Liquid guiding device and method for stabilizing and controlling flow in magnesium alloy semi-continuous casting process

Abstract

The invention discloses a liquid guide device and method for stabilizing and controlling flow in a magnesium alloy semi-continuous casting process, belonging to the field of casting. The liquid guide device for stable flow control in the semi-continuous casting process of magnesium alloy is provided with a liquid guide control actuator and a protective gas control device; The device is used to adjust and control the rise and fall of the shunt device, and the control shunt device is used to control the flow rate of the magnesium alloy melt at the liquid end of the catheter; the crucible containing the magnesium alloy and the protective gas storage tank are connected through the protective gas pipeline, and the protective gas pipeline There is a shielding gas control device on it, which is used to control the pressure inside the crucible by adjusting the shielding gas output flow. The device can stably transmit the high-temperature melt during the semi-continuous casting process, ensure the stability of the liquid level in the mold, improve the surface quality and smoothness of the product, reduce the possibility of slag inclusion, and realize stable and safe casting production. 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...

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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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