连铸结晶辊镀层对薄带传热和凝固组织的影响
Effect of Coating of Continuous Casting Crystallization Roller on Heat Transfer and Solidification Structure
摘 要
使用自主开发的界面传热模拟装置模拟了钢液在薄带连铸结晶辊表面的凝固过程, 研究了结晶辊表面有无镀层、镀层成分和厚度对薄带传热和凝固组织的影响。结果表明: 结晶辊表面引入镀层后可以降低界面热流, 提高凝固组织的均匀性; 镀层成分对传热影响不明显; 镀层厚度的增大会加剧界面热流的下降, 可能导致凝固壳表面缺陷。
镀层
界面传热
热流密度
crystallization roller
coating
interfacial heat transfer
heat flux density
Abstract
The solidification process of the molten steel on the surface of continuous casting crystallization roller was simulated by self-developed interfacial heat transfer simulator. The influences of the crystallization roller surface coating and its composition as well as thickness on heat transfer and solidification structure of the crystallization roller were studied. The results show that with a coating on the crystallization roller surface, heat flux of the interface would decrease and solidification structure uniformity would be improved. Coating composition had no obvious effect on heat transfer. With increasing the coating thickness, the decline of heat flux aggravated, which could lead to surface defects on the solidification shells.
中图分类号 TG142.1
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收稿日期 2010/1/17
修改稿日期 2010/12/7
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备注张杰(1984-), 男, 上海人, 硕士研究生。
引用该论文: ZHANG Jie,ZHANG Wei,WANG Cheng-quan,YU Yan,FANG Yuan. Effect of Coating of Continuous Casting Crystallization Roller on Heat Transfer and Solidification Structure[J]. Materials for mechancial engineering, 2011, 35(3): 95～99
张杰,张卫,王成全,于艳,方园. 连铸结晶辊镀层对薄带传热和凝固组织的影响[J]. 机械工程材料, 2011, 35(3): 95～99
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参考文献
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【3】方园,崔健,于艳,等.宝钢薄带连铸技术发展回顾与展望[J].宝钢技术,2009(B7):83-89.
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【5】JEONG Seong-in, PARK Sung-jin, LEE Dae-sung. Casting roll of twin roll type strip caster and surface treatment method thereof: US,20100243193[P].2010-09-30.
【6】PEDRO G Q, ROBERRTO P. A technique for the evaluation of instantaneous heat fluxes for the horizontal strip casting of aluminum alloys[J].ISIJ International,2001,41(11):1340-1349.
【7】BECK J V, BLACKWELL B, HAJI-SHEIKH A. Comparison of some inverse heat conduction methods using experimental data[J].Int J Heat Mass Transfer,1996,39:3649-3657.
【8】KIN H K, OH S I. Evaluation of heat transfer coefficient during heat treatment by inverse analysis[J].Journal of Materials Processing Technology,2001,112:157-165.
【9】EVANS T, STREZOV L. Interfacial heat transfer and nucleation of steel on metallic substrates[J].Metallurgical and Materials Transactions B,2000,31(5):1081-1089.
【10】HA Man-jin, CHOI Ju-tae, JEONG Seong-in. Analysis and prevention of microcracking phenomenon occurring during strip casting of an AISI 304 stainless stee[J].Metallurgical and Materials Transactions A,2002,33:1487-1497.
【11】马庆芳,方荣生.实用热物理性质手册[M].北京:中国农业机械出版社,1976.
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