Study Of The Machinability Of Hardened 100cr6 Bearing Steel With Tin Coated Ceramic Inserts
Résumé: In present work behaviour of TiN coated ceramic tool was investigated considering the effect of workpiece material hardness and cutting parameters (cutting speed, feed rate, depth of cut and cutting time) during turning of hardened 100Cr6 bearing steel. The evolution of surface roughness (Rz), cutting forces and tool flank wear has been investigated according to the cutting parameters. Experimental results reveals that the feed rate, workpiece hardness and cutting speed have significant effects in reducing the surface roughness; whereas the higher cutting forces are required for machining harder work material. When tool flank wear (VBc) of TiN coated ceramic tool increases, cutting forces increase. The most dominating force component was the thrust force, followed by the tangential cutting force; the axial force was less sensitive to tool flank wear evolution. Finally, tool flank wear rate increase smoothly and the wear mechanism was probably abrasion and adhesion especially in case of harder workpiece
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