Simultaneous machining and surface alloying of AISI 1040 steel by electrical discharge machining with boron oxide powders

ÖZERKAN H. B.

JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, cilt.32, sa.9, ss.4357-4364, 2018 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 32 Sayı: 9
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1007/s12206-018-0834-0
  • Dergi Adı: JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.4357-4364
  • Anahtar Kelimeler: Boron oxide powder mixed dielectric, Electrical discharge machining, Micro hardness, Surface alloying, XRD analysis, DIELECTRIC FLUID, EDM PROCESS, SUSPENSION, OPTIMIZATION, PARAMETERS, GRAPHITE, KEROSENE, SILICON, LAYER
  • Gazi Üniversitesi Adresli: Evet

Özet

In PM/EDM, it is known that when used electrically conductive powders, highly homogeneous alloyed layers can be formed where the gap extends slightly more than using non-conductive powders and regulates spark discharge and machining voltage more uniform. Boron element is non-conductive but when alloyed with steel, materials with high abrasion and corrosion resistance are obtained. In this study, the effects of boron oxide powders addition into dielectric fluid on microstructure and hardness of steel workpiece in electrical discharge machining (EDM) were investigated. For this purpose, by using a prismatic steel workpiece and a copper electrode in kerosene mixed with boron oxide (B2O3) powders, the morphology of the machined specimens at different powder concentrations and pulse duration settings were observed and investigated. In addition, the micro hardness of the layers occurred as a result of EDM was measured and discussed. The highest surface hardness value of 941 HV is measured over machined specimen with B2O3 powder addition, whereas the lowest surface hardness value of 413 HV is measured.