共查询到18条相似文献,搜索用时 156 毫秒
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直冷连铸工艺中各铸造参数的互相匹配至关重要,通过有限差分方法,用Visual C++6.0建立了超轻LA141合金扁坯连铸过程中三维温度场的数学模型,讨论了各种工艺参数,如拉坯速度、冷却水流量、浇注温度等对凝固过程中板坯温度场的影响,在此基础上优化了超轻合金LA141合金扁坯直冷连铸工艺参数。结果表明:冷却水流量对液穴深度的影响较小,提高浇注温度和拉坯速度使液穴变深,出结晶器时凝固壳层厚度减小。优化后的工艺参数为浇注温度670~700℃,冷却水流量0.8~1.0 m3.h-1,拉坯速度1.0~1.25 mm.s-1。 相似文献
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圆坯连铸机二次冷却区的设计 总被引:1,自引:0,他引:1
本文以包钢圆坯连铸机为例,介绍了二冷区设计方案的合理选择、二冷水配水量的合理控制及二冷区设备的合理布置,同时分析了这些因素对连铸坯质量的影响。 相似文献
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针对传统连铸结晶器效率低、拉坯速度慢、铸坯表面及形状缺陷等问题,设计并加工了一种高效、高速、高质(Efficient,speedy and quality, ESQ)连铸结晶器内腔形线。基于矩形坯结晶器内传热和结晶收缩行为特性,推导并建立了结晶器铜管内腔形线几何模型,运算得到形线曲线表达式和锥度表达式。根据连铸坯热交换收缩组成模型,针对高碳钢材料大矩形坯规格修正原模型及表达式,将优化结果与钢厂传统形线对比分析。依托Matlab/GUI二次开发了结晶器形线尺寸输出系统,为现有钢厂设计并加工了230 mm×170 mm断面U71Mn钢种结晶器芯棒和铜管,保持其他连铸条件基本不变,使现有连铸机拉坯速度从1.1 m/min提高至1.6~1.7 m/min。结果表明,得到的连铸坯产品表面质量与原产品相近,且并无形状缺陷,验证了模型计算的合理性和正确性。相比于传统连铸结晶器内腔形线,新形线曲线提高了结晶器的换热效率,且保证了铸坯质量,这为增加连铸坯产量提供了基础。 相似文献
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Ying-chun Wang Da-yong Li Ying-hong Peng Li-guang Zhu 《The International Journal of Advanced Manufacturing Technology》2007,33(1-2):1-6
A finite difference model was developed and applied to calculate the temperature distribution and solid shell thickness profile
of continuous cast in a steel plant and to control the process of continuous casting. In the developed model, the optimization
module of the water distribution of secondary cooling zone was established according to the metallurgical criterion for billet
and target temperature controlling principle. The quantitative relation expressions of casting speed and water amount can
be regressed by the result data. Meanwhile, the non-linear material properties of specific heat and thermal conductivity as
well as phase changes during solidification were considered in the model. The calculated results of the model were in good
accordance with measured data in the steel plant. Finally, a continuous casting and control system was developed based on
the model. The relations between technology parameters including casting speed, cooling intensity, superheat of melt, and
the casting process were analyzed with the system. The system could also be used to predict the optimum process parameters
and the water distribution of secondary cooling zone on the new steel grade continuous casting. 相似文献
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从虚拟试运行系统和和虚拟培训系统两个方面介绍了虚拟现实技术在国外钢铁工业中的应用。虚拟试运行系统已应用于紧凑式无头连铸连轧产线、电炉设备和薄板坯连铸连轧产线,虚拟培训系统主要应用于高炉、转炉、连铸、热轧和中厚板的生产。通过应用虚拟现实技术,钢铁企业可以节约设备成本,缩短工期,并在试运行、操作和维护阶段测试控制参数,验证控制程序,检查运行状态。 相似文献
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为解决大型钢铁企业对连续重型H型热坯切断的生产需求,设计一种基于可编程逻辑控制器的重型H型钢连铸坯火焰切割生产系统.该系统以西门子S7-1500PLC为控制核心,火焰切割机为执行机构,采用红外摄像定尺技术测量切割长度,使用Wincc7.4设计上位机画面对整条生产线进行实时的监测和控制,实现了对连续异形坯的自动切割,具有... 相似文献