Metastable Austenite Transformation Kinetics of Medium-Carbon Silicon-Rich Steel during Partitioning in a Q & P Process
In the present study, quenching and partitioning (Q & P) treatment of a medium-carbon silicon-rich steel was processed by a dilatometer. The volume fraction of the retained austenite at different partitioning times was determined by X-ray diffraction (XRD). The metastable austenite transformatio...
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MDPI AG
2020-06-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/10/6/738 |
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| author | Yuan Liu Yan Han Sheng Yin Fei Zhao |
| author_facet | Yuan Liu Yan Han Sheng Yin Fei Zhao |
| author_sort | Yuan Liu |
| collection | DOAJ |
| description | In the present study, quenching and partitioning (Q & P) treatment of a medium-carbon silicon-rich steel was processed by a dilatometer. The volume fraction of the retained austenite at different partitioning times was determined by X-ray diffraction (XRD). The metastable austenite transformation process after different partitioning times was studied by a combination of dilatometry, XRD, and transmission electron microscopy (TEM). Analysis of the transformation kinetics of metastable austenite during partitioning by means of dilatometry and the Johnson–Mehl–Avrami–Kolmogorov (JMAK) equation was carried out. The results show that the volume fraction of retained austenite increases first and then decreases with the increase of the partitioning time. The transformation active energy <i>Q</i> = 141 kJ·mol<sup>−1</sup> and the Avrami exponent <i>n</i> = 1. The transformation product of metastable austenite is needle-like bainite, which grows perpendicularly towards the boundary of the austenite. Finally, the blocky austenite was divided into lath-shaped forms. |
| first_indexed | 2024-03-10T19:25:59Z |
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| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T19:25:59Z |
| publishDate | 2020-06-01 |
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| series | Metals |
| spelling | doaj.art-864b0716b3674484948a822923b891d32023-11-20T02:34:55ZengMDPI AGMetals2075-47012020-06-0110673810.3390/met10060738Metastable Austenite Transformation Kinetics of Medium-Carbon Silicon-Rich Steel during Partitioning in a Q & P ProcessYuan Liu0Yan Han1Sheng Yin2Fei Zhao3College of Materials and Metallurgy, Guizhou University, Guiyang 550025, ChinaCollege of Materials and Metallurgy, Guizhou University, Guiyang 550025, ChinaCollege of Materials and Metallurgy, Guizhou University, Guiyang 550025, ChinaCollege of Materials and Metallurgy, Guizhou University, Guiyang 550025, ChinaIn the present study, quenching and partitioning (Q & P) treatment of a medium-carbon silicon-rich steel was processed by a dilatometer. The volume fraction of the retained austenite at different partitioning times was determined by X-ray diffraction (XRD). The metastable austenite transformation process after different partitioning times was studied by a combination of dilatometry, XRD, and transmission electron microscopy (TEM). Analysis of the transformation kinetics of metastable austenite during partitioning by means of dilatometry and the Johnson–Mehl–Avrami–Kolmogorov (JMAK) equation was carried out. The results show that the volume fraction of retained austenite increases first and then decreases with the increase of the partitioning time. The transformation active energy <i>Q</i> = 141 kJ·mol<sup>−1</sup> and the Avrami exponent <i>n</i> = 1. The transformation product of metastable austenite is needle-like bainite, which grows perpendicularly towards the boundary of the austenite. Finally, the blocky austenite was divided into lath-shaped forms.https://www.mdpi.com/2075-4701/10/6/738medium-carbon silicon-rich steelquenching and partitioning processmetastable austenitetransformation kinetics |
| spellingShingle | Yuan Liu Yan Han Sheng Yin Fei Zhao Metastable Austenite Transformation Kinetics of Medium-Carbon Silicon-Rich Steel during Partitioning in a Q & P Process Metals medium-carbon silicon-rich steel quenching and partitioning process metastable austenite transformation kinetics |
| title | Metastable Austenite Transformation Kinetics of Medium-Carbon Silicon-Rich Steel during Partitioning in a Q & P Process |
| title_full | Metastable Austenite Transformation Kinetics of Medium-Carbon Silicon-Rich Steel during Partitioning in a Q & P Process |
| title_fullStr | Metastable Austenite Transformation Kinetics of Medium-Carbon Silicon-Rich Steel during Partitioning in a Q & P Process |
| title_full_unstemmed | Metastable Austenite Transformation Kinetics of Medium-Carbon Silicon-Rich Steel during Partitioning in a Q & P Process |
| title_short | Metastable Austenite Transformation Kinetics of Medium-Carbon Silicon-Rich Steel during Partitioning in a Q & P Process |
| title_sort | metastable austenite transformation kinetics of medium carbon silicon rich steel during partitioning in a q p process |
| topic | medium-carbon silicon-rich steel quenching and partitioning process metastable austenite transformation kinetics |
| url | https://www.mdpi.com/2075-4701/10/6/738 |
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