Microstructure Control of Steels through Dispersoid Metallurgy Using Novel Grain Refining Alloys
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概要
- 論文の詳細を見る
This paper describes how small inclusions (designated dispersoids) can be used to control the microstructure of steels. The term “dispersoids” refers to oxides, sulphides, 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 sulphide 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. The direction of the research now being undertaken at NTNU/SINTEF to make the grain refining alloys commercially available is briefly described towards the end of the paper.
- 社団法人 日本鉄鋼協会の論文
- 2006-06-15
著者
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Van Der
Department Of Metallurgy Sintef Materials And Chemistry
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GRONG Oystein
Norwegian University of Science and Technology, Department of Materials Science & Engineering
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VAN DER
SINTEF Materials and Chemistry, Department of Metallurgy
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KOLBEINSEN Leiv
Norwegian University of Science and Technology, Department of Materials Science & Engineering
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TRANELL Gabriella
SINTEF Materials and Chemistry, Department of Metallurgy
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Grong Oystein
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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Kolbeinsen Leiv
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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Kolbeinsen Leiv
Dep. Of Materials Sci. & Engineering Norwegian Univ. Of Sci. And Technol.
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