[Kovove materialy - Metallic materials]
    Tue - January 16, 2018 - 14:40 No. of hits : 890237 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 55 (2017), Issue 6

Performance of cryogenically treated Cu and CuCrZr electrodes in an EDM process
vol. 55 (2017), no. 6, pp. 431 - 440

In this study, the effects of cryogenic treatment (CT) on the performance of CuCrZr alloy and Cu electrodes in electro discharge machining (EDM) of AISI P20 tool steel were investigated experimentally. For this purpose, a group of electrodes were cryogenically treated at –140 °C for 30 min and then tempered at 175 °C for 1 h. The tool performance was evaluated in terms of electrode wear rate (EWR), material removal rate (MRR), and average surface roughness ( Ra) of machined surfaces. The EDM tests were conducted at pulse currents of 4, 8, 12, and 16 A and pulse durations of 25 and 50 μs. Experimental results showed that treated electrodes were less worn than the untreated ones and the Ra values of machined surfaces decreased when cryo-treated electrodes were used. Also, it was observed that pulse current is the most effective parameter in the EDM process.

Key words
electro discharge machining (EDM), cryogenic treatment, wear rate, copper alloy

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.

Article abstracts updated: 2017-12-14 07:50      
Articles in press revised: 2017-11-14 12:19     
Full text pdf uploaded: 2017-12-14 11:25    
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