A hot continuous rolling intermediate billet cooling device and its application method

Abstract

The invention relates to a hot continuous rolling intermediate billet cooling device and an application method thereof, which belong to the field of controlled cooling of hot continuous rolling plate and strip steel. The device includes a rapid cooling system for the intermediate billet, a water supply system and an automatic control system; the rapid cooling system for the intermediate billet is arranged at the conveying roller table of the hot continuous rolling, and the upper header of the rapid cooling system for the intermediate billet is arranged on the conveying roller table of the hot continuous rolling Above; the lower header of the intermediate billet rapid cooling system is arranged on the hot rolling conveying roller table, and is arranged at intervals between adjacent conveying rollers; one end of the water pipe of the water supply pipeline is connected to the upper / lower header, and the other end is connected to the diversion water pipe. According to the arrangement of the device, the method of using the device is divided into (1) installed between the rough rolling and finishing rolling; (2) installed on the side close to the finishing rolling; (3) installed on both sides of the rough rolling. This method solves the problem that the intermediate billet is air-cooled and waits for temperature to reduce the rolling efficiency. At the same time, through the efficient and flexible control of the intermediate billet temperature, it meets the diverse process requirements such as differential temperature rolling, rolling and water cooling coupled controlled rolling. .

Description

technical field [0001] The invention relates to the technical field of controlled cooling of hot continuous rolling strip steel, in particular to a hot continuous rolling intermediate billet cooling device and a method for using the same. Background technique [0002] The hot-rolled plate and strip steel production line rolls high-strength steel and products that require controlled rolling, such as rolling in the ferrite zone, etc., which are limited by the finishing rolling temperature (FET), and need to be air-cooled and warm-rolled in the rough rolling zone to meet The temperature requirements for finishing rolling. However, the problem brought about by air cooling and waiting for temperature is that the rolling production rhythm of the rolling line is greatly reduced, and the production capacity is significantly reduced, which seriously restricts the production capacity of the rolling line. At the same time, the austenite grains will coarsen during the long-time heating...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the intermediate billet is air-cooled and waits for temperature to reduce the rolling efficiency, and at the same time, through the efficient and flexible control of the intermediate billet temperature, it can meet the diverse process requirements such as differential temperature rolling, rolling and water cooling coupled controlled rolling, etc. , a hot continuous rolling intermediate billet cooling device and its use method are proposed, and the rapid cooling of the intermediate billet can be realized by using the ultra-rapid cooling technology

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