Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1997-01-27
1998-12-08
Sheehan, John
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
428576, 428662, B23K 3500
Patent
active
058462872
ABSTRACT:
A method for forming a wrought product from a starting metal such as tantalum, niobium, and alloys thereof. A consumable electrode is coated with at least a first alloy layer by means which provide for uniform thickness. Sufficient power is applied to the electrode body to induce arcing to cause the starting metal and alloy layers to melt and pool in a crucible. The uniform layer on the electrode body provides a means for delivering minute quantities of alloy into a larger quantity of starting metal and facilitates a uniform and consistent arc which promotes mixing of the alloy and starting material in the crucible. The electrode body is consumed at an improved rate without an associated decrease in the final ingot yield weight. The pooled metal is allowed to solidify into an ingot. The ingot is then formed into a wrought product.
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Engleman Robert
Heatley Charles
Huber Louis
Kumar Prabhat
Cabot Corporation
Sheehan John
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