![]() Medium-vacuum welding – welding done in separate chamber with partial vacuum- Vacuum pump-down time reduced. High-vacuum welding – welding done in same vacuum chamber as beam generation. Pumpdown time can take as long as an hour. When first developed, EBW had to be carried out in vacuum chamber to minimize disruption of electron beam by air molecules. Power in EBW not exceptional, but power density is. Beam currents are low (measured in milliamps). Electron beam gun operates at: High voltage (e.g., 10 to 150 kV typical) to accelerate electrons. Thermit welding.įusion welding process in which heat for welding is provided by a highly‑focused, high‑intensity stream of electrons striking work surface. Processes include: Electron beam welding. Use unique technologies to develop heat for melting. FW processes that cannot be classified as arc, resistance, or oxyfuel welding. ![]()
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