Cutting temperature of cemented carbides base self-lubricated tool embedded with solid lubricants

Microholes were made on the rake of the cemented carbide tools and MoS₂ solid lubricants were embedded into the microholes to form self-lubricated tools (SLT-1). Dry machining tests on hardened steel were carried out with the self-lubricated tool, the tool with microholes on the rake without solid lubricants (SLT-2) and the conventional tool (SLT-3). The variation of cutting temperature for 45^# hardened steel cutting with the three cutting tools were tested by the TH5104 thermo tracer. The result shows that the cutting temperature of SLT-1 self-lubricated tool decreased obviously. It deceased 15%~20% than that of SLT-3. And the cutting temperature of SLT-2 decreased 5%~10% than that of SLT-3. Through the analysis of cutting temperature distribution, it was observed that the cutting temperature decreased and the raked face resistance was improved since self-lubricating film on the rake face decreased the shear stress and the contact length between chip and tool.