The Paper presents the processes of corrosion,bubble movement and vaporization of metals in WEDM by using high speed photography, and also describes the process of electric discharge in WEDM.

• 应用高速摄影技术研究电火花线切割加工（WEDM）放电、热蚀、气泡运动和金属材料的抛出过程，并对线切割加工放电的过程进行了描述。