Glow Discharge Electron Beam Welding

The high voltage, low pressure glow discharge is an efficient source of high energy electrons. Recent advances in the subject indicate the great scope it offers as a flexible means for delivering heat to a workpiece in a controlled manner. A wide range of beam shapes can be designed and electron beam welding at roughing pump pressures by these techniques looks promising. We describe our welding experience with point focus beams at power levels up to about 1 kW and with line and ring focus beams up to about 3 kW. Conduction limited welds were made in various metals by both conventional traversing of the workpiece and by single shot stationary application.