The effect of MgTiO3Adding on Inclusion Characteristics
| Autor: | Chen Xu, Mingya Zhang, Jianli Li, Songlin Ran, Mengwei Shan, Qiang Yue, Hui Kong |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | High Temperature Materials and Processes, Vol 38, Iss 2019, Pp 576-581 (2019) |
| Druh dokumentu: | article |
| ISSN: | 0334-6455 2191-0324 |
| DOI: | 10.1515/htmp-2019-0004 |
| Popis: | MgTiO3 powder was directly added into molten steel at 1873K, and its effect on inclusion characteristics was studied by a scanning electron microscope and an energy dispersive spectrometer. Thermodynamic calculation indicates that MgTiO3 is unstable in molten steel and may decompose into [Ti], [O] and MgO. However, only Ti-bearing inclusions were observed in the treated sample, and Mg-bearing inclusions were absent. This can be explained by the features of wettability and stability for MgO. Compared with a Non-treated sample, both oxide and coarse MnS in treated sample were refined. For the oxide, this originates from the formation of Ti-bearing inclusion. For coarse MnS, this may be due to the fact that Ti can aggravate S segregation. Besides, this aggravation makes coarse MnS less globular. After etching, it was found that in the treated sample, Ti-bearing inclusion can induce the nucleation of intragranular acicular ferrites. This appearance was totally different from that of Non-treated sample, and indicates the effectiveness of external adding method in oxide metallurgy. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|