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- W2050781105 abstract "Abstract Chromium is an effective element for improvement in the oxidation resistance of steels. However, chromium addition to ferritic creep resistant steel is restricted to around 9–10 wt.%, since excess addition of chromium results in formation of delta-ferrite which decreases creep strength and toughness. In this study, influence of normalizing heat treatment under high pressure on microstructure and creep strength has been investigated in a steel containing 15 wt.% of chromium, since austenite single phase region is extended up to about 20 wt.% of chromium under high pressure of about 4 GPa. In contrast to a ferritic microstructure of the steel normalized under atmospheric pressure of 100 kPa, the martensitic one was found in steel normalized under high pressure of 4 GPa. Hardness in the as tempered condition of the steels subjected to normalizing heat treatment at 1273 and 1173 K under 4 GPa was 290 and 289 HV, respectively. This is significantly higher than the value of 182 HV for the steel normalized at 1273 K under atmospheric pressure of 100 kPa. Creep rate of the steel normalized under high pressure of 4 GPa was significantly smaller than that of the steel normalized under pressure of 100 kPa. It has been concluded that high pressure normalizing heat treatment is effective to suppress a formation of delta-ferrite and to improve both creep strength and oxidation resistance." @default.
- W2050781105 created "2016-06-24" @default.
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- W2050781105 date "2004-12-01" @default.
- W2050781105 modified "2023-09-30" @default.
- W2050781105 title "Influence of high pressure normalizing heat treatment on microstructure and creep strength of high Cr steels" @default.
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- W2050781105 doi "https://doi.org/10.1016/j.msea.2004.01.097" @default.
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