Title: Effect of workpiece material on the machine-ability and surface integrity in EDM process

Authors: Mohammadreza Shabgard; Mirsadegh Seyedzavvar; Rasoul Abbaspour

Addresses: Department of Manufacture, Faculty of Mechanical Engineering, University of Tabriz, P.O. Box 51664-16471, Tabriz, East Azerbaijan Province, Iran ' Department of Manufacture, Faculty of Mechanical Engineering, University of Tabriz, P.O. Box 51664-16471, Tabriz, East Azerbaijan Province, Iran ' Department of Manufacture, Faculty of Mechanical Engineering, University of Tabriz, P.O. Box 51664-16471, Tabriz, East Azerbaijan Province, Iran

Abstract: This paper represents results of an experimental, comparative investigation of the effect of different parameters on evaluation of electrical discharge machining characteristics of newly developed powder metallurgy tool steel in forging industry, ASP30 and widely used hot-work tool steel, AISI H13. The studied process characteristics comprise the material removal rate, tool wear ration and texture features of surface layer including arithmetic surface roughness and white layer of the machined workpiece after the EDM process. The experiments carried out under a full factorial procedure and the considered EDM input parameters included pulse on-time and pulse current. Experimental results reveal that overall the material removal rate and tool wear ratio of the EDM process of H13 tool steel is more than that of ASP30 tool steel. Also, the results show that the surface texture features of ASP30 is better than that of H13 after EDM process.

Keywords: electro-discharge machining; EDM; ASP30 tool steel; H13 tool steel; material removal rate; MRR; tool wear ratio; TWR; surface integrity; machinability; electrical discharge machining; powder metallurgy; forging industry; surface texture features; surface roughness; surface quality.

DOI: 10.1504/IJMMM.2013.057603

International Journal of Machining and Machinability of Materials, 2013 Vol.14 No.4, pp.387 - 402

Received: 05 Oct 2012
Accepted: 27 Apr 2013
Published online: 26 Dec 2013 *

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