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← TechnologyWhich distortion risk increases when machining hardened steel on a lathe without adequate stress relieving?
A)Workpiece-induced thermal ratchet✓
B)Amplified material-grain oxidation
C)Spindle bearing stochastic resonance
D)Excessive tool-path interpolation error
💡 Explanation
Internal stresses in hardened steel, if not relieved prior to lathe machining, can lead to thermal ratchet because the cutting process introduces localized heat that causes differential thermal expansion and plastic deformation. Therefore, thermal ratchet leads to unpredictable distortions rather than oxidation or tool path errors.
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