Effects of Cooling Rate on Metallographic Structure of Boron-Bearing Steel

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Abstract:

Effects of cooling rate on metallographic structure of boron-bearing steel were investigated in present research. The results showed it consists of ferrite and pearlite formed in the initial stage of the transformation in the studied boron-bearing steels cooled at the rate from 1 to 10°C/s. For the higher cooling rate than 15 to 33°C/s, it consisted of bainite formed in the second stage of the transformation. For increasing presently cooling rate than 66°C/s, it consisted of martensite formed in the third stage of the transformation. All the transformation of metallographic structure was proved by CCT diagram.

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92-95

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July 2015

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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