Patent ID: 7834291

Claim:
An electrode for electric discharge surface treatment, the electrode being a green compact formed by molding a metal powder, a metal compound powder, or a ceramic powder, and used for electric discharge surface treatment in which an electric discharge is generated between the electrode and a work in dielectric fluid or air to form by the electric discharge energy on a surface of the work a coat of a material of the electrode or of a substance resulting from reaction of the material due to the electric discharge energy, wherein the material of the electrode includes a first material which will remain substantially uncarbonized and a second material to be substantially melted, and a particle diameter of the first material which will remain substantially uncarbonized is larger than a particle diameter of the second material to be substantially melted, so as to prevent a carbonization of the first material, leaving the first material deposited as it is on the work for coating, and to obtain a lubrication property when the first material is oxidized under a high-temperature environment, wherein the first material not desired to be carbonized includes at least one of Cr, Mo, and an alloy including any one of Cr and Mo.