Paper Title:
Migration of Materials during Finishing Micro-EDM of Tungsten Carbide
  Abstract

Present study aims to investigate the migration of materials onto the surface of workpiece and electrode during fine-finish die-sinking and milling micro-EDM of tungsten carbide using pure tungsten electrode. The effect of materials transfer on the machined surface characteristics is also presented. The machined surfaces have been examined under scanning electron microscope (SEM) and energy dispersive X-ray (EDX) in order to investigate the changes in chemical composition due to the migration of materials. It has been observed that materials from both workpiece and electrode transfer to each other depending on machining conditions and discharge energy. A significant amount of carbon migrates to both electrode and workpiece surface due to the decomposition of dielectric hydrocarbon during breakdown. The migration occurs more frequently at lower gap voltages during finish die-sinking micro-EDM due to low spark gap and stationary tool electrode. Milling micro-EDM suffers from lower amount of carbon migration and fewer surface defects which improve the overall surface finish and reduce surface roughness significantly.

  Info
Periodical
Edited by
Jun Wang,Philip Mathew, Xiaoping Li, Chuanzhen Huang and Hongtao Zhu
Pages
681-686
DOI
10.4028/www.scientific.net/KEM.443.681
Citation
M. P. Jahan, M. Rahman, Y. S. Wong, "Migration of Materials during Finishing Micro-EDM of Tungsten Carbide", Key Engineering Materials, Vol. 443, pp. 681-686, 2010
Online since
June 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Fatemeh Karimi Pour, Mahrokh Bavandi, Azli Yahya
Chapter 2: Industrial Electrical Power Machines and Systems
Abstract:Electrical discharge machining (EDM) is one of the earliest non-traditional machining processes and controlled process where pulsed...
112
Authors: Ľuboslav Straka, Slavomíra Hašová
Chapter 4: Tools and Equipments in Production Systems for Material Machining
Abstract:Technology of Electrical Discharge Machining (EDM) uses thermal energy in material removal, in which is the electrical energy transformed,...
302
Authors: M.A. Moudood, Abdus Sabur, Mohammad Yeakub Ali, I.H. Jaafar
Chapter 1: Non Conventional Processing Technology in Mechanical Engineering
Abstract:Electrical discharge machining (EDM) is a non-conventional machining technique which can be used to machine non-conductive ceramics. This...
3