LAPSE:2018.0274
Published Article
LAPSE:2018.0274
Selected Phenomena of the In-Mold Nodularization Process of Cast Iron That Influence the Quality of Cast Machine Parts
Marcin Stawarz, Krzysztof Janerka, Malwina Dojka
July 31, 2018
This paper discusses a problem connected with the production process of ductile iron castings made using the in-mold method. The study results are presented showing that this method compromises the quality of the cast machine parts and of the equipment itself. Specifics of the nodularization process using the in-mold method do not provide the proper conditions for removal of chemical reaction products to the slag, i.e., the products stay in the mold cavity and they also decrease the quality of the casting. In this work, corrosion-type defects were diagnosed mostly on the surface of the casting and some compounds in the near-surface layer—i.e., fayalite (Fe₂SiO₄) and forsterite (Mg₂SiO₄)—which cause discontinuities in the metal matrix. The results presented here were selected based on experimental melts of ductile iron. The elements of the mold used in this study, the shape of the mixing chamber, charge materials, method of melting, temperature of liquid metal, etc. were directly related to the production conditions. An analysis was conducted of the chemical composition using a Leco GDS500A spectrometer and a carbon and sulfur Leco CS125 analyzer. Metallographic examinations were conducted using a Phenom-ProX scanning electron microscope with an EDS system.
Keywords
ductile iron, fayalite, forsterite, in-mold process, sulfides
Subject
Suggested Citation
Stawarz M, Janerka K, Dojka M. Selected Phenomena of the In-Mold Nodularization Process of Cast Iron That Influence the Quality of Cast Machine Parts. (2018). LAPSE:2018.0274
Author Affiliations
Stawarz M: Department of Foundry Engineering, Silesian University of Technology, Towarowa 7 str., 44-100 Gliwice, Poland [ORCID]
Janerka K: Department of Foundry Engineering, Silesian University of Technology, Towarowa 7 str., 44-100 Gliwice, Poland
Dojka M: Department of Foundry Engineering, Silesian University of Technology, Towarowa 7 str., 44-100 Gliwice, Poland
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Journal Name
Processes
Volume
5
Issue
4
Article Number
E68
Year
2017
Publication Date
2017-11-06
Published Version
ISSN
2227-9717
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Original Submission
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PII: pr5040068, Publication Type: Journal Article
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LAPSE:2018.0274
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doi:10.3390/pr5040068
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Jul 31, 2018
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