Control of the concentrated-precipitation behaviour of Cr23C6 and its effect on the microstructure and properties of S600E sorbitic stainless steel
The influences of heat treatment on the microstructure, element distribution, precipitation behaviour, mechanical properties, and corrosion resistance of S600E sorbitic stainless steel were studied. The influence of heat treatment on the precipitation kinetics of Cr23C6 was analysed through theoreti...
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424026139 |
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| author | Chenglin Zhu Xiuhua Gao Changyou Zhu Wang Li Cairu Gao Zhenguang Liu Chi Yu |
| author_facet | Chenglin Zhu Xiuhua Gao Changyou Zhu Wang Li Cairu Gao Zhenguang Liu Chi Yu |
| author_sort | Chenglin Zhu |
| collection | DOAJ |
| description | The influences of heat treatment on the microstructure, element distribution, precipitation behaviour, mechanical properties, and corrosion resistance of S600E sorbitic stainless steel were studied. The influence of heat treatment on the precipitation kinetics of Cr23C6 was analysed through theoretical calculations. The results showed that the compositional nonuniformity of the hot-rolled experimental steel was eliminated with increasing solution temperature. The proportion of high-angle boundaries increased and the tempered sorbite structure coarsened with increasing tempering temperature. The main precipitated phases in the sorbitic stainless steel included large-sized Cr23C6 distributed along the grain boundaries and Nb and Ti carbides uniformly distributed within the grains. The temperatures with the fastest precipitation of M23C6 and MX phases were 870 °C and 950 °C, respectively, and the precipitation of MX could suppress the concentrated precipitation of Cr23C6 at the grain boundaries. By regulating the heat treatment process, the grain boundary area in the tempered sorbite structure was increased, the dissolution of Cr23C6 was promoted, and the precipitation kinetics of Cr23C6 were reduced, which suppressed the concentrated precipitation of Cr23C6 at the grain boundaries. Therefore, the mechanical properties and chloride pitting corrosion resistance of S600E sorbitic stainless steel were improved. |
| format | Article |
| id | doaj-art-7d2faf2ab66c4c7ab3e8b201dec6286e |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-7d2faf2ab66c4c7ab3e8b201dec6286e2024-12-26T08:55:30ZengElsevierJournal of Materials Research and Technology2238-78542024-11-013371937205Control of the concentrated-precipitation behaviour of Cr23C6 and its effect on the microstructure and properties of S600E sorbitic stainless steelChenglin Zhu0Xiuhua Gao1Changyou Zhu2Wang Li3Cairu Gao4Zhenguang Liu5Chi Yu6State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, PR ChinaState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, PR China; Corresponding author.State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, PR ChinaState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, PR ChinaState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, PR ChinaSchool of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212000, PR ChinaSchool of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, PR ChinaThe influences of heat treatment on the microstructure, element distribution, precipitation behaviour, mechanical properties, and corrosion resistance of S600E sorbitic stainless steel were studied. The influence of heat treatment on the precipitation kinetics of Cr23C6 was analysed through theoretical calculations. The results showed that the compositional nonuniformity of the hot-rolled experimental steel was eliminated with increasing solution temperature. The proportion of high-angle boundaries increased and the tempered sorbite structure coarsened with increasing tempering temperature. The main precipitated phases in the sorbitic stainless steel included large-sized Cr23C6 distributed along the grain boundaries and Nb and Ti carbides uniformly distributed within the grains. The temperatures with the fastest precipitation of M23C6 and MX phases were 870 °C and 950 °C, respectively, and the precipitation of MX could suppress the concentrated precipitation of Cr23C6 at the grain boundaries. By regulating the heat treatment process, the grain boundary area in the tempered sorbite structure was increased, the dissolution of Cr23C6 was promoted, and the precipitation kinetics of Cr23C6 were reduced, which suppressed the concentrated precipitation of Cr23C6 at the grain boundaries. Therefore, the mechanical properties and chloride pitting corrosion resistance of S600E sorbitic stainless steel were improved.http://www.sciencedirect.com/science/article/pii/S2238785424026139Tempered sorbite structureCr23C6 concentrated-precipitationSolution temperaturePrecipitation kineticsChloride pitting corrosion |
| spellingShingle | Chenglin Zhu Xiuhua Gao Changyou Zhu Wang Li Cairu Gao Zhenguang Liu Chi Yu Control of the concentrated-precipitation behaviour of Cr23C6 and its effect on the microstructure and properties of S600E sorbitic stainless steel Journal of Materials Research and Technology Tempered sorbite structure Cr23C6 concentrated-precipitation Solution temperature Precipitation kinetics Chloride pitting corrosion |
| title | Control of the concentrated-precipitation behaviour of Cr23C6 and its effect on the microstructure and properties of S600E sorbitic stainless steel |
| title_full | Control of the concentrated-precipitation behaviour of Cr23C6 and its effect on the microstructure and properties of S600E sorbitic stainless steel |
| title_fullStr | Control of the concentrated-precipitation behaviour of Cr23C6 and its effect on the microstructure and properties of S600E sorbitic stainless steel |
| title_full_unstemmed | Control of the concentrated-precipitation behaviour of Cr23C6 and its effect on the microstructure and properties of S600E sorbitic stainless steel |
| title_short | Control of the concentrated-precipitation behaviour of Cr23C6 and its effect on the microstructure and properties of S600E sorbitic stainless steel |
| title_sort | control of the concentrated precipitation behaviour of cr23c6 and its effect on the microstructure and properties of s600e sorbitic stainless steel |
| topic | Tempered sorbite structure Cr23C6 concentrated-precipitation Solution temperature Precipitation kinetics Chloride pitting corrosion |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424026139 |
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