A method for measuring the lateral distribution of surface temperature of hot-rolled intermediate slab

Abstract

The invention discloses a method for measuring the lateral distribution of surface temperature of a hot-rolled intermediate slab, comprising the following steps: S1, determining the radiation rate of the current hot-rolled intermediate slab steel type, and the temperature value T of the transmission side of the hot-rolled intermediate slab D And the temperature value T on the operating side O ; S2, take the thermal image p of the designated position of the hot-rolled intermediate billet through the infrared thermal imager at the exit of the roughing mill directly above the hot-rolled intermediate billet, mark a temperature derivation line in the thermal imaging graph p, and the temperature derivation line along the The width direction of the hot-rolled intermediate slab extends, and the two ends of the temperature derivation line exceed the positions of both sides of the hot-rolled intermediate slab in the thermographic image p; S3. Delete invalid data points on the temperature derivation line. It can more accurately measure the temperature distribution of the hot-rolled intermediate slab along the width direction, thereby providing accurate input parameters for hot roll profile calculation, edge structure prediction, and edge metal flow prediction.

Description

technical field [0001] The invention belongs to the technical field of parameter measurement of hot-rolled strip steel, and more specifically, the invention relates to a method for measuring the lateral distribution of surface temperature of a hot-rolled intermediate slab. Background technique [0002] With the rapid development of China's industry, the demand for strip steel in various industries is increasing, and the requirements for strip steel quality are also more stringent. Temperature is the core parameter of hot-rolled strip steel, which is directly related to force-energy parameters, product structure performance and surface quality. Usually, the hot rolling production line is only equipped with thermometers at the entrance and exit of the roughing mill and the finishing mill to accurately measure the surface temperature of the intermediate billet and the strip. However, the distribution of the surface temperature of the intermediate billet and the strip along the ...

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Problems solved by technology

Usually, the hot rolling production line is only equipped with thermometers at the entrance and exit of the roughing mill and the finishing mill to accurately measure the surface temperature of the intermediate billet and the strip. However, the distribution of the surface temperature of the intermediate billet and the strip along the width direction is uneven. The internal temperature is lower than the temperature at the center of the width, and the thermometer configured on the production line generally only measures the temperature at the center of the width, which cannot reflect the distribution characteristics of the temperature along the width direction

[0003] For this reason, some production lines are equipped with multi-point thermometers at the exit of the finishing mill, which can measure the temperature distribution of multiple points of the strip, but cannot measure the lateral temperature distribution of the intermediate billet at the exit of the roughing mill. It is the edge temperature distribution that is crucial to determine whether there is a structural phase change at the edge and to predict the shape of the hot roll in finishing rolling.

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