【摘 要】
:
Further technology improvements to complex mature processes, such as the continuous casting of steel, require a combination of careful laboratory experiments, plant trials on the commercial process, a
【机 构】
:
Mechanical Engineering,University of Illinois at Urbana-Champaign,IL.,USA
论文部分内容阅读
Further technology improvements to complex mature processes, such as the continuous casting of steel, require a combination of careful laboratory experiments, plant trials on the commercial process, and advanced computational models. As computer power increases, computational models are able to contribute more to the understanding, design, and control of these complex processes. Fluid flow models can now include phenomena such as transient behavior during steady casting, including particle transport, capture and removal. Heat flow models can include interfacial slag layer heat, mass and momentum balances, and nonequilibrium crystallization behavior, and can predict slag structure and friction within the mold. Stress models can now make quantitative predictions such as ideal mold taper and maximum casting speed to avoid problems such as off-corner longitudinal cracks. This work will present recent examples of these models, and their comparison with experimental measurements.
其他文献
对梅山生产的热轧冲压用薄板(SPHC、SPHE)进行性能、金相、织构分析,发现冲压开裂及不均匀变形与板卷出现混晶组织和织构不良密切相关,并从热轧工艺上提出了改善冲压性能的方法和途径。
根据板坯连铸机特点,结合低倍、硫印检验结果,分析板坯三角区裂纹的成因,提出三角区裂纹产生的根本原因是浸入式水口造成的结晶器流场与温度场的差异,而成分与设备状况不良也是重要因素。
简述欧洲镀锡用户技术研究的现状及特点,着重介绍欧洲镀锡板用户技术研究的三个主要方向及主要成果:成形技术(两片钢罐成形)、实罐技术和镀锡板涂饰性。同时对比介绍了宝钢镀锡板用户技术研究的现状,提出了与国外先进水平相比目前存在的不足及下一步的研发设想。
Surface morphology of alloy layer of tinplate was studied by scanning electron microscope (SEM) .It was found that the cavity of alloy layer was a critical factor causing rapid decline of the corrosio
应用聚焦离子束技术(FIB)制备合金化热镀锌钢板透射电子显微镜截面样品,再应用透射电子显微镜(TEM)观察截面样品的镀层和基体中存在的各种金属间化合物(相)。观察结果表明,在热镀锌合金化钢板镀层中存在Γ相和δ相。
针对宝钢1550热镀锌生产热镀锌板(GI)和合金化热镀锌板(GA),测定了正常生产运行状态下锌锅中的输入和输出物质平衡,测定了锌锅中垂直和水平方向上的温度和成分分布,并用金相和物理测试手段对锌渣的种类、分布和大小进行了分析,从而直观地描述了宝钢1550锌锅正常生产时的运行状态,有利于理解锌锅的冶金行为和优化控制锌锅的物质平衡。
介绍宝钢电工钢产品质量及新产品开发情况,回顾宝钢电工钢生产技术和质量改进工作,展望宝钢电工钢的发展前景。
通过理论研究和生产实践相结合,在无需改造脱脂、退火、平整、纵剪等工序的前提下,开发出≤0.2 mm极薄带钢(以下简称极薄带钢)生产工艺。通过工艺的优化,拓宽了极薄带钢产品大纲,提高了各机组产能及质量,实现降本增效几千万元,创造了巨大的经济效益和社会效益。
介绍了当前大功率轧机主传动采用的交流调速系统概况以及交交变频,LCI交直交变频.IGCT/IGBT三电平PWM变频等交流调速系统等特点。分析了轧机主传动机电振动的原因及抑制方法。最后阐明中国大功率轧机主传动交流调速系统的现状与发展。
在分析目前铁水预处理工艺利弊的基础上,提出一种全新概念的连续铁水预处理工艺技术,并对相关基础研究结果进行了讨论,进一步研究正在进行中。