Analysis of Microstructure Abnormal of P91 in Water Storage Tank of Super-Critical Units Caused by Impropriety Heat Treatment

Hao Yang Du; Jian Yang; Chun Lei Zhang; Zhen An Ren

doi:10.4028/www.scientific.net/AMR.803.393

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 803Analysis of Microstructure Abnormal of P91 in...

Analysis of Microstructure Abnormal of P91 in Water Storage Tank of Super-Critical Units Caused by Impropriety Heat Treatment

Abstract:

Hardness heterogeneous on weld metal and base metal in complicate structure of water storage tank was found after examination. Replica metallographic examination in hardness heterogeneous zone shows abnormal microstructures. Ostwald Ripening structure was caused by uneven temperature control during heat treatment. Lower cooling speed is the main cause of forming tempered sorbite in weld joints.

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Periodical:

Advanced Materials Research (Volume 803)

Pages:

393-396

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.803.393

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Online since:

September 2013

Authors:

Hao Yang Du, Jian Yang, Chun Lei Zhang, Zhen An Ren

Keywords:

Heat Treatment, Microstructure Abnormal, Ostwald Ripening, Water Storage Tank

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References

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