論文

2021年8月

The Effect of CaO-MgO Mixture on Desulfurization of Molten Ni-Base Superalloy

Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
  • Takahide Horie
  • ,
  • Takaaki Kono
  • ,
  • Yuki Kishimoto
  • ,
  • Kyoko Kawagishi
  • ,
  • Shinsuke Suzuki
  • ,
  • Hiroshi Harada

52
4
開始ページ
2687
終了ページ
2702
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1007/s11663-021-02208-4

Desulfurization ability and hydration resistance of CaO-MgO mixture were studied by comparing CaO-MgO, CaO and MgO rods. In desulfurization experiment, Ni-base superalloy and NiS powder were melted together, and each rod was held in the melt for a prescribed time under 1600 °C. S content in the alloy was lower in CaO-MgO desulfurization than that in CaO desulfurization in every holding time up to 300 seconds. Almost no desulfurization effect was confirmed in MgO. From EPMA and XRD analyses, it is considered that CaO-Al2O3-MgO ternary compound and CaS were generated and coexisted in the CaO-MgO rod during the desulfurization process. In the CaO-MgO desulfurization, the compound contained MgO as its component, and that decreased the liquidus temperature of the compound. Therefore, it is considered that the fraction of liquid increased, and the effective diffusion coefficient of S in the compound was larger than in the CaO desulfurization. In hydration experiment, each rod was maintained in an enclosed vessel with weighing paper and a cup with water for a certain period. The mass increasing ratio of the CaO-MgO was almost equal to that of the CaO. From the above, it is clear that CaO-MgO is a better desulfurization agent than CaO.

リンク情報
DOI
https://doi.org/10.1007/s11663-021-02208-4
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85107415568&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85107415568&origin=inward
ID情報
  • DOI : 10.1007/s11663-021-02208-4
  • ISSN : 1073-5615
  • SCOPUS ID : 85107415568

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