High-bandwidth continuous-flow arc furnace

Patent · Sun Dec 31 23:00:00 EST 1995

OSTI ID:870548

Hardt, David E ^[1]; Lee, Steven G ^[2]

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1. Concord, MA
2. Ann Arbor, MI

A high-bandwidth continuous-flow arc furnace for stream welding applications includes a metal mass contained in a crucible having an orifice. A power source charges an electrode for generating an arc between the electrode and the mass. The arc heats the metal mass to a molten state. A pressurized gas source propels the molten metal mass through the crucible orifice in a continuous stream. As the metal is ejected, a metal feeder replenishes the molten metal bath. A control system regulates the electrode current, shielding gas pressure, and metal source to provide a continuous flow of molten metal at the crucible orifice. Independent control over the electrode current and shield gas pressure decouples the metal flow temperature and the molten metal flow rate, improving control over resultant weld characteristics.

• Research Organization: Massachusetts Institute of Technology (Cambridge, MA)
• DOE Contract Number: FG02-85ER13331
• Assignee: Massachusetts Institute of Technology (Cambridge, MA)
• Patent Number(s): US 5544195
• OSTI ID: 870548
• Country of Publication: United States
• Language: English

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electrode
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feeder
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