Aluminum alloy ingot

Abstract

The invention discloses an aluminum alloy ingot. The aluminum alloy ingot comprises, by weight , 9.6%-12.0% of Si, 1.5%-3.5% of Cu, less than 0.3% of Mg, less than 1.3% of Fe, less than 1.0% of Zn, less than 0.5% of Mn, less than 0.5% of Ni, less than 0.3% of Sn, 1%.-2%. of Sr, 1%.-2%. of Ti, 1%.-2%. of B and the balance Al. The Si element is added to the aluminum alloy ingot so that strength and toughness of the aluminum alloy ingot are effectively improved, and the Ti and B elements added into the aluminum alloy ingot enables a die-casting product to generate good grain refinement, casting cracks are effectively avoided, the appearance of a casting is improved, the surface quality of the ingot is improved, particularly cold shut of the ingot is reduced, and the impact toughness of the aluminum alloy ingot is effectively improved by 15%-20% on the condition that the strength of the aluminum alloy ingot is not reduced.

Description

technical field [0001] The invention relates to an aluminum alloy ingot, in particular to an aluminum alloy ingot for high pressure casting. Background technique [0002] Aluminum alloy is an extended product of pure aluminum. The density of pure aluminum is small (ρ=2.7g / m3), about 1 / 3 of that of iron, and its melting point is low, about 660°C. Aluminum has a face-centered cubic structure, so it has High plasticity (δ: 32-40%, ψ: 70-90%), so it is easy to process, can be made into various profiles and plates, and has good corrosion resistance. However, the strength of pure aluminum is very low, so it is not suitable for structural materials. Through long-term production practice and scientific experiments, people have gradually strengthened aluminum by adding alloying elements and using heat treatment, which resulted in a series of aluminum alloys. [0003] The alloy formed by adding certain elements to pure aluminum can also have high strength while maintaining the advan...

AI Technical Summary

Problems solved by technology

The cast aluminum is manufactured in the form of "ingots", and then cast after remelting; the aluminum alloy ingots of the traditional process are high-pressure cast after melting, and the surface of aluminum alloy products is often prone to cold shut, cracks and other common product defects. This kind of product is bad. Although it can be controlled by adjusting the molding parameters of the die-casting machine and adjusting the mold temperature, the effect is not obvious.