Study on turning performance of PVD TiN coated Al2O3+TiCN ceramic tool under cutting fluid reinforced by nano-sized solid particles


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Kıvak T., Sarıkaya M., Yıldırım Ç. V. , Şirin Ş.

JOURNAL OF MANUFACTURING PROCESSES, cilt.56, ss.522-539, 2020 (SCI Expanded İndekslerine Giren Dergi)

  • Cilt numarası: 56
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1016/j.jmapro.2020.05.017
  • Dergi Adı: JOURNAL OF MANUFACTURING PROCESSES
  • Sayfa Sayısı: ss.522-539

Özet

Due to their excellent chemical stability, hardness and abrasion resistance, ceramic cutting tools are suitable for

operations at very high cutting speeds, which play a decisive role in high productivity. Thanks to these properties,

they are significantly resistant to high temperatures occurred in the cutting zone. However, after a certain

point, excessive temperature rise in the cutting zone brings some problems. This is seen as a problem that should

be overcome as it affects negatively machining efficiency. However, the poor resistance of ceramic tools to

thermal shocks is an important factor restricting the use of flood cooling. Alternatively, promising results have

been achieved recently in MQL and nanofluid-MQL applications particularly on carbide cutting tools. When

these methods are used together with ceramic cutting tools, the behavior of ceramic cutters and their effect on

machinability outputs is still a matter of curiosity. Therefore, in order to observe the interaction between

ceramic cutting tool and minimum quantity lubrication (MQL) and nanofluid-MQL, we investigated the turning

performance of PVD TiN coated Al2O3+TiCN ceramic tool under dry, pure-MQL and nanofluid-MQL reinforced

by nano-sized solid particles such as graphene nanoplatelets (GNPs) and multi walled carbon nanotubes

(MWCNTs). Experiments were carried out to investigate the effect of cooling/lubrication (C/L) environment and

cutting parameters on tool life, surface roughness and maximum temperature of chip. In addition, a series of

experiments were also made to observe the effect of only C/L environment on the wear behavior of the ceramic

tools and the machined surface topography while keeping the cutting parameters constant. As a result, pure-MQL

contributed to the reduction of nose wear by about 69% compared to dry machining, while GNPs based nanofluid-

MQL helped to reduce the surface roughness by 19.42%.