STUDY EROSION RESISTANCE ELECTRODE TOOL FROM COMPOSITE MATERIALS FOR ELECTRICAL DISCHARGE MACHINING
The requirements to the tool electrode are studied. Composite materials were made by powder metallurgy from copper with different content of the refractory phase. The influence of the content of the refractory phase of systems "copper-refractory metal”, “copper-graphite”, “copper-ceramics” on the porosity, electrical resistivity, relative wear resistance of the electrode made of composite material. It is found that by increase of the content of any additives, in addition to graphite, increases porosity and electrical resistivity of a composite material. It is determined that the relative wear resistance at EDM firmware electrode-tool made of composite materials based on copper, containing refractory metals, more just depends on the heat resistance of the refractory metal; systems based on copper with nonmetals relative wear is reduced when using electrically conductive and having a capillary effect ceramic phases.