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← TechnologyWhich risk increases when high-throughput forging lacks automated die lubrication?
A)Increased sticking and galling✓
B)Reduced material grain alignment
C)Decreased overall structural hardness
D)Elevated ductile to brittle transition
💡 Explanation
Increased sticking and galling emerges when forging lacks die lubrication because the mechanism of adhesive wear escalates due to direct metal-to-metal contact under immense pressure. Therefore, surface damage is more likely, rather than improved grain alignment or decreased hardness that require different thermal or mechanical processes.
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