本實驗主要探討在不同的切削速度(30和60 m/min)，固定每刃進給0.12 mm/tooth、徑向和軸向切深3 mm進行切削Ti-6Al-4V鈦合金和Ti-10V-2Fe-3Al鈦合金，不同的切削速度將會對鈦合金材料之切削性質產生何種影響。實驗結果顯示以切削速度30和60 m/min切削Ti-6Al-4V和Ti-10V-2Fe-3Al鈦合金，在平行進給方向的表面粗糙度值都差異不大，在垂直進給方向的表面粗糙度值較差，原因為刀具路徑重疊以及刀具磨耗所致。在刀具磨耗的部分，由於主要磨耗位置為刀刃口處，因此將刀口處的磨耗量作為刀具壽命之依據，切削Ti-6Al-4V鈦合金的刀具壽命優於切削Ti-10V-2Fe-3Al鈦合金之刀具。並在磨耗結束後觀察切削對於材料組織的影響，發現Ti-6Al-4V鈦合金有產生塑性流的現象。爾後再以100 %徑向切深、切削速度60 m/min、軸向切深1 mm和每刃進給0.03、0.04及0.05 mm/tooth作為實驗參數進行切削擷取切削力，得到Ti-10V-2Fe-3Al鈦合金的切削力係數大於Ti-6Al-4V鈦合金的切削力係數。

This experiment by using the different velocity (30 and 60 m/min), the feed per tooth is fixed at 0.12 mm/tooth and the axial and the radial depth are 3 mm to cut Ti-6Al-4V and Ti-10V-2Fe-3Al alloys. How the machinability of alloys will be changed when using different cutting velocity. The result shows that use 30 and 60m/min to cut Ti-6Al-4V and Ti-10V-2Fe-3Al alloy, the values of surface roughness are similar in parallel feed rate direction. When we observe that the direction of roughness perpendicular to the feed rate, we get the worse surface roughness. Because the tool wear gets worse and the tool paths are repeat. In the part of tool wear, the mainly wear location is tool edge, so we will define the tool life by the flank wear around the tool edge. Experimental results reveal that the tool life of cutting Ti-6Al-4V alloy are better than Ti-10V-2Fe-3Al alloy. When the end of the experiment, the phase diagram shows that it has the plastic flow when cutting Ti-6Al-4V alloy. And then we use the 100% of the tool diameter, 60 m/min of the cutting speed, 1 mm of the cutting depth and the feed per tooth are 0.03, 0.04 and 0.05 mm/tooth to cut the titanium alloys and get the cutting force. After calculating, the results show that the cutting force coefficient of Ti-10V-2Fe-3Al is higher than the Ti-6Al-4V.

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