Electron Beam Welding Ebw

The workpieces melt and flow together as the kinetic energy of the electrons is transformed into heat upon impact.

Electron beam welding ebw.

The kinetic energy of each electron is given by mv 2 but v that is the electron velocity is proportional to the square root of the accelerating volt age so the energy of each electron is proportional to the accelerating voltage. Electron beam welding ebw is another focused beam welding process. Around the world automobiles on the road have components that were manufactured using eb welding. Electron beam welding must occur in a vacuum because air molecules interfere with the propagation of the electron beam.

The process develops energy by bombarding the work piece with a focused beam of high velocity electrons. The power density pd defines the process s ability to develop enough heat for welding. The vacuum level makes a difference in the quality of the weld. The higher the vacuum the less amount of contamination and residual gasses will be present when the welding occurs.

Welcome to electron beam welding. The electron beam welding ebw and laser beam welding lbw processes are high energy density welding processes that offer several possible advantages including low welding heat input high weld depth to width ratio narrow heat affected zone haz and reduced distortion. Since then it has become a preferred technique for small precision parts requiring very high quality welds in low carbon steel stainless steel aluminum titanium inconel and many other exotic alloys. The pd in watts per unit area is obtained by the following equation.

To impinge on the weld joint and produce coalescence ebw utilizes a moving concentrated beam of high velocity electrons while lbw utilizes the heat from a high density coherent laser beam. Electron beam welding ebw is a fusion welding in which coalescence is produced by heating the workpiece due to impingement of the concentrated electron beam of high kinetic energy on the workpiece. Ebw is often performed under vacuum conditions to prevent dissipation of the electron beam. High power electron beam systems for welding and drilling are used in the aerospace automotive defense semiconductor medical nuclear oil gas power generationand a variety of other industries.

Today s aircraft have components that were manufactured using eb welding. Electron beam welding ebw is a method of welding in which the energy required to melt the area to be welded is provided by a focussed stream of electrons. Electron beam welding emerged as a production process in the late 1950s within the aerospace and nuclear power generation industries.