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冷轧带钢平整机关键技术研究电子书
摘 要
本文以冷轧带钢平整机关键技术为研究对象，对平整过程中的重点问题进行了理论和实验的研究，其结果对于掌握平整机成套设备研制技术具有重要的理论价值和实际意义。冷轧退火后的带钢在平整过程中产生横折印缺陷，严重影响平整后带钢的表面质量及其机械性能。通过分析带钢经过张力辊时的受力过程，研究横折印缺陷的产生机理和影响因素，认为退火后的屈服平台和平整机入口前的带钢表面拉应力过大是带钢表面产生横折印缺陷的根本原因。并从工艺角度入手，制定合理的延伸率和力制度，严格来料质量要求，有效的避免了横折印缺陷的产生。冷轧带钢平整过程存在带材较薄，压下率较小等特点，应力状况较为复杂，采用传统模型对轧制力预报误差较大。采用神经网络模型对应力状态系数进行预报，可提高轧制力的预报精度。针对轧制过程中轧件特性发生缓慢变化的特点，采用符合平整轧制过程特点的变形抗力自适应模型，并与应力状态系数神经网络模型结合，预报平整轧制力，具有较高的计算精度。在平整轧制力模型的基础上，建立了平整延伸率控制模型，采用轧制力和张力两种方式对延伸率进行调节，提出了一种控制方式选择的新方法，并应用于凌钢900mm 平整机组，控制效果良好。为有效提高平整机的板形控制能力，降低弯辊负担和轧辊损耗，采用非圆弧轧辊理论，以带材出口板形最好为目标，开发了一套冷轧带钢平整机支撑辊辊型优化模型。将优化结果应用于凌钢900mm 平整机，结果表明，轧机的板形控制能力明显增强，弯辊力与轧制力降低，同时由于辊间接触压力分布更为合理，支撑辊的辊耗也相应减小。改善带钢的力学性能是平整的主要目的之一。在来料情况一定的情况下，平整后带钢的机械性能主要受平整延伸率的影响。通过拉伸实验得到带钢在不同压下率下的力学性能，并进行回归处理，得到了退火带钢压下率与力学性能的关系，为带钢压下率的设定提供了理论依据。
关键词 平整；横折印；轧制力；延伸率；板形；辊型优化；拉伸特性

目录
摘要···································································································································I
Abstract ·························································································································· II
第 1 章绪论 ···················································································································· 1
1.1 课题研究的意义与工程背景··············································································· 1
1.2 冷轧板带轧机轧制理论的研究现状··································································· 2
1.2.1 国内外冷带钢轧机发展现状········································································· 2
1.2.2 金属模型研究进展························································································· 3
1.2.3 辊系弹性变形模型研究进展········································································· 8
1.3 冷轧板带轧机控制技术的研究现状··································································· 9
1.3.1 板带纵向厚差控制及相关技术的发展························································· 9
1.3.2 板形控制技术研究进展··············································································· 10
1.4 本文的研究内容································