Effect of segregation on hot deformation behavior of GCr15 bearing steel in continuous casting
GCr15 steel, renowned as one of the most extensively utilized metallic materials in bearing applications, has been the subject of considerable research, particularly regarding its hot deformation behavior. However, the effect of macro- and micro-segregation on the hot deformation behavior of GCr15 s...
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| Language: | English |
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Elsevier
2025-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424028497 |
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| author | Mingyang Liu Tianyu Zhang Chenchong Wang Ye Liu Junyang Qian Hongshuang Di Qing Yin Chi Zhang |
| author_facet | Mingyang Liu Tianyu Zhang Chenchong Wang Ye Liu Junyang Qian Hongshuang Di Qing Yin Chi Zhang |
| author_sort | Mingyang Liu |
| collection | DOAJ |
| description | GCr15 steel, renowned as one of the most extensively utilized metallic materials in bearing applications, has been the subject of considerable research, particularly regarding its hot deformation behavior. However, the effect of macro- and micro-segregation on the hot deformation behavior of GCr15 steel remains underexplored. In this study, a comprehensive investigation was conducted to systematically assess the hot deformation behavior of continuously cast GCr15 steel under varying degrees of macro- and micro-segregation through hot compression testing. Flow curves were utilized to construct hot processing maps, enabling a detailed analysis of the effects of segregation on hot workability. The findings reveal that, at a deformation temperature of 800 °C and a strain rate of 10 s−1, the negatively segregated regions of GCr15 steel exhibit a greater propensity for instability during hot working than their positively segregated counterparts. This heightened instability, which accelerates with increasing true strain, can be attributed to stress concentrations arising from inhomogeneities inherent to the continuous casting process. Additionally, the negative macro-segregation zone demonstrated superior hot workability, attributed to its lower hardness. Based on these observations, the optimal hot processing conditions were identified as a deformation temperature of 1000 °C and a strain rate of 0.1 s−1. |
| format | Article |
| id | doaj-art-66b800389c374cbb8989d7bb7a2b3dec |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-66b800389c374cbb8989d7bb7a2b3dec2025-01-19T06:25:11ZengElsevierJournal of Materials Research and Technology2238-78542025-01-01344857Effect of segregation on hot deformation behavior of GCr15 bearing steel in continuous castingMingyang Liu0Tianyu Zhang1Chenchong Wang2Ye Liu3Junyang Qian4Hongshuang Di5Qing Yin6Chi Zhang7State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, PR ChinaKey Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, PR China; Corresponding author.State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, PR ChinaJiangyin Xingcheng Special Steel Works Co., Ltd, Jiangyin, 214400, PR ChinaJiangyin Xingcheng Special Steel Works Co., Ltd, Jiangyin, 214400, PR ChinaState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, PR ChinaJiangyin Xingcheng Special Steel Works Co., Ltd, Jiangyin, 214400, PR China; Corresponding author.Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, PR ChinaGCr15 steel, renowned as one of the most extensively utilized metallic materials in bearing applications, has been the subject of considerable research, particularly regarding its hot deformation behavior. However, the effect of macro- and micro-segregation on the hot deformation behavior of GCr15 steel remains underexplored. In this study, a comprehensive investigation was conducted to systematically assess the hot deformation behavior of continuously cast GCr15 steel under varying degrees of macro- and micro-segregation through hot compression testing. Flow curves were utilized to construct hot processing maps, enabling a detailed analysis of the effects of segregation on hot workability. The findings reveal that, at a deformation temperature of 800 °C and a strain rate of 10 s−1, the negatively segregated regions of GCr15 steel exhibit a greater propensity for instability during hot working than their positively segregated counterparts. This heightened instability, which accelerates with increasing true strain, can be attributed to stress concentrations arising from inhomogeneities inherent to the continuous casting process. Additionally, the negative macro-segregation zone demonstrated superior hot workability, attributed to its lower hardness. Based on these observations, the optimal hot processing conditions were identified as a deformation temperature of 1000 °C and a strain rate of 0.1 s−1.http://www.sciencedirect.com/science/article/pii/S2238785424028497GCr15 steelHot deformation behaviorSegregationHot processing mapInstability |
| spellingShingle | Mingyang Liu Tianyu Zhang Chenchong Wang Ye Liu Junyang Qian Hongshuang Di Qing Yin Chi Zhang Effect of segregation on hot deformation behavior of GCr15 bearing steel in continuous casting Journal of Materials Research and Technology GCr15 steel Hot deformation behavior Segregation Hot processing map Instability |
| title | Effect of segregation on hot deformation behavior of GCr15 bearing steel in continuous casting |
| title_full | Effect of segregation on hot deformation behavior of GCr15 bearing steel in continuous casting |
| title_fullStr | Effect of segregation on hot deformation behavior of GCr15 bearing steel in continuous casting |
| title_full_unstemmed | Effect of segregation on hot deformation behavior of GCr15 bearing steel in continuous casting |
| title_short | Effect of segregation on hot deformation behavior of GCr15 bearing steel in continuous casting |
| title_sort | effect of segregation on hot deformation behavior of gcr15 bearing steel in continuous casting |
| topic | GCr15 steel Hot deformation behavior Segregation Hot processing map Instability |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424028497 |
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