Mechanics, Materials Science & Engineering, July 2017 – ISSN 2412-5954
Microcapillary Features in Silicon Alloyed High-Strength Cast Iron1 R.K. Hasanli1,a, S.N. Namazov2,b 1 – Associated professor, Dr., Azerbaijan Technical University, Baku, Azerbaijan 2 – Professor, Dr., Azerbaijan Technical University, Baku, Azerbaijan a – hasanli_dr@mail.ru b – subhan_namazov@daad-alumni.de DOI 10.2412/mmse.89.99.501 provided by Seo4U.link
Keywords: alloyed, high-strength cast iron, metal form, segregation, structure.
ABSTRACT. Present study explores features of silicon micro capillary in alloyed high-strength cast iron with nodular graphite (ductile iron) produced in metal molds. It identified the nature and mechanism of micro liquation of silicon in a ductile iron alloyed with Nickel and copper, and demonstrated significant change of structural-quality characteristics. It was concluded that the matrix of alloyed ductile iron has a heterogeneous structure with cross reinforcement and highsilicon excrement areas.
Introduction. High quality of iron castings depends largely on the structure and properties, including the nature of the distribution of silicon. However, the structure of high-strength cast iron with nodular graphite (ductile iron) produced in the metallic form, and the nature of silicon micro liquation in it has not been studied. Therefore, research in this direction represents both scientific and practical interest. Analyses of the Microcapillary Features in Silicon Alloyed High-Strength Cast Irons. Method of etching in an alkaline solution of sodium picrate was used to study microrespirometry of silicon in cast iron. The study of micro liquation of silicon in ductile iron, cast in the mold, showed that there is a significant difference from micro liquation in ductile iron, cast in sand form. Analysis of ductile iron chill in the cast state showed that the iron acquires the structure of a white cast iron consisting of perlite and ledeburite (Fig.1).
Fig. 1. The microstructure of unalloyed ductile iron, x300. 1
© 2017 The Authors. Published by Magnolithe GmbH. This is an open access article under the CC BY-NC-ND license http://creativecommons.org/licenses/by-nc-nd/4.0/