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Research and application of approximate rectangular section control technology in hot strip mills
Journal of Iron and Steel Research International ( IF 2.5 ) Pub Date : 2021-02-24 , DOI: 10.1007/s42243-021-00558-6
Hai-nan He , Jian Shao , Xiao-chen Wang , Quan Yang , Yang Liu , Dong Xu , You-zhao Sun

Profile requirements of silicon steel strip are extremely high and the thickness difference of cold-rolled products is usually less than 7 μm, and the profile quality of hot-rolled strip is the key to ensure the thickness difference of cold-rolled products. In order to produce the silicon steel strip with high-precision shape, the concept of quasi-rectangular rolling during hot continuous rolling was put forward; the equipment configuration and technical method of approximate rectangular section control were studied. Through the roughing multi-target load distribution technology and the roll configuration technology for uniform wear of a 4-high rolling mill, the strip crown of transfer bar was reduced and the profile control stability was guaranteed. Configuring variable contact back-up roll technology on all stands in the finishing rolling process, equipped with symmetry variable taper work roll and long-stroke intelligent shifting strategy in the downstream stands, and using side rolling lubrication technology can make the roll wear more uniform, reduce the edge drop of silicon steel strip, improve the profile quality, and make the strip section of finishing exit "quasi-rectangular". In addition, induction furnace and side heater were also equipped to guarantee the temperature uniformity of the strip, so as to improve the stability of profile control. The whole control technology is based on the 1580-mm hot continuous rolling production line, designed, and developed according to the characteristics of equipment and products, and has been successfully applied, which can obtain the approximate rectangular strip section satisfying the flatness quality, and improve the strip section precision of silicon steel and other products.



中文翻译:

热轧机近似矩形截面控制技术的研究与应用

硅钢带的型材要求极高,冷轧产品的厚度差通常小于7μm,而热轧带材的型材质量是确保冷轧产品厚度差的关键。为了生产高精度形状的硅钢带,提出了热连轧过程中准矩形轧制的概念。研究了近似矩形截面控制的设备结构和技术方法。通过采用多目标粗加工负荷分配技术和4辊轧机均匀磨损的轧辊配置技术,减少了转移棒的带材凸度,并保证了轮廓控制的稳定性。在精轧过程中的所有机架上配置可变接触支承辊技术,在下游机架上配备对称可变锥度工作辊和长行程智能换挡策略,并使用侧轧润滑技术可使辊磨损更均匀,减少硅钢带的边缘下降,提高型材质量,并使精轧出口的钢带截面为“准矩形”。另外,还配备了感应炉和侧加热器,以保证带材的温度均匀性,从而提高型材控制的稳定性。整个控制技术基于1580毫米热连轧生产线,根据设备和产品的特点进行设计和开发,并已成功应用,

更新日期:2021-02-24
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