Bi-sulfide existence in 0Cr18Ni9 steel: correlation with machinability and mechanical properties
This work investigates the effect of Bi addition on the formation of sulfide inclusions, and also aims to improve the machinability and mechanical properties of type 0Cr18Ni9 stainless steel. Smelting experiments as well as machining and tensile tests were carried out in various low and high Bi cont...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-07-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785420314447 |
| _version_ | 1818127293254467584 |
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| author | Jian-bo Xie Tian Fan Zhi-qi Zeng Han Sun Jian-xun Fu |
| author_facet | Jian-bo Xie Tian Fan Zhi-qi Zeng Han Sun Jian-xun Fu |
| author_sort | Jian-bo Xie |
| collection | DOAJ |
| description | This work investigates the effect of Bi addition on the formation of sulfide inclusions, and also aims to improve the machinability and mechanical properties of type 0Cr18Ni9 stainless steel. Smelting experiments as well as machining and tensile tests were carried out in various low and high Bi content steels. Results show that the forms of Bi-MnS inclusions were: isolated particle, cavity-bridge link, semi- and complete encapsulation. The forms of MnS inclusions were found as: mushroom or rod-like, long strip, spherical, and spindle shape. The normalized frequency of 0.065, corresponding to the inclusion area above 50 μm2, was the greatest at 2300 ppm Bi, reflecting an increase in the number of larger-sized inclusions. The averge hardness of steel matrix and the inclusions at 0 ppm Bi was 179 and 166 kgf/mm2, while that after Bi addition was 154∼168 and 155∼166 kgf/mm2, respectively. The Bi addition to steel improved the surface finish of the steels after machining and increased the ductility of steel, but had little effect on the yield strength of steel. |
| first_indexed | 2024-12-11T07:15:03Z |
| format | Article |
| id | doaj.art-960e98c917054139bab43a221e5585eb |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-11T07:15:03Z |
| publishDate | 2020-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-960e98c917054139bab43a221e5585eb2022-12-22T01:16:16ZengElsevierJournal of Materials Research and Technology2238-78542020-07-019491429152Bi-sulfide existence in 0Cr18Ni9 steel: correlation with machinability and mechanical propertiesJian-bo Xie0Tian Fan1Zhi-qi Zeng2Han Sun3Jian-xun Fu4Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200072, PR ChinaCenter for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200072, PR ChinaCenter for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200072, PR ChinaCenter for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200072, PR ChinaCorresponding author.; Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200072, PR ChinaThis work investigates the effect of Bi addition on the formation of sulfide inclusions, and also aims to improve the machinability and mechanical properties of type 0Cr18Ni9 stainless steel. Smelting experiments as well as machining and tensile tests were carried out in various low and high Bi content steels. Results show that the forms of Bi-MnS inclusions were: isolated particle, cavity-bridge link, semi- and complete encapsulation. The forms of MnS inclusions were found as: mushroom or rod-like, long strip, spherical, and spindle shape. The normalized frequency of 0.065, corresponding to the inclusion area above 50 μm2, was the greatest at 2300 ppm Bi, reflecting an increase in the number of larger-sized inclusions. The averge hardness of steel matrix and the inclusions at 0 ppm Bi was 179 and 166 kgf/mm2, while that after Bi addition was 154∼168 and 155∼166 kgf/mm2, respectively. The Bi addition to steel improved the surface finish of the steels after machining and increased the ductility of steel, but had little effect on the yield strength of steel.http://www.sciencedirect.com/science/article/pii/S22387854203144470Cr18Ni9 steelBi-MnSHardnessSurface finishYield strength |
| spellingShingle | Jian-bo Xie Tian Fan Zhi-qi Zeng Han Sun Jian-xun Fu Bi-sulfide existence in 0Cr18Ni9 steel: correlation with machinability and mechanical properties Journal of Materials Research and Technology 0Cr18Ni9 steel Bi-MnS Hardness Surface finish Yield strength |
| title | Bi-sulfide existence in 0Cr18Ni9 steel: correlation with machinability and mechanical properties |
| title_full | Bi-sulfide existence in 0Cr18Ni9 steel: correlation with machinability and mechanical properties |
| title_fullStr | Bi-sulfide existence in 0Cr18Ni9 steel: correlation with machinability and mechanical properties |
| title_full_unstemmed | Bi-sulfide existence in 0Cr18Ni9 steel: correlation with machinability and mechanical properties |
| title_short | Bi-sulfide existence in 0Cr18Ni9 steel: correlation with machinability and mechanical properties |
| title_sort | bi sulfide existence in 0cr18ni9 steel correlation with machinability and mechanical properties |
| topic | 0Cr18Ni9 steel Bi-MnS Hardness Surface finish Yield strength |
| url | http://www.sciencedirect.com/science/article/pii/S2238785420314447 |
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