Filtering device for magnesium alloy casting and pouring

Abstract

The invention relates to a filtering device for magnesium alloy casting and pouring. The lower portion of a sprue is communicated with a casting die through a cross gate, a metal liquid filtering pool is arranged in the cross gate and comprises a left filtering pool box and a right filtering pool box which are buckled, the left filtering pool box is in a shape of a circular truncated cone, a metal liquid inlet is formed in the smaller bottom face of the left filtering pool box, the right filtering pool box is in a shape of a right trapezoid, and a magnesium alloy metal liquid outlet is formed in the smaller bottom face of the right filtering pool box; and a conic foamed ceramic filtering block is arranged in the left filtering pool box, the outer conic face of the conic foamed ceramic filtering block is matched with the conic face of the left filtering pool box, and the ceramic filtering block is made of magnesium oxide foamed ceramic. The foamed ceramic filtering block in the shape of the circular truncated cone is arranged in the filtering pool, influences on casting of an overall structure are avoided, the effective filtering area is large, and blockage can be avoided; and as the foamed ceramic is an efficient and stable alloy melt filtering medium, various impurities in the metal liquid in the pouring process can be effectively removed, the impurity content is obviously reduced, and the quality of a cast magnesium alloy is improved.

Description

technical field [0001] The invention belongs to the technical field of metal materials and metallurgy, and in particular relates to a filter device for magnesium alloy casting and pouring. Background technique [0002] As the lightest metal structural material, magnesium alloy has high specific strength and specific stiffness, excellent casting performance and high damping and anti-vibration performance, easy to recycle, has environmental protection characteristics, and has a very wide application prospect. Favored by industries such as electronic communication and automobile industry, it has become one of the most potential metal structural materials. [0003] In the magnesium alloy casting process, the liquid magnesium alloy is prone to oxidation, and the inclusions and slag inclusions in the magnesium alloy castings are one of the main defects. Therefore, how to effectively remove the inclusions and slag inclusions in the magnesium alloy liquid metal during casting is an ...

AI Technical Summary

Problems solved by technology

In the traditional magnesium alloy casting process, the most commonly used method to remove inclusions and slag defects is to place a filter device at an appropriate part of the gating system. Commonly used filter media include punched iron sheets, wire mesh and glass fiber filter screens. The common disadvantage is that the surface has no adsorption capacity, it is difficult to remove tiny particles, and it is even more difficult to remove flux impurities in magnesium alloy molten metal

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