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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
ESCI SJR: 0.176 SNIP: 0.48 CiteScore™: 1.3

ISSN Imprimer: 1093-3611
ISSN En ligne: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v3.i2-3.50
pages 193-211

NEW INTERESTING RESULTS ON THE ELECTRO-DISCHARGE MACHINING

A. Miernikiewicz
Cracow University of Technology, Al. Jana Pawla II 37, 31-864 Krakow, Poland
L. Bratasz
Marian Smoluchowski Inst. of Physics, Jagellonian University, ul. Reymonta 4,30-459 Krakow, Poland
Stephane Pellerin
GREMI, CNRS-Universite d'Orleans, BP 6759, 45067 Orleans Cedex 2, France LASEP, Universite d'Orleans - Antenne de Bourges, BP4043, 18028 Bourges, France
N. Pellerin
CEMHTI, 1D avenue de la Recherche Scientifique, 45071 Orléans Cedex 2, France; Université d'Orléans, Avenue du Parc Floral, BP6749 Orléans Cedex2, France
K. Musiol
Marian Smoluchowski Inst. of Physics, Jagellonian University, ul. Reymonta 4,30-459 Krakow, Poland
J. Chapelle
LASEP, Centre Universitaire de Bourges, Rue Gaston Berger, BP 4043, 18028 Bourges Cedex, France

RÉSUMÉ

To have a better understanding of processes which play a role in erosion of electrodes caused by electro-discharge machining (EDM) plasmas, including the physical and chemical transformations in electrodes, it is important to know physical characteristics of the plasma and eroded materials. Its observation and their study, by techniques usual in a plasma or material science, have been undertaken. Following results have been obtained: measured plasma channel temperatures reaches values between 8000K and 10000K; craters observed on an electrode melting zone show important surface carbon concentration enrichment on about 20μm depth; mean diameter of the erosion crater on the cathode increases with time of the current impulse; for certain applied conditions, superposition of two current impulses, increased efficiency of our EDM device. Particularly, in the case of the cemented carbide, the improvement of erosion reached few hundred percents.


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