Influence of vanadium on the microstructure refinement of high strength automobile beam steel
The effects of vanadium on the microstructure refinement of automobile beam steel with a yield strength of 700 MPa were investigated by Gleeble-3500 Thermo Simulator, scanning electron microscopy, transmission electron microscopy and electron back-scattered diffraction. The results show that a mixtu...
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| Format: | Article |
| Language: | zho |
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Science Press
2016-08-01
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| Series: | 工程科学学报 |
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| Online Access: | http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2016.08.009 |
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| author | LI Yong-liang WANG Fu-ming LI Zhang-rong YANG Zhan-bing HE Yu-tian ZHENG Ya-xu |
| author_facet | LI Yong-liang WANG Fu-ming LI Zhang-rong YANG Zhan-bing HE Yu-tian ZHENG Ya-xu |
| author_sort | LI Yong-liang |
| collection | DOAJ |
| description | The effects of vanadium on the microstructure refinement of automobile beam steel with a yield strength of 700 MPa were investigated by Gleeble-3500 Thermo Simulator, scanning electron microscopy, transmission electron microscopy and electron back-scattered diffraction. The results show that a mixture structure of acicular ferrite and granular bainite can be obtained in a cooling rate range of 2 to 7℃·s-1. It is recognized that the volume fraction of granular bainite increases and the microstructure can be refined by adding vanadium. After the addition of vanadium, the size of M/A islands decreases obviously. Compared to the V-free steel, high angle grain boundaries in the V-bearing steel increases by 18.2%, indicating a potential improvement in toughness. No VC precipitation is observed in the tested steel due to low carbon content, so it can be deduced that V in the solid solution can promote the bainite transformation and refine the microstructure. |
| format | Article |
| id | doaj-art-7f8411af70934f28b24bf5ea6ee93cea |
| institution | OA Journals |
| issn | 2095-9389 |
| language | zho |
| publishDate | 2016-08-01 |
| publisher | Science Press |
| record_format | Article |
| series | 工程科学学报 |
| spelling | doaj-art-7f8411af70934f28b24bf5ea6ee93cea2025-08-20T01:47:51ZzhoScience Press工程科学学报2095-93892016-08-013881108111410.13374/j.issn2095-9389.2016.08.009Influence of vanadium on the microstructure refinement of high strength automobile beam steelLI Yong-liang0WANG Fu-ming1LI Zhang-rong2YANG Zhan-bing3HE Yu-tian4ZHENG Ya-xu51. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;The effects of vanadium on the microstructure refinement of automobile beam steel with a yield strength of 700 MPa were investigated by Gleeble-3500 Thermo Simulator, scanning electron microscopy, transmission electron microscopy and electron back-scattered diffraction. The results show that a mixture structure of acicular ferrite and granular bainite can be obtained in a cooling rate range of 2 to 7℃·s-1. It is recognized that the volume fraction of granular bainite increases and the microstructure can be refined by adding vanadium. After the addition of vanadium, the size of M/A islands decreases obviously. Compared to the V-free steel, high angle grain boundaries in the V-bearing steel increases by 18.2%, indicating a potential improvement in toughness. No VC precipitation is observed in the tested steel due to low carbon content, so it can be deduced that V in the solid solution can promote the bainite transformation and refine the microstructure.http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2016.08.009high strength steelvanadiummicrostructurecrystal orientationhigh angle grain boundaries |
| spellingShingle | LI Yong-liang WANG Fu-ming LI Zhang-rong YANG Zhan-bing HE Yu-tian ZHENG Ya-xu Influence of vanadium on the microstructure refinement of high strength automobile beam steel 工程科学学报 high strength steel vanadium microstructure crystal orientation high angle grain boundaries |
| title | Influence of vanadium on the microstructure refinement of high strength automobile beam steel |
| title_full | Influence of vanadium on the microstructure refinement of high strength automobile beam steel |
| title_fullStr | Influence of vanadium on the microstructure refinement of high strength automobile beam steel |
| title_full_unstemmed | Influence of vanadium on the microstructure refinement of high strength automobile beam steel |
| title_short | Influence of vanadium on the microstructure refinement of high strength automobile beam steel |
| title_sort | influence of vanadium on the microstructure refinement of high strength automobile beam steel |
| topic | high strength steel vanadium microstructure crystal orientation high angle grain boundaries |
| url | http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2016.08.009 |
| work_keys_str_mv | AT liyongliang influenceofvanadiumonthemicrostructurerefinementofhighstrengthautomobilebeamsteel AT wangfuming influenceofvanadiumonthemicrostructurerefinementofhighstrengthautomobilebeamsteel AT lizhangrong influenceofvanadiumonthemicrostructurerefinementofhighstrengthautomobilebeamsteel AT yangzhanbing influenceofvanadiumonthemicrostructurerefinementofhighstrengthautomobilebeamsteel AT heyutian influenceofvanadiumonthemicrostructurerefinementofhighstrengthautomobilebeamsteel AT zhengyaxu influenceofvanadiumonthemicrostructurerefinementofhighstrengthautomobilebeamsteel |