Abstract
Existence of carbon fibers in Cf/Mg composites resulted cutting tools to be worn rapidly by the contact and relative sliding between tools and workpiece during cutting operations. In order to investigate tool wear in the cutting operations of Cf/Mg composites, carbide tool and polycrystalline diamond (PCD) tool were used to machine the Cf/Mg composites by dry cutting, and tool wear morphologies were observed and analyzed. The experimental results showed that there was a lot of workpiece material stagnation zone in front of the cutting edge due to fracture-based chip formation of the Cf/Mg composites. The wear morphologies of carbide tool was corner wear in the cutting edge maximum slant, in which wear mechanisms were mainly abrasive wear, adhesion wear, and microbreakage. The wear of carbide tool was fast, and its tool life was 40~50 min. The wear morphologies of PCD tool were microbreakage in the edge of the blade, adhesion wear, and abrasive wear, and the wear of PCD tool was in a lower level and its tool life was longer than that of carbide tool.
Published Version
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