Abstract: The invention relates to a wire electrode for spark-erosion cutting, comprising a core (2), which has a metal or a metal alloy, and a sheath (3, 4, 6), which surrounds the core (2) and comprises one or more sheath layers (3, 4, 6), one of which comprises regions (3) having a morphology corresponding to block-like particles, which are spatially separated, at least over part of their periphery, from one another, from the material of the layer comprising said regions, from the material of one or more other layers and/or from the core material by cracks, characterized in that, in a wire cross-section, viewed perpendicularly or parallel to the wire longitudinal axis, more than 50% of the surface area of a region having the morphology of a block-like particle has a copper-zinc alloy with a zinc concentration of 38 to 49 wt. %. There is optionally a thin cover layer on the block-like particles, which cover layer consists of more than 50 wt. % zinc oxide with a thickness of 0.05 to 2 ?m.

Abstract: The invention relates to a wire electrode for spark-erosion cutting. The wire electrode comprises a core made of more than 50% by weight pure crystalline aluminum and/or one or more crystalline aluminum alloys, and comprises a coating layer encompassing the core and comprising copper, zinc, and/or a copper-zinc alloy. The proportion of the surface area of the core relative to the total cross-sectional area of the wire electrode is in the range from 60% to 95% along the entire length of the wire electrode.

Abstract: A wire electrode for cutting by electrical discharge machining may include a core and a covering. The core may include a metal or a metal alloy. The covering may surround the core and may include one or more covering layers, of which at least one contains a mixture of phases including at least one of ? or ?? brass and including ? brass. In the at least one covering layer that contains the mixture, the phases are present next to one another in a fine-grained microstructure having a mean grain size of 5 ?m or less in section perpendicular to the longitudinal axis of the wire electrode.

Abstract: The invention relates to a wire electrode (1, 1?) for electric discharge cutting processes and a method for the production thereof. The wire electrode (1, 1?) has a core (2) containing a metal or a metal alloy, and a coating (3, 4; 3, 4, 5) that surrounds the core (2) and includes one or more coating layers (3, 4, 5), at least one (3) of which contains a phase mixture of ?-brass and/or ??-brass and ?-brass. In said at least one coating layer (3) containing ?-brass and/or ??-brass and ?-brass, the ?-phase and/or ??-phase and the ?-phase are arranged next to each other in a fine-grained structure in which the mean size of the ?-brass and/or ??-brass grains and the ?-brass grains amounts to a maximum of 5 ?m relative to the cross-section extending perpendicular to the longitudinal axis of the wire electrode (1, 1?).

Abstract: The invention relates to a wire electrode for spark-erosion cutting. The wire electrode comprises a core made of more than 50% by weight pure crystalline aluminum and/or one or more crystalline aluminum alloys, and comprises a coating layer encompassing the core and comprising copper, zinc, and/or a copper-zinc alloy. The proportion of the surface area of the core relative to the total cross-sectional area of the wire electrode is in the range from 60% to 95% along the entire length of the wire electrode.

Abstract: The invention concerns a high-strength erosion electrode having good electrical conductivity. The erosion electrode is made up of a steel core, an intermediate layer of copper or a copper-containing alloy, and an outer layer containing at least 40% zinc or, alternatively, a steel core and a zinc alloy outer layer having a zinc content of from 40-60%. The steel core has a patented structure which contains between 0.6 and 1 wt. % carbon and occupies an area corresponding to between 50 and 75% of the erosion electrode diameter, the intermediate layer occupying an area of between 5 and 40% of the total diameter, the outer layer occupying an area of between 10 and 30%, and the zinc content of the outer layer being between 40 and 60 wt. %. In the alternative embodiment, the steel core occupies an area corresponding to between 50 and 75% of the erosion electrode diameter and the outer layer occupies the balance.

Abstract: In order to achieve a reduction in wear of the wire guide rollers, apart from an improvement in the cutting speed and an improvement in current conduction, a wire electrode for spark erosion cutting of metals etc., comprising either a homogenous center (1) made of a metal or of a metal alloy, or a composite center, is provided with a sheath coating (2) whose surface is structured, wherein the indentations (3) created by the structure, are filled by a filler (4) made of an easily vapourable metal or of a metal alloy, so as to achieve a surface with little peak-to-valley height, i.e. with little surface roughness.

Abstract: A wire electrode for spark erosion cutting of metals, electrically-conducting ceramics etc., comprising either a homogenous centre (1) made of a metal or of a metal alloy, or a composite centre made from a steel core with a coating of copper or copper alloy, wherein the wire electrode comprises at least two sheath coatings made of zinc alloys, with said coatings wearing during erosion. In order to increase performance during high-speed cutting, such a wire electrode comprises an inner sheath coating (2) predominantly comprising &bgr;-brass, and an outer sheath coating (3) predominantly comprising &ggr;-brass, wherein the fraction of &bgr;/&bgr;′-phase or &ggr;-phase in the two sheath coatings is at least 60%. The ratio of the coating thickness of &bgr;-brass to &ggr;-brass is between 0.3 and 7. The sum of the thicknesses of both sheath coatings in relation to the external diameter of the electrode is between 0.1 and 0.3.

