On-line detection and control method of mechanical properties of steel strip in skin pass process
A technology of mechanical properties, detection and control, applied in the field of strip rolling, can solve the problems of difficulty in ensuring the mechanical properties of strip steel, long-term hysteresis, etc.
Active Publication Date: 2017-01-18
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology
The mechanical performance parameters obtained by this offline detection can only be used to guide the adjustment of the production process or the adjustment of the material composition, and it has a long time lag
At the same time, due to the discontinuity of sampling and offline detection, it is impossible to obtain the performance parameters of the strip steel in the production process online, and in general, only the head or tail of the rolled strip steel can be sampled and tested, so it is difficult to ensure that the strip steel The mechanical performance indicators of all places in the length direction of the whole roll are within the range required by the user
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Embodiment 1
[0022] A method for on-line detection and control of mechanical properties of steel strips in the leveling process, comprising the following steps:
[0023] Step 1, at first select the relevant parameters of the smoothing process as the model input, and use the mechanical performance parameters of the strip as the model output to establish a three-layer BP neural network model of the corresponding relationship between the relevant parameters of the smoothing process and the mechanical properties of the strip; in this implementation In the example, there are 11 parameters used as model input, which are carbon equivalent of steel type C d , annealing temperature T e , leveling rolling force per unit width p, leveling entrance tensile stress σ 0 , the leveling outlet should be tension σ 1 , leveling speed v, work roll diameter D w , leveling solution concentration C, strip thickness h, leveling roll rolling kilometer L, actual leveling elongation ε; there are two parameters as...
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Abstract
The invention relates to the field of plate and strip rolling, in particular to a plate and strip leveling quality control method. According to a strip steel mechanical performance online detection and control method in the leveling process, firstly, a model input quantity and a model output quantity are selected and used, and a three-layer BP neural network model of the corresponding relation between leveling process relative parameters and strip steel mechanical performance is built; according to strip steel of a specific steel type, measured values of n groups of the leveling process relative parameters and measured values of strip steel mechanical performance parameters are collected and recorded to serve as training samples of the neural network model, learning and training are performed on a neural network by means of the BP method, and in other words, a mechanical performance forecast model of the strip steel of the steel type is obtained; by means of the mechanical performance forecast model, online control of strip steel mechanical performance in the leveling process is achieved. The leveling process parameters are adjusted according to the judgment result of a mechanical performance forecast value, online control of the strip steel mechanical performance parameters is achieved, and accordingly a strip steel material small in yield ratio can be obtained, and good forming performance of the strip steel is kept.
Description
technical field [0001] The invention relates to the field of strip rolling, in particular to a method for controlling flattening quality of strips. Background technique [0002] In the current cold-rolled strip production practice, the usual way to monitor the mechanical properties of the strip is to conduct random inspection and sampling of the strip at the exit of the relevant cold-rolled post-processing unit, and then conduct an offline test on the sample in the analysis and testing laboratory Obtain the mechanical performance parameters of the strip and compare it with the technical requirements of downstream users. If the mechanical properties of the strip steel do not meet the requirements of downstream users, necessary adjustments shall be made to the production process parameters or alloy element composition of the same strip steel in subsequent production. Then sampling, offline analysis and testing, online adjustment of manufacturing process parameters or material...
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IPC IPC(8): B21B37/00
CPCB21B37/00
Inventor 顾廷权姜正连
Owner BAOSHAN IRON & STEEL CO LTD