Method for increasing coiling temperature control accuracy of low temperature steel

Abstract

The invention discloses a method for increasing the coiling temperature control accuracy of low temperature steel, in which a laminar flow cooling device is used for cooling band steel. The method comprises the following steps: configuring devices, namely adding a coiling pyrometer with a measuring range from 0 to 1000 DEG C at an outlet of a cooling zone before coiling, and arranging a fan on the pyrometer; configuring parameters of a coiling temperature model according to the coiling pyrometer; carrying out feedback control and self-learning function operating; optimizing self-learning parameters of low-temperature coiled pipe line steel; and optimizing water allocation. In the method, coiling temperature of low temperature pipe line steel is controlled through adding the pyrometer with a measuring range from 0 to1000 DEG C in the existing coiling temperature control device so as to carry out real-time detection on the coiling temperature and optimizing the configuration of corresponding parameters of coiling temperature model files, thereby effectively improving the control accuracy of the coiling temperature control device to the coiling temperature of low-temperature steel, stabilizing a control system and the coiling temperature model, stabilizing the product quality, and effectively reducing the number of steel coils with unqualified performances caused by the fluctuation of coiling temperature.

Description

technical field [0001] The invention belongs to the technical field of laminar flow cooling of hot-rolled strip steel, and particularly provides a method for improving the temperature control accuracy of low-temperature steel coiling. Background technique [0002] In the production process of hot-rolled strip steel, it is necessary to use a laminar flow cooling device to cool the strip steel after rolling and before coiling. The ideal metallographic structure and mechanical properties can be obtained by controlling the coiling temperature and cooling rate of the strip steel. In order to ensure the best microstructure and mechanical properties of X80 pipeline steel, etc., a low-temperature coiling mode is adopted. [0003] see figure 1 As shown, the figure is a schematic diagram of the basic structure of the cooling zone. The cooling zone is defined from pyrometer C at the finish rolling exit to pyrometer B at the entrance of the underground coiler. The cooling area is di...

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Problems solved by technology

[0015] The purpose of the present invention is to provide a method for improving the control accuracy of the coiling temperature of low-temperature steel, aiming at solving the problem that the feedback control and self-learning function of the temperature coiling temperature model of low-temperature steel cannot be put into normal operation due to the low target coiling temperature And because some functions of the temperature coiling temperature model cannot be put into normal use, the coiling temperature cannot be effectively controlled, so that the coiling temperature fluctuates too much along the entire strip length, and cannot meet the requirements of coiling temperature control accuracy and high mechanical performance stability The problem

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