FEATURES OF SPHEROIDIZING MODIFICATION OF HIGH-STRENGTH CAST IRON WITH MASTER ALLOYS BASED ON COPPER

• Main Authors: A. S. Kalinichenko, A. G. Slutsky, V. A. Sheinert, R. E. Trubitsky, V. A. Stefanovich, V. A. Smyеtkin
• Format: Article
• Language: English
• Published: Belarusian National Technical University 2016-08-01
• Series: Litʹë i Metallurgiâ
• Subjects: high-strength cast iron; spheroidizing; copper-magnesium alloying alloys; «chips-inoculating alloy»
• Online Access: https://lim.bntu.by/jour/article/view/1186

The increase of efficiency of modification process for ductile iron is topically, thereby increasing its mechanical and operational properties. For these purposes, in practice, various magnesium containing alloys are used, including «heavy» ones on the basis of Copper and Nickel. The analysis has shown that the application of bulk inoculating alloys based on copper basis were not effectively due to long dissolution period. From this point of view, the interest is high-speed casting, allowing the production of inoculating alloys in the form of strips – chips that are characterized by a low dissolution time and low piroeffekt. The aim of this work is to study the features of structure formation in nodular cast iron using different spheroidizing alloys based on copper. Studies have shown that the transition from the use of briquetted form alloys based on copper and magnesium to the «chips-inoculating alloys» allowed increasing the efficiency of the spheroidizing process. Further improvement in the quality of ductile iron can be achieved by the use in «chip-inoculating alloys» additives of nanosized yttrium oxide powder.