Abstract: According to the invention, the electrode wire (1) for electric discharge machining comprises a metal core (2), in one or more layers of metal or metal alloy. On the metal core (2), a coating (3) having an alloy different from that of the metal core (2) contains more than 50 wt % zinc. The coating (3) comprises copper-zinc alloy (3a) of fractured ? phase, and covers the majority of the metal core (2). The coating (3) contains covered pores (5a, 5b, 5c, 5d, 5) larger than 2 ?m.

Abstract: According to the invention, the electrode wire (1) for electric discharge machining comprises a metal core (2), in one or more layers of metal or metal alloy. On the metal core (2), a coating (3) having an alloy different from that of the metal core (2) contains more than 50 wt % zinc. The coating (3) comprises copper-zinc alloy (3a) of fractured ? phase, and covers the majority of the metal core (2). The coating (3) contains covered pores (5a, 5b, 5c, 5d, 5e) larger than 2 ?m.

Abstract: A marked abrasive wire including, on the cylindrical outer face thereof and between abrasive particles, a mark that is deformed as a function of the twisting of the abrasive wire, this mark extending longitudinally over at least 50% of the total length of the abrasive wire and having a reflectance Rm at a wavelength ?m,—during the displacement of the wire and with the aid of a sensor sensitive to the reflectance of the outer face of the abrasive wire, the reading of at least one characteristic of the current shape of the mark that varies as a function of the twisting of the abrasive wire, and—the estimation of the twisting of the abrasive wire from the observed characteristic of the current shape of the mark and from a known value of this characteristic corresponding to a known twisting of the abrasive wire.

Abstract: The invention relates to an abrasive wire which comprises: abrasive particles (32) of which the 5% minimum diameter, denoted D5, is no lower than 5 ?m and of which the 95% maximum diameter, denoted D95, is less than 40 ?m; and a binder (34) which mechanically holds the abrasive particles on a central core, the thickness of said binder being between Tbo_min and Tbo_max, where Tbo_min and Tbo_max are provided by the following relationships Tbo_max=D5×(1?Emin/100) and Tho_min=D95×(1?Emax/100), where Emin and Emax are, respectively, greater than 50% and less than 90%. The binder (34) has a hardness of greater than 450 Hv on the Vickers scale and the number of abrasive particles (32) per millimeter of wire is less than 31 and greater than 1 over at least 1 km of the length of the wire.