2013年5月1日星期三

POWDER METALLURGY-3. Fabrication of Tungsten -3.2 Shaping-02

Tungsten can be drilled, turned, milled, planed and ground. However, machining operations require experience and close adherence to optimum conditions. Preheating to about 200 and the use of cemented carbide tools are recommended. Complex shapes and holes can be formed by spark erosion; the tungsten workpiece forms the anode and the working electrode the cathode.
Tungsten (pure W, doped W, W-Re) is commercially available as wrought products (sintered bars, billets, forgings, rods, pins, disks, cylinders, tubes, sheet, strips, ribbons, wires) as well as in the form of a broad variety of shaped parts(crucibles, springs, heating elements, rivets, etc.).
Cold-rolled sheet is supplied in thicknesses from 0.025 to 0.4mm (up to 500mmxl000mm). Hot-rolled tungsten is available with thicknesses from 0.4 to 8.0mm (maximum lengths, 1500mm). Tungsten wires are manufactured from about I mm down to 5 µm.

Please visit our website www.tungsten-powder.com

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