The characters, development and process of Vermicular Graphite Cast Iron (VGCI) were discussed, and then the main reason of diesel locomotive VGCI cylinder head leakage was analyzed.

• 本文介绍了蠕墨铸铁的特征、发展历程和生产工艺,分析了内燃机车蠕墨铸铁汽缸盖渗漏的主要原因。