Rapid cooling method and device after medium and thick plate heat treatment furnace

Abstract

The invention provides a rapid cooling method after a medium and thick plate heat treatment furnace. The method comprises the following steps of: in the conveying process of steel plates treated by using a heat treatment furnace, preliminarily reducing the temperature of the steel plates in a gas blowing mode, and further reducing the temperature of the steel plates in a contact cooling mode. A rapid cooling device after the medium and thick plate heat treatment furnace comprises an air cooling mechanism and a roller cooling mechanism which are sequentially arranged behind the heat treatment furnace, wherein the air cooling mechanism comprises a roller way for conveying the steel plates, and a cooling spray pipe for spraying cooling gas to the steel plates in the conveying process; and the roller cooling mechanism comprises a plurality of water-cooled conveying rollers which are used for exchanging heat with the steel plates in the conveying process. Compared with cooling bed equipment and other cooling modes, the rapid cooling device and the rapid cooling method have the advantages that: auxiliary equipment and processes such as loading and unloading are not required, and the steel plates are cooled in the conveying process, so that the equipment cost is reduced, and the cooling efficiency is also improved.

Description

technical field

[0001] The invention belongs to the field of plate heat treatment, and specifically refers to a post-furnace rapid cooling method and a rapid cooling device for a medium-thick plate heat treatment furnace. Background technique

[0002] Compared with hot-rolled wide and thick plates, hot-rolled steel coil cross-cut plates have the characteristics of thinner thickness (up to 4mm), lower weight per unit area, and faster production pace. The hot-rolled coil cross-cutting plate heat treatment line aims to provide the above-mentioned high-performance, thin-gauge, high-value-added medium-thick plate, so the equipment on the heat treatment line needs to meet the needs of fast-paced production. The cooling after the existing heat treatment furnace is generally completed by the cooling bed equipment. The cooling bed equipment is divided into walking beam cooling bed, disc wheel cooling bed, chain grid cooling bed, rolling claw cooling bed and chain loading cooling bed,...

Examples

Embodiment Construction

[0026] Specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0027] The fast cooling method after the heat treatment furnace for medium and heavy plates in this embodiment is to firstly use the gas injection method to initially cool the steel plate to about 200~450°C during the transportation process of the steel plate after being treated in the heat treatment furnace, and then use contact cooling It is a method to further lower the temperature of the steel plate to about 80~200°C. By adopting the cooling method, not only the cooling time of the steel plate 1 can be greatly shortened, and the production efficiency can be improved, but also a reasonable cooling rate has no adverse effect on the structure and shape of the steel plate 1 .

[0028] Here is an engineering example to illustrate the above rapid cooling method in detail: the steel plate 1 in this example is a medium-thick plate with a t...

technical field

[0001] The invention belongs to the field of plate heat treatment, and specifically refers to a post-furnace rapid cooling method and a rapid cooling device for a medium-thick plate heat treatment furnace. Background technique

[0002] Compared with hot-rolled wide and thick plates, hot-rolled steel coil cross-cut plates have the characteristics of thinner thickness (up to 4mm), lower weight per unit area, and faster production pace. The hot-rolled coil cross-cutting plate heat treatment line aims to provide the above-mentioned high-performance, thin-gauge, high-value-added medium-thick plate, so the equipment on the heat treatment line needs to meet the needs of fast-paced production. The cooling after the existing heat treatment furnace is generally completed by the cooling bed equipment. The cooling bed equipment is divided into walking beam cooling bed, disc wheel cooling bed, chain grid cooling bed, rolling claw cooling bed and chain loading cooling bed,...

Examples

Embodiment Construction

[0026] Specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0027] The fast cooling method after the heat treatment furnace for medium and heavy plates in this embodiment is to firstly use the gas injection method to initially cool the steel plate to about 200~450°C during the transportation process of the steel plate after being treated in the heat treatment furnace, and then use contact cooling It is a method to further lower the temperature of the steel plate to about 80~200°C. By adopting the cooling method, not only the cooling time of the steel plate 1 can be greatly shortened, and the production efficiency can be improved, but also a reasonable cooling rate has no adverse effect on the structure and shape of the steel plate 1 .

[0028] Here is an engineering example to illustrate the above rapid cooling method in detail: the steel plate 1 in this example is a medium-thick plate with a t...

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