学术论文

      连铸二冷区温度波动下的第二相粒子析出行为

      Precipitation behavior of the second phase particles at secondary cooling zone with temperature fluctuations

      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。
      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) .
      作者: 孙彦辉 [1] 董健 [1] 金吉男 [2] 付少朋 [2] 朱雪珍 [2]
      Author: SUN Yan-hui [1] DONG Jian [1] JIN Ji-nan [2] FU Shao-peng [2] ZHU Xue-zhen [2]
      作者单位: 北京科技大学钢铁共性技术协同创新中心,北京,100083 浙江青山钢铁有限公司,青田,323900
      刊 名: 工程科学学报 ISTICEIPKU
      年,卷(期): 2016, 38(z1)
      分类号: TF777.1
      机标分类号: TF7 TG1
      在线出版日期: 2016年7月25日
      基金项目: 国家自然科学基金资助项目