Cutting force, tool wear and surface roughness in high-speed milling of high-strength steel with coated tools
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The TiAlN+TiN coated tool, AlTiN coated tool and TiN/TiCN/TiAlN multi-coated tool were chosen for the high-speed milling of AISI 4340. The resultant cutting force and tool wear of coated tools were reviewed. The influence of cutting parameters and coating materials on the machined surface roughness was studied. The smallest resultant cutting force was obtained by TiN/TiCN/TiAlN multicoated tool. The main wear mechanisms of coated tool were chipping, collapse, the chipping of coating, adhesive wear, abrasive wear and crater wear. The minimal flank wear width was obtained by TiN/TiCN/TiAlN multi-coated tool. Among the selected cutting parameters, the lower surface roughness Ra of 0.08≈0.32 μm was achieved by the TiN/TiCN/TiAlN multi-coated tool and TiAlN+TiN coated tool. This work was conducive to the selection of coated tools and the optimization of cutting parameters in high-speed milling of AISI 4340, as well as to the promotion of high-efficiency and high-quality machining of hard-to-cut material.
KeywordsCoated tool Cutting force Surface roughness Tool wear
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This work was supported by the National Key Research and Development Program of China (No. 2018YFB2001400), the Project funded by China Postdoctoral Science Foundation (No. 2019M652439), the National Natural Science Foundation of China (51505264), the Zibo city-Shandong University of Technology Cooperative Projects (2018ZBXC003), and the National Natural Science Foundation of Shandong province (ZR2017MEE060). Thanks to Ms. Xiaojuan Liu for her guidance.
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