Compound modified zinc alloy

Abstract

The invention discloses a compound modified zinc alloy, which is prepared by adding a rare earth and nickel-titanium compound modifier in a conventional die-cast zinc alloy production process and smelting. The compound modified zinc alloy comprises the following components in percentage by weight: 3.9-4.0% of aluminum, 0.03-0.04% of magnesium, less than 0.07% of impurity ingredients containing lead, iron, cadmium, tin and the like and the balance of zinc; and the compound modifier is a complex of rare earth metal and a nickel-titanium additive and accounts for 0.00020-0.0050% by weight. The modified zinc alloy disclosed by the invention has the advantages of excellent mechanical property and machining performance, low melting point temperature, good corrosion resistance, difficulty in cracking and deformation, high surface smoothness of a die-cast piece, extremely excellent balance between physical property and mechanical property and excellent castability, and is suitable for various die-cast pieces.

Description

technical field [0001] The invention relates to a method for manufacturing a zinc alloy product, which belongs to the field of smelting technology of alloy products. Background technique [0002] Zinc alloys are widely used in the manufacture of various products because they are resistant to corrosion in the atmosphere and the residual waste is easy to recycle and remelt. High-aluminum zinc alloy is a new type of casting alloy with great development prospects. It has high strength, but poor plasticity and toughness. If its mechanical properties can be further improved, the reliability of use will be improved and the scope of application will be expanded. In order to improve the as-cast ductility of high-aluminum-zinc alloys, rare earth elements are often used for modification to refine the grains and greatly improve their ductility. On the other hand, element additives such as nickel agent and titanium agent are often added to promote smelting in the smelting of zinc alloys...

AI Technical Summary

Problems solved by technology

On the other hand, element additives such as nickel agent and titanium agent are often added to promote smelting in the smelting of zinc alloys, but rare earth modifiers and nickel-titanium additives are used at the same time to obtain high-quality zinc alloy products, and there are few successful cases.

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