An Investigation of Tribological Properties of CN and TiCN Coatings

Abstract

Today the tool industry on a worldwide basis uses hard, wear-resistant, and low-friction coatings produced by different processes such as electrochemical or electroless methods, spray technologies, thermochemical, chemical-vapor deposition (CVD), and physical vapor deposition (PVD). In the current work, two different coatings, nitrocarburized (CN) and titanium carbonitride (TiCN) on M2-grade tool steel, were prepared by commercial diffusion and PVD techniques, respectively. Properties such as thickness, roughness, and hardness were characterized using a variety of techniques, including glow-discharge optical emission spectrometry (GD-OES) and scanning electron microscopy (SEM). A crossed-cylinders wear-testing machine was used to investigate the performances of both coatings under lubrication. The effect of coatings on the performance of lubricants under a range of wear-test conditions was also examined. Degradation of lubricants during tribological testing was explored by Fourier transform infrared (FTIR) spectroscopy.

Investigation of wear behavior of carbide based coated rolling roll materials under dry and lubricated conditions

“…Thanks to the fact that the process is carried out at low temperatures, it does not adversely affect the mechanical strength and chemical structure of the matrix material due to the thermal effect. Also, the alteration in the dimensional properties of the material can be minimised by forming a thinner film compared to the CVD method [82]. In this way, the mechanical and tribological performance can be increased by preserving the physical and chemical properties of the matrix material.…”