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四、电子束焊接 1.概述电子束焊接是50年代末期发展起来的新技术。主要用于原子能、航空、航天、精密仪器制造等部门。近年在汽车制造、电子工业,其中包括真空电子器件制造中也逐步得到应用。电子束焊的实质是由电子枪阴极受热发射电子,经直流高压电场加速,再被静电场与磁场聚焦成束后轰击工件,释放的动能转化为热能,使金属熔化形成焊缝。电子束焊的特点是束的穿透能力极强,
Fourth, electron beam welding 1. Overview Electron beam welding is the development of the late 50’s new technology. Mainly used in atomic energy, aviation, aerospace, precision instrument manufacturing and other departments. In recent years, automobile manufacturing, electronics industry, including the manufacture of vacuum electronic devices are also gradually applied. The essence of electron beam welding is that the cathode of the electron gun emits heat and emits electrons, which is accelerated by a direct current high voltage electric field. After being focused by the electrostatic field and the magnetic field, the workpiece is bombarded and the kinetic energy released is converted into heat energy to melt the metal to form a weld. Electron beam welding is characterized by strong penetration of the beam,