切削过程中涂层剥落是造成刀具损坏的主要原因。
The breaking_off of coating during cutting is the main reason for tool damage.
切削过程中金属层流过剪切区发生塑性变形后形成切屑。
During metal cutting, the metal plastic deformation occurred on shearing plane zone.
金属切削过程中，不同的切削参数对零件的加工精度影响是不同的。
Different cutting parameters may have different influences on machining accuracy in metal cutting process.
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