Precipitation Behavior of NbC in 9%Cr1%Mo0.2%VNb Steel
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概要
- 論文の詳細を見る
Dissolved Nb in both austetinic and ferritic phases of 9%Cr1%Mo0.2%VNb steel was measured using an inductively coupled plasma atomic emission spectroscope (ICP), and the microstructure has been characterized using a field emission scanning electron microscope of a ultra high resolution type and an analytical electron microscope. The dissolved Nb in austenitic phase measured by ICP is in agreement with that predicted by a phase equilibrium calculation system. However, the measured values of dissolved Nb in the specimens which are heat-treated for 2h just below AC1 are much higher than the calculated values. It is newly confirmed by both chemical and physical analyses that the fine NbC particles which are preformed at 950°C and stable at this temperature are on one occasion re-dissolved into the matrix by the subsequent heat treatment at 800°C for 2h. This fact suggests that high temperature tempering is recommended in order to improve creep resistance of high Cr heat resisting steels which contain strong carbo-nitride formers.
- 社団法人 日本鉄鋼協会の論文
- 2001-08-15
著者
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Esaka Hisao
Department Of Materials Science & Engineering National Defense Academy
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Shinozuka Kei
Department Of Materials Science And Engineering National Defense Academy
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Esaka H
Department Of Materials Science And Engineering National Defense Academy
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SHINOZUKA Kei
National Defense Academy, Department of Materials Science and Engineering
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TAMURA Manabu
National Defense Academy, Department of Materials Science and Engineering
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Esaka H
National Defense Academy Materials Science And Engineering
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Tamura Manabu
Department Of Materials Science And Engineering National Defense Academy
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Tamura M
Department Of Materials Science And Engineering National Defense Academy
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IKEDA Kiyotaka
National Defense Academy
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ESAKA Hisao
Graduate School of National Defense Academy
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Tamura Manabu
National Defense Academy Dept. Of Materials Science & Engineering
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Shinozuka Kei
Department of Materials Science and Engineering, National Defense Academy
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