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← TechnologyWhich tolerance deviation results when grinding hardened steel punches without adequate Flood Cooling?
A)Increased surface micro-cracking risk
B)Material phase transformation hardening
C)Elevated final surface stresses
D)Dimensional shift due to thermal expansion✓
💡 Explanation
High local temperatures during grinding induce thermal expansion, a thermo-mechanical deformation process; therefore, dimensions shift rather than causing cracking, because adequate Flood Cooling would normally curtail the bulk metal temperature increases, leading to higher overall tolerance.
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