Patent ID: 11920205
Assignee: nan
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. A semi-solidification casting method for casting a spheroidal graphite cast iron cast product, comprising;
a melting step in which a raw material made of cast iron is heated and melted to obtain a molten metal,
a spheroidizing treatment step of spheroidizing the molten metal,
an inoculation step of inoculating the molten metal, and
a casting step of pouring the molten metal after inoculation from a pouring port, passing through a runner, and filling a product space through a gate,, wherein the amount of nitrogen in the molten metal is adjusted so that the amount of nitrogen generated during melting of the casting is 0.9 mass ppm or less,, the pouring being performed at a temperature between liquidus temperature +10° C. and (liquidus line temperature +40° C.), and, the molten metal poured from the pouring port is cooled in the runner and introduced into the product space through the gate in a solid-liquid coexistence state.