Abstract: In this paper diffusion wear
in milling of titanium alloys has been investigated. At high
speed milling, tool wear is mainly caused by diffusion. The wear
pattern is characterized by the combined action of the extension
of the cratering wear on the rake face and the glacien wear on
the flank. The evidence of diffusion of cobalt and carbon at the
interface between the milling cutter and the workpiece has been
obtained. It was demonstrated for the first time that a rich
carbon layer was formed at the tool / work interface and poor
carbon layer was found in a sub-surface layer under the tool
flank as the diffusion wear took place. Wear occurred due to
brittleness and weakening in the surface layer can be fully
explained by the above mentioned reasons.
Key words:
Titanium alloy Milling Tool wear Diffusion wear
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