Cutting Performance of Cemented Carbide-Based Self-Lubricating Tool Embedded with CaF2 Solid Lubricants
Four micro-holes were made using micro-EDM on the rake face of the cemented carbide (WC/TiC/Co) tools. CaF2 solid lubricants were embedded into the microholes to form self-lubricating tool (SLT-1). Dry machining tests on hardened steel were carried out with the SLT-1 self-lubricating tool and conventional tool (SLT-2). The cutting forces, tool wear and friction coefficient were measured and compared. It was shown that the cutting performance of SLT-1 self-lubricating tool was greatly improved compared with that of the SLT-2 conventional tool. Through the analysis of cutting force theory and test results, the mechanism of cutting performance improvement was considered to be the formation of a self-lubricating film on the rake face which decreases the shear stress and the reduction of contact length between chip and tool.
Yungang Li, Pengcheng Wang, Liqun Ai, Xiaoming Sang and Jinglong Bu
W. L. Song et al., "Cutting Performance of Cemented Carbide-Based Self-Lubricating Tool Embedded with CaF2 Solid Lubricants", Advanced Materials Research, Vols. 291-294, pp. 3083-3087, 2011