CN216919367U

CN216919367U - Ultrasonic circular crystallizer

Info

Publication number: CN216919367U
Application number: CN202220549169.2U
Authority: CN
Inventors: 王渊
Original assignee: Chengdu Microcrystal Special Metal Material Co ltd
Current assignee: Chengdu Microcrystal Special Metal Material Co ltd
Priority date: 2022-03-14
Filing date: 2022-03-14
Publication date: 2022-07-08
Anticipated expiration: 2032-03-14

Abstract

The utility model provides an ultrasonic circular crystallizer, which comprises a crystallizer copper plate, a crystallizer shell, an ultrasonic transducer array plate, an ultrasonic coupling seam, an ultrasonic transducer array plate mounting and fixing seat and an ultrasonic transducer array plate control cable, wherein the crystallizer copper plate is fixedly connected with the crystallizer shell; the crystallizer copper plate is installed in the crystallizer shell, the ultrasonic transducer array plate installation fixing seats are symmetrically and uniformly distributed in the cylindrical crystallizer shell in the center, one ends of the ultrasonic transducer array plate installation fixing seats are fixed on the inner wall surface of the crystallizer shell, and the other ends of the ultrasonic transducer array plate installation fixing seats are fixedly provided with the ultrasonic transducer array plates. In the electroslag remelting process, the ultrasonic energy converter array plate can perform manual intervention according to the change condition of the metal liquid level in the circular crystallizer, so that the ultrasonic energy converter array plate can emit ultrasonic waves with specific frequency, interference is applied to the metal liquid in the crystallizer, and the liquid metal can synchronously vibrate along with the ultrasonic energy converter block to emit ultrasonic waves, thereby improving and improving the electroslag remelting quality.

Description

Ultrasonic circular crystallizer

Technical Field

The utility model relates to the technical field of electroslag remelting in the metallurgical machinery industry, in particular to an ultrasonic circular crystallizer.

Background

The core component used in the electroslag remelting process in the metallurgical industry is a crystallizer, and the design innovation of a crystallizer assembly directly influences the electroslag remelting effect.

The traditional electroslag remelting crystallizer focuses on the process design of a slag system, current, voltage and cooling water, and tries to obtain a high-quality electroslag steel ingot on the basis. However, due to process limitations, the quality of the central part of the electroslag steel ingot with a larger size is difficult to guarantee, the center of the large electroslag steel ingot is loose, the crystal grains are coarse, the crystal grains are segregated, and even the shrinkage cavity is a common phenomenon, and for the quality problems, the quality problems brought in the early stage are generally improved by increasing the investment of subsequent forging and heat treatment processes.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provide an ultrasonic circular crystallizer, which can perform manual intervention according to the change condition of the metal liquid level in the circular crystallizer, so that an ultrasonic transducer array plate can emit ultrasonic waves with specific frequency, interference is applied to the metal liquid in the crystallizer, and the liquid metal can synchronously vibrate along with the ultrasonic transducer block to emit ultrasonic waves, thereby improving and improving the quality of electroslag remelting.

The utility model adopts the following technical scheme:

an ultrasonic circular crystallizer comprises a crystallizer copper plate, a crystallizer shell, an ultrasonic transducer array plate, an ultrasonic coupling seam, an ultrasonic transducer array plate mounting and fixing seat and an ultrasonic transducer array plate control cable.

Install the crystallizer copper in the crystallizer shell, be the central symmetry equipartition in the tube-shape crystallizer shell and have 4 ultrasonic transducer array board installation fixing bases, the internal face at the crystallizer shell is fixed to the one end of ultrasonic transducer array board installation fixing base, the other end fixed mounting ultrasonic transducer array board of ultrasonic transducer array board installation fixing base, all ultrasonic transducer array boards all are connected with the controller through ultrasonic transducer array board control cable.

An ultrasonic coupling seam is arranged between the ultrasonic transducer array plate and the crystallizer copper plate.

The utility model has the beneficial effects that:

1. the ingot weight of the ultrasonic circular crystallizer is 3-10 tons, a plurality of ultrasonic transducer array plates are arranged in the circular crystallizer, the ultrasonic transducer array plates can generate ultrasonic waves with different combinations and specific frequencies and specific energy by sending specific control signals through a matched controller, the energy of the ultrasonic waves is transmitted to a crystallizer copper plate through an ultrasonic coupling seam between the ultrasonic transducer array plate and the crystallizer copper plate in the circular crystallizer, and is transmitted to a metal molten pool through the crystallizer copper plate, so that the aim of vibrating the metal molten pool is fulfilled.

2. In the electroslag remelting process, the temperature of a metal molten pool is gradually increased towards the center of the molten pool along with a crystallizer copper plate, the cooling condition of the center of the crystallizer is worst, part of cooling capacity required by molten steel solidification at the center is gradually transmitted to the center of the metal molten pool of the crystallizer from cooling water through the crystallizer copper plate and the outer side of the metal molten pool, and the closer to the center of the molten pool, the smaller the temperature gradient is. The cold obtained from the molten steel is very limited. The heat exchange condition of the center of a metal melting pool of a large crystallizer (more than 5 tons) is very poor, the growth speed of a crystal blank is very low, the solidification speed is slow, and the metallurgical quality problems of large crystal grains, loose center, even serious shrinkage cavity, segregation and the like of a large electroslag ingot are caused.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a top view of fig. 1.

