Even-cooling crystallizer copper tube and manufacturing method thereof

Abstract

An even-cooling crystallizer copper tube for continuous casting is characterized in that an outer-layer corner tube walls (2) are arranged outside corresponding corner tube walls (1) of the crystallizer copper tube, an interlayer is formed between each outer-layer corner tube wall (2) and the corresponding corner tube wall (1) so as to reduce cooling intensity of corners of the copper tube, and the corners and edges of the copper tube can be evenly cooled. The even-cooling crystallizer copper tube is concise in structure, the problem that the corners of the copper tube are unevenly cooled is directly solved, corner cracking tendency of the casting blank is lowered, ingot pulling speed of a continuous casting machine is increased, tolerance lever of continuous casting technology is relaxed, and equipment investment of the continuous casting machine is reduced. A tubular blank tube is directly manufactured by a liquid die forging method, the wall thickness of the corners of the blank tube is larger than that of the edges, conditions are created for construction of a corner structure of the even-cooling crystallizer copper tube, and manufacturing cost of the crystallizer copper tube is lowered by the liquid die forging technology.

Description

technical field [0001] The invention belongs to the field of metal solidification and continuous casting, and in particular relates to a uniformly cooled crystallizer copper tube. Background technique [0002] In the metal continuous casting production of square, rectangular and plate-shaped slabs with polygonal cross-sections, after the liquid metal is poured into the copper tube of the crystallizer, it crystallizes and solidifies along the inner wall of the mold under the action of cooling water outside the copper tube to form a slab shell and Solidification and shrinkage occur, and the metal in the corner area of ​​the mold copper tube is cooled by the two tube walls, which is stronger than the edge cooling, resulting in uneven metal temperature, billet shell thickness and shrinkage at the corner and edge, increasing the corner crack of the billet Tendency to limit the ingot pulling speed of the continuous casting machine. [0003] To solve the above problems, there are ...

AI Technical Summary

Problems solved by technology

In practical application, billet corner cracks are avoided, and the continuous casting speed is significantly increased, but the investment in equipment is high, and the adaptability of steel types is poor

Another type of solution is to paste or inlay thermal resistance materials at the corners of the copper tubes to directly reduce the cooling strength of the corners of the copper tubes of the mold, but the reliability is low, and no popularization and application has been seen.

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