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Improved method of vibration exciting metal liquid shape crystal nucleus and its device

A liquid metal and metal technology, applied in the field of metal casting, can solve the problems of inability to act on unsolidified molten metal, short ultrasonic action distance, complex equipment structure, etc. The effect of internal quality

Inactive Publication Date: 2007-08-22
CENT IRON & STEEL RES INST
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Problems solved by technology

There are three main disadvantages of this method: one is that the distance of action of ultrasonic waves is short as described in the article; Melting point metal, how to maintain the service life of the ultrasonic emission source
But, the crystal nucleus launcher in this invention needs to connect the pipeline etc. of the cooling medium that circulates in the back, and equipment structure is complicated; rising, the cooling capacity decreases, and the molten metal will soon form an overly thick solidified shell on the nuclei emitter

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  • Improved method of vibration exciting metal liquid shape crystal nucleus and its device

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Embodiment Construction

[0030] The specific implementation manner of the invention will be further introduced in detail below in conjunction with the accompanying drawings.

[0031] The device of this invention is made up of four parts (see Fig. 1): cold material uncoiling device, cold material straightening device, high-frequency small-amplitude vibration generating device, and vibration transmission and action device. Among them: through the action of the uncoiling device 1, the cold material 2 whose composition is within the required range is uncoiled and straightened in the straightening device 3, and the vibration source 5 and the vibration device 4 are used for high-frequency and small-amplitude vibration, and then continuously fed into the crystallizer 6. When the cold material is fed into the crystallizer 6 in the form of vibration (see Figure 2), the front end of the cold material is in contact with the molten metal 9 in the crystallizer. While the cold material itself is continuously melted...

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Abstract

An improved method for vibration excitation of the nucleuses in molten metal includes such steps as immersing at least one crystal nucleus ejector with high-frequency low-amplitude in molten metal, quickly generating a lot of crystal nucleuses in the front of said ejector, and ejecting them in the molten metal to form a lot of crystal nucleuses of equiaxed crystals. It features that said crystal nucleus ejector is a consumable cold metal material.

Description

technical field [0001] The invention belongs to the field of metal casting, and in particular relates to a method and a device for increasing the equiaxed crystal ratio of continuous casting slabs by exciting nucleation through vibration. Background technique [0002] In the existing metal continuous casting production technology, the central mass of the continuous casting slab is reduced due to the selective crystallization during the solidification process, especially the central segregation and central shrinkage cavity produced by high alloy steel, high carbon steel castings and continuous casting slabs , center looseness and other issues have become the core issues affecting the quality of the rear rolled products. In order to solve the above problems, many patents and technologies have been developed in this technology for a long time. These patents and technologies mainly focus on two cores: one is to reduce superheat, such as tundish plasma molten steel heating, tundi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/114
Inventor 张慧赵沛仇圣桃颜慧臣王玫陶红标王明林岳尔斌
Owner CENT IRON & STEEL RES INST
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