Nucleation and graphite growth in nodular cast iron – an overeview

Scientific paper - Review paper

• Author: Barbara Tubić Bulat
• Author: Zdenka Zovko Brodarac
• Author: Primož Mrvar
• Editor: Natalija Dolić
• Editor: Zdenka Zovko Brodarac
• Editor: Sandra Brajčinović
• Author's institution: University of Zagreb; Faculty of Metallurgy; (Department of Process Metallurgy); (Laboratory of Iron, Steel and Founding)
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Metallurgy; Process Metallurgy

Abstract (english)

The term nodular iron cast refers to a group of iron alloys with a maximum carbon content of 4 wt. % and silicon from 1.7 wt. % to 2.8 wt. %. This type of cast iron is characterized by the presence of carbon in the spherical or nodular form of graphite in a ferrite, pearlite or ferrite-pearlite matrix. Due to its better mechanical properties in relation to the other iron cast groups, it is widely used in production of gearboxes, crankshafts, turbine rotors, tanks, transportation industries, etc. Generally, size, distribution and shape of graphite nodules ensure a good toughness, high value of elongation and yield strength, castability and machinability. The course of solidification and each parameter of the production and solidification process has a certain impact on the mechanical properties and microstructure of the final product. However, solidification and graphite growth mechanisms in nodular cast iron have not been fully explained in despite to a large amount of research on the subject. Different experiments have led to the creation of different theories about the solidification process which aim to enable the creation of models for predicting the solidification process and the growth of graphite nodules. Predicting the development of microstructure and defining optimal parameters of the production process could prevent casting and microstructural defects thus ensuring desired properties of the casting. This paper provides an overview of several studies regarding the nucleation and graphite growth mechanism theories and experiments.

• Keywords (english): casting, nodular iron, solidification, nucleation, graphite growth, overview
• Language: english
• Publication type: Scientific paper - Review paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Publication title: Proceedings book of 19th International Foundrymen Conference
• Numbering: pp. 226-236
• ISBN: 978-953-7082-39-0
• URN:NBN: urn:nbn:hr:115:387268
• Publication: 2021
• Project: Number: KK.01.1.1.02.0020; Title (croatian): Centar za ljevarstvo - SIMET; Title (english): Center for casting - SIMET; Acronym: SIMET; Leader: Zdenka Zovko Brodarac; Jurisdiction: Croatia; Funding stream: European Regional Development Fund
• Project: Number: KK.01.1.1.02.0022; Title (croatian): Virtulab – Integrirani laboratorij za primarne i sekundarne sirovine; Acronym: Virtulab; Leader: Sibila Borojević Šoštarić; Zdenka Zovko Brodarac (MF); Jurisdiction: Croatia; Funding stream: European Regional Development Fund
• Conference: Title: 19th INTERNATIONAL FOUNDRYMEN CONFERENCE Humans - Valuable Resource for Foundry Industry Development; Acronym: IFC; Location: Split, Croatia; Organizer: University of Zagreb Faculty of Metallurgy; Start date: 2021-06-16; End date: 2021-06-18; Assembly type: Lecture
• Document URL: https://ifc.simet.hr/wp-content/uploads/2021/07/PROCEEDINGS-BOOK_19IFC_2021_compressed.pdf
• Type of resource: Text
• Publisher: University of Zagreb Faculty of Metallurgy
• Publishing place: Sisak, Hrvatska
• Access conditions: Open access
• Created on: 2024-05-03 16:29:17