Please use this identifier to cite or link to this item: http://hdl.handle.net/10603/123736
Title: Studies on Development of Micro Solid Lubricant Coating on Cutting Tools
Researcher: UMAMAHESHWERA REDDY P
Guide(s): SURESH KUMAR REDDY NARALA
Keywords: Development,Micro-Solid Lubricant,Coating on Cutting Tools
University: Birla Institute of Technology and Science
Completed Date: 1/8/2014
Abstract: Conventional metal cutting processes involve massive consumption of energy where the specific cutting energy is usually high. A major division of this energy is converted into heat which creates detrimental effects on cutting tool wear, tool life and surface quality of machined workmaterial. Although cutting fluids are effective to coerce this energy transfer, but the growing challenge to deal with the environmental and health aspects stood by coolant machining is imposing manufacturers to limit the usage of cutting fluids. Alternative to cutting fluid application, the aim of the current research work is to develop the concept of an approach to product manufacturing in producing novel coatings. In view of this, present work introduces an electrostatic micro-solid lubricant (EMSL) coating on carbide tool with molybdenum disulfide (MoS2) as a solid lubricant. To explore the level of success of this novel coating, efficacies of coatings were investigated in tribological as well as machining applications. newlineThe tribological behavior of EMSL coatings in dry sliding conditions is evaluated as per the ASTM G99 standard. A pin-on-disc tribological testing is conducted to examine the friction and wear behavior of EMSL coatings under dry sliding conditions at various sliding speeds and applied loads. The surfaces of the wear samples were examined under scanning electron microscopy and optical microscopy. Further, in order to assess the performance of developed EMSL coated cutting tool in machining process, an attempt has been made in comprehending the results on cutting forces, cutting temperatures, tool wear, chip formation and surface finish of machined workmaterial. newlineTribological studies reveal that the EMSL coating has the lowest friction coefficient on average of about 50% less at all the sliding conditions when compared to that of uncoated one. Wear volume of the specimens is linear satisfying the Archard s wear law and directly newlinev newlinedependent on the mechanical energy dissipated in the sliding contact. Further, the specifi
Pagination: 7.31 MB
URI: http://hdl.handle.net/10603/123736
Appears in Departments:Mechanical Engineering

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