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| Wear Mechanism of Tool in High-speed Milling of Titanium Alloy TC6 |
| XU Jin-Yang, ZHENG Xiao-Hu, AN Qing-Long, CHEN Ming |
| (School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China) |
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Abstract The PVD and CVD coated carbide tools were adopted for highspeed milling of α+β phase titanium alloy TC6. Both the wear pattern and wear mechanism were investigated. The results show that PVD coated tool obtains smaller tool flank wear, longer tool life, and is more suitable for milling of titanium alloy TC6 compared with CVD coated tool under the same cutting condition. The rake face of PVD coated tool mainly suffers adhesive wear and oxidation wear while the flank face suffers border wear. Micro chipping is observed to be the main tool failure ascribed to the negative effects of adhesive wear and border wear on the main cutting edge. In contrast, the tool life of CVD coated tool is shorter; its rake face mainly suffers early microchipping and subsequent crater wear and adhesive wear while its flank face suffers abrasive wear. Coating peeling is confirmed to be the main tool failure for CVD coated tool.
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Received: 29 August 2011
Published: 30 July 2012
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