共查询到20条相似文献,搜索用时 109 毫秒
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利用铝双辊铸轧过程传热数学模型,系统分析了辊套材料、浇注温度等工艺因素对铝双辊铸轧过程凝固速率的影响及进一步提高铸轧机生产能力的途径,建立了钢和铜合金2种辊套材料的凝固壳厚度随时间变化的计算公式。 相似文献
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针对实验室现有的实验设备条件,建立了双辊铸轧薄带钢过程的有限元数学模型,通过程序开发对熔池内的温度场进行了模拟;给出了各工艺参数对凝固终点位置及铸带表面温度的影响规律,为铸轧过程的分析和控制提供了理论依据。 相似文献
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双辊铸轧薄带过程中的凝固传热现象十分复杂。用交替方向隐式插分法通过VB语言计算了薄带坯的动态温度场,进而模拟了薄带坯的凝固传热过程,对实际生产有重要的参考价值。 相似文献
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《钢铁冶炼》2013,40(1):75-80
AbstractTwin roll strip casting is regarded as a prospective technology offering many economic benefits. The control of fluid flow in the pool is, however, particularly difficult due to the high casting speed and small pool volume. In the present study, a three-dimensional mathematical model has been developed for the coupled analysis of fluid flow, heat transfer and solidification in the pool using the finite difference method. The characteristics of transport phenomena in the pool of a twin roll strip caster using a wedge type melt delivery system were analysed by numerical simulation. The results show that it is desirable for the wedge melt delivery system to provide the uniformity of flow and temperature in the pool to maintain the casting process and improve the strip quality. 相似文献
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A three‐dimensional mathematical model has been developed to simulate turbulent fluid flow, heat transfer and solidification in the pool of a twin‐roll strip caster. A Darcy‐porosity approach was used to study the fluid flow within the mushy solidification zone in the pool. The effect of the heat transfer coefficient and permeability constant on the flow and solidification was also predicted. It was shown that an even flow and temperature distribution of the pool can be obtained by using a suitable feeding system. The heat transfer between the rolls and the solidifying metal has a big influence on the location of the solidification end point. The permeability of the mushy zone is a key factor which affects the flow and solidification in the twin‐roll strip casting process. 相似文献
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MIAO Yu chuan ZHANG Xiao ming WANG Guo dong DI Hong shuang LIU Xiang hua 《钢铁研究学报(英文版)》2001,8(2):16-19
The steel industry is moving ahead along the di-rection of low cost,short process,good quality andlow capital investment. Strip continuous castingwhich can directly cast a thin strip with thicknessless than 10 mm from molten metal and can elimi-nate the expansive and complex hot rolling,is ex-pected to reduce both the capital investment and thecost of production as compared with the convention-al continuous casting process. Among various pro-cesses under development,the twin- roll strip cast-i… 相似文献
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《Baosteel Technical Research》2010,(Z1):91
This article is try to explain or analyze the key technologies of controlling the surface quality of low carbon steel as cast strip through investigation of interface heat transfer between solidified shell and liquid steel.The one of the key technologies of controlling surface quality of low carbon steel as cast strip is through the casting roll surface texture in order to achieve the homogeneous solidification on the casting roll.Another is through forming a thin film on the casting roll surface in order to achieve a balance between rapid solidification and homogeneous solidification.This film formed between the twin roll and the molten steel can be controlled by adjusting the chemical composition and inclusion in liquid steel through controlling the amount of all[O]and free[O]. 相似文献
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《钢铁冶炼》2013,40(5):374-378
AbstractAn experimental study with respect to the influence of electric current pulse (ECP) on the solidification structure of molten silicon steel was investigated with a copper mould designed to simulate the twin roll casting process. The experimental results showed that the application of ECP can increase the proportion of equiaxed grains up to 67·5%. The mechanism of exerting ECP is also discussed. It can be confirmed that the application of ECP on twin roll casting could effectively improve the solidification structure of silicon steel strip. 相似文献
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Thetwinrollstripcastingprocess ,whichcancastmoltensteelinto 1- 5mmstripdirectly ,isat tractingtheattentionofthesteelproducersallovertheworld .Ithasmanyadvantagesoverconventionalstripproducingtechnology ,suchasreducedenergyconsumption ,lowerinvestmentandhigherflexibili ty .Comparedwiththinslabcasting process ,thistechnologycansave 70 %ofproductionandinvest mentcosts[1] ,and producestripswith poorform ability ,suchastoolsteelandsiliconsteelstrips . Thoughtwinrollstripcastinghasbeendevelop ing… 相似文献