ELECTRODE FOR DISCHARGE SURFACE TREATMENT, DISCHARGE SURFACETREATMENT METHOD AND DISCHARGE SURFACE TREATMENT APPARATUS

摘要

An electrode (202) for discharge surface treatment is disclosed which is use d in a discharge surface treatment wherein a compact body formed by compressin g a metal powder, a metal compound powder or a ceramic powder is used as an electrode (201) and a discharge is generated between the electrode (201) and a workpiece (202) in a process liquid (205) or in the air for forming a coatin g film over the surface of the workpiece (202) with the energy of discharge. T he coating film is composed of an electrode material or a material with which t he electrode material is reacted by the discharge energy. In the electrode (202 ) for discharge surface treatment, the diameter of a material powder which is not desired to fuse is formed larger than that of another material powder which is desired to fuse.