Abstract
Sintered WC tools are known to be effective and economical cutting tool for titanium alloy. Carbide tools with various grain size, content of WC and side rake angle were tested to evaluate the cutting performance-tool wear, cutting force and finished surface-in machining of commercial pure titanium. The wear resistance of the tools changes with the grain size of WC, in such a way that the tool with 1μm WC grain is the best. The wear of the tool with 94wt% WC is the smallest among the composition range of WC between 93 and 97wt% under the grain diameter of WC fixed to about 1μm. The tool wear progresses slowly and the level of cutting force is low for the tools with pressed chip breaker, regardless of WC content. An excellent cutting performance is found to be obtainable with the tool which has a side rake angle between -π/39 and π/36 rad.
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