共查询到19条相似文献,搜索用时 62 毫秒
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运用KDD技术对热轧带钢生产中过程机大量历史数据和积累了多年的轧制信息(包括轧制负荷相关的信息)进行预处理和数据挖掘,并结合相应的理论知识,开发了适合现场生产的负荷分配模型.该模型能实施多种功能,并在实践中取得成功应用,实现了负荷分配的自动设定,形成了规范的负荷分配制度.同时给出了负荷分配模型的优化方法. 相似文献
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本文简介了2160mm热轧精轧温度控制模型的操作原理及控制,阐述了利用该模型计算和调节轧制中间坯的轧制条件。 相似文献
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针对攀钢热轧板厂二期改造后精轧设备和工艺条件的变化,对相关的工艺参数和极限进行了调整,从提高热轧产品尺寸精度和性能合格率、降低轧制能耗出发,对精轧工艺和数学模型进行了优化,在生产中取得了显著的效果。 相似文献
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介绍了含铌微合金带钢在精轧过程中的再结晶行为。在不同条件下,含铌钢将发生静态再结晶、动态再结晶和亚动态再结晶,而且沉淀的析出对再结晶有不同程度的影响。 相似文献
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Hot strip rolling process includes four main stages, which are reheating process, roughing and finishing process, laminar‐cooling process, and coiling process respectively. Temperature is the most sensitive parameter and has direct effect on the microstructural evolution and further the mechanical properties, and the accurate control of temperature guarantees the quality of products and homogeneity of properties along the strip length. However, for the conventional hot strip rolling process, thermal history along the strip length is very complex, the related temperature variation concerns air cooling, water cooling, heat transmission by roll contact, heat generation by deformation and friction. Based on the actual hot strip mill, the thermal models are established in this paper to simulate the temperature distribution along the whole strip length from the reheating furnace exit to the down coiler. Different interface heat transmission coefficients are selected for the scale breaking and spray water‐cooling process, and a self‐learning algorithm is thus employed to improve the calculation accuracy. This model is characterized as simple and fast, and convenient for on‐line/off‐line prediction of temperature. Finally the simulated results are verified by the on‐line temperature detection at typical points such as roughing exit (RT2), finishing exit (FT7) and coiling position (CT). 相似文献
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轴承钢GCr15棒材产品低温精轧的研究 总被引:2,自引:0,他引:2
采用国外引进的可实现低温精轧的生产线,对轴承钢GCr15棒材产品进行了低温精轧,通过低温精轧降低了网状碳化物级别,减少了球化退火时间。研究得到了低温精轧轧制GCr15时以控制网状碳化物级别为目标的轧制温度范围为750~840℃,轧后冷却温度范围为600~680℃,同时也研究得到了低温精轧轧制GCr15时以控制网状碳化物级别及减少球化退火时间为目标的轧制温度范围为750~800℃,轧后冷却温度范围为600~680℃。通过该研究网状碳化物级别达到了2级以下,球化退火时间由原18h减少到了11h。 相似文献
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In this paper we propose a new theoretical thermo-mechanical explanation of the uneven transverse temperature distribution, along the width, for thin and wide hot rolled produced strip. In particular, we base our reasoning starting from the irregular pressure/friction distribution, that lead to an uneven heat generation. A 2-D mathematical model to calculate the transverse temperature distribution is presented, both to give a physical explanation to our problem, and to be used as an essential basis to build a correspondent FEM simulation model, in which heat loss and generation are both considered. Deformation and friction heat are both described in details, having a paramount importance in our reasoning. The heat generation problem is split into two parts, for a clearer and more logical analysis: one for the strip centre, and one for the sides, in correspondence of the temperature peak points at 100mm from the strip edge. Finally it is shown how our new theoretical model can lead to the exact interpretation of the measured uneven temperature distribution. 相似文献
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《钢铁研究学报(英文版)》2011,(Z1):625-628
The correlation among finish rolling temperature (FRT),microstructure and mechanical property of the high grade pipeline steel was investigated in this study.The microstructure of the steels with different finish rolling temperatures was observed with scanning electronic microscope (SEM) and transmission electronic microscope (TEM).The martensite/austenite (M/A) islands distribution was fixed by colour metallography,and the mechanical properties of the steels were tested with quasi-static tensile testing machine.The result shows that the fraction of M/A island increased with the finish rolling temperature decreasing,and when the finish rolling temperature is 800℃,the mechanical properties are the best. 相似文献
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