Aluminum die-casting alloy and manufacturing process thereof

Abstract

The invention discloses an aluminum die-casting alloy and a manufacturing process thereof. The aluminum die-casting alloy comprises the following substances in weight ratio: 8.0-11.5% of silicon, 0.3-0.8% of manganese, 0.08-0.4% of magnesium, less than or equal to 0.4% of iron, less than or equal to 0.1% of copper, less than or equal to 0.1% of zinc, less than or equal to 0.15% of titanium, 0.05-0.5% of molybdenum, 0.05-0.3% of zirconium, 30-300 ppm of strontium or 5-30 ppm of sodium and / or 1-30 ppm of calcium, and the balance of aluminum and inevitable impurities, and the aluminum die-castingalloy is used for long-effect refining, wherein gallium phoshpide and / or indium phosphide with phosphor amount being 1-250 ppm is used for particle refining; and titanium and boron which are added inthe form of an aluminum matrix alloy containing 1-2wt% of Ti and 1-2wt% of B are used for particle refining. The aluminum die-casting alloy adopts a rare-earth reinforced aluminum alloy material anda precise die-casting technology, can perform light optimized design on a product structure on the premise of meeting using requirements as tensile strength, yield strength, hardness and the like of the aluminum die-casting alloy are improved, and technically meet higher requirements, on safety performance, of the current safety belt industry.

Description

technical field [0001] The invention relates to an aluminum die-casting alloy and its manufacturing process, which belongs to the technical field of casting equipment manufacturing process. Background technique [0002] Aluminum die-casting is a kind of pressure-casting parts. It uses a pressure-casting mechanical die-casting machine with a casting mold installed. The heated liquid aluminum or aluminum alloy is poured into the feed port of the die-casting machine. After being die-cast by the die-casting machine, the mold is cast out. Aluminum parts or aluminum alloy parts of the same shape and size, such parts are usually called aluminum die casting. Aluminum die-casting has different names in different places, such as aluminum die-casting parts, die-casting aluminum parts, die-casting aluminum parts, die-casting aluminum, aluminum die-casting, aluminum alloy die-casting parts, etc. Because metal aluminum and aluminum alloy have good fluidity and plasticity, and the casting...

AI Technical Summary

Problems solved by technology

[0003] In view of the problems existing in the above-mentioned prior art, the present invention provides an aluminum die-casting alloy and its manufacturing process, which overcomes the defects of insufficient compressive and tensile strength of the aluminum alloy in the prior art, simplifies the process flow, and improves the mechanical properties of the cast aluminum alloy. Less processing steps, high yield, suitable for mass production