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Effect of Rare Earth on Microstructure and Impact Toughness of Low Carbon Steel Based on Compact Strip Production Process

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Abstract:

The effect of rare earth (RE) on microstructure and impact toughness of hot rolled low carbon structure steel based on the Compact strip production (CSP) process was investigated in this work. Scan electron microscope (SEM) were employed to characterize the microstructure and analyze the fracture surface. Moreover, hot compression experiments were also adopted on the Gleeble-1500 hot simulator as well. The results indicate that acicular ferrite and/or ultrafine ferrite morphologies can be induced when an appropriate amount of rare earth added into the low carbon steel, which possessed the satisfied strength and toughness behaviors. Compared with commercial low carbon structural steels, the additions of RE can improve dynamic recrystallization critical strain of low carbon structural steel as well. In addition, the role of RE on the formation of these acicular ferrite morphologies has been investigated.

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Periodical:

Advanced Materials Research (Volumes 189-193)

Pages:

1753-1756

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.189-193.1753

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Online since:

February 2011

Authors:

Hai Yan Wang, Hui Ping Ren, Zi Li Jin, Cui Zong

Keywords:

Impact Toughness, Low-Carbon Structural Steel, Microstructure, Rare Earth (RE)

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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