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Effect of carbon content in TiCxN1−x coating on the adhesivity of carbide cutting tools and machining performance

Published online by Cambridge University Press:  03 February 2016

Ping Chuan Siow*
Affiliation:
Department of Mechanical and Material Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
Jaharah Abdul Ghani
Affiliation:
Department of Mechanical and Material Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
Che Hassan Che Haron
Affiliation:
Department of Mechanical and Material Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
Mariyam Jameelah Ghazali
Affiliation:
Department of Mechanical and Material Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
Talib Ria Jaafar
Affiliation:
Department of Mechanical Engineering, Universiti Teknologi Mara, 13500 Bukit Mertajam, Pulau Pinang, Malaysia
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Titanium carbonitride (TiCN) is a popular hard coating for carbide cutting tools in various applications. This paper studied the influence of the carbon content and coating composition within TiCxN1−x coatings with regard to their adhesive strength on tungsten carbide substrate and subsequently, the performance of cutting tool in the dry turning of stainless steel. Among all the TiCxN1−x coatings, the TiCN coating has exhibited the highest adhesivity onto a substrate, followed by a TiC coating and lastly, a TiN coating. It was found that the adhesive strength of TiCN coating increased with the carbon content. The C/N ratio or C–N bond is a vital contributor to the adhesivity of the TiCxN1−x coating rather than the C or N atoms in the TiCxN1−x coating. It was found that the coating was delaminated before the exposure of substrate material. Hence, coating with higher adhesivity will promote longer tool life.

Type
Invited Articles
Copyright
Copyright © Materials Research Society 2016 

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References

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