IMPLEMENTATION OF CORED WIRE TECHNOLOGY INTO PRODUCTION OF DUCTILE IRON FOR CASTINGS DESIGNATED FOR EXTREME CONDITIONS

1 SOCHA Ladislav
Co-authors:
1 GRYC Karel 1 KOZA Kamil 1 SVIŽELOVÁ Jana 2 CHMIEL Miroslav 2 FRONKOVÁ Petra
Institutions:
1 Institute of Technology and Business in České Budějovice, České Budějovice, Czech Republic, EU, socha@mail.vstecb.cz, gryc@mail.vstecb.cz, kamil.koza@mail.vstecb.cz, svizelova@mail.vstecb.cz
2 KOVOSVIT MAS Foundry, a.s., Sezimovo Ústí, Czech Republic, EU, chmiel@kovosvit.czfronkova@kovosvit.cz
Conference:
31st International Conference on Metallurgy and Materials, Orea Congress Hotel Brno, Czech Republic, EU, May 18 - 19, 2022
Proceedings:
Proceedings 31st International Conference on Metallurgy and Materials
Pages:
134-141
ISBN:
978-80-88365-06-8
ISSN:
2694-9296
Published:
30th June 2022
Proceedings of the conference have been sent to Web of Science and Scopus for evaluation and potential indexing.
Metrics:
32 views / 14 downloads
Abstract

Presented paper deals with the technology of production of ductile iron on industrial scale. Particularly, the material in question is EN-GJS-400-18-LT, which is suitable for castings intended for extreme conditions. Drawing on previous works, most attention has been paid to the implementation of the cored wire technology for modification and primary inoculation. Two technological options were compared, namely modification and primary inoculation by the pour method in the ladle and modification and primary inoculation by the cored wire using a twin-core feeder. Test samples within the inlet system of the moulds were cast during the pouring process to analyse the chemical composition, evaluate the microstructure and perform mechanical tests without interfering with the casting itself. The chemical composition was determined by optical emission spectrometry and combustion analysis. Metallographic analysis and microstructure evaluation were performed by optical microscopy and image analysis. Mechanical properties testing was focused on tensile test, impact test and hardness test. It was demonstrated that the foundry is capable of producing ductile iron of the required quality with the adoption of modern cored wire technology.

Keywords: Metallurgy, ductile iron, cored wire, inoculation, modification

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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