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白斑是离心铸造厚壁铸铁缸套的一种异常组织。本文以机车汽室套为例,通过化学成分、显微组织、硬度和电子显微镜微区成分分析以及生产统计资料,研究了白斑的显微组织特点,探讨了白斑组织的形成机理,并提出了解决白斑缺陷的工艺措施。
White spot is an abnormal structure of centrifugal casting thick-walled cast iron cylinder liner. In this paper, a locomotive steam chamber sleeve is taken as an example to study the microstructure characteristics of the white spot by chemical composition, microstructure, hardness and electron microscopic composition analysis and production statistics, and to discuss the formation mechanism of the white spot tissue Solve the white spot defect process measures.