US 12,434,313 B2
Wire electrode for spark-erosion cutting and method for producing said wire electrode
Tobias Nöthe, Herborn (DE); Bernd Barthel, Steffenberg (DE); and Stefan Rink, Herborn (DE)
Assigned to BERKENHOFF GMBH, Heuchelheim (DE)
Appl. No. 17/595,148
Filed by Berkenhoff GmbH, Heuchelheim (DE)
PCT Filed May 8, 2020, PCT No. PCT/EP2020/062930
§ 371(c)(1), (2) Date Nov. 10, 2021,
PCT Pub. No. WO2020/229365, PCT Pub. Date Nov. 19, 2020.
Claims priority of application No. 19173932 (EP), filed on May 10, 2019; and application No. 20151302 (EP), filed on Jan. 10, 2020.
Prior Publication US 2022/0212277 A1, Jul. 7, 2022
Int. Cl. B23H 7/08 (2006.01); C22C 9/04 (2006.01); C22F 1/08 (2006.01)
CPC B23H 7/08 (2013.01) [C22C 9/04 (2013.01); C22F 1/08 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A wire electrode for spark-erosion cutting having
a core comprising a material that contains a metal or a metal alloy, and
a covering, surrounding the core, the covering comprising one or more covering layers,
wherein the one or more covering layers comprises a covering layer material that has regions having a morphology that corresponds to block-like particles,
wherein the block-like particles are spatially separated, at least over a portion of the circumference of the block-like particles, from each other, from the covering layer material, or the core material by cracks,
wherein, when viewed in a wire cross section perpendicular or parallel to the wire longitudinal axis, more than 50% of the area of a region with the morphology of a block-like particle contains a copper-zinc alloy with a zinc concentration of from 38 to 49 wt.-%.