Device for measuring temperature gradient of steel plate in thickness direction in water cooling process and measuring method thereof

Abstract

The invention discloses a device for measuring the temperature gradient of a steel plate in the thickness direction in the water cooling process. The thermocouple temperature is continuously recordedin the cooling process of the steel plate. A continuous temperature curve of the steel plate cooling process along the thickness direction is obtained. Measurement of the temperature gradient in the thickness direction of the steel plate in the cooling process is achieved, experimental data support is provided for setting technological parameters such as the water volume, the water ratio, the water convexity and edge shielding of upper and lower headers in the water cooling process, performance and structure uniformity in the thickness direction of the steel plate are guaranteed, residual stress in the steel plate is reduced, and buckling is reduced.

Description

technical field [0001] The invention belongs to the cooling technology of iron and steel production, in particular to a device for measuring the temperature gradient in the thickness direction of a steel plate in a water cooling process and a measuring method thereof. Background technique [0002] In the prior art, with the application of TMCP control technology and post-normalizing controlled cooling technology, some steel plates requiring controlled cooling enter the controlled cooling equipment for cooling after rolling or normalizing. The core of controlled cooling is to control the phase transformation process of austenite in the hardened state, reduce the phase transformation temperature, control the phase transformation type, refine the phase transformation structure, inhibit the growth of carbonitrides of microalloying elements, and make them disperse and precipitate at low temperature , so as to improve the strength of the steel, keep the toughness of the steel from...

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Problems solved by technology

[0003] At present, relying on simulation or modeling to calculate the temperature gradient in the thickness direction of the steel plate cooling process, formulate the water cooling process; because the actual temperature gradient in the thickness direction of the steel plate cooling process is difficult to measure in real time, the inaccurate calculation of the temperature gradient in the thickness direction of the steel plate leads to deviations in the upper and lower water volumes of the header , affecting the shape and microstructure of water-cooled steel plates

[0004] Therefore, the calculation and measurement method of the temperature gradient in the thickness direction of the steel plate involved in the water cooling process of the existing patented technology has great limitations, and more research in this area is needed

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