Carbide Tool Powdered Cr3 C2 or WO3 Advantages

The results demonstrate that the conventional cemented carbide cutting tools in accordance with the carbide cutting tool powdered Cr3 C2 or WO3 have superior chipping resistance under high-cutting depth conditions of an end mill used in an intermittent cutting mode due to the presence of ultra-fine particles composed of a Co-based alloy having a particle diameter of 100 nm or less dispersed in a dispersing phase and due to a finer and more homogeneous distribution of the binding phase which is evaluated by a relatively low thermal conductivity. In contrast, the conventional cemented carbide cutting tools have relatively short service lives due to low chipping resistance, although the hardness, the Co and Cr contents, the rate of the dispersing phase, and the average particle diameter are substantially the same as those in the cemented carbide cutting tools of the present invention.

As described above, the cemented carbide cutting tool powdered Cr3 C2 or WO3 has high chipping resistance and has superior cutting characteristics without chipping of the cutting edge for long periods under intermittent heavy cutting conditions such as at a high feed rate or a high cutting depth, in addition to continuous cutting conditions. Thus, the tool satisfactorily contributes to labor and energy saving in cutting operations.

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