Investigation on Effects of Different Graphite Grades on EDM of Hybrid Tool Steel

Yaman S., Çakır O.

Congress on Advances in Mechanical and Systems Engineering (CAMSE) 2021, Jalandhar, India, 17 - 19 July 2021

  • Publication Type: Conference Paper / Unpublished
  • City: Jalandhar
  • Country: India
  • Yıldız Technical University Affiliated: Yes


In manufacturing industry, a material which has more than 60 HRC hardness value; conventional methods are not effective as much as non-traditional methods. Therefore, it is required to use alternative methods like electric discharge machining (EDM) which has a high hardness and complex geometry advantages. In this experiment a EDM method presented for different electrode grades. Graphite has a better machining performance for EDM than other electrode materials. EDM effects on material removal rate (MRR), electrode wear rate (EWR) and peak surface roughness (Rz) experimentally determined. Selected parameters were graphite type as electrode material (HK3, HK15, HK 75), current (2, 3, 4), pulse on time (Ton - 25, 30 and 35µs) and pulse off time (Toff - 15, 20 and 25 µs). Differences in the MRR results in the change in the Rz higher values of parameters increased Rz, MRR and Rz values. In this experiment Taguchi L9 orthogonal experimental design method has been used on WP7V hybrid tool steel.