A device and method for preparing large-scale high-quality aluminum alloy ingots

Abstract

The invention relates to a device and a method for preparing a large-scale high-quality aluminum alloy cast ingot, which belongs to the field of machining of metal materials. The device mainly consists of a uniform cooler, a hot top, an oil gas lubricating crystallizer, an induction coil and a dummy ingot; the hot top is arranged above the oil gas lubricating crystallizer, the induction coil is arranged at the outer side of the oil gas lubricating crystallizer, the uniform cooler is arranged in the oil gas lubricating crystallizer, and the dummy ingot is located below the oil gas lubricating crystallizer. A partition gas feeding crystallizer, the uniform cooler and an electromagnetic stirrer are smartly combined, and the effective coupling of the three realizes forced and uniform solidification and formation of a melt under a gas pressure contact state, such that a stable and continuous air film is formed between the melt and the crystallizer, not only is the surface of the cast ingot smooth, but also an internal tissue is tiny and uniform. By adopting the large-scale high-quality aluminum alloy cast ingot prepared by the invention, the production efficiency is high, easiness in combination with large industrial production is realized, and the device and method have broad industrial application prospect in the manufacturing fields of aerospace, rail traffic, ships and the like.

Description

technical field [0001] The invention belongs to the field of metal material processing, and in particular relates to a device and method for preparing large-scale high-quality aluminum alloy ingots. Background technique [0002] With the improvement of the performance of large-scale complete equipment in the manufacturing industry, it has become an inevitable trend to use more and more large-scale integral structures in aerospace, rail transportation, shipbuilding and other fields, such as large transport aircraft, high-performance fighters and Large-scale overall aluminum materials and high-performance thick plates are widely used in the development of high-speed trains, and the preparation of these materials is inseparable from large-scale and high-quality aluminum alloy ingots. Industrial equipment capability is of great significance. [0003] Semi-continuous casting is the most important method for producing aluminum alloy ingots. However, due to the limitations of the...

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Problems solved by technology

[0007] The existing air film casting method cannot prepare large-scale aluminum alloy ingots, and there are problems such as poor surface quality of ingots and rough and uneven internal structures. The invention proposes a new device and method for preparing large-scale high-quality aluminum alloy ingots. In the process of air-film casting, uniform cooling in the middle of the crystallizer and electromagnetic stirring coupling melt treatment outside the crystallizer are applied to prepare large-scale high-quality aluminum alloys. When casting alloy ingots, solve the surface quality and internal quality problems of the ingot at the same time

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