Liquid guide device and method for stable flow control in semi-continuous casting process of magnesium alloy

Abstract

The invention discloses a Liquid guide device and method for stable flow control in the semi-continuous casting process of magnesium alloy, and belongs to the field of casting. The liquid guide device for stable flow control in the semi-continuous casting process of the magnesium alloy is provided with a liquid guide control actuator and a shielding gas control device; the liquid guide control actuator comprises a lifting device and a flow-dividing control device, the lifting device is connected to the flow-dividing control device, the lifting device is used for adjusting the flow-dividing control device to ascend and descend, and the flow-dividing control device is used for controlling the flow of magnesium alloy melt at the liquid outlet end of the liquid guide pipe; a crucible containing the magnesium alloy is connected to a shielding gas storage tank through a shielding gas conveying pipe, and a shielding gas control device is arranged on the shielding gas conveying pipe and used for controlling the pressure in the crucible by adjusting the shielding gas output process. According to the device, high-temperature melt can be stably conveyed in the semi-continuous casting process, the stability of the liquid level in a crystallizer is guaranteed, the surface quality and smoothness of products are improved, the possibility of slag inclusion is reduced, stable and safe casting production is achieved, and the applicability is wide.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a liquid guiding device and method for stabilizing and controlling flow in a magnesium alloy semi-continuous casting process. Background technique [0002] For the traditional ingot casting method, steel mold casting is adopted. However, the ingot produced by this method has relatively coarse grains, poor structure uniformity, and defects such as slag inclusion are prone to occur. The crystal grains of the magnesium alloy billet produced by the semi-continuous casting process are obviously refined, and the uniformity and density of the alloy structure are improved, thereby improving the mechanical properties and productivity of the product. [0003] Due to the excellent properties of magnesium alloys, it is particularly important to be able to produce magnesium alloy ingots with good casting properties. In recent years, discussions on how to improve the casting perfo...

AI Technical Summary

Problems solved by technology

[0006] At the present stage, the mold, the key device in the semi-continuous casting process of magnesium alloys, has molds with many structures and uses, and there are many reasons for the change of the liquid level in the mold, among which the flow out of the outlet of the catheter Melt flow instability is one of the main factors, and when the flow rate of the catheter pipe cannot follow the casting change in time when the casting speed is increased or decreased during the casting process, it is also easy to cause the liquid level change in the mold

In addition, the liquid level control in the existing magnesium alloy semi-continuous casting mold is realized by adjusting the position of the plug rod in the catheter, and then controlling the amount of magnesium alloy melt flowing into the mold, but this method has certain limitations. The problem is that because it is impossible to ensure that the blocking rod is just at the center of the outlet of the catheter, the size of the slit between the catheter and the blocking rod will be different, so that the high-temperature melt will flow out unevenly, which will affect the shunting of the melt Effect

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