Methods and apparatus for making cast hollows

Details Methods and apparatus for making cast hollows Methods and apparatus for making cast hollows

B - Operations, Transporting

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D

22/49

B22D 15/02 (2006.01) B22D 23/10 (2006.01)

Patent

CA 1143125

TITLE METHODS AND APPARATUS FOR MAKING CAST HOLLOWS ABSTRACT A method and apparatus are provided for forming hollow superalloy ingots by melting a molten superalloy electrode by ESR techniques into a molten slag held in a generally cylindrical mold having an axially movable mandrel until the molten metal is adjacent the level of but not over the top of the mandrel, cooling the metal sufficiently to form supporting external and internal walls, moving the mand- rel vertically relative to the cooled metal, continuing to melt metal into said slag while moving the mandrel at a rate such that the molten metal remains at a substantially constant level adjacent the top of the mandrel and cooling the formed hollow ingot.

312427

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