Abstract: Conventional weld fillers contain copper, aluminum and manganese. These weld fillers are as a rule not suited for the welding of thin or rust-free sheet metals. The inventive weld filler contains 0.5 to 6.0 percent by weight Al, 0.5 to 8.0 percent by weight Mn, the usual impurities are less than or equal to 1.0 percent by weight and as the remainder Cu. This weld filler is better suited for the welding of thin or rust-free sheet metals than the up to now known weld fillers.

Abstract: A wire electrode, and a method for making it, for use in spark-erosive cutting having an electrically conducting core essentially absorbing the tensile forces. The wire electrode has furthermore a coating which wears during erosion, which coating consists of two layers. Such a wire electrode is suited for both quick cutting and also for fine cutting of workpieces. The wire electrode has for this purpose an inner layer of the coating, which serves the quick cutting process and consists of an essentially homogenous alloy. Whereas the outer layer of the coating is provided for the fine cutting and has a zinc content of above 80 wt. %, whereby the layer thickness of the outer layer lies at ⅕ of the layer thickness of the remaining coating.

Abstract: The invention concerns a high-strength erosion electrode having good electrical conductivity. The erosion electrode is made up of a steel core, an intermediate layer of copper or a copper-containing alloy, and an outer layer containing at least 40 % zinc. The steel core has a patented structure which contains between 0.6 and 1 wt. % carbon and occupies an area corresponding to between 50 and 75 % of the erosion electrode diameter, the intermediate layer occupying an area of between 5 and 40 % of the total diameter, the outer layer occupying an area of between 10 and 30 %, and the zinc content of the outer layer being between 40 and 60 wt. %.

Abstract: In order to produce a wire electrode having a core consisting of a copper/zinc alloy and to produce a specific sheath layer, the sheath layer is coated onto the core at a temperature at which no diffusion occurs. The wire electrode is subsequently heated at a heating speed higher than 10° C. per second, briefly annealed at temperatures above 500° C. and subsequently cooled again very rapidly at cooling speeds higher than 10° C. per second.

Abstract: A method and a wire electrode for the spark-erosive cutting of hard metal, whereby the wire electrode has a core and at least one outer coat surrounding the core and wearing during cutting. To avoid corrosion, as, for example, pitting, a wire electrode is chosen, the wearing outer coat of which consists of a metal or a metal alloy which is not nobler than the binder contained in the hard metal, and the metal or the metal alloy has an electrode potential which is less than or equal to &phgr;0=−0.28 V, referred to a standard hydrogen electrode.

Abstract: The pin for electronic assemblies according to the present invention consists of a core alloy with 0.2 to 1.5 wt. % Ag, the remainder copper, whereby at least the contact surface of the pin is provided with one or several highly conductive and/or easily solderable coatings. With this not only a higher electric conductivity of the contact is obtained but also a comparatively high strength with simple production and good workability, which makes it possible to miniaturize the pins.

Abstract: A high-temperature, nickel-free alloy, in particular for spectacle frames, jewelry, etc. With the following composition in percentages by weight:Zn 3.0-7.0%Mn 8.0-13.0%Fe 0.5-3.5%Al 4.5-8.00Cu the remainder.

Abstract: A high-temperature, nickel-free alloy, in particular for spectacle frames, jewelry, etc. with the following composition in percentages by weight:______________________________________ Zn 13.0-16.0% Mn 9.0-11.0% Fe 1.0-2.0% Al 4.0-5.5% Cu the remainder.

Abstract: In order to produce a wire electrode having a core consisting of a copper/zinc alloy and to produce a specific sheath layer, the sheath layer is coated onto the core at a temperature at which no diffusion occurs. The wire electrode is subsequently heated at a heating speed higher than 10.degree. C. per second, briefly annealed at temperatures above 500.degree. C. and subsequently cooled again very rapidly at cooling speeds higher than 10.degree. C. per second.

Abstract: An alloy, in particular for use in the manufacture of jewelry, frames for glasses, and the like. In order to be able to manufacture jewelry, frames for glasses, and the like of a nickel-free alloy inexpensively and well, the following alloy has been produced according to the invention, which, in percentages by weight, has the following composition: Cu 86.0-90.0 percent, Al 2.8-4.5 percent, Mn 0.4-1.3 percent, Fe 1.0-2.5 percent, Si 0-0.5 percent, the remainder being Zn.

Abstract: In order to produce a wire electrode having a core consisting of a copper/zinc alloy and to produce a specific sheath layer, the sheath layer is coated onto the core at a temperature at which no diffusion occurs. The wire electrode is subsequently heated at a heating speed higher than 10° C. per second, briefly annealed at temperatures above 500° C. and subsequently cooled again very rapidly at cooling speeds higher than 10° C. per second.