Effect of Y-base rare earth on the microstructure and impact toughness of E36 steel plate

XI Xiao-jun; LAI Chao-bin; LI Jing-she; WANG Zhi-gang; SUN Le-fei; CHEN Ying-jun

doi:10.13374/j.issn2095-9389.2017.02.012

Volume 39 Issue 2

Feb. 2017

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Article Navigation > Chinese Journal of Engineering > 2017 > 39(2): 244-250

XI Xiao-jun, LAI Chao-bin, LI Jing-she, WANG Zhi-gang, SUN Le-fei, CHEN Ying-jun. Effect of Y-base rare earth on the microstructure and impact toughness of E36 steel plate[J]. Chinese Journal of Engineering, 2017, 39(2): 244-250. doi: 10.13374/j.issn2095-9389.2017.02.012

Citation:

XI Xiao-jun, LAI Chao-bin, LI Jing-she, WANG Zhi-gang, SUN Le-fei, CHEN Ying-jun. Effect of Y-base rare earth on the microstructure and impact toughness of E36 steel plate[J]. Chinese Journal of Engineering, 2017, 39(2): 244-250. doi: 10.13374/j.issn2095-9389.2017.02.012

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Effect of Y-base rare earth on the microstructure and impact toughness of E36 steel plate

doi: 10.13374/j.issn2095-9389.2017.02.012

1) School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
2) School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
3) Xinyu Iron and Steel Group Co., Ltd., Xinyu 338001, China

Received Date: 2016-04-20

Abstract

Abstract

The effect of Y-base rare earth on the inclusions modification, microstructure and impact toughness of E36 steel was investigated by using scanning electron microscopy and energy spectrum analysis. The results indicate that Y-base rare earth improves the microstructure and reduces the interlamellar spacing and content of pearlite. The typical cleavage fracture of E36 steel is quasi-cleavage and dimple fracture when adding Y-base rare earth. Fine and spherical rare earth inclusions are the main reason for the fracture transformation. The impact toughness of E36 steel is improved obviously by Y-base rare earth, especially at the low temperature. In comparison with E36 steel without Y-base rare earth, the longitudinal impact energy of E36 steel containing Y-base rare earth is increased by 33.5%, and the transverse impact energy is increased by 113.7% at -60℃. Moreover, the difference of longitudinal and transverse impact toughness is decreased by Y-base rare earth significantly. To E36 steel without Y-base rare earth, the proportion of longitudinal and transverse impact values is greater than 1.70 and it reaches 2.77 at -60℃. And the proportion of longitudinal and transverse impact values is 1.51-1.73 for E36 steel plate containing Y-base rare earth.
- rare earths,
- steel plate,
- microstructure,
- impact toughness

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References(11)

References

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