Metallurgy and Technology of Steel Castings

by

Jan Głownia

DOI: 10.2174/97816810857081170101
eISBN: 978-1-68108-570-8, 2017
ISBN: 978-1-68108-571-5





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Gases and Non-Metallic Inclusions in Steel Castings

- Pp. 53-91 (39)

Jan Głownia

Abstract

Gases constitute a number of threats to the good quality of steel castings. Therefore, changes in the solubility of oxygen, nitrogen and hydrogen during solidification and defects, caused by rapid reduction of solubility in the liquidus temperature: microshrinkage, microporosity and non-metallic inclusions, have been presented. The types of inclusions and their dependences on the chemical composition of cast steel have been defined. The examples of adverse effect of inclusions on mechanical properties of cast steel have been given. To reduce their impact on the quality of castings, examples of modifications of inclusions and elements leading to changes in the morphology of inclusions, have been identified.

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