Narrow-face copper plate for asymmetric slab continuous casting chamfering crystallizer
A technology of chamfering crystallizers and narrow-faced copper plates, which is applied in the field of steelmaking-continuous casting, can solve problems such as internal and external arcs without consideration, and achieve the effects of increasing temperature, reducing incidence, and ensuring safety
Active Publication Date: 2014-10-15
SHOUGANG CORPORATION
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[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 tr
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[0030]When casting a slab of 280×2000mm, the narrow-sided copper plate adopts the design of large inner arc chamfer and small outer arc chamfer. The size of L1 is 40mm, and the size of H1 is 40mm. The upper edge of the large inner arc chamfer and inner arc copper plate The angle α1 between the upper edges 8 is 45°. The size of L2 is 10mm, the size of H2 is 10mm, and the angle α2 between the upper edge 5 of the small-sized outer arc chamfer and the edge 9 of the outer arc copper plate is 45°.
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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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IPC IPC(8): B22D11/059
Inventor 甄新刚赵新宇刘洋谢翠红朱志远王玉龙李永明周金明赵晶王臻明关春阳吕延春王海宝孙博樊星辰
Owner SHOUGANG CORPORATION
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