Using Ce to modify inclusion in spring steel
The effect of rare earth metals addition on the Al2O3 inclusions in spring steel used in fastener of high speed railway was investigated by metallographic examination, SEM-EDS and composition analysis. To deform those harmful inclusions to improve material performance，the evolution proce...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Technical Faculty, Bor
2017-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2017/1450-53391700026W.pdf |
| Summary: | The effect of rare earth metals addition on the Al2O3 inclusions in spring
steel used in fastener of high speed railway was investigated by
metallographic examination, SEM-EDS and composition analysis. To deform
those harmful inclusions to improve material performance，the evolution
process of Al2O3 inclusions was investigated through the surface and line
scanning. Ce metal modifying Al2O3 is a stepwise reduction process based on
a formation of ring shape Ce-riched band around the Al2O3 inclusions during
reaction process. Through experiment and thermodynamic calculation, an
evolvement rule about Al2O3 inclusions change after Ce addition is obtained,
i.e. Al2O3→Ce2O3-Al2O3→Ce2O2S. Changing the inclusions from Al2O3 to rare
earth inclusions could improve the resistance to pitting corrosion based on
potentiodynamic anodic polarization test. |
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| ISSN: | 1450-5339 2217-7175 |