Effect of Ca/Mg on Distribution and Morphology of MnS Inclusions in 45MnVS Non-Quenched and Tempered Steel
The influence of Ca treatment, Mg treatment and Ca–Mg combined treatment on the inclusions in 45MnVS non-quenched and tempered steel were studied in the present work. After the melting experiment, a hot rolling test was carried out on the steel ingot. Additionally, the composition, quantity and morp...
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MDPI AG
2022-12-01
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| author | Lijuan Su Jun Tian Shaoyan Hu Ming Lv Xianglong Li Tianpeng Qu Deyong Wang Tianyin Zhan |
| author_facet | Lijuan Su Jun Tian Shaoyan Hu Ming Lv Xianglong Li Tianpeng Qu Deyong Wang Tianyin Zhan |
| author_sort | Lijuan Su |
| collection | DOAJ |
| description | The influence of Ca treatment, Mg treatment and Ca–Mg combined treatment on the inclusions in 45MnVS non-quenched and tempered steel were studied in the present work. After the melting experiment, a hot rolling test was carried out on the steel ingot. Additionally, the composition, quantity and morphology of inclusions in the test steel samples were analyzed by automatic scanning electron microscopy (ASPEX) and an energy dispersive X-ray spectrometer connected to scanning electron microscope (SEM-EDS). The results indicated that the inclusions in 45MnVS steel mainly consisted of a large amount of sulfides and a small amount of oxides. Sulfide inclusions could be nucleated and precipitated using oxides as a core during solidification. The proportion of spindle-shaped inclusions in sulfide with smaller sizes was higher. The sizes of MnS–oxide inclusions were larger than those of MnS. After hot rolling, the proportion of spindle-shaped MnS and complex sulfides with oxide cores in the samples was increased significantly. Compared with Ca treatment and Ca–Mg treatment, more oxides were formed in the steel with Mg treatment, which can in turn become the cores for sulfide nucleation and precipitation. Thus, the proportion of MnS–oxide inclusions in steel increased. Compared with Ca treatment and Mg treatment, steel with Ca–Mg treatment was more conducive to the formation of complex sulfides, and increased the proportion of spindle-shaped sulfides in 45MnVS steel. After Ca treatment, Mg treatment and Ca–Mg combined treatment, the proportions of spindle-shaped sulfides in steel were 23.31%, 19.39% and 43.24%, respectively. |
| first_indexed | 2024-03-09T11:42:39Z |
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| language | English |
| last_indexed | 2024-03-09T11:42:39Z |
| publishDate | 2022-12-01 |
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| spelling | doaj.art-8be9fc59b5e346ba8a4439a7eff0a6982023-11-30T23:29:38ZengMDPI AGMetals2075-47012022-12-011312310.3390/met13010023Effect of Ca/Mg on Distribution and Morphology of MnS Inclusions in 45MnVS Non-Quenched and Tempered SteelLijuan Su0Jun Tian1Shaoyan Hu2Ming Lv3Xianglong Li4Tianpeng Qu5Deyong Wang6Tianyin Zhan7School of Iron and Steel, Soochow University, Suzhou 215021, ChinaSchool of Iron and Steel, Soochow University, Suzhou 215021, ChinaSchool of Iron and Steel, Soochow University, Suzhou 215021, ChinaLaiwu Branch, Shan Dong Iron and Steel Corp Ltd., Laiwu 271105, ChinaSchool of Iron and Steel, Soochow University, Suzhou 215021, ChinaSchool of Iron and Steel, Soochow University, Suzhou 215021, ChinaSchool of Iron and Steel, Soochow University, Suzhou 215021, ChinaSchool of Iron and Steel, Soochow University, Suzhou 215021, ChinaThe influence of Ca treatment, Mg treatment and Ca–Mg combined treatment on the inclusions in 45MnVS non-quenched and tempered steel were studied in the present work. After the melting experiment, a hot rolling test was carried out on the steel ingot. Additionally, the composition, quantity and morphology of inclusions in the test steel samples were analyzed by automatic scanning electron microscopy (ASPEX) and an energy dispersive X-ray spectrometer connected to scanning electron microscope (SEM-EDS). The results indicated that the inclusions in 45MnVS steel mainly consisted of a large amount of sulfides and a small amount of oxides. Sulfide inclusions could be nucleated and precipitated using oxides as a core during solidification. The proportion of spindle-shaped inclusions in sulfide with smaller sizes was higher. The sizes of MnS–oxide inclusions were larger than those of MnS. After hot rolling, the proportion of spindle-shaped MnS and complex sulfides with oxide cores in the samples was increased significantly. Compared with Ca treatment and Ca–Mg treatment, more oxides were formed in the steel with Mg treatment, which can in turn become the cores for sulfide nucleation and precipitation. Thus, the proportion of MnS–oxide inclusions in steel increased. Compared with Ca treatment and Mg treatment, steel with Ca–Mg treatment was more conducive to the formation of complex sulfides, and increased the proportion of spindle-shaped sulfides in 45MnVS steel. After Ca treatment, Mg treatment and Ca–Mg combined treatment, the proportions of spindle-shaped sulfides in steel were 23.31%, 19.39% and 43.24%, respectively.https://www.mdpi.com/2075-4701/13/1/23non-quenched and tempered steelcalcium treatmentmagnesium treatmentinclusionssulfides |
| spellingShingle | Lijuan Su Jun Tian Shaoyan Hu Ming Lv Xianglong Li Tianpeng Qu Deyong Wang Tianyin Zhan Effect of Ca/Mg on Distribution and Morphology of MnS Inclusions in 45MnVS Non-Quenched and Tempered Steel Metals non-quenched and tempered steel calcium treatment magnesium treatment inclusions sulfides |
| title | Effect of Ca/Mg on Distribution and Morphology of MnS Inclusions in 45MnVS Non-Quenched and Tempered Steel |
| title_full | Effect of Ca/Mg on Distribution and Morphology of MnS Inclusions in 45MnVS Non-Quenched and Tempered Steel |
| title_fullStr | Effect of Ca/Mg on Distribution and Morphology of MnS Inclusions in 45MnVS Non-Quenched and Tempered Steel |
| title_full_unstemmed | Effect of Ca/Mg on Distribution and Morphology of MnS Inclusions in 45MnVS Non-Quenched and Tempered Steel |
| title_short | Effect of Ca/Mg on Distribution and Morphology of MnS Inclusions in 45MnVS Non-Quenched and Tempered Steel |
| title_sort | effect of ca mg on distribution and morphology of mns inclusions in 45mnvs non quenched and tempered steel |
| topic | non-quenched and tempered steel calcium treatment magnesium treatment inclusions sulfides |
| url | https://www.mdpi.com/2075-4701/13/1/23 |
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