Study on precipitation behavior of Ce and Nb during solidification
In order to solve the problem of forming liquid precipitated NbC when Nb is added excessively in high carbon steel. This study proposed to introduce Ce to form Ce-containing inclusions to inhibit the growth of large liquid precipitated NbC. The results show that in the high strength valve spring ste...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424002515 |
| _version_ | 1797247870140678144 |
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| author | Hao Yang Ling Xia Yang Li Changyong Chen Zhouhua Jiang Wenyu Li Haojia Chen |
| author_facet | Hao Yang Ling Xia Yang Li Changyong Chen Zhouhua Jiang Wenyu Li Haojia Chen |
| author_sort | Hao Yang |
| collection | DOAJ |
| description | In order to solve the problem of forming liquid precipitated NbC when Nb is added excessively in high carbon steel. This study proposed to introduce Ce to form Ce-containing inclusions to inhibit the growth of large liquid precipitated NbC. The results show that in the high strength valve spring steel with 0.63 % carbon mass fraction, the large liquid precipitated NbC will be formed only if the mass fraction of Nb exceeds 0.0192 %. When the mass fraction of Ce in steel is higher than 0.0364 %. In addition to the formation of high melting point Ce2O3, Ce2C3 carbide will be precipitated at the end of solidification. And the amount of Ce2C3 precipitation will increase with the increase of Ce mass fraction in steel. Ce2O3 and Ce2C3 have low two-dimensional lattice mismatch degree with NbC. both of them can be nucleation sites of NbC, which lead to multi-point precipitation and avoid aggregation and growth of NbC. However, the content of Ce should not be too high, which will be dominated by the precipitation of Ce, and the best mass fraction of Ce and Nb is between 0.02 % and 0.05 %. |
| first_indexed | 2024-03-08T05:33:54Z |
| format | Article |
| id | doaj.art-55572555792a4532b872a51f89591094 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-24T20:05:33Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-55572555792a4532b872a51f895910942024-03-24T06:57:47ZengElsevierJournal of Materials Research and Technology2238-78542024-03-012922392247Study on precipitation behavior of Ce and Nb during solidificationHao Yang0Ling Xia1Yang Li2Changyong Chen3Zhouhua Jiang4Wenyu Li5Haojia Chen6School of Metallurgy, Northeastern University, Shenyang, 110819, Liaoning, ChinaSchool of Metallurgy, Northeastern University, Shenyang, 110819, Liaoning, ChinaSchool of Metallurgy, Northeastern University, Shenyang, 110819, Liaoning, China; State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, China; Corresponding author. School of Metallurgy, Northeastern University, Shenyang, 110819, Liaoning, China.School of Metallurgy, Northeastern University, Shenyang, 110819, Liaoning, ChinaSchool of Metallurgy, Northeastern University, Shenyang, 110819, Liaoning, China; State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, ChinaSchool of Metallurgy, Northeastern University, Shenyang, 110819, Liaoning, ChinaSchool of Metallurgy, Northeastern University, Shenyang, 110819, Liaoning, ChinaIn order to solve the problem of forming liquid precipitated NbC when Nb is added excessively in high carbon steel. This study proposed to introduce Ce to form Ce-containing inclusions to inhibit the growth of large liquid precipitated NbC. The results show that in the high strength valve spring steel with 0.63 % carbon mass fraction, the large liquid precipitated NbC will be formed only if the mass fraction of Nb exceeds 0.0192 %. When the mass fraction of Ce in steel is higher than 0.0364 %. In addition to the formation of high melting point Ce2O3, Ce2C3 carbide will be precipitated at the end of solidification. And the amount of Ce2C3 precipitation will increase with the increase of Ce mass fraction in steel. Ce2O3 and Ce2C3 have low two-dimensional lattice mismatch degree with NbC. both of them can be nucleation sites of NbC, which lead to multi-point precipitation and avoid aggregation and growth of NbC. However, the content of Ce should not be too high, which will be dominated by the precipitation of Ce, and the best mass fraction of Ce and Nb is between 0.02 % and 0.05 %.http://www.sciencedirect.com/science/article/pii/S2238785424002515CeNbCCe2C3Ce2O365Si2CrVSpring steel |
| spellingShingle | Hao Yang Ling Xia Yang Li Changyong Chen Zhouhua Jiang Wenyu Li Haojia Chen Study on precipitation behavior of Ce and Nb during solidification Journal of Materials Research and Technology Ce NbC Ce2C3 Ce2O3 65Si2CrV Spring steel |
| title | Study on precipitation behavior of Ce and Nb during solidification |
| title_full | Study on precipitation behavior of Ce and Nb during solidification |
| title_fullStr | Study on precipitation behavior of Ce and Nb during solidification |
| title_full_unstemmed | Study on precipitation behavior of Ce and Nb during solidification |
| title_short | Study on precipitation behavior of Ce and Nb during solidification |
| title_sort | study on precipitation behavior of ce and nb during solidification |
| topic | Ce NbC Ce2C3 Ce2O3 65Si2CrV Spring steel |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424002515 |
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