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Influence of Rare Earth on Microstructure of 20MnCrNi2Mo Wear-Resistant Cast Steel

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Abstract:

The original austenite grain size, the inclusions and the isothermal annealing microstructure of 20MnCrNi2Mo wear-resistant cast steel without and with Rare Earth were observed by metallographic microscope and QUANTA-400 environmental scanning electronic microscope. The effect mechanism of Rare Earth in 20MnCrNi2Mo wear-resistant cast steel was investigated. The results show that adding Rare Earth in 20MnCrNi2Mo wear-resistant cast steel can refine the original austenite grains. Meanwhile, it can reduce the inclusions size and change the inclusions shape from irregular to nearly spherical. In addition, the Rare Earth in 20MnCrNi2Mo wear-resistant cast steel can increase the amount of ferrite, reduce that of pearlite in the isothermal annealing microstructure and refine the microstructure of pearlite.

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Periodical:

Advanced Materials Research (Volumes 652-654)

Pages:

934-937

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.652-654.934

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Online since:

January 2013

Authors:

Yun Ping Ji, Heng Bin Guo, Xue Qin Zheng, Zi Li Jin, Hui Ping Ren

Keywords:

20MnCrNi2Mo, Austenite Grain Size, Inclusion, Pearlite, Rare Earth (RE)

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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