Kinetics of Temper Embrittlement in 2.25Cr-1Mo Steel Used for Hot-Wall Hydrofining Reactors

Acta Metallurgica Sinica (English Letters) ›› 2004, Vol. 17 ›› Issue (2): 139-146 .

Kinetics of Temper Embrittlement in 2.25Cr-1Mo Steel Used for Hot-Wall Hydrofining Reactors

J.Z. Tan

南京工业大学机械与动力工程学院

收稿日期:2003-02-27 修回日期:2003-02-27 出版日期:2004-04-25 发布日期:2009-10-10

Kinetics of Temper Embrittlement in 2.25Cr-1Mo Steel Used for Hot-Wall Hydrofining Reactors

J.Z. Tan

College of Mechanical and Power Engineering, Nanjing University of Technology

Received:2003-02-27 Revised:2003-02-27 Online:2004-04-25 Published:2009-10-10

摘要/Abstract

Abstract: Based on the theory of grain boundary segregation, a kinetics model of temper embrittlement caused by long-term service for hot-wall hydrofining reactors was studied. The kinetics model was applied to phosphorus (P) segregation in 2.25Cr-1Mo steel used for a hot-wall hydrofining reactor, and the kinetics of grain boundary segregation of impurity P in the steel exposed to the process environment of the hydrofining reactor was calculated on the basis of the model. The Auger electron spectroscopy test was performed in order to determine the grain boundary concentration of P. The experimental result is agreement with the theoretical calculated data. The results show that the kinetics equation is reasonable for predicting the levels of grain boundary segregation of impurity P in 2.25Cr-1Mo steel used for hot-wall hydrofining reactors.

Key words: hydrofining reactor, 2.25Cr-1Mo steel, temper embrittlement,

J.Z. Tan. Kinetics of Temper Embrittlement in 2.25Cr-1Mo Steel Used for Hot-Wall Hydrofining Reactors[J]. Acta Metallurgica Sinica (English Letters), 2004, 17(2): 139-146 .

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Kinetics of Temper Embrittlement in 2.25Cr-1Mo Steel Used for Hot-Wall Hydrofining Reactors

Kinetics of Temper Embrittlement in 2.25Cr-1Mo Steel Used for Hot-Wall Hydrofining Reactors

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