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系统研究了Ｍｎ对水平连铸低铬白口铸铁铸态及正火态组织和硬度的影响。结果表明，Ｍｎ＞２．０％之后对组织有较大影响，由于出现（Ｍ＋Ａ）组成物，使基体硬度显著提高，这将大大改善了低铬白口铸铁中碳化物与基体硬度的相对关系。试验证实，Ｍｎ＞３％之后明显改善硬度分布均匀性。还讨论了使低铬锰白口铸铁具有最佳综合性能的合理含Ｍｎ量范围
The effect of Mn on the as-cast and normalized microstructure and hardness of low-grade white cast iron with continuous casting was systematically investigated. The results showed that Mn> 2.0% had a significant effect on the microstructure. The (M + A) composition resulted in a significant increase in the hardness of the matrix, which would greatly improve the relative relationship between carbide and matrix hardness in low chromium white cast iron . Experiments confirmed that Mn> 3% significantly improved hardness distribution uniformity. Also discussed is a reasonable Mn content range that maximizes the overall performance of low chromium manganese white cast iron