Effect of Nb on microstructure and mechanical properties between base metal and high heat input coarse-grain HAZ in a Ti-deoxidized low carbon high strength steel
In this paper, a Ti-deoxidized low carbon high strength steel plate with different Nb content was obtained by thermal mechanical control processing (TMCP) methods. The coarse-grain heat-affected zone (CGHAZ) under high heat input of 300 kJ/cm conditions was simulated. The effects of Nb on microstruc...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422004574 |
| _version_ | 1811260556129075200 |
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| author | Yulong Yang Xiao Jia Yaxin Ma Ping Wang Fuxian Zhu Haifeng Yang Chuan Wang Shuguo Wang |
| author_facet | Yulong Yang Xiao Jia Yaxin Ma Ping Wang Fuxian Zhu Haifeng Yang Chuan Wang Shuguo Wang |
| author_sort | Yulong Yang |
| collection | DOAJ |
| description | In this paper, a Ti-deoxidized low carbon high strength steel plate with different Nb content was obtained by thermal mechanical control processing (TMCP) methods. The coarse-grain heat-affected zone (CGHAZ) under high heat input of 300 kJ/cm conditions was simulated. The effects of Nb on microstructure and mechanical properties in base metal (BM) and CGHAZ were analyzed. The results showed that high content of Nb addition is not conducive to the improvement of toughness, especially in high heat input CGHAZ. A certain amount of Nb inhibites the formation of ferrite, while promotes the bainite transformation with coarse carbides during high heat input welding process. Although high-angle grain boundary has a certain hindrance to the crack propagation, the coarse carbides caused by the enhanced hardenability in Nb-bearing steels stimulates the crack initiation sensitively. Besides, the uneven prior austenite grains may also take responsibility to the deterioration of toughness in Nb-bearing CGHAZ. In general, the content of Nb should be carefully added when impact toughness of CGHAZ is considered during high heat input welding in Ti-deoxidized low carbon high strength steel. |
| first_indexed | 2024-04-12T18:48:14Z |
| format | Article |
| id | doaj.art-9820d4e0963d41b79722c8be3a1252c1 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-12T18:48:14Z |
| publishDate | 2022-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-9820d4e0963d41b79722c8be3a1252c12022-12-22T03:20:32ZengElsevierJournal of Materials Research and Technology2238-78542022-05-011823992412Effect of Nb on microstructure and mechanical properties between base metal and high heat input coarse-grain HAZ in a Ti-deoxidized low carbon high strength steelYulong Yang0Xiao Jia1Yaxin Ma2Ping Wang3Fuxian Zhu4Haifeng Yang5Chuan Wang6Shuguo Wang7Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang, 110819, ChinaState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, ChinaState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, ChinaKey Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang, 110819, China; Corresponding author.State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, ChinaRizhao Steel Yingkou Medium Plate Co., LTD., Yingkou, 115005, ChinaRizhao Steel Yingkou Medium Plate Co., LTD., Yingkou, 115005, ChinaRizhao Steel Yingkou Medium Plate Co., LTD., Yingkou, 115005, ChinaIn this paper, a Ti-deoxidized low carbon high strength steel plate with different Nb content was obtained by thermal mechanical control processing (TMCP) methods. The coarse-grain heat-affected zone (CGHAZ) under high heat input of 300 kJ/cm conditions was simulated. The effects of Nb on microstructure and mechanical properties in base metal (BM) and CGHAZ were analyzed. The results showed that high content of Nb addition is not conducive to the improvement of toughness, especially in high heat input CGHAZ. A certain amount of Nb inhibites the formation of ferrite, while promotes the bainite transformation with coarse carbides during high heat input welding process. Although high-angle grain boundary has a certain hindrance to the crack propagation, the coarse carbides caused by the enhanced hardenability in Nb-bearing steels stimulates the crack initiation sensitively. Besides, the uneven prior austenite grains may also take responsibility to the deterioration of toughness in Nb-bearing CGHAZ. In general, the content of Nb should be carefully added when impact toughness of CGHAZ is considered during high heat input welding in Ti-deoxidized low carbon high strength steel.http://www.sciencedirect.com/science/article/pii/S2238785422004574High heat inputTMCPCoarse-grain HAZNb additionToughness |
| spellingShingle | Yulong Yang Xiao Jia Yaxin Ma Ping Wang Fuxian Zhu Haifeng Yang Chuan Wang Shuguo Wang Effect of Nb on microstructure and mechanical properties between base metal and high heat input coarse-grain HAZ in a Ti-deoxidized low carbon high strength steel Journal of Materials Research and Technology High heat input TMCP Coarse-grain HAZ Nb addition Toughness |
| title | Effect of Nb on microstructure and mechanical properties between base metal and high heat input coarse-grain HAZ in a Ti-deoxidized low carbon high strength steel |
| title_full | Effect of Nb on microstructure and mechanical properties between base metal and high heat input coarse-grain HAZ in a Ti-deoxidized low carbon high strength steel |
| title_fullStr | Effect of Nb on microstructure and mechanical properties between base metal and high heat input coarse-grain HAZ in a Ti-deoxidized low carbon high strength steel |
| title_full_unstemmed | Effect of Nb on microstructure and mechanical properties between base metal and high heat input coarse-grain HAZ in a Ti-deoxidized low carbon high strength steel |
| title_short | Effect of Nb on microstructure and mechanical properties between base metal and high heat input coarse-grain HAZ in a Ti-deoxidized low carbon high strength steel |
| title_sort | effect of nb on microstructure and mechanical properties between base metal and high heat input coarse grain haz in a ti deoxidized low carbon high strength steel |
| topic | High heat input TMCP Coarse-grain HAZ Nb addition Toughness |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422004574 |
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