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Tool wear
Due to friction, high temperature, and oxidation, matrix materials (such as hard alloys and high-speed steel) wear out rapidly
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Low processing efficiency
The speed and feed rate of milling can affect efficiency, for example, if the speed is too high, it may shorten the tool life and instead reduce overall efficiency
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Unstable accuracy and surface quality
Intermittent cutting, periodic changes in cutting force can easily cause vibration
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High cutting force
High strength materials such as 7-series aluminum alloys and titanium alloys require extremely high cutting forces, which can easily cause tool breakage