In the figure: 1-crystallizer copper plate, 2-crystallizer shell, 3-ultrasonic transducer array plate, 4-ultrasonic coupling seam, 5-ultrasonic transducer array plate mounting and fixing seat, 6-ultrasonic transducer array plate control cable, 7-electrode bar, 8-slag bath, 9-metal molten bath, 10-slag shell, 11-solidified electroslag ingot and 12-ultrasonic wave action area range.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention are described below clearly and completely, and it is obvious that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-2, the ultrasonic circular mold of the present invention includes a mold copper plate 1, a mold outer shell 2, an ultrasonic transducer array plate 3, an ultrasonic coupling slit 4, an ultrasonic transducer array plate mounting fixing seat 5, and an ultrasonic transducer array plate control cable 6.

Install crystallizer copper 1 in the crystallizer shell 2, be the central symmetry equipartition in the tube-shape crystallizer shell 2 and have 4 ultrasonic transducer array board installation fixing base 5, the internal face at crystallizer shell 2 is fixed to the one end of ultrasonic transducer array board installation fixing base 5, the other end fixed mounting ultrasonic transducer array board 3 of ultrasonic transducer array board installation fixing base 5, all ultrasonic transducer array boards 3 all are connected with the controller through ultrasonic transducer array board control cable 6.

An ultrasonic coupling seam 4 is arranged between the ultrasonic transducer array plate 3 and the crystallizer copper plate 1.

The electrode rod 7 is arranged at the upper part of the ultrasonic circular crystallizer, the middle part of the ultrasonic circular crystallizer is a slag bath 8, the lower part of the slag bath 8 is a metal molten pool 9, the part of the metal molten pool 9 close to the copper plate 1 of the crystallizer is a slag shell 10, the bottom of the metal molten pool 9 is a solidified electroslag ingot 11, and the end region of the electrode rod 7 and the top region of the metal molten pool 9 are adjustable ultrasonic action region ranges 12.

Because the ultrasonic transducer array plate 3 has various forms of array combination arrangement, a part of ultrasonic transducer blocks can be started or stopped according to requirements, thereby achieving the purpose of accurate control.

The ultrasonic transducer array plate 3 can emit ultrasonic waves with specific frequency and specific strength according to requirements, the ultrasonic waves are transmitted to the metal molten pool 9 through the ultrasonic coupling seam 4 and the circular crystallizer copper plate 1, and the metal liquid generates vibration, so that a crystal blank near a solid-liquid interface in the metal molten pool 9 is rapidly increased, the nucleation rate is greatly improved, the effects of refining grains and reducing segregation are achieved, and the quality of electroslag remelting can be greatly improved.

The ingot weight of the produced ultrasonic slab ingot crystallizer is 3 tons to 10 tons.

Working process of the utility model

After the device is installed, the ultrasonic transducer array plate 3 is controlled by the controller to emit ultrasonic waves with different energies, and the nucleation rate of the liquid phase side of the solid-liquid interface of the metal molten pool 9 is greatly improved under the action of the ultrasonic energy. The growth speed of the crystal blank near the solid-liquid interface at the central part of the original electroslag crystallizer is slow, under the action of ultrasonic waves, one crystal blank can be broken into a plurality of finer crystal blanks, the newly formed crystal blank grows again and is broken repeatedly, the nucleation rate at the central part in the metal molten pool 9 is greatly increased, and the obtained metallurgical effect is very obvious: the phenomena of coarse grains, shrinkage cavity, center porosity and the like are avoided, and the composition segregation is effectively controlled.

Under the action of ultrasonic energy, a slag bath which is used as the core of electroslag remelting also vibrates synchronously along with ultrasonic waves, and during the electroslag remelting, metal droplets which are melted and dripped from an electrode can have a phenomenon of dripping in advance, namely the metal droplets are dripped by overcoming the surface tension of dripping by gravity unlike the traditional electroslag remelting, but the droplets which are not accumulated to be heavy enough are knocked down from the electrode under the action of the ultrasonic waves and enter a metal molten pool for reaction. The smaller liquid drops have larger reaction interface when reacting in the molten pool, so that the capability of removing the inclusions in the metal molten pool 9 is obviously improved, and the function of electroslag remelting is greatly improved.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. An ultrasonic circular crystallizer is characterized by comprising a crystallizer copper plate, a crystallizer shell, an ultrasonic transducer array plate, an ultrasonic coupling seam, an ultrasonic transducer array plate mounting and fixing seat and an ultrasonic transducer array plate control cable;

2. The ultrasonic circular crystallizer of claim 1, wherein an ultrasonic coupling slit is arranged between the ultrasonic transducer array plate and the crystallizer copper plate.