collecting electrodes is moved in the circumferential direction of said steel ingot during said electroslag remelting, and wherein said slag bath is rotated in the circumferential direction during electroslag remelting with the rotational speed of said slag bath being increased with a rise in the surface of said slag bath.
Dependencies are inferred from the claim text.