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Growth of Tool Wear as Function of Time

Cutting tool ...

Question

Cutting tool is much harder than the workpiece. Yet the tool wears out during the tool-work interaction, because

A

extra hardness is imparted to the workpiece due to coolant used

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B

oxide layers on the workpiece surface impart extra hardness to it

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C

extra hardness is imparted to the workpiece due to severe rate of strain

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D

vibration of induced in the machine tool

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Solution

The correct option is C extra hardness is imparted to the workpiece due to severe rate of strain
Cutting tool is much harder than the workpiece. Yet the tool wears out during the tool-work interaction, because extra hardness is imparted to the workpiece due to severe rate of strain.

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