Kinetic Study of the Ferrosilicon Nitriding Process

The ferrosilicon nitride used for steelmaking has been synthesized by direct nitriding. The relationship between the reaction temperature and nitriding effect was investigated. The results show that the initial reaction temperature between FeSi75 and nitrogen is approximately 900°C. Increasing holdi...

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Bibliographic Details
Published inJOM (1989) Vol. 71; no. 8; pp. 2821 - 2826
Main Authors Diao, Jiang, Wang, Guang, He, Shaogang, Ke, Zhaoqun, Xie, Bing, Zhao, Jiaxin, Li, Gang
Format Journal Article
LanguageEnglish
Published New York Springer US 01.08.2019
Springer Nature B.V
Subjects
Carbon
Chemistry/Food Science
Earth Sciences
Engineering
Environment
Ferrosilicon
Metallurgical Kinetics
Nitriding
Nitrogen
Particle size
Physics
Precipitation hardening
Raw materials
Silicon nitride
Steel
Steel making
Temperature
Thermogravimetric analysis
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Summary:The ferrosilicon nitride used for steelmaking has been synthesized by direct nitriding. The relationship between the reaction temperature and nitriding effect was investigated. The results show that the initial reaction temperature between FeSi75 and nitrogen is approximately 900°C. Increasing holding temperature or prolonging holding time is beneficial to increase the nitrogen content in the nitrided product. At 1400°C, the nitrogen content in ferrosilicon nitride reached 30.28% when the holding time was 4 h. With the increase of nitriding reaction temperature, the phase of α-Si 3 N 4 transferred to β-Si 3 N 4 gradually. Pore diffusion was identified as the dominant restrictive link during the ferrosilicon nitriding process.
ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-019-03491-y