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Metals 2016, 6(5), 95;

Properties Evaluation of Thin Microhardened Surface Layer of Tool Steel after Wire EDM

Department of Manufacturing Processes Operation, the Technical University of Košice, Štúrova 31, Prešov 08001, Slovakia
Department of Science and Research, the Technical University of Košice, Bayerova 1, Prešov 08001, Slovakia
Department of Mathematics, Informatics and Cybernetics, The Technical University of Košice, Bayerova 1, Prešov 08001, Slovakia
Author to whom correspondence should be addressed.
Academic Editor: Hugo F. Lopez
Received: 14 March 2016 / Revised: 13 April 2016 / Accepted: 15 April 2016 / Published: 25 April 2016
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This paper describes results of experimental research on the thin microhardened surface layer of a machined surface that occurs in materials using wire electrical discharge machining (WEDM) with brass wire electrode. The direct influence of microhardened surface layer on resulting machined surface quality of tool steel EN X210Cr12 (W.-Nr. 1.2080) was examined. The aim of the experiment was to contribute to the knowledge of mutual interactions between main WEDM technological parameters, the influence of these parameters on the total affected depth, and on the variation of microhardness of sub-surface layers of machined surface. Based on the microhardness experimental measurements, mathematical models were established by the Least Square Method (LSM) in order to simulate and predict final quality of machined surface after WEDM. Recommendations are given for setting the main technological parameters of the discharge process concerning minimization of total microhardened surface layer depth and microhardened surface layer homogeneity along the whole cross-section profile of the machined surface. View Full-Text
Keywords: machining; heat affected; tool steel; hardness machining; heat affected; tool steel; hardness

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Straka, Ľ.; Čorný, I.; Piteľ, J. Properties Evaluation of Thin Microhardened Surface Layer of Tool Steel after Wire EDM. Metals 2016, 6, 95.

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