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采用自蔓延高温合成铝热离心法在球墨铸铁管内表面涂覆Ａｌ２Ｏ３陶瓷层获成功。陶瓷层由Ａｌ２Ｏ３、ＦｅＯ·Ａｌ２Ｏ３、３Ａｌ２Ｏ３·２ＳｉＯ２等组成，硬度达ＨＶ１３２６～１５５８。中间过渡层与球铁基体冶金熔合，与陶瓷层机械结合牢固。复合管综合性能大幅提高。
The successful application of Al2O3 ceramic coating on the inner surface of ductile iron pipe by self-propagating high-temperature synthetic aluminum thermal centrifugation was successful. The ceramic layer is composed of Al2O3, FeO · Al2O3, 3Al2O3 · 2SiO2 and the like and has a hardness of HV1326 to 1558. Intermediate transition layer and the ductile iron metallurgical fusion, mechanical and ceramic layer firmly combined. Comprehensive performance of composite pipe increased significantly.