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Metals 2017, 7(2), 35; doi:10.3390/met7020035

Statistical Approach to Optimize the Process Parameters of HAZ of Tool Steel EN X32CrMoV12-28 after Die-Sinking EDM with SF-Cu Electrode

1
Department of Manufacturing Processes Operation, The Technical University of Košice, Štúrova 31, 08001 Prešov, Slovakia
2
Department of Science and Research, The Technical University of Košice, Bayerova 1, 08001 Prešov, Slovakia
3
Department of Mathematics, Informatics and Cybernetics, The Technical University of Košice, Bayerova 1, 08001 Prešov, Slovakia
*
Author to whom correspondence should be addressed.
Received: 13 December 2016 / Accepted: 20 January 2017 / Published: 27 January 2017
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Abstract

The paper describes the results of the experimental research of the heat affected zone (HAZ) of an eroded surface after die-sinking electrical discharge machining (EDM). The research was carried out on chrome-molybdenum-vanadium alloyed tool steel EN X32CrMoV12-28 (W.-Nr. 1.2365) after die-sinking EDM with a SF-Cu electrode. The aim of the experimental measurements was to contribute to the database of knowledge that characterizes the significant impact of the main technological and process parameters on the eroded surface properties during die-sinking EDM. The quality of the eroded surface was assessed from the viewpoint of surface roughness, microhardness variation, and the total HAZ depth of the thin sub-surface layer adjacent to the eroded surface. On the basis of measurement results, mathematical models were established by statistical methods. These models can be applied for computer simulation and prediction of the resultant quality of the machined surface after die-sinking EDM. The results achieved by simulation were compared with the results of experimental measurements and high correlation indexes between the predicted and real values were achieved. Suggested mathematical models can be also applied for the determination of the optimal combination of significant technological parameters in order to minimize microhardness and total HAZ depth variations of tool steel EN X32CrMoV12-28 after die-sinking EDM with a SF-Cu electrode. View Full-Text
Keywords: electro-erosion; microhardness; affected zone; tool steel; electrode electro-erosion; microhardness; affected zone; tool steel; electrode
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Straka, L.; Corný, I.; Pitel’, J.; Hašová, S. Statistical Approach to Optimize the Process Parameters of HAZ of Tool Steel EN X32CrMoV12-28 after Die-Sinking EDM with SF-Cu Electrode. Metals 2017, 7, 35.

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