Abstract
The TiAlCrSiYN-based family of physical vapor deposition (PVD) coatings were systematically designed through the incorporation of TiAlCrN interlayer to increase coating adhesion and consequently the tool life for extreme conditions that arise during dry high-speed milling of hardened tool steels. The investigation in the present paper intends to explain the effect of TiAlCrN interlayer thickness on the overall coating properties and cutting performance. A comprehensive characterization of the structure and properties of the coatings has been performed using focused ion beam (FIB), scanning electron microscope (SEM), X-ray powder diffraction (XRD), nanoindentation, ramped load scratch test, repetitive load wear test, and nano-impact test. The wear test at a subcritical load of 1.5 N showed that there was a gradual improvement in coating adhesion to the substrate as the interlayer thickness increased from 100 to 500 nm. However, the wear performance, being related to the ability of the coating layer to exhibit minimal surface damage under operation, was found to be associated with micro-mechanical characteristics (such as hardness, elastic modulus). Around a 40% increase in the cutting performance with 300 nm interlayer exhibited that a substantial increase in tool life can be achieved through interlayer thickness variation, by obtaining a balance between mechanical and tribological properties of the studied coatings.
Highlights
Over the years, concepts such as high speed machining [1] have been considered in an attempt to expand the application of milling of H13 tool steel (HRC 45-55) in their hardened state for dies and molds.This process benefits material removal rates, lead times, cutting forces, part precision, and surface finishes [2] during machining
Considering the aforementioned dependencies, the selection of nano-interlayer thickness has to Considering the aforementioned dependencies, the selection of nano-interlayer thickness has to be appropriate with regard to the substrate topography as well as the coatings’ overall mechanical and be appropriate with regard to the substrate topography as well as the coatings’ overall mechanical tribological properties
TiAlCrSiYN based multilayer coatings with varying interlayer thicknesses were systematically studied in terms of microstructure and micromechanical properties
Summary
Concepts such as high speed machining [1] have been considered in an attempt to expand the application of milling of H13 tool steel (HRC 45-55) in their hardened state for dies and molds This process benefits material removal rates, lead times, cutting forces, part precision, and surface finishes [2] during machining. Complex coatings with nano-columnar and nano-laminated structures were (i.e., introduced coatings) to significantly improve the multi-functionality the coating. This is accomplished multilayer [11] were introduced to significantlyofimprove the layer. This was successfully determined interlayer shown to have improved coating adhesion than theproperty multilayer coating [23] This property by wasa micro-scratch test in terms crack propagation resistance (CPRs).
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
