Performance evaluation of a tungsten carbide–based self-lubricant cutting tool

Abstract

Tungsten carbide cutting tools with and without solid lubricant (WC-10Co-5CaF 2 and WC-10Co) were developed inhouse via powder metallurgy. The developed cutting tools and a commercial WC-10Co cutting tool were used to machine cylindrical AISI 1020 steel material under dry conditions. The cutting force and average cutting tool temperature were continuously measured. The cutting tool flank surface and chip morphology after specific tool life (5 min of cutting) were examined to understand tool wear. The flank wear of the considered cutting tools was also measured to quantify the cutting tool life. The surface roughness of the workpiece was measured to determine the machining quality. The developed cutting tool with solid lubricant (WC-10Co-5CaF 2) generated 20%-40% less cutting force compared to that of the developed cutting tool without solid lubricant (WC-10Co). In addition, the finish of the workpiece surface improved by 16%-20% when it was machined by the solid lubricant cutting tool. The cutting tool with solid lubricant (WC-10Co-5CaF 2) exhibited a 15%-18% reduction in flank wear. Curlier and smaller saw tooth chips were generated from the WC-10Co-5CaF 2 cutting tool, confirming that less heat was generated during the cutting process, and the finish of the machined surface was also improved.

Green machining using graphene-based self-lubricating cutting tool – a preliminary investigation

“…Tool with 5 wt% (CaF 2 ) showed highest rupture strength proving suitable for usage as cutting tool. Similar results were reported by Muthuraja and Senthilvelan (2018).…”

“…Tool with 5 wt% (CaF 2 ) showed highest rupture strength proving suitable for usage as cutting tool. Similar results were reported by Muthuraja and Senthilvelan (2018). Jianxin et al (2009) made micro holes on rake and flank face of cemented carbide, cobalt tool and filled them with molybdenum disulfide (a solid lubricant) and tested them while turning hardened steel and performance is compared with conventional tool.…”

RETRACTED: Development of a dual-layered diamond-coated WC–Co cutting tool for enhancing tool life in the dry machining of mild-steel alloy

“…Also, during the development of adaptive smart machining when using smart cutting tools, there is minimization in the machining time and improvement in surface roughness. 41,42 In this work, the DDCS was deposited on WC-Co tool bit with top-layer nanocrystallinity to enhance its…”

Advances in micro cutting tool design and fabrication

“…Muthuraja et al [73] developed WC cutting tools with a WC-10Co-5CaF 2 and WC-10Co solid lubricant for the dry machining of AISI 1020 steel, which was then compared against unlubricated WC tools. The results revealed that the solid lubricant WC-10Co-5CaF 2 tool exhibited reduced cutting force in all directions during turning.…”