3517 Oxygen Enriched Machining of Titanium Alloys
Details
This study aims to improve tool life by the use of high oxygen atmosphere for the reduction of adhesion by generation of oxide. Titanium alloys (Ti-6Al-4V, Ti-3Al-8V-6Cr-4Mo-4Zr) and several kinds of coated carbide end mills were used in this experiment, and the effect of cutting atmosphere on tool wear were investigated by side cutting under the dry cutting condition. The results were obtained as follows; 1) The tool wear decreases by high oxygen when the oxygen enriched machining is done under the high-speed interrupted cutting condition in machining Ti-3Al-8V-6Cr-4Mo-4Zr, and the optimal value exists in the oxygen content according to the coating material. 2) The decrease of tool wear is observed as for each coated tool under the high oxygen condition, and it almost becomes constant in 28% or more oxygen content in the machining of Ti-6Al-4V. Moreover, a wear decrease in the TiBON coating is the largest.
