Influence of Trace Boron and Cooling Rate on the Thermal Embrittlement of 2.25Cr-1Mo Steel

A.M. Guo; Z.X. Yuan; W.X. Yuan

doi:10.4028/www.scientific.net/MSF.475-479.241

Paper Titles

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Origin of the Hydrogen Absorbed by Incoherent TiC Particles in Iron
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Development of Corrosion and Wear Resistant Coatings by an Improved HVOF Spraying Process
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Influence of Trace Boron and Cooling Rate on the Thermal Embrittlement of 2.25Cr-1Mo Steel
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Study on Thermal Fatigue Behavior of Boride Layer of H13 Steel
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Interactive Mechanisms of Sulfide Inclusions and Environmental Factors in Low Cycle Fatigue Process of Pressure Vessel Steels in High Temperature Water
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Evaluation of Thermal Degradation of 2.25Cr-1Mo Steel by High Frequency Ultrasonic Attenuation Measurement
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Influence of Trace Boron and Cooling Rate on the Thermal Embrittlement of 2.25Cr-1Mo Steel

Abstract:

The influence of trace boron and cooling rate on the thermal embrittlement of 2.25Cr -1Mo steel was investigated by thermo-mechanical simulator and SEM analysis. It was proved that the trough in the thermo-ductility curve located between 1000°C and 700°Cand shifted to lower temperature and the temperature range of the trough became shallow and narrow as the boron content increased. When the cooling rate decreased, the ductility trough became shallow and narrow too. This made the steel free of surface crack in CC process.