Sector segment structure capable of compositely pressing continuous casting solidification tail end of extra-thick plate

Abstract

The invention provides a sector segment structure capable of compositely pressing the continuous casting solidification tail end of an extra-thick plate. An inner arc roller, an outer arc roller, an upper frame, a lower frame and side frames have enough strength and rigidity, four sensors and four oil cylinder assemblies are installed in the parts, the stretching or retraction strokes of the first oil cylinder assembly, the second oil cylinder assembly, the third oil cylinder assembly and the fourth oil cylinder assembly are controlled by detecting the first displacement sensor, the second displacement sensor, the third displacement sensor and the fourth displacement sensor, and then the opening degree between the inner arc roller and the outer arc roller of a sector segment is controlled, and the continuous casting solidification tail end of the extra-thick plate can be compositely pressed.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a segment structure capable of realizing composite pressing at the end of continuous casting and solidification of extra-thick plates. Background technique [0002] Central segregation and porosity are one of the main defects of continuous casting slabs. Central segregation and porosity defects will cause a series of quality problems in steel, such as steel ductility, welding performance, and hydrogen-induced crack resistance. For conventional continuous casting, dynamic soft reduction technology has been adopted at home and abroad in recent years, which greatly reduces or eliminates the central segregation and porosity of the billet. However, for continuous casting of extra-thick slabs, due to the low casting speed of the continuous casting machine, the thick slab shell at the end of the slab solidification, and the high deformation resistance of the slab, when co...

AI Technical Summary

Problems solved by technology

However, for continuous casting of extra-thick slabs, due to the low casting speed of the continuous casting machine, the thick slab shell at the end of the slab solidification, and the high deformation resistance of the slab, when conventional light reduction is adopted, the segregation of the slab center and the loose defects can be improved. It is not obvious. For this reason, the composite reduction technology at the end of solidification was developed, which significantly reduced the segregation and porosity of the billet center, and significantly improved the pass rate of plate flaw detection.

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