C-Mn钢热轧带奥氏体再结晶晶粒尺寸的预测

在研究板带控轧控冷过程中钢中显微组织演变过程奥氏体再结晶、碳氮化合物析出、奥氏体相变和组织性能对应关系的物理冶金模型的基础上，通过Gleeble-1500热模拟机和计算机模拟计算得出成分(％)0．16C，0．06Si，1．30Mn钢在1173～1081K经7道次热变形后奥氏体晶粒尺寸为43μm，同时实测7道次变形后轧钢组织中奥氏体尺寸为38μm，相对误差13％。计算机模拟计算的奥氏体再结晶晶粒尺寸与实测结果吻合较好。     

热轧Nb-Ti钢静态再结晶组织演变及模型研究

在热模拟实验的基础上，对Nb—Ti微合金钢热轧中微观组织的变化进行了分析，介绍了影响组织演变的主要因素及模拟实验方法，对静态再结晶行为和组织演变过程的数学模型进行了研究。研究表明，预报结果与实验结果吻合较好，这种理论处理方法可用来模拟静态再结晶行为。     

利用小型轧机开发热轧窄带钢的工艺探讨

本文从理论上与实践中探讨出适合小型型钢轧机生产热轧窄带钢的工艺方法。生产实践证明，利用原来生产Φ８－Φ２４ｍｍ元钢和螺纹钢的Χ３５０ｍｍ和Φ２５０ｍｍ小型型钢轧机开发热轧窄带钢不仅投资小，见效快，而且能够获得较好的经济效益，为小型型钢轧机生产开辟了新途径。     

利用小型轧机开发热轧窄带钢的工艺探讨

本文从理论上与实践探讨出适合小型型钢轧机生产热轧窄带钢的工艺方法。生产实践证明，利用原来生产Х８～Х２４ｍｍ元钢和螺纹钢的Х３５０毫米和Х２５０毫米小型型钢轧机开发热轧窄带钢不仅投资小，见效快，而且能够获得较好的经济效益，为小型型钢轧机生产开辟了新途径。     

再结晶软化程度对C-Mn钢变形抗力的影响

利用带钢热连轧的实测条件研究了再结晶软化程度对C-Mn钢变形抗力的影响。结果表明，根据金属的再结晶规律得到的实质应变，比计算“残留应变率”法不但与实测更为接近，而且更符合理论结果；考虑再结晶软化程度对变形抗力的影响后使轧机负荷的预报精度得到明显提高；给出的C-Mn钢静态再结晶模型所得结果与实测符合得较好，从而为控制产品的组织性能提供了奥氏体再结晶的定量化依据。     

Prediction of Rolling Load, Recrystallization Kinetics, and Microstructure During Hot Strip Rolling

 The recrystallization kinetics and grain size models were developed for the C Mn and niobium containing steels to describe the metallurgical phenomenon such as softening, grain growth, and strain accumulation. Based on the recrystallization kinetics equations, the mean flow stress and the rolling load of each pass were predicted and the optimum rolling schedule was proposed for hot strip rolling. The austenite grain refinement is associated with the addition of niobium, the decrease of starting temperature of finish rolling, and the reduction of finished thickness. The mean flow stress curve with a continuous rising characteristic can be usually observed in the finish rolling of niobium containing steel, which is formed as a result of the heavy incomplete softening and strain accumulation. The predicted rolling loads are in good agreement with the measured ones.     

含铌微合金带钢精轧过程中的再结晶行为

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。     

Modelling the Temperature Distribution along the Length of Strip during Hot Rolling Process

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).     

Three-Dimensional Model for Strip Hot Rolling

Steel stripis widely usedin many fields such asautomobile ,building,transportation and householdappliance ,etc·. Withthei mprovement in productiv-ity and automation of strip processing,the require-ments for crown and flatness of strip have been in-creasingly severe ,and“crown free”steel strips arerequired for some special applications such as for au-tomobile parts andtinplate cans .In order toi mprovethe strip quality , an effective three-di mensionalmodel is needful to further study on the…     

热轧窄带钢车间工艺技术改造

山东省张店钢铁厂利用原有设备，对热轧带钢车间的“二火成材”工艺进行半连续化改造，生产２．５～３．５ｍｍ×８０～１５０ｍｍ的热轧窄带钢。实践证明，工艺设计合理，产品质量稳定，且节省了工程投资。     

精确接触边界条件下热轧带钢轧制力的仿真研究

在流面条元法基础上，将带钢与轧辊的接触面视为三维曲面，结合塑性力学中斜面上应力的求解法，给出了接触表面上的精确应力边界条件，建立了单位轧制压力与变形区内部应力的关系，实现了对板带轧制三维应力和变形的精确分析和计算。热轧带钢轧制力的仿真研究结果表明，新算法(改进算法)的计算精度高于旧算法。     

带钢热连轧AGC系统的内在矛盾

对带钢热连轧AGC系统的两种基本控制方式-GM方式与X射线监控方式进行了分析,揭示了它们之间的矛盾及时厚差消除的不利影响,给出了AGC弱控制区的新概念及其基本特点。     

热带钢轧机自由规程轧制技术

为了实现自由规程轧制,结合鞍钢2150ASP流程的工艺特点,开发了粗轧机辊形配置技术、精轧机辊形及板形控制模型配置技术、支持辊润滑系统及夹送辊润滑系统。这些有利于自由规程轧制的技术应用于2150ASP生产线后,在提高热直装率、延长换辊周期及同宽轧制公里数、改善产品板形质量等方面均取得了很好的效果。     

热轧带钢生产新技术及其特点

主要介绍了近年来热轧板带钢生产中采用的一些新技术,对其工艺、设备的技术特点、应用情况进行了系统分析。     

热轧板带无头轧制技术

 分析介绍了热带无头轧制技术在板带高效、高精度轧制中的作用,国外在常规热连轧线上实现无头轧制的技术特点、应用效果及进展,以及最新的ESP技术的特点和最新发展。同时,也简要介绍了国内对热带无头轧制技术的关注以及初步研究探索情况。实践证明,热带无头轧制在减量化板带生产,即低成本大批量生产薄和超薄规格板带,提高板带的组织性能稳定性、均匀性、成材率及板厚板形精度、实现部分“以热代冷”等方面效果显著,是推动节能减排和现代板带轧制技术发展的方向,具有重要的研究开发价值和应用前景。