Patent ID: 7892410
Filing Date: 2011-02-22
Classification: C23C

Abstract:
1. A discharge surface treatment method for generating a pulse-like discharge between an electrode and a workpiece, using a green compact formed by compressing any one of a metal powder, a metal compound powder, and a ceramics powder as the electrode, and forming a coating consisting either one of a material for the electrode and a material obtained from a reaction of the material for the electrode by a discharge energy of the pulse-like discharge on a surface of the workpiece, the discharge surface treatment method comprising: detecting a voltage between the electrode and the workpiece during a discharge; and determining a state of the discharge surface treatment based on a result of the detecting, wherein the determining comprises determining that the state of the discharge surface treatment is abnormal if a drop of the voltage is detected at the detecting, and wherein the voltage drop is a small, predetermined percentage lower than the voltage between the electrode and the workpiece during the discharge when the discharge surface treatment is normal.