Marine large-diameter cylinder liner casting method

This present invention relates to the method of casting vat sheath which is used by ship. It comprises the steps of making core, closing, melting, taphole, casting, cast clearing, cast gruff processing, anneal, detecting. Its character is that there is an irrigating core on the casting model, on which fix a seat which has taphole which is tucked. The melting comprises the steps of putting the abandoned steel 38-42wt%, neonatal iron 20-40wt%, returned charging 20-40wt% into furnace. The highest melting temperature is 1500-1520Deg.c. The time of heat preservation is 5-10 min. Lower to feasible temperature. This present invention has the virtues of uncomplicated method and enough material supply.