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← HistoryWhich outcome results from exceeding the critical cooling rate during cast iron production in ancient China?
A)Formation of white cast iron✓
B)Increased graphite nodule formation
C)Improved corrosion resistance appears
D)Higher silicon content distributes properly
💡 Explanation
Formation of cementite occurs because rapid cooling of the cast increases the rate of CARBIDE PRECIPITATION. Therefore, white cast iron appears, rather than grey cast iron with graphite, under slower cooling scenarios.
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