To prevent pollution of a molten substance due to collapse of an ingot shelf at vacuum arc melting (aVAR process = Vacuum Arc Remelting).
The VAR device includes a furnace chamber 14, a consumption electrode 12 formed of a material remelting in a furnace chamber, and a crucible 16 in a furnace chamber. The crucible is provided with a wall to form a container for collecting a molten substance from a consuming electrode. At lest a part of a wall is texture-processed to provide an area to mechanically stabilize a shelf as the lower side of the shelf is molten and the upper side of the shelf is formed. In a VAR process, since a material is molten from the tip of the consuming electrode, a DC current is excited between the electrode and the bottom of the crucible, and charging in a furnace chamber is effected on a cooling crucible having texture-processing wall, to form a container to collect a molten substance from the consuming electrode. The molten substance is formed adjacently to a part where texture processing of the crucible is effected in prior to the lower boundary of a solidifying material.
HENRY MICHAEL FRANCIS
WILLIAM THOMAS CARTER JR
BEWLAY BERNARD PATRICK
