ABSTRACT

Work roll wear is a key factor that affects the quality of the steel strip during the hot rolling process. With the demand for the same width steel rolling, work roll severe ‘U’ groove type wear appears. In this paper, it is found that work roll surface cannot reach their full potential with the conventional work roll shifting mode, which lead to severe and uneven work roll wear. As a solution, a sinusoidal cyclical shifting mode is proposed, and its effects on roll wear are investigated. As a result, work roll wear can be relocated from the central area to the sides. In the meantime, contact stress peaks reduce significantly in work roll mid and later service periods with a more even wear contour. Moreover, roll fatigue can be improved, while the adjustment range of equivalent work roll crown is not changed with the sinusoidal shifting mode.

摘要

工作辊磨损是热轧过程中影响钢带质量的关键因素。随着同宽度轧钢的需求，工作辊出现严重的“U”槽型磨损。本文发现，采用传统的工作辊换档方式，工作辊表面无法充分发挥其潜力，从而导致工作辊磨损严重且不均匀。作为解决方案，提出了一种正弦循环移位模式，并研究了它对轧辊磨损的影响。因此，工作辊磨损可以从中心区域转移到两侧。同时，接触应力峰值在工作辊中期和后期服役期间显着降低，磨损轮廓更加均匀。此外，可以改善轧辊疲劳，而等效工作辊凸度的调整范围不随正弦变速方式改变。