Ultrasonic casting and rolling mill for preparing magnesium alloy slabs

Abstract

The invention relates to a novel ultrasonic casting-rolling machine for manufacturing a magnesium alloy plate blank. The ultrasonic casting-rolling machine comprises a casting-rolling trolley, a melt conveying liquid level control system and rollers. The casting-rolling machine further comprises ultrasonic probes which are arranged on the inner walls of the annular rollers. The upper roller and the lower roller are each internally provided with one ultrasonic probe. The ultrasonic probes are arranged in the parts, close to the casting-rolling area casting blank solidification leading edge positions, of the interiors of the rollers. According to the novel ultrasonic casting-rolling machine for manufacturing the magnesium alloy plate blank, the power ultrasonic probes are applied to the inner walls of the annular rollers, ultrasonic outer fields directly act on the casting-rolling solidification leading edge positions, and thus the structure refinement and homogenization effects of power ultrasound on the casting-rolling plate blank can be significantly improved, so that the solute distribution uniformity and the casting blank metallurgy quality are improved; the interiors of the rollers are hollow, the weight of the rollers can be significantly reduced, and casting-rolling transmission energy consumption also can be reduced; and a water cooling mode is replaced with an air cooling mode, so that the risk that magnesium liquid explodes when encountering water due to the fact that roller sleeves are fractured is completely avoided, and the industrial production safety level is improved.

Description

technical field [0001] The invention belongs to the field of nonferrous metal processing, and in particular relates to new equipment for producing magnesium alloy slabs. Background technique [0002] The twin-roll cast-rolling technology has the characteristics of short process, low energy consumption and high efficiency. It is applied in the field of magnesium alloy slab manufacturing, which can significantly reduce the cost of plate processing and has a good application prospect. At present, magnesium alloy plates at home and abroad have been processed by the process of hot rolling with cast-rolled slabs. [0003] The mechanical properties of pure magnesium are low, and a large amount of alloying elements need to be added for solid solution strengthening to ensure that the finished sheet meets the performance requirements. Therefore, the raw material for magnesium alloy casting and rolling is an alloy with high solute content. Due to the high solute content and wide solid...

AI Technical Summary

Problems solved by technology

However, in most ultrasonic casting and rolling devices at present, the ultrasonic application position is mostly placed in the front box and the position where the nozzle melt flows, and there is still a distance from the solidification front of the alloy melt. When the ultrasonic wave reaches the solidification front, it has been greatly attenuated and it is difficult to fully utilize it Effect of Ultrasonic External Field on the Improvement of Solidification Structure of Magnesium Alloy Casting and Rolling Slabs

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