Strengthening Mechanism and Carbide Precipitation Behavior of Nb-Mo Microalloy Medium Mn Steel
This study investigates the strengthening mechanism and carbide precipitation behavior of medium Mn steel with Nb-Mo microalloy after cyclic quenching and austenite reverse transformation treatment. The results show that the Nb/Mo element not only precipitates (Nb,Mo)C in the grains, hindering the m...
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| Format: | Article |
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MDPI AG
2021-12-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/23/7461 |
| _version_ | 1797507448343363584 |
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| author | Chunquan Liu Fen Xiong Yong Wang Yuxin Cao Xinbin Liu Zhengliang Xue Qichun Peng Longsheng Peng |
| author_facet | Chunquan Liu Fen Xiong Yong Wang Yuxin Cao Xinbin Liu Zhengliang Xue Qichun Peng Longsheng Peng |
| author_sort | Chunquan Liu |
| collection | DOAJ |
| description | This study investigates the strengthening mechanism and carbide precipitation behavior of medium Mn steel with Nb-Mo microalloy after cyclic quenching and austenite reverse transformation treatment. The results show that the Nb/Mo element not only precipitates (Nb,Mo)C in the grains, hindering the movement of dislocations and increases the strength, but also segregates at the austenite/ferrite grain boundary, thus delaying the transformation from austenite to ferrite. In addition, a large amount of nano-scale cementite is retained after cyclic quenching and austenite reverse transformation, which has a positive effect on the proportion of retained austenite in medium Mn steel. Moreover, the carbides with small size and low Mn content are dissolved, and the decomposed C and Mn content are beneficial to the nucleation of austenite during the intercritical annealing process at a temperature of 690 °C. |
| first_indexed | 2024-03-10T04:49:37Z |
| format | Article |
| id | doaj.art-aeab19ffdf914d918a57f4918f5c55c7 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T04:49:37Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-aeab19ffdf914d918a57f4918f5c55c72023-11-23T02:43:54ZengMDPI AGMaterials1996-19442021-12-011423746110.3390/ma14237461Strengthening Mechanism and Carbide Precipitation Behavior of Nb-Mo Microalloy Medium Mn SteelChunquan Liu0Fen Xiong1Yong Wang2Yuxin Cao3Xinbin Liu4Zhengliang Xue5Qichun Peng6Longsheng Peng7Hunan Institute of Technology, Hengyang 421002, ChinaHunan Institute of Technology, Hengyang 421002, ChinaHunan Institute of Technology, Hengyang 421002, ChinaHunan Institute of Technology, Hengyang 421002, ChinaHunan Institute of Technology, Hengyang 421002, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, ChinaHunan Lifang Roll Co., Ltd., Hengyang 421600, ChinaThis study investigates the strengthening mechanism and carbide precipitation behavior of medium Mn steel with Nb-Mo microalloy after cyclic quenching and austenite reverse transformation treatment. The results show that the Nb/Mo element not only precipitates (Nb,Mo)C in the grains, hindering the movement of dislocations and increases the strength, but also segregates at the austenite/ferrite grain boundary, thus delaying the transformation from austenite to ferrite. In addition, a large amount of nano-scale cementite is retained after cyclic quenching and austenite reverse transformation, which has a positive effect on the proportion of retained austenite in medium Mn steel. Moreover, the carbides with small size and low Mn content are dissolved, and the decomposed C and Mn content are beneficial to the nucleation of austenite during the intercritical annealing process at a temperature of 690 °C.https://www.mdpi.com/1996-1944/14/23/7461medium Mn steelstrength mechanismnanometer-sized carbideprecipitation |
| spellingShingle | Chunquan Liu Fen Xiong Yong Wang Yuxin Cao Xinbin Liu Zhengliang Xue Qichun Peng Longsheng Peng Strengthening Mechanism and Carbide Precipitation Behavior of Nb-Mo Microalloy Medium Mn Steel Materials medium Mn steel strength mechanism nanometer-sized carbide precipitation |
| title | Strengthening Mechanism and Carbide Precipitation Behavior of Nb-Mo Microalloy Medium Mn Steel |
| title_full | Strengthening Mechanism and Carbide Precipitation Behavior of Nb-Mo Microalloy Medium Mn Steel |
| title_fullStr | Strengthening Mechanism and Carbide Precipitation Behavior of Nb-Mo Microalloy Medium Mn Steel |
| title_full_unstemmed | Strengthening Mechanism and Carbide Precipitation Behavior of Nb-Mo Microalloy Medium Mn Steel |
| title_short | Strengthening Mechanism and Carbide Precipitation Behavior of Nb-Mo Microalloy Medium Mn Steel |
| title_sort | strengthening mechanism and carbide precipitation behavior of nb mo microalloy medium mn steel |
| topic | medium Mn steel strength mechanism nanometer-sized carbide precipitation |
| url | https://www.mdpi.com/1996-1944/14/23/7461 |
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