Temperature control device and temperature control method in direct rolling process of steel

The invention belongs to the technical field of continuous casting billet temperature control in the metallurgical industry, particularly relates to a temperature control device and a temperature control method in the direct rolling process of steel, and solves the problems that a temperature control device and a temperature control method in an existing direct rolling process are large in equipment investment, high in operation and maintenance difficulty and not beneficial to improvement of production efficiency. The temperature control device comprises a flow control system, and a first temperature measuring device, a second temperature measuring device, an infrared sensing device and a cooling pipe frame assembly which are sequentially arranged on one side of the front end of a continuous casting billet inlet of the roughing mill from far to near in the billet drawing direction; the first temperature measuring device is arranged at a continuous casting billet outlet of the continuous casting machine; the s