To obtain the good flatness of hot-rolled stainless-steel strips, high-precision shape control has always been the focus of research. In hot rolling, the quadratic wave (centre buckle and edge wave) can usually be controlled effectively. However, the quarter buckle of the strip is still a challenge to solve. In this paper, a prediction model of roll deflection and material flow is established to study the change rule and control technology of the quarter buckle. The effects of the process parameters on the quarter buckle are analysed quantitatively. The process parameters affect the quarter buckle and the quadratic wave simultaneously. This coupling makes the control of the quarter buckle difficult. The distribution of lateral temperature and the quartic crown of the strip have less effect on the quadratic wave but have a great effect on the quarter buckle. Finally, a new technology for work roll contour is developed to improve the quarter buckle. Through industrial application, the model and the new contour are proved to be effective.

中文翻译：

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热轧不锈钢四分之一扣的预测与控制技术

为了获得热轧不锈钢带的良好平直度，高精度的形状控制一直是研究的重点。在热轧中，通常可以有效地控制二次波（中心弯曲和边波）。然而，带的四分之一扣仍然是要解决的挑战。本文建立了轧辊挠度和物料流量的预测模型，以研究四分之一扣的变化规律和控制技术。定量分析了工艺参数对四分之一扣的影响。工艺参数同时影响四分之一弯曲和二次波。这种耦合使四分之一带扣的控制变得困难。条带的横向温度分布和四次弯曲对二次波的影响较小，但对四分之一弯曲的影响较大。最后，开发了一种用于工作辊轮廓的新技术来改善四分之一扣。通过工业应用，证明该模型和新轮廓是有效的。