Study on micro texturing of uncoated cemented carbide cutting tools for wear improvement and built-up edge stabilisation

  • Author:

    J. Kümmel, D. Braun, J. Gibmeier, J. Schneider, C. Greiner, V. Schulze, A. Wanner

  • Source:

    Journal of Materials Processing Technology, 215 (2015), 62-70

  • During dry straight turning of plain carbon steel SAE 1045 with uncoated cemented carbide cutting toolsin the cutting velocity regime 50 m/min?150 m/min wear is characterised by crater wear, flank wearand corner radius wear. In the low cutting velocity regime built-up edge (BUE) formation and built-uplayers are visible. The BUE structures are instable in the cutting process and lead to a detoriation of theworkpiece surface. Previous examinations revealed a local wear protecting effect of BUE with respect tothe rake face, flank face and corner radius of the cutting tool (Kümmel et al., 2014). Laser surface texturingwas applied to texture the rake face of the cutting tool with different textures (dimples and channels) toallow for changing the adhesion tendency of BUE on the cutting tool. By applying a dimple texture on therake face the BUE could be best stabilised with respect to the untextured cemented carbide cutting tools.This is accompanied with a better wear behaviour compared to the untextured cutting tool with respectto corner radius wear. Contrary, channel textures destabilised BUE, while the wear of the cutting tool isincreasing. The results clearly indicate that the adhesion of workpiece material on the rake face can bemodified with respect to an untextured cemented carbide cutting tool in the dry metal cutting processby applying specific textures produced by laser texturing.