Progress in the Development and Use of Grain Refiner Based on Cerium Sulfide or Titanium Compound for Carbon Steel
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概要
- 論文の詳細を見る
A fine-grained microstructure yields the optimum combination of strength and toughness of steel. Moreover refinement of the as-cast structure can reduce the tendency for hot-cracking during forging and rolling. This paper describes how small inclusions can be used to control the microstructure of steels. These small inclusions (dispersoids) are oxides, sulfides, nitrides and carbides which are in the 1 μm size range and capable of promoting grain refinement during solidification by a process of epitaxial nucleation or in the solid state through intragranular nucleation of ferrite. Such particles are sufficiently small to be harmless from a toughness point of view, but at the same time large enough to act as potent nucleation sites during phase transformation. The dispersoids can either be created by balanced additions of strong oxide and sulfide forming elements to an impure steel melt or be added directly into the liquid steel through a specially designed master alloy containing the nucleating particles. In both cases it is possible to manipulate the steel microstructure in a positive direction, but the latter method, involving the use of a master alloy, has probably a wider industrial application.
- 社団法人 日本鉄鋼協会の論文
- 2009-07-15
著者
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Van Der
Department Of Metabolic And Endocrine Diseases University Medical Centre Utrecht
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Van Der
Department Of Anatomy Vu University Medical Center
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Van Der
Department Of Metallurgy Sintef Materials And Chemistry
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GRONG Oystein
Department of Materials Science & Engineering, Norwegian University of Science and Technology
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HAAKONSEN Fredrik
Department of Materials Science & Engineering, Norwegian University of Science and Technology
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KOLBEINSEN Leiv
Department of Materials Science & Engineering, Norwegian University of Science and Technology
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TRANELL Gabriella
Department of Materials Science & Engineering, Norwegian University of Science and Technology
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Grong Oystein
Department Of Materials Science & Engineering Norwegian University Of Science And Technology
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Grong Oystein
Department Of Material Science And Engineering Norwegian University Of Science And Technology
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Kolbeinsen Leiv
Department Of Materials Science & Engineering Norwegian University Of Science And Technology
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Kolbeinsen Leiv
Department Of Material Science And Engineering Norwegian University Of Science And Technology
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Tranell Gabriella
Department Of Materials Science & Engineering Norwegian University Of Science And Technology
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Haakonsen Fredrik
Department Of Materials Science & Engineering Norwegian University Of Science And Technology
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Van Der
Departement Wiskunde Katholieke Universiteit Leuven
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Kolbeinsen Leiv
Dep. Of Materials Sci. & Engineering Norwegian Univ. Of Sci. And Technol.
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