Development of Nano Structured Coating on Cutting Tools for Machining Custom 465 Steel

Abstract

Development of nano structured coating on cutting tools for machining custom 465 steel Scholar: Prasath V Abstract: First phase of work involves developing an optimizing the TiN coatings. The morphological analysis also revealed the existence of strongly faced nano-grains with a triangular shaped morphology. The second phase of research involves developing TiN, SiN4 monolayer and TiN/ Si3N4 bilayer coated inserts using the PVD. Their structural, morphological, topographical, mechanical properties were examined. The third phase of research wok investigates the machinability evaluation and tool life of newly developed TiN/ Si3N4 bilayer and Si3N4 monolayer coated inserts during milling of custom 465 steel under dry environment. Multi objective optimization was done through TOPSIS. The tool wear investigations revealed that the TiN/ Si3N4 bilayer coated inserts have extended the tool life by 4.6 meters and outperformed uncoated and Si3N4 monolayer coated inserts, and proved to be most suitable for machining custom 465 steel