Semi-liquid-state forging method for magnesium alloy rim

Abstract

The invention relates to a semi-liquid-state forging method for a magnesium alloy rim. The semi-liquid-state forging method comprises the following steps that a magnesium alloy processing system including a slurry outputting flow pass, a storing pipe, a screw and a heater is provided; a magnesium alloy raw material located in the storing pipe is heated through the heater and is stirred through thescrew, and thus semi-liquid-state magnesium alloy slurry where spherical magnesium alloy crystal particles and a liquid-state magnesium alloy coexist in a solid-liquid mode is obtained; a forging mold is filled with the semi-liquid-state magnesium alloy slurry by the screw through the slurry outputting flow pass; and thus the semi-liquid-state magnesium alloy slurry which the forging mold is filled with is forged, pressed and solidified, and thus the magnesium alloy rim is obtained. The semi-liquid-state forging method for the magnesium alloy rim has the advantages of lowering the manufacturing cost of the magnesium alloy rim and improving the quality of the magnesium alloy rim.

Description

technical field [0001] The invention relates to a semi-liquid forging method for a magnesium alloy wheel rim. Background technique [0002] Magnesium alloys have been widely used in transportation, electronic products and other fields in recent years because of their low density, good thermal conductivity, high specific strength, high specific stiffness, excellent damping capacity, and easy recycling, especially in the automotive industry. Circle manufacturing. Since the rim of the car belongs to the unsprung mass, every 1 kg reduction in the unsprung mass is equivalent to a weight loss of about 10 kg for the entire car. Taking the 16-inch magnesium alloy forged rim as an example instead of the 16-inch aluminum alloy forged rim, each Each rim can reduce weight by about 5 kg, so when all four 16-inch aluminum alloy forged wheels of a car are replaced with 16-inch magnesium alloy forged wheels, it is equivalent to a weight reduction of about 200 kg for the entire car. kg, wh...

AI Technical Summary

Problems solved by technology

[0004] However, since the content of non-metallic impurities in magnesium alloy cast rods is difficult to reduce, the quality of magnesium alloy cast rods is difficult to guarantee, resulting in the problem that magnesium alloy forged wheels are prone to irregular cracks, which affects the safety of use

In addition, the manufacturing method of the magnesium alloy forged wheel rim in the prior art needs to perform heat homogenization treatment on the magnesium alloy cast rod first, and requires the use of large-scale forging equipment, resulting in a lengthy process and a large amount of energy consumption and cost input

Furthermore, the magnesium alloy cast rods produced by the direct water-cooled semi-continuous casting method tend to have dendrites, columnar crystals or coarse equiaxed crystals, which makes the forged magnesium alloy rims have internal defects, thereby reducing the quality of magnesium alloy forging. Mechanical properties of the rim

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