Acta Metall Sin  1998, Vol. 34 Issue (9): 971-976    DOI:

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GRAPHITE NODULAR PHENOMENA DURING THE ESR OF CAST IRON

CHU Shaojun; LIU Haihong; ZHANG Heyi (Metallurgical Engineering College;University of Science and Technology Beijing; Beijing 100083)Correspondent: CHU Shaojun; associate professor; Tel: (010)62332790; Fax: (010)62522845

CHU Shaojun; LIU Haihong; ZHANG Heyi (Metallurgical Engineering College;University of Science and Technology Beijing; Beijing 100083)Correspondent: CHU Shaojun; associate professor; Tel: (010)62332790; Fax: (010)62522845. GRAPHITE NODULAR PHENOMENA DURING THE ESR OF CAST IRON. Acta Metall Sin, 1998, 34(9): 971-976.

Abstract References Related Articles Recommended Metrics Download:  PDF(1090KB)  Export:  BibTeX | EndNote (RIS)       Abstract  Based on the principles of the electrochemical modifying treatment for molten cast iron, preparing ductile iron in ESR process tinder D.C. condition without adding spheroidizing inoculant alloys has been studied in laboratory. The key operation of ESR for producing ductile iron is to increase the silicon content of consumable grey iron electrode and use CaF2-based slags containing rare-earth chide or alkaline-earth oxide and magenisium fluoride. Under the condition of D.C. reversed polarity, the anodic corrosion reaction silicon at the consumable electrode tip leads to a decrease of ferrous oxide concentrationin molten slag, therefore, the cathodic reduction of magnesium canon or cerium cation at the interface between slag and metal pool happens easily.A small amout of nodulizing element such as Mg and Ce, being transferred from slag into metal pool make graphite spheroidizing in remelted ingot. This new method of producing ductile iron in ESR process seems to be useful for the development of new metallurgical technology. Key words:  nodular cast iron      electroslag remelting      electrochemical      Received:  18 September 1998      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1998/V34/I9/971 11981; 548(Paton E O. 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