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    軋后鋼管冷卻過程中厚度方向溫度變化規(guī)律

    Rule of Temperature Variation of Hot-rolled Steel Pipe along Wall Thickness Direction during Spray Cooling Process

    • 摘要: 采用有限單元法對鋼管外壁射流冷卻方式下厚度方向溫度變化的規(guī)律進行了研究。研究結果表明：采用優(yōu)化控制冷卻策略和冷卻強度能夠實現(xiàn)壁厚20 mm以下鋼管的全面冷卻，滿足鋼管工藝需要；壁厚小于20 mm的鋼管，當傳熱系數(shù)為2 000 W/（m2·℃）時，采用連續(xù)冷卻方式內、外表面與厚度中心最大溫差小于250℃；當傳熱系數(shù)為3 000 W/（m2·℃）時，與連續(xù)冷卻方式相比，采用水冷和空冷循環(huán)進行的間隔型冷卻方式使鋼管內、外表面與厚度中心最大溫差進一步減小。

       

      Abstract: Studied with the FE method is the rule of temperature variation of the steel pipe along the wall thickness direction during the external spray cooling process.The result shows that thanks to the optimized cooling control tactics and the cooling strength as well，steel pipes with W.T.under 20 mm can be overall cooled so as to meet relevant process requirement；and that for such pipes as cooled via continuous cooling process，when surface heat transfer coefficient is 2 000 W/（m2·℃），the maximum temperature difference between the outside/inside surfaces and the wall center is less than 250℃，while in case that the heat transfer coefficient is 3 000 W/（m2·℃），compared with the continuous cooling process，using the water/air alternative circulating cooling process，the said temperature difference can be further reduced.

       

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