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How does cast iron resist crazing?
Cast iron’s resistance to crazing—a network of fine cracks caused by thermal or mechanical stress—stems from its distinctive microstructure. The material contains graphite flakes embedded in a ferrous matrix, which act as natural stress relievers. When subjected to thermal shock or mechanical strain, these flakes absorb and redistribute stress, preventing concentrated fractures. Additionally, cast iron’s high carbon content enhances its ability to withstand rapid temperature changes without cracking. The combination of graphite dispersion and a robust matrix makes cast iron exceptionally durable against crazing, even in demanding industrial applications. Proper heat treatment further refines its grain structure, optimizing crack resistance.
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