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垂直上引连续铸造的铸铁空心型材,从其凝固结晶的机理上杜绝了传统铸造难以避免的气孔、砂眼、夹渣、缩松等缺陷,又因冷却速度极大而获得了细密的铸态组织,其共晶团体积仅有传统铸件的1/8～1/10,而晶界面积增加了4倍以上。这些特征致使连铸型材具有“高致密、零缺陷、强韧兼备”之特点,并使其抗磨损性能显著提高。运用连续铸造的球铁空心型材制作的氮氢气压缩机第5级气缸套,与离心铸管制造的缸套的对比试验结果表明,使用寿命提高了一倍以上。
Vertical cast continuous casting of hollow cast iron castings from its solidification mechanism to eliminate the traditional casting is difficult to avoid stomatal, trachoma, slag, shrinkage and other defects, but also because of the cooling rate was extremely large and obtained as-cast structure , Its eutectic volume is only 1/8 ~ 1/10 of the traditional castings, and the grain boundary area increased more than 4 times. These features have led to continuous casting profiles with “high density, zero defect, both tough and strong” and make it significantly improved wear resistance. The use of continuous casting of hollow iron profiles made of nitrogen and hydrogen compressor cylinder liner level 5, and centrifugal casting pipe liner manufacturing test results show that the service life more than doubled.