Narrow-face copper plate for asymmetric slab continuous casting chamfering crystallizer

Abstract

The invention provides a narrow-face copper plate for an asymmetric slab continuous casting chamfering crystallizer and belongs to the technical field of steelmaking-continuous casting. A working face of the narrow-face copper plate consists of a middle working face (2), a large-size inner-arc chamfer (3) and a small-size outer-arc chamfer (4). An upper opening of the narrow-face copper plate is defined by a small-size outer-arc chamfering upper edge (5), a middle working face upper edge (6), a large-size inner-arc chamfering upper edge (7), an inner-arc copper plate upper edge (8), an outer-arc copper plate upper edge (9) and a copper plate back side upper edge (10). Two-dimensional heat transfer of corner portions is changed by changing corner portions of a medium-thickness slab, the slab corner portion temperature is improved, meanwhile differential treatment is performed by considering inner-outer-arc difference, accordingly the problem that corner transverse crack defects easily occurred in the continuous casting slab can be solved. In addition, the temperature difference between the outer arc and the inner arc is also considered, and the safety of the slab on a heating furnace roller way is ensured while the outer-arc corner transverse crack defects are overcome.

Description

technical field [0001] The invention belongs to the technical field of steelmaking-continuous casting, and in particular provides a narrow-faced copper plate for an asymmetric slab continuous casting chamfering crystallizer. The applicable continuous casting slab thickness specification range is 150-400mm, and the width specification range is 1400-2400mm. Background technique [0002] According to previous research results, there is a brittle zone in steel between 600-900°C, and the high-temperature thermoplasticity of the slab surface drops rapidly, which is called the third brittle zone. The corners of the slabs of medium and heavy plates belong to two-dimensional heat transfer, so the temperature of the corners drops quickly. Even if the secondary cooling mode of weak cooling is used, the temperature of the corners of the slabs at the straightening position cannot be guaranteed to be above 900 °C. During the straightening process, the corners of the slab are generally at...

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Problems solved by technology

[0015] The design of the chamfering crystallizer above does not consider the difference between the inner and outer arcs. Due to the different cooling characteristics of the inner and outer arcs, the design of the inner and outer arcs should be treated differently. At the same time, the forward movement and safety issues of the slab must be considered on the roller table before entering the heating furnace. , special consideration should also be given to the chamfer design of the outer arc

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