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Thin slab funnel-shaped crystallizer wide-faced copper plate based on relaxation curve and preparation method

A mold and thin slab technology is applied in the field of thin slab funnel-shaped mold wide-faced copper plate and its preparation, which can solve the problems of large shell stress, shell cracks, and uneven curve change rate, and achieves high-efficiency heat, reducing The effect of slab stress, reducing the probability of occurrence

Active Publication Date: 2021-01-15
CONTINUOUS CASTING TECH ENG OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a thin slab funnel-shaped crystallizer wide-faced copper plate based on the relaxation curve, to solve the problem that the rate of change of the curve in the funnel area of ​​the thin slab crystallizer in the prior art is not constant, the internal stress of the billet shell is relatively large, and the billet shell often Problems such as cracks

Method used

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  • Thin slab funnel-shaped crystallizer wide-faced copper plate based on relaxation curve and preparation method
  • Thin slab funnel-shaped crystallizer wide-faced copper plate based on relaxation curve and preparation method
  • Thin slab funnel-shaped crystallizer wide-faced copper plate based on relaxation curve and preparation method

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Embodiment

[0117] According to the taper curve obtained in the content of the invention, the following takes a thin slab funnel-shaped crystallizer copper plate as an example to illustrate the specific implementation of the invention. The main parameters of the continuous casting machine using the mold copper plate are as follows:

[0118] Case: 1200mm×90mm thin slab

[0119] For the production of 1200mm×90mm thin slabs, considering various factors, the maximum height in the middle of the funnel-shaped curve at the upper mouth of the crystallizer is 48.7141mm; half of the lateral distance of the arc in the funnel area is figure 1 Transverse distance z of medium transition arc OL = 440mm.

[0120] Namely w=1200, wp=h=48.7141, first calculate β and R, and then calculate according to β and R: b1=10.9161, then:

[0121] a=364.656628

[0122] b=1180848.61

[0123] c=-366807250

[0124] d=-3266.04266

[0125] Catchy:

[0126] β=0.570712494

[0127] R=267.5619317

[0128] So as to obt...

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Abstract

The invention discloses a wide face copper plate of a sheet billet hopper-shaped crystallizer and based on a transition curve and a manufacturing method. According to the wide face copper plate, the transition curve and a circular curve are adopted, combined and connected to form a transverse curve on the basis that a billet shell solidification contraction and deformation mechanism is taken intoaccount, and therefore the situation that the transverse curvature of a cast billet continuously changes is guaranteed, and the transverse stress of a billet shell is reduced; and a hyperbolic taper curve is adopted by a longitudinal curve, and the change of the curvature of the portion nearby the meniscus face is large so that the requirement for the taper of the portion nearby the meniscus facecan be preferably met. The wide face copper plate of the sheet billet hopper-shaped crystallizer and based on the transition curve has the advantages that the design of the transverse curve and the longitudinal curve conforms to the solidification contraction rule of the cast billet, and therefore the stress of the cast billet is conveniently reduced, the generation probability of cracks of the cast billet is reduced, and the requirement of the high casting speed for the copper plate of the sheet billet crystallizer is met.

Description

technical field [0001] The invention relates to a thin-slab funnel-shaped crystallizer for metallurgical continuous casting equipment, in particular to a novel wide-faced copper plate of the thin-slab funnel-shaped crystallizer based on relaxation curves and a preparation method. Background technique [0002] Thin slab continuous casting is a revolutionary cutting-edge technology in today's world steel industry. Funnel mold is the core of thin slab continuous casting technology. It is characterized in that a funnel shape with a taper in the vertical direction is adopted between the wide copper plates to meet the requirements for the insertion of the submerged nozzle, the melting of mold powder and the thickness of the slab. 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 crystall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/059B22D11/057
CPCB22D11/0408B22D11/057B22D11/059
Inventor 倪赛珍李富帅韩占光
Owner CONTINUOUS CASTING TECH ENG OF CHINA
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