SURFACE TREATMENT METHOD BY DISCHARGE, AND ELECTRODE FOR SURFACE TREATMENT BY DISCHARGE

摘要

PROBLEM TO BE SOLVED: To establish a technology for forming a dense film with high strength through surface treatment by discharge. SOLUTION: The surface treatment method by discharge is directed at forming the film comprising an electrode material or a material formed of a reacted electrode material by discharge energy on the surface of a workpiece, by using an electrode of a powder compact prepared by compacting a powder of a metal or a metallic compound, generating electric discharge in a pulse form between the electrode and the workpiece in a working liquid or gas, and using the energy. The method comprises the steps of: detecting a ratio of immediate discharge generated between the electrode and the workpiece; and changing a working condition when the above step shows that the ratio of the immediate discharge becomes higher than a predetermined ratio. COPYRIGHT: (C)2006,JPO&NCIPI