Formation of Non-metallic Inclusions of Si-killed Stainless Steel during GOR Refining Process
The formation mechanism of inclusions in Si-killed 304 stainless steel was studied by industrial experiments during GOR refining process and thermodynamic calculations. A lager number of CaO-SiO2-MgO-Al2O3-MnO-CrOx liquid spherical inclusions with different size (from 1 μm to 22 μm) had been found a...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2018-06-01
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| Series: | High Temperature Materials and Processes |
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| Online Access: | https://doi.org/10.1515/htmp-2016-0188 |
| _version_ | 1819131759707553792 |
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| author | Li Liu-yi Cheng Guo-guang Hu Bin Wang Cheng-shun Qian Guo-yu |
| author_facet | Li Liu-yi Cheng Guo-guang Hu Bin Wang Cheng-shun Qian Guo-yu |
| author_sort | Li Liu-yi |
| collection | DOAJ |
| description | The formation mechanism of inclusions in Si-killed 304 stainless steel was studied by industrial experiments during GOR refining process and thermodynamic calculations. A lager number of CaO-SiO2-MgO-Al2O3-MnO-CrOx liquid spherical inclusions with different size (from 1 μm to 22 μm) had been found after deoxidization of FeSi alloy in 10 minutes. The calculation result of FactSage 6.3 software assisted in confirming that the inclusions in size of less than 5 μm that had less than 30 % CaO mainly came from the deoxidation of FeSi alloy with Ca and Al. The inclusions in size of more than 5 μm that had more than 30 % CaO mainly came from the modification of involved slag droplets through the oxidation of Si and Al and the collision with deoxidation-type inclusions, and the degree of change was bigger for smaller inclusions. The MgO in slag and refractory was reduced by Si and Al in steel, which leaded to the unceasingly increase of Mg content in steel. Subsequently, SiO2, MnO and CrOx in inclusion were reduced by Mg, which resulted in the increase of MgO content in inclusion and the degree of increase of MgO content was greater for the larger size of inclusions. |
| first_indexed | 2024-12-22T09:20:37Z |
| format | Article |
| id | doaj.art-85944c7589fb4974a2eb3400ef8736d3 |
| institution | Directory Open Access Journal |
| issn | 0334-6455 2191-0324 |
| language | English |
| last_indexed | 2024-12-22T09:20:37Z |
| publishDate | 2018-06-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | High Temperature Materials and Processes |
| spelling | doaj.art-85944c7589fb4974a2eb3400ef8736d32022-12-21T18:31:12ZengDe GruyterHigh Temperature Materials and Processes0334-64552191-03242018-06-0137652152910.1515/htmp-2016-0188Formation of Non-metallic Inclusions of Si-killed Stainless Steel during GOR Refining ProcessLi Liu-yi0Cheng Guo-guang1Hu Bin2Wang Cheng-shun3Qian Guo-yu4State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing100083, ChinaState Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing100083, ChinaSouthwest Stainless Steel co., LTD, Leshan, Sichuan614000, ChinaSouthwest Stainless Steel co., LTD, Leshan, Sichuan614000, ChinaState Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing100083, ChinaThe formation mechanism of inclusions in Si-killed 304 stainless steel was studied by industrial experiments during GOR refining process and thermodynamic calculations. A lager number of CaO-SiO2-MgO-Al2O3-MnO-CrOx liquid spherical inclusions with different size (from 1 μm to 22 μm) had been found after deoxidization of FeSi alloy in 10 minutes. The calculation result of FactSage 6.3 software assisted in confirming that the inclusions in size of less than 5 μm that had less than 30 % CaO mainly came from the deoxidation of FeSi alloy with Ca and Al. The inclusions in size of more than 5 μm that had more than 30 % CaO mainly came from the modification of involved slag droplets through the oxidation of Si and Al and the collision with deoxidation-type inclusions, and the degree of change was bigger for smaller inclusions. The MgO in slag and refractory was reduced by Si and Al in steel, which leaded to the unceasingly increase of Mg content in steel. Subsequently, SiO2, MnO and CrOx in inclusion were reduced by Mg, which resulted in the increase of MgO content in inclusion and the degree of increase of MgO content was greater for the larger size of inclusions.https://doi.org/10.1515/htmp-2016-0188stainless steelnon-metallic inclusionsformation mechanismgor refiningfesi alloy |
| spellingShingle | Li Liu-yi Cheng Guo-guang Hu Bin Wang Cheng-shun Qian Guo-yu Formation of Non-metallic Inclusions of Si-killed Stainless Steel during GOR Refining Process High Temperature Materials and Processes stainless steel non-metallic inclusions formation mechanism gor refining fesi alloy |
| title | Formation of Non-metallic Inclusions of Si-killed Stainless Steel during GOR Refining Process |
| title_full | Formation of Non-metallic Inclusions of Si-killed Stainless Steel during GOR Refining Process |
| title_fullStr | Formation of Non-metallic Inclusions of Si-killed Stainless Steel during GOR Refining Process |
| title_full_unstemmed | Formation of Non-metallic Inclusions of Si-killed Stainless Steel during GOR Refining Process |
| title_short | Formation of Non-metallic Inclusions of Si-killed Stainless Steel during GOR Refining Process |
| title_sort | formation of non metallic inclusions of si killed stainless steel during gor refining process |
| topic | stainless steel non-metallic inclusions formation mechanism gor refining fesi alloy |
| url | https://doi.org/10.1515/htmp-2016-0188 |
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