Mechanical and metallurgical properties of AlTiN-coated HSS materials

Abstract

Purpose

The purpose of this paper is to examine mechanical and metallurgical properties of AlTiN coating HSS materials in detail.

Design/methodology/approach

In this study, high-speed steel (HSS) parts were processed by the way of machining and were coated with AlTiN on physical vapour deposition (PVD) workbench at approximately 650°C for 4 h. Tensile strength, fatigue strength and hardness tests for AlTiN coated HSS samples were performed. Samples were also analyzed by energy dispersive X-ray analysis (EDS), X-ray diffraction (XRD) and scanning electron microscope (SEM). The results were compared with uncoated HSS components.

Findings

It was found that an amorphous aluminium-oxide layer emerges on surface of parts by AlTiN coating. This layer prevents further oxide formations. The coating thickness of AlTiN-coated sample is between 1,530 and 1,558 μm. Compared to uncoated HSS, AlTiN coated HSS gives higher performance.

Research limitations/implications

It would be interesting to search different coatings for cutting tools. It could be the good idea for future work concentrated wear properties on tool materials using different coatings.

Originality/value

This paper provides information on mechanical and metallurgical behaviour of AlTiN coated HSS materials and offers practical help for the researchers and scientists working in the coating area.

Citation

Sahin, M., Dinç, M. and Misirli, C. (2013), "Mechanical and metallurgical properties of AlTiN-coated HSS materials", Industrial Lubrication and Tribology, Vol. 65 No. 6, pp. 418-424. https://doi.org/10.1108/ILT-05-2011-0032