Effects of Alloying Process on Inclusions in Fe-9Cr Alloy Reinforced with Y₂O₃ Nanoparticles

Abstract:

The effects of the alloying sequence and refining time on the inclusions in Fe–9Cr alloy reinforced with Y₂O₃ nanoparticles were investigated. The size and number of inclusions in the alloys were determined via optical microscopy, and their morphology and composition were determined via scanning electron microscopy. The Y₂O₃ mainly acted as a nucleating agent in the Si–Mn+Y₂O₃+Ti alloying process, promoting the precipitation of other oxides, which was beneficial for the formation of Y–Ti–O particles. In contrast, no Y–Ti inclusions were formed when the Si–Mn+Ti+Y₂O₃ alloying process was employed. In addition, the inclusions in the alloy tended to stabilize after refinement for 5–10 min. This study offers a general pathway for the manufacture of oxide dispersion strengthened steel via a smelting process.

• Periodical: Materials Science Forum (Volume 993)
• Pages: 29-38
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.993.29
• Online since: May 2020
• Authors: Guo Xing Qiu, Le Xin Qu, Dong Wei Wang, Dong Ping Zhan*, Zhou Hua Jiang, Hui Shu Zhang
• Keywords: Fe-Cr, Inclusion, ODS Steel, Y₂O₃

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