Electron Beam Machining (EBM)

Process Definition & Working Principle

Electron Beam Machining (EBM) is an advanced high-energy thermal material removal process that utilizes a tightly focused beam of high-velocity, high-density electrons. The process operates by converting the kinetic energy of accelerated electrons into localized thermal energy upon impact with the workpiece surface. The power density at the focal spot reaches extreme values between $10^7\text{ and }10^9{\text{ W/cm}}^2$. This concentrated energy delivery induces instantaneous local heating, melting, and sublimation (direct vaporization) of the material without a prolonged liquid phase. This physical mechanism limits heat dissipation to adjacent regions through conduction, enabling the achievement of an extremely narrow Heat-Affected Zone (HAZ).