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