WANG Qian1，PAN Hong-bo2，YAN Jun2，SUN Wei3，GUO Zhan3
1. School of Metallurgical Engineering， Anhui University of Technology， Ma’anshan 243002， Anhui， China 2. School of Engineering Research Institute， Anhui University of Technology， Ma’anshan 243002， Anhui， China 3. Technology Center of Maanshan Iron and Steel Group Co.， Ma’anshan 243000， Anhui， China
Abstract：According to the characteristics of water cooling process of cryogenic rebars， convective heat transfer coefficients of cryogenic rebar with different sizes were achieved by means of measured data and theoretical analysis. Based on the industrial trial results， the water cooling process of cryogenic rebar was investigated using MSC. marc finite element software. The effect of parameters， such as water flow， finishing rolling temperature， water cooling time on temperature field and microstructure transformation of cryogenic rebar were studied. The results show that when the cooling water flow is 120 m3/h， pearlitic transformation doesn’t occur in the center of steel rebar； when the cooling water flow is 400 m3/h， there is no ferrite transformation in the center of steel rebar； when the cooling water flow is 160-200 m3/h， the center of steel rebar has composite microstructure consisting of acicular ferrite and bainite. When the finishing rolling temperature rises by about 50 ℃， the surface temperature of steel rebar rises by about 10 ℃ and self-tempering temperature of steel rebar rises by about 30 ℃. When cooling water flow is 200 m3/h and cooling time is 1.2 s， the microstructure of steel rebar consists of acicular ferrite and fine bainite in the 1 050 ℃ finishing rolling. Under the condition of same water pressure and water flow， with the increase of finishing rolling velocity， the hardening layer depth decreases， and self-tempering temperature increases.
收稿日期: 2014-10-19
出版日期: 2015-07-06
引用本文:
王 倩，潘红波，阎 军，孙 维，郭 湛. 低温钢筋穿水冷却工艺[J]. 钢铁, 2015, 50(7): 69-76.
WANG Qian，PAN Hong-bo，YAN Jun，SUN Wei，GUO Zhan. Water cooling process for cryogenic rebars. Iron and Steel, 2015, 50(7): 69-76.
Obata Y, Noda N. Unsteady thermal stresses in a functionally gradient material plate(Analysis of one dimensional unsteady heat transfer problem)[J]. Trans,JIME,1993,59(560):1090-1096.
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Obata Y, Noda N. Unsteady thermal stresses in a functionally gradient material plate(Analysis of one dimensional unsteady heat transfer problem)[J]. Trans,JIME,1993,59(560):1090-1096.
2015, Vol. 50 
