Semi-continuous casting device and method for a three-layer clad ingot

Abstract

The invention discloses a semi-continuous casting device and method of a three-layer coated cast ingot. The device comprises an inner crystallizer, a middle crystallizer, an outer crystallizer, an inner flow division disk, a middle flow division disk, an outer flow division disk, a supporting plate and an ingot guide block, wherein graphite rings are arranged on the inner surfaces of the three crystallizers; heat isolation protective sleeves are arranged on the outer lower surfaces of the inner crystallizer and the middle crystallizer; the inner crystallizer is hung and fixed; and three layers of steps are arranged on the upper surface of the ingot guide block. The method comprises the following steps: controlling the ingot guide block to rise up to enable the three layers of steps to enter the corresponding graphite rings; respectively pouring each layer of melt into the three crystallizers, wherein under the common cooling action of the crystallizers and the steps on the ingot guide block, all the layers of melts start to be condensed to form a condensed shell; when the condensed shell of all the layers of melts reaches a set thickness, controlling the ingot guide block to move downwards to enable the melts in the coating layers to start to be in contact with the condensed shell on the inner layer and wetted, and realizing metallurgical bonding through element diffusion; and when the ingot reaches a preset size, stopping melt pouring in sequence from inside to outside to enable the ingot guide block to stop moving downwards, and ending casting.

Description

technical field [0001] The invention belongs to the technical field of layered composite material preparation, and in particular relates to a semi-continuous casting device and method for a three-layer coated ingot. Background technique [0002] With the continuous development of science and technology, in the fields of metallurgical construction, petrochemical industry, aerospace, transportation, electronic information and national defense and military industry, the requirements for material performance are getting higher and higher. In most cases, the performance of a single material has been difficult to meet In order to meet the needs of actual use, the composite material formed by combining materials with different properties can improve the overall performance of the material, so as to meet the needs of actual use. [0003] The layered composite material is made by coating one or more layers of alloy on the core material, which has the advantages of each layer of alloy...

AI Technical Summary

Problems solved by technology

But the actual situation is not the case, since the inner metal liquid is directly cooled only by the bottom of the inner crystallizer annular water cavity and the outer solidification shell is indirectly cooled, its cooling capacity is far from enough, and at the same time, due to the application of pulse electromagnetic field, the molten The body oscillates, which will lead to instability at the interface, prone to interface damage, and the direct result is composite failure

[0012] The Chinese patent application with the publication number CN101549392A specifically relates to an electromagnetic continuous casting method and its device for a double-layer cast slab. If it is exposed to the air, it will inevitably involve air, inclusions, etc. into the cladding layer alloy; in addition, the equipment is too complicated, which requires high requirements for equipment manufacturing, personnel operation skills, process level and automatic control, especially correct It is difficult to control and reasonably match the process parameters so that the interface between the two metals is well bonded and the interface is stable, and the degree of freedom of metal combination is also limited to a large extent. It is difficult to achieve continuous and mass production, and it is not applicable Preparation of multi-layer clad ingots with more than two layers

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