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对同炉浇铸但抗拉强度有较大差异的试棒进行了金相组织、抗拉强度和化学成分的对比分析.结果表明,在化学成分一致的情况下,造成性能差异的主要原因是石墨长度和共晶团的细化程度.
The comparative analysis of the microstructure, tensile strength and chemical composition of the test bars cast in the same furnace with great difference in tensile strength shows that the main reason for the difference in performance under the same chemical composition is graphite Length and degree of refinement of eutectic groups.