（1. Cold Metal Department，Shougang Jingtang United Iron and Steel Co.， Ltd.， Tangshan 063200，Hebei，China 2. Metallurgy Process Research Institute，Shougang Research Institute of Technology，Beijing 100043，China）
Abstract：For a series of problems such as the deceleration and stagnation of production line and the strip broken of ultra wide strip in continuous annealing furnace caused by wandering， the current study firstly determined that the initial flatness of strip was the key factor leading to wandering based on field experiment. Meanwhile， in order to quantitatively analyze the relationship between the initial flatness of ultra wide strip and the strip wandering in continuous annealing furnace， the offline data detected by flatness meter was recognized with shape basic pattern including third-order term， and then the influence of separate order of basic pattern flatness on the strip wandering in continuous annealing furnace was statistically analyzed. Finally， according to the relationship between actual field tracking of strip wandering and flatness data of separate order recognition， the control standard of strip flatness and process institution of continuous annealing furnace were formulated to prevent the strip wandering. Practical application results show that the monthly wandering rates of ultra wide strip decreased from 72.5% to 12.7%，and the line stagnation and strip broken accident caused by strip wandering never happened again， which had achieved great economic and social benefits.
2016, Vol. 51 
