Chamfered crystallizer narrow-surface copper plate

Abstract

The invention discloses a chamfered crystallizer narrow-surface copper plate which comprises a main surface area and side surface chamfered areas, wherein one or more cooling water tanks which run through in an up-down manner are arranged on the main surface area, and a cooling mechanism is arranged at the back part of each side surface chamfered area. The cooling mechanisms are triangular structure holes consisting of a plurality of cooling holes, and the cooling holes adopt round structures. Under the action of the chamfers, steel billets can be better clung to the inner wall of a crystallizer in the molten steel solidification process, so that the casting blank quality can be ensured.

Description

technical field [0001] The invention relates to the technical field of metal solidification and continuous casting, in particular to a chamfering crystallizer narrow surface copper plate. Background technique [0002] With the development of metallurgical technology in the world, modern continuous casting technology continues to improve, and the types of castable steel continue to expand. Some high-alloy, high-quality, and high-crack-sensitive steel types have been continuously produced in the continuous casting production process of large iron and steel enterprises. One of the main technological advances is the development of large-section slab continuous casting technology. With the development of continuous casting technology of large section billet, the compression ratio of steel is increased, and the product quality of steel is improved. However, the adverse effect brought by the increase of the section of the billet is that the billet needs to be bent and straightened...

AI Technical Summary

Problems solved by technology

However, the adverse effect brought by the increase of the section of the slab is that the slab needs to be bent and straightened in the casting machine, which will increase the cracks at the corners of the slab

Especially in recent years, the thickness of the slab of the large slab continuous casting machine has reached more than 250-450mm, and the thickness of the bloom and the large rectangular slab has reached more than 350-500mm, such as the chamfering mold copper plate disclosed in CN201410469991. CN201110281520.0 discloses a tapered chamfering mold copper plate, due to the uneven cooling of the corners, the stress concentration in the bending and straightening process will inevitably lead to the increase of cracks in the corners of the slab

In order to avoid crack defects at the edge of the subsequent rolled steel plate, it is often necessary to perform corner cutting on the continuous casting slabs with corner transverse cracks and corner longitudinal crack defects, but this not only greatly increases the production cost, but also Reduced production efficiency, seriously affected the logistics of iron and steel enterprises and the delivery time of contract orders

On the other hand, it is necessary to consider the issues of safety, processing difficulty and cost. It is very difficult to install a through cooling water tank in the chamfering area. On the other hand, the design and manufacture of the cooling water tank directly affect the generation of transverse cracks in the corner. And longitudinal cracks, small chamfering area can be imagined to be difficult to process, so the processing of irregular or irregular cooling water grooves (especially arc or irregular cooling holes) is even more daunting for processors. On the other hand, processing cost and safety Both are important reasons that hinder the crystallizer from upgrading to a more reasonable structure

It hinders the rapid development of crystallizers, and even hinders the formation of divergent thinking of technicians in the technical field

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