Surface modification of tool steel by using EDM green powder metallurgy electrodes

Electro-discharge machining (EDM) is mostly used for machining difficult-to-cut materials which are difficult to machine by conventional machining processes. In recent years, EDM is also used for surface modification. This work aims to investigate the phenomenon of surface modification of tool steel...

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Published inIOP conference series. Materials Science and Engineering Vol. 1037; no. 1; pp. 12014 - 12020
Main Authors Balanou, M, Karmiris-Obratański, P, Papazoglou, E L, Galanis, N I, Markopoulos, A P
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.02.2021
Subjects
Copper
EDM electrodes
Machining
Powder metallurgy
Pulse duration
Surface roughness
Tool steels
Zirconium dioxide
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Summary:Electro-discharge machining (EDM) is mostly used for machining difficult-to-cut materials which are difficult to machine by conventional machining processes. In recent years, EDM is also used for surface modification. This work aims to investigate the phenomenon of surface modification of tool steel Calmax (Uddeholm) by EDM process using Cu-ZrO2 powder metallurgy green compact electrode. Results show that the higher Material Transfer Rate of 46.5 mgr/min is achieved on the combination of Ip=9A and Ton=25 μs. The effect of peak current and pulse duration on the material transfer rate and surface roughness (Ra and Rz) was investigated. Machined surfaces were characterized by scanning electron microscopy (SEM).
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/1037/1/012014