| 稀土对B450NbRE钢热模拟组织的影响 |
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| 引用本文： | 刘宏亮,刘承军,姜茂发.稀土对B450NbRE钢热模拟组织的影响[J].稀有金属,2011,35(1). |
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| 作者姓名： | 刘宏亮 刘承军 姜茂发 |
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| 作者单位： | 东北大学材料与冶金学院,辽宁,沈阳,110004 |
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| 基金项目： | 国家科技支撑项目，教育部科技重点项目 |
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| 摘 要： | 工业生产中B450NbRE钢冲击韧性不稳定,分析原因在于轧制组织异常.而冶炼时存在稀土收得率不稳定现象,为了研究微量稀土对B450NbRE钢组织和相变的影响,使用真空感应炉冶炼了不同稀土质量分数(0.0010%,0.0046%和0.0160%)的B450NbRE钢,并采用Gleeble-1500热模拟实验机在950℃进行20%和40%的应变,通过对连续冷却过程膨胀数据的测量绘制CCT曲线,结合金相分析研究了稀土对B450NbRE钢组织和相变的影响作用.结果表明,冷却速率小于1℃·s-1时,B450NbRE钢组织以多边形铁素体和贝氏体为主,随着稀土含量的增加,铁索体含量先增加后降低,稀土具有促进多边形铁素体向针状铁索体转变的作用.
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| 关 键 词： | 钢铁冶金 热模拟 B450NbRE钢 组织 稀土 |
Effects of Rare Earth Elements on Thermal Simulation Microstructure of B450NbRE Steel |
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| Liu Hongliang,Liu Chengjun,Jiang Maofa.Effects of Rare Earth Elements on Thermal Simulation Microstructure of B450NbRE Steel[J].Chinese Journal of Rare Metals,2011,35(1). |
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| Authors: | Liu Hongliang Liu Chengjun Jiang Maofa |
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| Affiliation: | Liu Hongliang,Liu Chengjun,Jiang Maofa(School of Materials and Metallurgy,Northeastern University,Shenyang 110004,China) |
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| Abstract: | Studies of B450NbRE steels industrial production suggested that the abnormal microstructure after hot rolled caused the impact toughness of B450NbRE unstable,and it showed that the recovery of rare earth elements was unstable in steel making.The effect of rare earth elements on microstructure and phase transition of B450NbRE steels was discussed.Via vacuum induction furnace produced B450NbRE steels with different rare earth contents(0.0010%,0.0046% and 0.0160%),the CCT curve were tested with Gleeble-1500 si... |
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| Keywords: | metallurgy thermal simulation B450NbRE steels microstructure rare earths |
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