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About EDM Electrode Materials
EDM electrode materials and components consist of highly conductive and/or arc erosion-resistant materials such as graphite, copper or copper graphite. EDM is an acronym for electric discharge machining, a process that uses a controlled electrical spark to erode metal. EDM electrode materials include components made from brass, copper and copper alloys, graphite, molybdenum, silver, and silver tungsten.
EDM electrodes are manufactured in variety of forms such as coated wire, tube shaped, or bar stock, depending on the EDM electrode materials used and the application. A brass electrode is easy to machine and can also be die cast or extruded for use in special applications. However, brass is not as wear-resistant as other EDM electrode materials, such as copper or tungsten, so it is typically used to make EDM wire. Copper is a common base material because it is highly conductive and strong. A copper tungsten electrode is used in resistance welding electrodes and in circuit breakers. A copper zirconium diboride electrode is similar to a copper tungsten electrode, but has much higher erosion resistance and is more expensive to produce. A tellurium copper electrode is easy to machine and is useful in applications that require an electrode with a fine finish.
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Engineering Web: EDM Electrode Materials
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Society of Manufacturing Engineers Abstract for Influence of Electrode Materials and Polarities on the Electrode Erosion Rates in EDM |
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Society of Manufacturing Engineers The results show that the removal rate and the electrode wear vary with the resonant frequency and type of electrode materials. |
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A study on the fine-finish die-sinking micro-EDM of tungsten... A study on the fine-finish die-sinking micro-EDM of tungsten carbide using different electrode materials |
