| 连铸二冷区温度波动下的第二相粒子析出行为 |
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| 引用本文： | 孙彦辉,董健,金吉男,付少朋,朱雪珍.连铸二冷区温度波动下的第二相粒子析出行为[J].北京科技大学学报,2016(Z1):90-95. |
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| 作者姓名： | 孙彦辉 董健 金吉男 付少朋 朱雪珍 |
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| 作者单位： | 1. 北京科技大学钢铁共性技术协同创新中心,北京,100083;2. 浙江青山钢铁有限公司,青田,323900 |
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| 基金项目： | 国家自然科学基金资助项目(51274032 |
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| 摘 要： | 采用Gleeble-3500热循环模拟试验机研究了PQ700热轧高强钢铸坯表面温度为800~1200益时温度波动对第二相粒子析出的影响,并利用Thermo-calc热力学软件计算PQ700连铸过程中第二相粒子的析出规律。结果表明：温度大于1050益时,由温度波动引起的析出物尺寸变化明显；温度小于900益时,由温度波动引起的析出物数量变化明显；Nb的含量变化对析出相( Nb,Ti) C摩尔分数影响较大；Ti的含量变化对析出相Ti( C,N)有很大影响。
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| 关 键 词： | PQ700钢 连铸坯 析出相 热力学 |
Precipitation behavior of the second phase particles at secondary cooling zone with temperature fluctuations |
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| SUN Yan-hui,DONG Jian,JIN Ji-nan,FU Shao-peng,ZHU Xue-zhen.Precipitation behavior of the second phase particles at secondary cooling zone with temperature fluctuations[J].Journal of University of Science and Technology Beijing,2016(Z1):90-95. |
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| Authors: | SUN Yan-hui DONG Jian JIN Ji-nan FU Shao-peng ZHU Xue-zhen |
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| Abstract: | Influence of temperature fluctuations on the precipitated second phase was studied by using a Gleeble-3500 thermal simulator, when the surface temperature of PQ700 hot rolled high strength steel slab is from 800 to 1200℃. Precipitation of the second phase particles of PQ700 in the continuous casting process was calculated by using the thermodynamic software Thermo-calc. The re-sults show that when temperature is more than 1050℃, precipitate size caused by the temperature fluctuations changes significantly. When temperature is less than 900℃, the number of precipitation caused by the temperature fluctuations changes significantly. The change of Nb content has a great influence on the mole fraction of ( Nb,Ti) C. The change of Ti content has a great influence on the mole fraction of Ti( C,N) . |
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| Keywords: | PQ700 steel continuous cast slabs precipitates thermodynamic |
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