Patent ID: 6929829

Claim:
A discharging surface treatment method for generating a discharge between an electrode and a treatment target so that a coating film is formed on the surface of the treatment target by the discharging energy, forming a powder mixture, comprising as one component: (a) a ferrous-family metal powder or a non-ferrous metal powder, wherein each of said metal powders can be formed of one or plural metals; and, as a second component, (b) one or a plurality of metal carbides, wherein the elemental metal of the carbide or carbides belongs to the IVB, VB or VIB families in the Periodic Table; the non-ferrous metal powder having the same composition as the treatment target; heating the powder mixture to a temperature at which said component (a) starts to melt to form an electrode that is approximately as hard as chalk and that serves as a discharge processing electrode, and electrical conditions at a time when a base member of the treatment target is directly subjected to a discharging surface treatment so as to form an initial coating film, and electrical conditions at a time when the initial coating film that has been formed on the base member is subjected to a further discharging surface treatment, are altered according to the characteristics of the treatment target material.