Electron beam welding method is used in a high vacuum tell movement of the kinetic energy of the electron beam welding.Electron beam is generated in the electron gun and heating to 1400 ~ 1650 DHS C cathode emission free electrons, by focusing on the head to electronic focus for anode 3 aperture diameter is equal to the electron beam.The voltage between the anode and the cathode can be reached tens of thousands of volts, have a big speed and electronic energy.

     Electron beam by electron lens can make its energy density increases, the magnetic field by changing the lens can also change the electron beam diameter.Electromagnetic lens at the back of the magnetic bias system used to make electron beam weld.High-speed electron beam into the weld steel pipe parts, electronic kinetic energy into heat energy to heat it.Due to the heating speed, the width of the beam is small, molten metal area is very narrow, small heat affected zone, so this method prominent advantages are high welding speed, low heat consumption and adjustment easily.If appropriate, can be obtained without burr, very smooth weld, suitable for welding of high melting materials, thin wall and thick wall steel pipe.

     Electron beam welding can in a vacuum, in the air or inert gas.Highly active materials can be welded in the vacuum, otherwise easy to oxidation.High carbon steel, alloy steel, and some difficult fusion diamond can be in the air or inert gas welding (helium and argon).