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| Effect of Aging Treatment on Mechanical Property and H2S Resistant Behavior of Acicular Ferrite Pipeline Steels |
| ZHAO Mingchun; SHAN Yiyin; YANG Ke |
| Institute of Metal Research; The Chinese Academy of Sciences; Shenyang 110016 |
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Cite this article:
ZHAO Mingchun; SHAN Yiyin; YANG Ke. Effect of Aging Treatment on Mechanical Property and H2S Resistant Behavior of Acicular Ferrite Pipeline Steels. Acta Metall Sin, 2004, 40(9): 948-954 .
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Abstract Hot-rolled acicular ferrite pipeline steel plate
can be further strengthened by aging treatment. After an
aging treatment at 600 ℃ for 10 h, the acicular ferrite pipeline steel
plate is strengthened to the level of X 100 while its impact toughness
does not obviously decrease. At the same time, its H2S
cracking resistant ability is also improved obviously. All
these can be attributed to the additional precipitation
of micro-alloyed carbonitrides, the transformation of
martensite/austenite (M/A) islands to tempering martensite
and the improvement of the uniformity in acicular ferrite
microstructure during aging treatment.
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Received: 25 September 2003
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