热轧辊形配置对无取向硅钢板形控制性能的影响

通过现场跟踪测试,分析了常规支持辊、常规工作辊和自主开发应用的VCR变接触支持辊和ASR非对称自补偿工作辊在服役期内的辊形变化特点,建立有限元模型分析了常规支持辊/工作辊、变接触支持辊VCR/常规工作辊和变接触支持辊VCR/非对称自补偿工作辊ASR三种代表性热轧辊形配置对硅钢热轧板形控制性能的影响. 与常规辊形配置相比,VCR/ASR新辊形配置的辊缝凸度调节域提高12.79%,辊缝横向刚度提高25.30%,服役前期和后期辊间接触压力峰值分别下降40.23%和41.40%. VCR/ASR新辊形配置在武钢1 700 mm热连轧机连续稳定工业应用表明,无取向硅钢板形质量提高,轧制单位扩大,有效改善工作辊严重磨损对硅钢边降板形控制性能影响.

Effect of roll contour configuration on the flatness control performance of non-oriented electrical steel sheets in hot rolling

The roll contour variation characteristics of conventional backup and work rolls,self-developed VCR(varying contact backup rolls) and ASR(asymmetry self-compensating work rolls) were investigated by industrial test results.The finite element models of three typical roll contour configurations,i.e.conventional backup/work rolls,VCR/conventional work rolls,and VCR/ASR,were developed to calculate the roll stack deformation.The flatness control performance of these roll contour configurations was analyzed.In comparison with the conventional roll contour configuration,the crown control range by roll bending force enhances by 12.79% and the roll gap stiffness increases by 25.30%.The peak values of roll contact pressure in the prophase and anaphase rolling service drop by 40.23% and 41.40%,respectively.The application of VCR/ASR configuration gives better strip profile and flatness quality,an increase in coil number within the rolling campaign and a significant alleviated effect of severe work roll wear contour on the performance of edge drop control in a 1 700 mm hot strip mill at WIS(G)CO of China.