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高温材料处理:国际期刊
SJR: 0.137 SNIP: 0.341 CiteScore™: 0.43

ISSN 打印: 1093-3611
ISSN 在线: 1940-4360

高温材料处理:国际期刊

DOI: 10.1615/HighTempMatProc.v11.i1.100
pages 115-124

Effect of thermo-capillary (Marangoni) convection in Electronic Discharge Machining (EDM)

B. Revaz
University of Geneva, Group of Applied Physics and Dept of Condensed Matter Physics 24 quai E.-Ansermet, CH-1211 Geneva 4, Switzerland
G. Witz
University of Geneva, Group of Applied Physics and Dept of Condensed Matter Physics 24 quai E.-Ansermet, CH-1211 Geneva 4, Switzerland
R. Flukiger
University of Geneva, Group of Applied Physics and Dept of Condensed Matter Physics 24 quai E.-Ansermet, CH-1211 Geneva 4, Switzerland

ABSTRACT

The mass and heat flows due to thermo-capillary (Marangoni) forces in a melt pool caused by a single discharge on a steel sample have been calculated using finite element analysis. The thermocapillary forces are found to modify significantly the geometry of the melt pool, to limit the evaporation of steel at the pool surface, and to induce convection with velocities exceeding 10 m/s. These results show that the thermo-capillary effect is important in the context of Electronic Discharge Machining (EDM). A scenario for matter removal that accounts for erosion rates measured in EDM operation is presented.