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

Abstract

A semi-continuous casting device and method for three-layer coated ingots. The device includes an inner crystallizer, an intermediate crystallizer, an outer crystallizer, an inner diverter plate, an intermediate diverter plate, an outer diverter plate, a support plate and an ingot block. The inner surfaces of each crystallizer are equipped with graphite rings, and the outer and lower surfaces of the inner crystallizer and the intermediate crystallizer are equipped with heat-insulating sheaths. The inner crystallizer is hoisted and fixed, and the upper surface of the starter block has three steps. The steps of the method are: control the rise of the starter block so that the three layers of steps enter the corresponding graphite rings; pour each layer of melt into the three crystallizers respectively, and under the joint cooling effect of the crystallizer and the steps of the starter block, each layer The first layer of melt begins to solidify and forms a solidified shell; when the solidified shell of each layer of melt reaches the set thickness, the dummy block is controlled to move downward, and the melt of the coating layer begins to contact and wet the inner solidified shell. Diffusion realizes metallurgical bonding; when the ingot reaches the predetermined size, the melt pouring is stopped sequentially from the inside to the outside, the ingot block stops moving downward, and the casting is completed.

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

Images