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← HistoryWithin early Chinese ironcasting, which limit decreased yield?
A)Lower silicon levels dissolving graphite✓
B)Decreased crucible temperature increasing cooling
C)Increased phosphorus content enabling fluidity
D)Faster mold filling preventing oxidation
💡 Explanation
Lower silicon caused increased cementite formation via graphitization suppression, weakening sections because silicon controls cast iron properties during cooling; therefore lower silicon is a process failure, rather than phosphorus which aids fluidity.
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