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← HistoryWhich material characteristic improvement results when rapidly chilling crucible-cast crucible steel?
A)Reduced carbide precipitation along grain✓
B)Increased ferrite grain boundary slip
C)Higher pearlite formation rate overall
D)Suppressed martensite hardness tempering ability
💡 Explanation
Rapid chilling causes reduced carbide precipitation along grain boundaries because it impedes carbon diffusion; therefore, it diminishes brittleness effects by dislocation hindrance rather than promoting boundary slip expected during slower cooling from annealing.
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