Patent ID: 8330071
Filing Date: 2012-12-11
Classification: B23H,C23C,F01D,F05D,Y10T

Abstract:
1. A discharging surface preparation method of surface preparing an end face portion of a metallic plate extremely narrow in width by using discharge energy, the discharging surface preparation method comprising: a recess forming step of having a compact formed from at least one of powder of metal, powder of compound of metal, and powder of ceramics, employed as an electrode, generating pulsed discharge between an end surface of the electrode and the end face portion of the metallic plate, in a liquid or gas providing an electric insulation property, for using discharge energy thereof, to attrite the electrode, to form in the end surface of the electrode a recess conforming to a shape of the end face portion of the metallic plate; an auxiliary coat forming step of having, under a condition holding a prescribed discharge gap, the electrode making a relative movement in a direction perpendicular to a lateral side of the metallic plate, generating pulsed discharge between an internal side face of the recess of the electrode and a lateral face of the end face portion of the metallic plate, in a liquid or gas providing an electric insulation property, for using discharge energy thereof, to deposit a material of the electrode or a reactant substance thereof on the lateral face of the end face portion of the metallic plate, to form an auxiliary coat; and an end coating step of, following a completion of the auxiliary coat forming step, generating pulsed discharge between a bottom face of the recess of the electrode and a top face of the end face portion of the metallic plate, in a liquid or gas providing an electric insulation property, for using discharge energy thereof, to deposit a material of the electrode or a reactant substance thereof on the top face of the end face portion of the metallic plate, to form a cladding layer.