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| 铌微合金化控冷工艺生产HRB500抗震钢筋强韧化机理 | |
| 引用本文： | 陈伟,施哲,赵宇.铌微合金化控冷工艺生产HRB500抗震钢筋强韧化机理[J].中南大学学报(自然科学版),2011,42(6). |
| 作者姓名： | 陈伟 施哲 赵宇 |
| 作者单位： | 1. 昆明理工大学冶金与能源工程学院,云南昆明,650093;武钢集团昆明钢铁股份有限公司技术中心,云南昆明,650302 2. 昆明理工大学冶金与能源工程学院,云南昆明,650093 3. 武钢集团昆明钢铁股份有限公司技术中心,云南昆明,650302 |
| 摘 要： | 采用Nb微合金化和控冷工艺开发HRB500抗震钢筋，通过金相显微镜、扫描电镜、透射电镜、X线衍射仪及拉力试验机对钢筋取样金相显微组织、析出相、力学性能及强韧化机理进行分析研究。研究结果表明：采用Nb微合金化和控轧控冷工艺生产HRB500抗震钢筋，最主要的强化机制为细晶强化，其对强度贡献超过40％；采用该工艺，钢筋铁素体晶粒度达11.0级以上，晶粒细化效果明显;铁素体基体、晶界及位错线上形成和分布着尺寸为10～20 nm的大量细小弥散的Nb(CN)析出相，起到了较好的沉淀强化及细化晶粒作用；晶粒细化使冲击转折温度下降150℃，使钢筋在获得较高强度的同时，仍具有较好的塑韧性。 |
| 关 键 词： | HRB500抗震钢筋 细晶强化 Nb(CN) 沉淀强化 塑韧性 |
Strengthening and toughening mechanism of HRB500 anti-seismic rebars with Nb microalloyed and controlled cooling process |
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| CHEN Wei,SHI Zhe,ZHAO Yu.Strengthening and toughening mechanism of HRB500 anti-seismic rebars with Nb microalloyed and controlled cooling process[J].Journal of Central South University:Science and Technology,2011,42(6). | |
| Authors: | CHEN Wei SHI Zhe ZHAO Yu |
| Institution: | CHEN Wei1,2,SHI Zhe1,ZHAO Yu2 (1.Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China,2.Technology Center,Wukun Steel Co Ltd,Kunming 650302,China) |
| Abstract: | Development of HRB500 anti-seismic rebars by Nb microalloyed and controlled cooling process was introduced.The microstructure,educt,mechanical properties,strengthening and toughening mechanism were researched and analyzed by means of metallographic microscopy,scanning electron microcopy,transmission electron microscopy,X-ray diffraction apparatus and tensile testing machine.The results show that fine-grain strengthening is the primary mechanism of strengthening and toughening for HRB500 rebars produced by N... |
| Keywords: | HRB500 anti-seismic rebars fine-grain strengthening Nb(CN) precipitation strengthening plasticity and toughness |
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