Fan-shaped segment structure and method for realizing continuous casting, solidification and tail end composite pressing of super-thick plate

Abstract

The invention discloses a fan-shaped segment structure and a method for realizing continuous casting, solidification and tail end composite pressing of a super-thick plate. An inner arc roller, an outer arc roller, an upper framework, a lower framework, a side framework I and a side framework II have sufficient strength and rigidity; four sensors and four oil cylinder assemblies are arranged in the components; the extension or retraction strokes of a first oil cylinder assembly, a second oil cylinder assembly, a third oil cylinder assembly and a fourth oil cylinder assembly are controlled by detecting a first displacement sensor, a second displacement sensor, a third displacement sensor and a fourth displacement sensor, so that the opening degree between the inner arc roller and the outer arc roller of a fan-shaped segment is controlled. The conventional pressing amount and a large compressing amount are implemented according to the solid fractions of different casting blanks, so that continuous casting, solidification and tail end composite pressing of the super-thick plate are realized.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a segment structure and a method capable of realizing compound 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 s...

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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