Effect of Austenitizing Temperature on Microstructure and Mechanical Properties of 12% Cr Steel.
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概要
- 論文の詳細を見る
The effect of austenitizing temperature were investigated on the microstructure and mechanical properties of 12%Cr steel. Low-temperture austenitizing below 1000°C induced the carbide coarsening during subsequent tempering at 750°C for 1 hr due to the nucleation effect of undissolved M<SUB>23</SUB>C<SUB>6</SUB>. The large and spheroidized carbides enhanced the subgrain growth. On the other hand, the complete dissolution of M<SUB>23</SUB>C<SUB>6</SUB> above 1000°C caused the fine carbide formation on lath boundaries, which retarded the subgrain growth during tempering. Furthermore, the dissolution of Nb(C, N) above 1100°C enhanced the tempering resistance through increasing the stability of lath morphology and reducing the growth rate of M<SUB>23</SUB>C<SUB>6</SUB>. The increase in strength with increasing austenitizing temperature was attributed to the fine carbide distribution and the high dislocation density. Further, as the austenitizing temperature increased, the impact energy markedly reduced, due to the large proir austenite grain size and the high strength.
- The Iron and Steel Institute of Japanの論文
著者
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Kim In
Department Of Animal Resource And Sciences Dankook University
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Kim Hong
Department of Applied Sciences, Korea Maritime University, Busan 606-791, Korea
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Kim Hong
Department of Nuclear Engineering, Korea Advanced Institute of Science and Technology
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Kim In
Department of Nuclear Engineering, Korea Advanced Institute of Science and Technology
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