东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (5): 676-680.DOI: 10.12068/j.issn.1005-3026.2014.05.016

• 材料与冶金 • 上一篇    下一篇

热轧带钢轧后高强度冷却过程的换热系数分析

江连运，袁国，吴迪，王国栋   

  1. (东北大学 轧制技术与连轧自动化国家重点实验室， 辽宁 沈阳110819)
  • 收稿日期:2013-07-25 修回日期:2013-07-25 出版日期:2014-05-15 发布日期:2014-08-18
  • 通讯作者: 江连运
  • 作者简介:江连运(1985-)，男，山东济宁人，东北大学博士研究生;吴迪(1952-)，男，辽宁绥中人，东北大学教授，博士生导师.
  • 基金资助:
    “十二五”国家科技支撑计划项目(2012BAF04B01).

Analysis of Heat Transfer Coefficients During High Intensity Cooling Processes of Hot Rolled Strips After Rolling

JIANG Lianyun， YUAN Guo， WU Di， WANG Guodong   

  1. State Key Laboratory of Rolling and Automation， Northeastern University， Shenyang 110819， China.
  • Received:2013-07-25 Revised:2013-07-25 Online:2014-05-15 Published:2014-08-18
  • Contact: JIANG Lianyun
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摘要： 为了研究基于层流冷却(加强型冷却)和采用有压射流冷却水进行冷却(超快冷)这两种技术方案下冷却强度的差异，采用数值计算方法得到了不同水流密度和冷却方式下带钢表面换热系数，并进行对比分析.结果表明:在水流密度相同时，超快冷的换热系数显著高于加强型冷却;在加强型冷却方式下随着水流密度的提高，带钢表面换热系数也随之升高，当达到一定值后，再次提高水流密度，换热系数会随之降低，但在超快冷方式下，换热系数并未出现明显的下降趋势.

关键词: 超快冷, 加强型冷却, 冷却强度, 水流密度, 换热系数

Abstract: To study the difference of cooling intensity obtained between the two technical methods for cooling the hot rolled strips of laminar cooling (intensive cooling) and using pressurized jet of cooling water for ultral fast cooling(UFC)， a numerical calculation method was used to get heat transfer coefficients between the surface of hot strips and the cooling water under different cooling methods and mass fluxes. By comparison of the results some conclusions were obtained: the cooling capacity of the ultrafast cooling is greater than that of the intensive cooling method with the same mass flux. The heat transfer coefficient of the surface of hot strips increases with the increase of the mass flux and after reached to an certain value， it decreases with the increase of the mass flux when using the intensive cooling method. However the heat transfer coefficient doesn’t decrease obviously when using the ultrafast cooling method.

Key words: ultrafast cooling(UFC), intensive cooling, cooling intensity, mass flux, heat transfer coefficients

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