METHOD FOR MANUFACTURING MOLD CASTING OF SPHERICAL GRAPHICAL CAST Iron HAVING ULTRAL FINE SPRINT GRAPHICE AND DIE CASTING OF SPRAYED Graphite Cast Iron

摘要

3000 spheroidized graphite / mm in as-cast state²Or more, and a spheroidal graphite cast iron. A spherical graphite cast iron mold having a melting step of melting raw materials made of cast iron to obtain hot water, a spheroidizing treatment step of performing spheroidizing treatment, an inoculation step of performing inoculation, and a casting step of casting in a mold A method for producing a cast product, comprising: adjusting the amount of nitrogen so that the amount of nitrogen produced at the time of melting of the mold cast product is 0.9 ppm (mass) or less; and a mold casting of ultrafine spheroidal graphite cast iron .