Detail publikace

Analysis of Machinability and Crack Occurrence of Steels 1.2363 and 1.2343ESR Machined by Die-Sinking EDM

MOURALOVÁ, K. BENEŠ, L. BEDNÁŘ, J. ZAHRADNÍČEK, R. PROKEŠ, T. FRIES, J.

Anglický název

Analysis of Machinability and Crack Occurrence of Steels 1.2363 and 1.2343ESR Machined by Die-Sinking EDM

Typ

Článek WoS

Jazyk

en

Originální abstrakt

Die-sinking electric discharge machining (EDM) is an indispensable technological operation, especially in the production of molds and all internal and external shapes and cavities. For this reason, the effect of machine parameter settings (open-voltage, pulse current, pulse on time, and pulse off time) on the machining of two types of steels, 1.2363 and 1.2343ESR, was carefully investigated using graphite or copper electrodes in 10mm × 10 mm or 100mm × 100 mm shapes. For this purpose, a two-level half factor experiment was performed with one replication at the corner points and two replications at the central points, with a total of 80 rounds. The subject of the evaluation was the topography and morphology of machined surfaces including a detailed analysis of surface and subsurface defects in the form of cracks including the creation of regression equations describing the probability of crack occurrence. Furthermore, a study of the local hardness change in the subsurface area was performed, and lamellas were also made and studied by transmission electron microscopy. It has been found that by using die-sinking EDM, it is possible to effectively predict the probability of cracking on machined surfaces and also on machine 1.2363 and 1.2343ESR steels with a very good surface quality of Ra 1.9 and 2.1 µm using graphite electrodes. These findings will ensure the production of parts with the required surface quality without cracks, which is a crucial aspect for maintaining the required functionality and service life of the parts.

Klíčová slova anglicky

die-sinking EDM; electrical discharge machining; steel; design of experiment; cracks; machining parameters

Vydáno

2020-04-19

Nakladatel

MDPI

Místo

Švýcarská konfederace

ISSN

2079-6412

Ročník

10

Číslo

4

Strany od–do

1–18

Počet stran

18

BIBTEX


@article{BUT163597,
  author="Kateřina {Mouralová} and Libor {Beneš} and Josef {Bednář} and Radim {Zahradníček} and Tomáš {Prokeš} and Jiří {Fries}",
  title="Analysis of Machinability and Crack Occurrence of Steels 1.2363 and 1.2343ESR Machined by Die-Sinking EDM",
  journal="Coatings, MDPI",
  year="2020",
  volume="10",
  number="4",
  pages="1--18",
  doi="10.3390/coatings10040406",
  issn="2079-6412",
  url="https://www.mdpi.com/2079-6412/10/4/406"
}