Effect of Carbon on Nitrogen Solubility and AlN Formation in High Al Alloyed Liquid Steels

The nitrogen solubility and the AlN solubility product in liquid Fe–C–Al–N alloys containing a wide composition range of carbon and aluminum were measured in the temperature range of 1773–1873 K. Aluminum and carbon both decreased the nitrogen solubility in liquid iron. The simultaneous effect of al...

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Bibliographic Details
Published inISIJ International Vol. 54; no. 7; pp. 1578 - 1583
Main Authors Jang, Jung-Mock, Seo, Seok-Hyo, Kim, Young-Dae, An, Hyo-Jong, Pak, Jong-Jin
Format Journal Article
LanguageEnglish
Published The Iron and Steel Institute of Japan 2014
Subjects
aluminum
carbon
interaction parameter
nitrogen solubility
TRIP steels
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Summary:The nitrogen solubility and the AlN solubility product in liquid Fe–C–Al–N alloys containing a wide composition range of carbon and aluminum were measured in the temperature range of 1773–1873 K. Aluminum and carbon both decreased the nitrogen solubility in liquid iron. The simultaneous effect of aluminum and carbon on nitrogen solubility in liquid iron was determined. The AlN solubility product in liquid iron decreased significantly with carbon addition primarily due to the large effect of carbon on nitrogen solubility. Using the Wagner’s formalism, the experimental results were thermodynamically analyzed to determine the interaction parameters among carbon, aluminum and nitrogen in liquid iron as follows:
ISSN:0915-1559
1347-5460
DOI:10.2355/isijinternational.54.1578