Hyperbolic funnel-shaped crystallizer wide copper plate and preparation method thereof
A crystallizer and funnel-shaped technology, applied in geometric CAD, computer-aided design, design optimization/simulation, etc., can solve problems such as high stress level, cracks in slab, and low quality of slab, and achieve low stress level and improved Continuous and stable effect of billet quality and curvature changes
Active Publication Date: 2020-10-02
CONTINUOUS CASTING TECH ENG OF CHINA
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Problems solved by technology
[0006] Based on the above problems, the object of the present invention is to provide a hyperbolic funnel-shaped mold wide-faced copper plate to solve the problems in the prior art that the shell shell stress level in the mold is relatively large, cracks often appear in the slab, and the quality of the slab is not high.
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[0061] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention:
[0062] Crystallizer funnel shape design principles:
[0063] The funnel shape design of the funnel crystallizer must meet the following three principles.
[0064] (1) Meet the requirements for placing submerged nozzles. Ensure that when the insertion depth of the submerged nozzle is about 200mm, the distance between the mold wall and the submerged nozzle is greater than 20mm.
[0065] (2) Ensure that the shrinkage rate of the perimeter of the transverse contour curve of the crystallizer cavity in the casting direction is equal to or less than the solidification shrinkage rate of the billet shell.
[0066] (3) The curvature of the curve in the horizontal and vertical directions of the funnel area is continuous, and the rate of curvature change is small, so as t...
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Abstract
The invention discloses a wide-faced copper plate of a hyperbolic funnel-shaped crystallizer and a preparation method thereof. The middle part of the wide-faced copper plate of the crystallizer is concave and forms a funnel-shaped curved surface, and the curved surface is topologically formed by a family of transverse curves and a family of longitudinal curves, wherein the longitudinal curves of the wide-faced copper plate are hyperbolic distributed along the height direction of the crystallizer. The hyperbolic longitudinal taper curve of the present invention makes the air gap between the copper plate of the crystallizer and the solidified slab shell smaller, which can effectively take away heat; through the calculation of the thermal-mechanical coupling model, the stress level of the slab shell in the crystallizer is relatively low, effectively reducing the cracks of the slab The opportunity is formed and the quality of the billet is improved.
Description
technical field [0001] The invention relates to the technical field of thin slab continuous casting, in particular to a wide-faced copper plate of a hyperbolic funnel-shaped crystallizer and a preparation method thereof. Background technique [0002] Thin slab continuous casting is a revolutionary cutting-edge technology in today's world steel industry. The funnel-shaped mold is the core of the thin slab continuous casting technology. It is characterized by a funnel shape with a vertical taper between the wide-faced copper plates to meet the requirements for the insertion of the submerged nozzle, the melting of mold powder and the thickness of the slab. [0003] The surface shape of the funnel area is closely related to the strain, strain rate and stress level in the plastic deformation zone in the high-temperature slab shell, which directly affects the surface quality of the slab. In the funnel-shaped crystallizer, when the primary shell moves in the funnel area along the ...
Claims
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IPC IPC(8): B22D11/057G06F30/17G06F30/23
CPCB22D11/057G06F30/17G06F30/23
Inventor 李富帅韩占光倪赛珍
Owner CONTINUOUS CASTING TECH ENG OF CHINA