文档介绍：6mm薄规格中厚板稳定性轧制控制策略
摘要:薄规格(6-8mm)中厚板板形控制是中厚板生产中的一大难题。本文分析了武钢中板生产线上影响轧制薄规格钢板板形稳定性的各种因素,包括钢坯加热温度的均匀性、轧制工艺的合理性、机架窗口导板间隙、推床对中性、推床使用模式、轧辊辊型及工作辊雪橇比等,并提出了改善薄规格中板轧制稳定性的措施,目前薄规格钢板板形稳定控制效果良好。
关键词中厚板,薄规格,板形控制
The Shape Stability Control Strategy of Thin-size(6mm) of Medium Plate
Abstract: The shape stability control of thin-size (6-8mm) medium and heavy plate is a difficult problem. In this paper, the various items which influenced the 4-h reversing mill's rolling the thin-size slab in WISCO (Wuhan Iron and Stell Co. Ltd), including the temperature uniformity of plate heating, the rationality of rolling process, the skate gap of housing window, side guider's centering and user mode, roll's shape and sledge ratio, etc, were presented and analyzed, and the corresponding measures were adopted to improve it. During the practical productin, the control strategies including these measures gained a good effect.
Keywords: Medium and Heavy Plate,Thin-size, Shape Stability Control
前言
武钢中厚板厂由于原有设备陈旧、生产品种复杂,生产极限薄规格钢板只能稳定控制在10mm。2012年中厚板设备改造,加上整个中厚板市场产能过剩,普通规格钢板已基本没有太大利润,6-8mm薄规格钢板目前因能批量生产的中厚板厂家不多,还有一定的竞争力。并且中板轧制的薄规格钢板在分切后旁弯非常小,该性能高于热轧开平板,能够满足用户特殊需求。武钢中厚板利用改造后的新设备,不断优化薄规格板形的控制策略,以达到稳定控制板形的效果。
板形精度是中厚钢板生产过程中的一项重要质量指标,对确保产品的实物质量和提高成材率极其重要[1],国内钢铁厂对此开展研究与攻关,并取得了一些成效[2-3]。近年来,液压技术的提高有效地降低了板厚尺寸的偏差,大大提高了中厚板的纵向尺寸精度,然而在中厚板的横向厚度差即板凸度和板形的控制上并不能完全满足用户要求。厚度为
6mm的钢板已经超出武钢中厚板厂3000mm轧机轧制的极限厚度,轧制难度大,轧制过