| 微量稀土元素对Q235B钢组织和性能的影响 |
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| 引用本文： | 王社斌,李佳军,尹树春,任鸿儒,许并社. 微量稀土元素对Q235B钢组织和性能的影响[J]. 材料科学与工艺, 2011, 19(5): 79-84,89 |
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| 作者姓名： | 王社斌 李佳军 尹树春 任鸿儒 许并社 |
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| 作者单位： | 太原理工大学材料科学与工程学院;太原理工大学新材料界面科学与工程教育部重点实验室;太原理工大学材料科学与工程学院;太原理工大学材料科学与工程学院;太原理工大学材料科学与工程学院;太原理工大学材料科学与工程学院;太原理工大学新材料界面科学与工程教育部重点实验室 |
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| 基金项目： | 国家自然科学基金资助项目(50901048);山西省留学基金资助项目(2008-39) |
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| 摘 要： | 为研究微量稀土元素对Q235B钢的夹杂物形态转化和细晶化及钢材强韧性能的影响,用真空感应炉熔化、精炼、制备了不同微稀土质量分数的钢样,用成分、OM、SEM、EDS和图像分析仪等方法,分析研究了微量稀土元素对Q235B钢微观组织和力学性能的影响.结果表明：在本研究条件下,随稀土量的增加,铁素体晶粒由24μm减小至12μm...
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| 关 键 词： | 金属材料 微稀土元素 Q235B 微观组织 夹杂物 力学性能 |
Effect of micro-RE element on microstructures and mechanical properties of Q235B steel |
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| WANG She-bin,LI Jia-jun,YIN Shu-chun,REN Hong-ru and XU Bing-she. Effect of micro-RE element on microstructures and mechanical properties of Q235B steel[J]. Materials Science and Technology, 2011, 19(5): 79-84,89 |
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| Authors: | WANG She-bin LI Jia-jun YIN Shu-chun REN Hong-ru XU Bing-she |
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| Affiliation: | College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology,Ministry of Education,Taiyuan 030024,China;College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology,Ministry of Education,Taiyuan 030024,China |
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| Abstract: | To study the effect of trace RE on the change of foreign inclusion shape,grain refining and obdurability of Q235B steel,the tested steel samples was refined with the addition of micro-rare earth alloy in a vacuum induction furnace,and optical microscope,SEM,EDS and image analysis were used to analyze the influence of rare earth element on microstructure and mechanical properties.The results show that,when the RE content was 0~36×10-6(mass fraction),with the increase of RE content in the sample,the average ferrite grain size was reduced from 24 to 12 μm,and the structure of pearlite was obviously refined.The multi-angular oxide inclusions were changed into ellipsoidal oxide inclusions,and the strip MnS inclusions were changed into spherical inclusions.The mechanical properties of samples were substantially improved.When the RE content was 36×10-6,the yield strength,tensile strength and impact toughness value are 382 MPa,555 MPa and 172 J/cm2,respectively. |
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| Keywords: | metallic materials rare earth element Q235B microstructure inclusions mechanical properties |
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