Lukianenko I. Specifics of production of two-layer castings made of in-mold modified cast irons

In the dissertation work the actual scientific and applied task is solved – scientific bases and technologies of manufacturing of two-layer cast iron castings for work in extreme conditions with application of inmold modification of one melt instead of labor-consuming traditional technology of production of the same castings with use of two melts of different chemical composition are developed. According to the results of studying the influence of carbon and silicon on the processes of structure formation in cast iron castings with different thickness of their sections for further research the chemical composition of cast irons were determined, prone to crystallization according to the metastable and stable diagram. The technological parameters of manufacturing two-layer cast iron castings using the technology of mold gradual pouring and using an external cast-iron chiller are established.