Production method for high-strength high-elongation spheroidal graphite cast iron

• Main Authors: ZHUANG SUDONG, FANG DUO, LIU XIAODONG, DU JIZHU, LIN XIANHUI, WANG ANJIA, JIANG AILONG, QIAO JINGUO
• Format: Patent
• Language: Chinese; English
• Published: 21.09.2016
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; METALLURGY OF IRON; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to the technical field of iron casting processes, in particular to a production method for high-strength high-elongation spheroidal graphite cast iron. The production method comprises the steps that S1, furnace materials are selected and comprise the main material and the auxiliary material, the main material is prepared by mass fraction and comprises 40%-60% of scrap steel and the balance pig iron, and the auxiliary material comprises silicon iron, ferromanganese and a recarburizer; S2, the furnace materials are put into an electric furnace to be melted into molten iron; S3, tapping is conducted, the interrupted front treatment is conducted on the molten iron, and alloy is added into the molten iron according to the component of the molten iron, so that the content of silicon in the processed molten iron is 3.0%-3.5%; and S4, the processed molten iron is subjected to spheroidizing treatment and inoculation treatment, specifically, a spheroidizing agent and an inoculant are packed to be