Growth Kinetics of Intragranular Ferrite in a Low Carbon Microalloyed Steel

Acta Metall Sin

2006, Vol. 42

Issue (6): 572-576 DOI:

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Growth Kinetics of Intragranular Ferrite in a Low Carbon Microalloyed Steel

WU Kaiming

Ministry of Education; Department of Applied Physics; Wuhan University of Science and Technology; Wuhan 430081

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WU Kaiming. Growth Kinetics of Intragranular Ferrite in a Low Carbon Microalloyed Steel. Acta Metall Sin, 2006, 42(6): 572-576 .

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Abstract The growth kinetics of ferrite formed at intragranular inclusions and austenite grain boundaries in a low carbon microalloyed steel were analyzed by optical observation and theoretical calculation. The formation of intragranular ferrite on inclusions was later than that of ferrite allotriomorphs at austenite grain boundaries within the temperature range of 650-750℃. The undercooling for the formation of ferrite on inclusions is 40℃ larger than that at austenite grain boundaries. For the former the measured growth rate constant was smaller than that calculated, and for the latter the measured growth rate constant was larger than that calculated.

Key words: microalloyed steel intragranular ferrite grain boundary ferrite

Received: 08 August 2005

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TG111，TG142

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y2006/V42/I6/572

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