Effects of Ti-Mg complex deoxidation and sulfur content on the characteristics of inclusions and the precipitation behavior of MnS
The morphology, size, composition, and number of inclusions in pipeline steel were characterized by scanning electron microscopy and energy dispersive spectroscopy. The characteristics of the inclusions with different Ti/Mg ratios as well as the influence of sulfur content and the number of deoxidat...
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Science Press
2015-03-01
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| Series: | 工程科学学报 |
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| Online Access: | http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2015.03.005 |
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| author | ZHENG Wan WU Zhen-hua LI Guang-qiang ZHU Cheng-yi |
| author_facet | ZHENG Wan WU Zhen-hua LI Guang-qiang ZHU Cheng-yi |
| author_sort | ZHENG Wan |
| collection | DOAJ |
| description | The morphology, size, composition, and number of inclusions in pipeline steel were characterized by scanning electron microscopy and energy dispersive spectroscopy. The characteristics of the inclusions with different Ti/Mg ratios as well as the influence of sulfur content and the number of deoxidation products on the precipitation behavior of MnS were investigated, and the corresponding thermodynamic calculations were carried out. It is found that the core of the inclusions is mainly composed of MgO-Al2O3-Ti2O3, MgO-Ti2O3 or MgO, and then MnS wraps or locally precipitates on them. The inclusions have the average size smaller than 1.3 txm and the number of 300 to 450 mm-2; moreover, their morphology is diverse such as round, polygonal and square. When the Ti/Mg atomic ratio is 0.05 to 0.2, the inclusions are round and small. With the decrease of sulfur content, MnS less tends to precipitate during solidification, its ways of precipitation on the inclusion surface will change from wrapped to local precipitated. A great number of oxides is conducive to the heterogeneous nucleation of more finely MnS on the surface of complex oxides. The Ti-Mg complex deoxidation products are small and dispersed, can become the heterogeneous nucleation core of MnS, and may reduce the harm of MnS and oxides at the same time. |
| format | Article |
| id | doaj-art-286325b20dec4d12b82dcb35e837dc1d |
| institution | OA Journals |
| issn | 2095-9389 |
| language | zho |
| publishDate | 2015-03-01 |
| publisher | Science Press |
| record_format | Article |
| series | 工程科学学报 |
| spelling | doaj-art-286325b20dec4d12b82dcb35e837dc1d2025-08-20T02:17:04ZzhoScience Press工程科学学报2095-93892015-03-0137329230010.13374/j.issn2095-9389.2015.03.005Effects of Ti-Mg complex deoxidation and sulfur content on the characteristics of inclusions and the precipitation behavior of MnSZHENG Wan0WU Zhen-hua1LI Guang-qiang2ZHU Cheng-yi3Key Laboratory for Ferrous Metallurgy and Resources Utilization(Ministry of Education), Wuhan University of Science and Technology, Wuhan 430081, ChinaKey Laboratory for Ferrous Metallurgy and Resources Utilization(Ministry of Education), Wuhan University of Science and Technology, Wuhan 430081, ChinaKey Laboratory for Ferrous Metallurgy and Resources Utilization(Ministry of Education), Wuhan University of Science and Technology, Wuhan 430081, ChinaKey Laboratory for Ferrous Metallurgy and Resources Utilization(Ministry of Education), Wuhan University of Science and Technology, Wuhan 430081, ChinaThe morphology, size, composition, and number of inclusions in pipeline steel were characterized by scanning electron microscopy and energy dispersive spectroscopy. The characteristics of the inclusions with different Ti/Mg ratios as well as the influence of sulfur content and the number of deoxidation products on the precipitation behavior of MnS were investigated, and the corresponding thermodynamic calculations were carried out. It is found that the core of the inclusions is mainly composed of MgO-Al2O3-Ti2O3, MgO-Ti2O3 or MgO, and then MnS wraps or locally precipitates on them. The inclusions have the average size smaller than 1.3 txm and the number of 300 to 450 mm-2; moreover, their morphology is diverse such as round, polygonal and square. When the Ti/Mg atomic ratio is 0.05 to 0.2, the inclusions are round and small. With the decrease of sulfur content, MnS less tends to precipitate during solidification, its ways of precipitation on the inclusion surface will change from wrapped to local precipitated. A great number of oxides is conducive to the heterogeneous nucleation of more finely MnS on the surface of complex oxides. The Ti-Mg complex deoxidation products are small and dispersed, can become the heterogeneous nucleation core of MnS, and may reduce the harm of MnS and oxides at the same time.http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2015.03.005pipeline steeldeoxidationsulfur contentinclusionsmanganese sulfideprecipitation behavior |
| spellingShingle | ZHENG Wan WU Zhen-hua LI Guang-qiang ZHU Cheng-yi Effects of Ti-Mg complex deoxidation and sulfur content on the characteristics of inclusions and the precipitation behavior of MnS 工程科学学报 pipeline steel deoxidation sulfur content inclusions manganese sulfide precipitation behavior |
| title | Effects of Ti-Mg complex deoxidation and sulfur content on the characteristics of inclusions and the precipitation behavior of MnS |
| title_full | Effects of Ti-Mg complex deoxidation and sulfur content on the characteristics of inclusions and the precipitation behavior of MnS |
| title_fullStr | Effects of Ti-Mg complex deoxidation and sulfur content on the characteristics of inclusions and the precipitation behavior of MnS |
| title_full_unstemmed | Effects of Ti-Mg complex deoxidation and sulfur content on the characteristics of inclusions and the precipitation behavior of MnS |
| title_short | Effects of Ti-Mg complex deoxidation and sulfur content on the characteristics of inclusions and the precipitation behavior of MnS |
| title_sort | effects of ti mg complex deoxidation and sulfur content on the characteristics of inclusions and the precipitation behavior of mns |
| topic | pipeline steel deoxidation sulfur content inclusions manganese sulfide precipitation behavior |
| url | http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2015.03.005 |
| work_keys_str_mv | AT zhengwan effectsoftimgcomplexdeoxidationandsulfurcontentonthecharacteristicsofinclusionsandtheprecipitationbehaviorofmns AT wuzhenhua effectsoftimgcomplexdeoxidationandsulfurcontentonthecharacteristicsofinclusionsandtheprecipitationbehaviorofmns AT liguangqiang effectsoftimgcomplexdeoxidationandsulfurcontentonthecharacteristicsofinclusionsandtheprecipitationbehaviorofmns AT zhuchengyi effectsoftimgcomplexdeoxidationandsulfurcontentonthecharacteristicsofinclusionsandtheprecipitationbehaviorofmns |