Assessment of wear micromechanisms on a laser textured cemented carbide tool during abrasive-like machining by FIB/FESEM  

作　　者：Shiqi FANG Dirk BÄHRE Luis LLANES 

机构地区：[1]Institute of Production Engineering,Saarland University,Saarbrücken 66123,Germany [2]CIEFMA-Department of Materials Science and Engineering,EEBE-Campus Diagonal Besòs,Universitat Politècnica de Catalunya,Barcelona 08019,Spain

出　　处：《Friction》2021年第3期656-664,共9页摩擦（英文版）

基　　金：supported by the German Research Foundation(DFG)within the Individual Research Grant(425923019)“Laser Surface Textured Cemented Carbides for Application in Abrasive Machining Processes”.

摘　　要：The combined use of focused ion beam(FIB)milling and field-emission scanning electron microscopy inspection(FESEM)is a unique and successful approach for assessment of near-surface phenomena at specific and selected locations.In this study,a FIB/FESEM dual-beam platform was implemented to docment and analyze the wear micromechanisms on a laser-surface textured(LST)hardmetal(HM)tool.In particular,changes in surface and microstructural integrity of the laser-sculptured pyramids(effective cutting microfeatures)were characterized after testing the LST-HM tool against a steel workpiece in a workbench designed to simulate an external honing process.It was demonstrated that:(1)laser-surface texturing does not degrade the intrinsic surface integrity and tool effectiveness of HM pyramids;and(2)there exists a correlation between the wear and loading of shaped pyramids at the local level.Hence,the enhanced performance of the laser-textured tool should consider the pyramid geometry aspects rather than the microstructure assemblage of the HM grade used,at least for attempted abrasive applications.

关 键 词：focused ion beam(FIB) field-emission scanning electron microscopy inspection(FESEM) cemented carbides laser surface texturing abrasive machining processes WEAR 

分 类 号：TG580.67[金属学及工艺—金属切削加工及机床]