In flatness measuring system,the flatness measuring signal can be affected by the deflection of flatness measuring roll.The stress on flatness measuring roll was analyzed and a deflection model for the flatness measuring roll was obtained by using the influence function method.The model was developed on the basis of the deformation of flatness measuring roll in rolling process and compensation curve was obtained.The results indicated that the set curve of flatness is in good agreement with the online measured curve of flatness,and good strip flatness can be obtained.
LIU Jia-weiZHANG Dian-huaWANG Jun-shengWANG Peng-fei
Fe-3Si steel strip was produced by thin slab casting and rolling(TSCR)process in the laboratory.The microstructure and texture of hot rolled strip by different total reduction and rolling schedules were observed through EBSD technique and X-ray diffraction method.The rule of texture density for the α,ε and γ fibers was analyzed.When the total reduction was increased from 82.9% to 97.1%,the gradient of microstructure and texture for A steel surface layer and center layer was found,{001}<11-0> texture had higher intensity,and {001}<11-0> texture was changed to {110}<001> and {112}<111>.The texture distribution with different reduction schedules for B steel was basically similar,but the Goss texture orientation density and volume fraction for B steel were higher,the hot rolling reduction schedule of C1 was effective for the formation of Goss texture.The research work was useful theoretical basis and reference data to develop electrical steel by thin slab continuous casting and direct rolling technology.
＜正＞In flatness measurement system,the flatness measuring signal can be affected by the flatness roll deflectio...
Liu Jiawei~1,Zhang Dianhua~1,Wang Pengfei~1,Wang Junsheng~2 (1.The State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110004,China
Based on the thermal conduction equations, the three-dimensional (3D) temperature field of a work roll was investigated using finite element method (FEM). The variations in the surface temperature of the work roll during hot strip rolling were described, and the thermal stress field of the work roll was also analyzed. The results showed that the highest roll surface temperature is 593 ℃, and the difference between the minimum and maximum values of thermal stress of the work roll surface is 145.7 MPa. Furthermore, the results of this analysis indicate that temperature and thermal stress are useful parameters for the investigation of roll thermal fatigue and also for improving the quality of strip during rolling.
LI Chang-sheng YU Hai-liang DENG Guan-yu LIU Xiang-hua WANG Guo-dong
