Performance of WC- inserts coated with nanometric [TiN/TiAlN]n- multilayer for the cutting processing of hardened AISI 4340 steel

Authors

  • Luis Henry Moreno GIDEM Group
  • Julio Cesar Caicedo University of Valle
  • Gilberto Bejarano Gaitan University of Antioquia
  • Federico Martínez Technological University of Havana "José Antonio Echeverría"
  • Pedro Prieto Pulido University of Valle

DOI:

https://doi.org/10.17533/udea.redin.14602

Keywords:

wear resistance, surface roughness, magnetron sputtering, multinanolayered

Abstract

In the present work wear resistance of 4 μm uncoated tungsten carbide inserts (WC) and coated with [TiN/TiAlN]n multinanolayered or with commercial TiCN-Al2O3-TiN monolayers (TINAL) are examined. Life tests, cutting area temperature analysis, surface roughness measurements on work pieces, roughness measurements on the attacked surface, contact track analysis between chip-insert and chemical composition analysis (EDS) were carried out. Mechanical tests were conducted on AISI 4340 steel parts using cutting regime and applying high speed cutting (HSC). Machining results showed that for a distance of 8,000 m the inserts coated with 300 bilayers exhibited wear values of 0.117 mm, inserts coated with 200 bilayers showed values of 0.138 mm and those coated with TINAL presented wear values of 0.174 mm. Moreover, the temperature values for cutting speed at 176.6 m/mim for 300 bilayers was 522.6 oC, for 200 bilayers was 721.4 oC and 1,327.6 oC for inserts coated with TINAL. Lower temperatures, caused by a lower friction coeffi cient and cutting force, contribute to life-time increasing at WC inserts.

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Author Biographies

Julio Cesar Caicedo, University of Valle

Thin Films Group, Department of Physics.

Gilberto Bejarano Gaitan, University of Antioquia

Corrosion and Protection Group.

Federico Martínez, Technological University of Havana "José Antonio Echeverría"

Materials Group Faculty of Mechanical Engineering.

Pedro Prieto Pulido, University of Valle

Center of Excellence in New Materials.

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Published

2013-02-27

How to Cite

Moreno, L. H., Caicedo, J. C., Bejarano Gaitan, G., Martínez, F., & Prieto Pulido, P. (2013). Performance of WC- inserts coated with nanometric [TiN/TiAlN]n- multilayer for the cutting processing of hardened AISI 4340 steel. Revista Facultad De Ingeniería Universidad De Antioquia, (58), 85–94. https://doi.org/10.17533/udea.redin.14602

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