Threading Performance of Different Coatings for High Speed Steel Tapping

Alain Gil Del Val, Fernando Veiga, Octavio Pereira, Luis Norberto Lopez De Lacalle

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16 Citas (Scopus)
5 Descargas (Pure)

Resumen

Threading holes using tapping tools is a widely used machining operation in the industry. This manufacturing process involves a great tool immersion in the part, which involves both friction and cutting. This makes the use of coatings critical to improving tool life. Four coatings are used based on Physical vapor deposition (PVD) technology—TiN, TiCN, TiAlN and TiAlN+WC/C are compared to uncoated tool performance. The effect of various coatings on the life ofM12 _ 1.5 tapping tools during threading of through holes 20 mm deep, in GG25 casting plates, dry and applying cutting speed of 50 m/min. The end-of-life criterion has been established based on a cutting torque of 16 N-m. Taking the uncoated tap as a basis for comparison, it is observed that coatings based on PVD technologies increase tool life doubling in the most advantageous case with the TiAlN coating. PVD type coatings provide better protection towear at cylindrical area of the tool, where the thread profile is finished, than uncoated taps. The teeth located in the cone-cylinder transition zone of the taps suffer the most wear regardless of the coating. However, taps coated with TiAlN+WC/C wear level values is lowest of all the coatings tested, which indicates a strong reinforcement in these teeth.
Idioma originalInglés
Número de artículo464
Páginas (desde-hasta)464
Número de páginas1
PublicaciónCoatings
Volumen10
N.º5
DOI
EstadoPublicada - 1 may 2020

Palabras clave

  • Tapping
  • Tap coatings
  • Flank wear
  • Threading torque

Project and Funding Information

  • Funding Info
  • This research was funded by the vice-counseling of technology, innovation and competitiveness of the Basque Government grant agreements IT-2005/00201, ZL-2019/00720 (HARDCRAFT project) and KK-2019/00004 (PROCODA project).

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