Wear Mechanism of Chemical Vapor Deposition (CVD) Carbide Insert in Orthogonal Cutting Ti-6Al-4V ELI at High Cutting Speed

• Main Authors: Gusri, A. I., Che Hassan, C. H., Jaharah, A. G.
• Format: Conference Proceeding
• Language: English
• Subjects: ABRASIVES; ADHESION; ADHESIVES; ALLOYS; ALUMINIUM COMPOUNDS; ALUMINIUM OXIDES; CARBIDES; CARBON COMPOUNDS; CHALCOGENIDES; CHEMICAL COATING; CHEMICAL VAPOR DEPOSITION; COATINGS; CUTTING; CYANIDES; DEPOSITION; DIFFUSION; ELEMENTS; FABRICATION; FAILURES; FRACTURES; INTERFACES; JOINING; LAYERS; MACHINING; MATERIALS SCIENCE; METALS; NITRIDES; NITROGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PNICTIDES; REMOVAL; SURFACE COATING; TIN; TITANIUM ALLOYS; TITANIUM COMPOUNDS; TITANIUM NITRIDES; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENT COMPOUNDS; VELOCITY; WELDING
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/1.3552333

The performance of Chemical Vapor Deposition (CVD) carbide insert with ISO designation of CCMT 12 04 04 LF, when turning titanium alloys was investigated. There were four layers of coating materials for this insert i.e.TiN-Al2O3-TiCN-TiN. The insert performance was evaluated based on the insert's edge resistant towards the machining parameters used at high cutting speed range of machining Ti-6Al-4V ELI. Detailed study on the wear mechanism at the cutting edge of CVD carbide tools was carried out at cutting speed of 55-95 m/min, feed rate of 0.15-0.35 mm/rev and depth of cut of 0.10-0.20 mm. Wear mechanisms such as abrasive and adhesive were observed on the flank face. Crater wear due to diffusion was also observed on the rake race. The abrasive wear occurred more at nose radius and the fracture on tool were found at the feed rate of 0.35 mm/rev and the depth of cut of 0.20 mm. The adhesion wear takes place after the removal of the coating or coating delaminating. Therefore, adhesion or welding of titanium alloy onto the flank and rake faces demonstrates a strong bond at the workpiece-tool interface.