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← TechnologyWhen grinding hardened steel components in coolant, which risk increases significantly due to high stock removal rates?
A)Thermal cracking becomes commonplace✓
B)The surface finish improves drastically
C)Material hardness decreases noticeably
D)Coolant viscosity drops exponentially
💡 Explanation
Thermal cracking risk increases significantly because rapid stock removal concentrates friction, thus exceeding the steel's thermal shock resistance via thermal stress. Therefore, cracking is more likely rather than improved finish, as heat intensifies rapidly at removal.
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