Crystallizer narrow copper plate for solving continuous casting blank corner defects

Abstract

The invention relates to a crystallizer narrow copper plate for solving continuous casting blank corner defects. The crystallizer narrow copper plate is characterized by comprising a narrow copper plate body (1), the two sides of the middle lower portion of the narrow copper plate are outside chamfered, and k is a coefficient of steel solidification. The crystallizer narrow copper plate has the advantages of guaranteeing slow cooling of continuous casting blank corners, reducing and eliminating the casting blank corner defects, improving casting blank quality, reducing wear of the narrow copper plate, prolonging service life of the narrow copper plate and reducing maintenance of a crystallizer. thermal resistance between the casting blank and the copper plate corners is increased through chamfering, the slow cooling of casting blank corners is guaranteed, defects of the casting blank corners are optimized, and the copper plate corners on the lower portion of the crystallizer contact with the casting blank corners virtually to optimize wear of the copper plate.

Description

technical field [0001] The invention relates to a crystallizer narrow-faced copper plate for solving the corner defects of continuous casting slabs. Background technique [0002] For crack-sensitive steel types, by improving the heat transfer at the corner of the continuous casting slab, the defects such as cracks at the corner of the slab are solved, and the quality of the continuous casting slab is improved. The current crack-sensitive steel grades have gradually reduced defects on the wide and narrow sides of the slab by improving the continuous casting process and equipment technology. heat, the cooling rate is large and prone to uneven cooling, and for crack-sensitive steels, cracks, corner depressions and other defects are prone to occur). At the same time, the corners of the lower part of the narrow-faced copper plate will be worn after casting thousands of tons. If the copper plate with worn corners continues to use the corners of the continuous casting slab, it wil...

AI Technical Summary

Problems solved by technology

The defects of the wide and narrow faces of the slab are gradually reduced by improving the continuous casting process and equipment technology for current crack-sensitive steel types, but defects such as corner cracks often appear during the continuous casting process (because the corner of the slab belongs to the two-dimensional heat, the cooling rate is large and prone to uneven cooling, and for crack-sensitive steels, cracks, corner dents and other defects are prone to occur)

At the same time, the corners of the lower part of the narrow-faced copper plate will be worn after casting several thousand tons. If the copper plate with worn corners continues to use the corners of the continuous casting slab, it is easy to seep copper in the corners, which may cause star-shaped cracks on the surface of the slab and cause narrow-faced cracks in severe cases. Steel breakout accident

[0003] In order to solve the above problems, technologies such as inverting the inner right angle of the narrow copper plate, inverting the inner circle, and changing the structure of the cooling water seam of the narrow copper plate are currently used in the crystallizer, but the effect is not obvious

In addition, for the chamfering of the inner corner of the copper plate, the consumption of the base material is large, the cost is high, and the processing is particularly complicated. At the same time, this technology does not solve the problems of serious wear at the lower corner of the copper plate and low copper plate life.

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