Quantitative analysis of microstructure and mechanical properties of Nb–V microalloyed high-strength seismic reinforcement with different Nb additions
HRB500E seismic steel bars are mainly used in high-rise buildings near the seismic zone. The influence of different niobium contents (0–0.023%) on the microstructure and mechanical properties of HRB500E seismic reinforcement was studied. Results showed that the grain size of ferrite was between 3.6...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2021-09-01
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| Series: | High Temperature Materials and Processes |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/htmp-2021-0031 |
| _version_ | 1818487976810774528 |
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| author | Huang Sheng Li Changrong Li Zhiying Zeng Zeyun Zhai Yongqiang Wang Jie Liu Zhanlin Zhuang Changling |
| author_facet | Huang Sheng Li Changrong Li Zhiying Zeng Zeyun Zhai Yongqiang Wang Jie Liu Zhanlin Zhuang Changling |
| author_sort | Huang Sheng |
| collection | DOAJ |
| description | HRB500E seismic steel bars are mainly used in high-rise buildings near the seismic zone. The influence of different niobium contents (0–0.023%) on the microstructure and mechanical properties of HRB500E seismic reinforcement was studied. Results showed that the grain size of ferrite was between 3.6 and 8.3 μm when only V was added. Meanwhile, as the niobium content increases, the ferrite particles are further refined. After adding niobium, the grain contribution increased by 9%. The addition of niobium significantly refined the grain size of HRB500E seismic reinforcement. The second-phase nano-elliptic precipitate is NbC. The precipitated phase is dispersed on the grain boundary and the matrix, and the dislocation density on the matrix promotes the precipitation of NbC particles along the dislocation line. The second-phase precipitation of niobium can form an effective pinning effect and then refine the pearlite spacing. The microhardness and the tensile strength also significantly improved. The yield strength increased from 509 to 570 MPa. |
| first_indexed | 2024-12-10T16:45:11Z |
| format | Article |
| id | doaj.art-609af94824094e3ba49805bc999ccf91 |
| institution | Directory Open Access Journal |
| issn | 2191-0324 |
| language | English |
| last_indexed | 2024-12-10T16:45:11Z |
| publishDate | 2021-09-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | High Temperature Materials and Processes |
| spelling | doaj.art-609af94824094e3ba49805bc999ccf912022-12-22T01:41:05ZengDe GruyterHigh Temperature Materials and Processes2191-03242021-09-0140130030910.1515/htmp-2021-0031Quantitative analysis of microstructure and mechanical properties of Nb–V microalloyed high-strength seismic reinforcement with different Nb additionsHuang Sheng0Li Changrong1Li Zhiying2Zeng Zeyun3Zhai Yongqiang4Wang Jie5Liu Zhanlin6Zhuang Changling7College of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou 550025, ChinaCollege of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou 550025, ChinaCollege of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou 550025, ChinaCollege of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou 550025, ChinaRolling Business Department, Shougang Shuicheng Steel, Liupanshui, Guizhou 553000, ChinaRolling Business Department, Shougang Shuicheng Steel, Liupanshui, Guizhou 553000, ChinaRolling Business Department, Shougang Shuicheng Steel, Liupanshui, Guizhou 553000, ChinaCollege of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou 550025, ChinaHRB500E seismic steel bars are mainly used in high-rise buildings near the seismic zone. The influence of different niobium contents (0–0.023%) on the microstructure and mechanical properties of HRB500E seismic reinforcement was studied. Results showed that the grain size of ferrite was between 3.6 and 8.3 μm when only V was added. Meanwhile, as the niobium content increases, the ferrite particles are further refined. After adding niobium, the grain contribution increased by 9%. The addition of niobium significantly refined the grain size of HRB500E seismic reinforcement. The second-phase nano-elliptic precipitate is NbC. The precipitated phase is dispersed on the grain boundary and the matrix, and the dislocation density on the matrix promotes the precipitation of NbC particles along the dislocation line. The second-phase precipitation of niobium can form an effective pinning effect and then refine the pearlite spacing. The microhardness and the tensile strength also significantly improved. The yield strength increased from 509 to 570 MPa.https://doi.org/10.1515/htmp-2021-0031seismic reinforcementmicrostructureslice spacingyield strength |
| spellingShingle | Huang Sheng Li Changrong Li Zhiying Zeng Zeyun Zhai Yongqiang Wang Jie Liu Zhanlin Zhuang Changling Quantitative analysis of microstructure and mechanical properties of Nb–V microalloyed high-strength seismic reinforcement with different Nb additions High Temperature Materials and Processes seismic reinforcement microstructure slice spacing yield strength |
| title | Quantitative analysis of microstructure and mechanical properties of Nb–V microalloyed high-strength seismic reinforcement with different Nb additions |
| title_full | Quantitative analysis of microstructure and mechanical properties of Nb–V microalloyed high-strength seismic reinforcement with different Nb additions |
| title_fullStr | Quantitative analysis of microstructure and mechanical properties of Nb–V microalloyed high-strength seismic reinforcement with different Nb additions |
| title_full_unstemmed | Quantitative analysis of microstructure and mechanical properties of Nb–V microalloyed high-strength seismic reinforcement with different Nb additions |
| title_short | Quantitative analysis of microstructure and mechanical properties of Nb–V microalloyed high-strength seismic reinforcement with different Nb additions |
| title_sort | quantitative analysis of microstructure and mechanical properties of nb v microalloyed high strength seismic reinforcement with different nb additions |
| topic | seismic reinforcement microstructure slice spacing yield strength |
| url | https://doi.org/10.1515/htmp-2021-0031 |
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