ISSN:
1013-9826
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
Based on analysis of the mechanism of Electrical Discharge Machining (EDM) and thecharacteristics of deposition processing, the processing conditions of micro EDM Deposition (microEDD) are determined. Micro EDD is a new EDM method taking air as machining medium, usingnarrow pulse width, long pulse interval, low discharge current and connecting the tool electrode withthe anode of pulse generator. Using EDM shaping machine and brass, tungsten and steel as toolelectrode respectively, micro cylinders are deposited on high-speed steel surface. And then themicrostructure of deposit is analyzed detailedly. Results show that elements of the deposited materialdistribute uniformly, whose components depend on the tool electrode material. As the high coolingrate of the solidification process, the deposit grain size refines obviously, which leads to the hardnessof tungsten or steel deposit increasing. Moreover, the Metallurgical bonding has occurred on theinterface between deposit and high-speed steel base, whose thickness is about 5μm
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.375-376.153.pdf
Permalink