D312 INFLUENCE OF CHEMICAL COMPOSITION AND HEAT TREATMENT CONDITION ON IMPACT TOUGHNESS OF 15CR FERRITIC CREEP RESISTANT STEEL
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概要
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Influences of chemical composition, heat treatment and microstructure on impact toughness of 15Cr ferritic steel have been investigated. Charpy impact values of the furnace cooled steels were lower than 15J/cm^2 at room temperature independent of chemical composition. Drastic improvement in impact toughness has been attained by controlling independent of chemical composition. Drastic improvement in cooling rate after annealing. However, effect of nickel on impact toughness strongly depends on carbon and nitrogen contents Improvement in impact toughness of the 15Cr ferritic steel has not been explained by individual microstructural factors of grain size, distribution of precipitates, volume fraction of martensitic phase. It has been supposed that the increase in Charpy impact toughness of the 15Cr ferritic steel was attained by improvement in toughness of ferrite matrix itself.
- 一般社団法人日本機械学会の論文
著者
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KIMURA Kazuhiro
National Institute for Materials Science
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Toda Yoshiaki
National Institute for Materials Science
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Takenaka Toshio
Graduate School of Tokyo Institute of Technology
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Toda Yoshiaki
Steel Research Center National Institute For Materials Seienee
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Kimura Kazuhiro
Materials Data Sheet Station National Institute For Materials Science
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Tohyama Hideaki
Graduate School of Tokyo Institute of Technology
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Tohyama Hideaki
Interdisciplinary Graduate School Of Science And Engineering Tokyo Institute Of Technology:(present
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Kimura Kazuhiro
National Research Institute For Metals
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