A kind of aluminum alloy material for automobile wheel hub

Abstract

The invention discloses an aluminum alloy material for an automobile hub. The material comprises the following components in percentage by mass: 12-15% of Si, 14.4-22.5% of Mg, 1-1.5% of Cu, 0.2-1.3% of Fe, 0.3-0.9% of Zn, 0.1-0.4% of Mn, 0.3-0.6% of Nb, 0.1-0.3% of Ni, 1-1.8% of Li, 0.1-1.5% of Re, 0.1-0.3% of Cr, 0.5-1% of Sr, 0.3-0.5% of Sn, 1-2% of mixed rare earth and the balance of Al. As aluminum is used as a main substance of the alloy, the density of the material is reduced, and the purpose of lightening the automobile hub is achieved; due to adoption of the element Sr added into the aluminum alloy, the strength and the toughness of the aluminum alloy are effectively improved; due to adoption of elements Ti and B, good grain refinement can be achieved for a pressure cast product, cast crack can be effectively overcome, and meanwhile good heat radiation properties are achieved.

Description

Technical field

[0001] The invention relates to the technical field of aluminum alloy materials, in particular to the technical field of aluminum alloy materials for automobile wheel hubs.

Background technique

[0002] The density of pure aluminum is small (ρ=2.7g / cm3), about 1 / 3 of that of iron, and its melting point is low (660°C). Aluminum has a face-centered cubic structure, so it has high plasticity (δ: 32-40%, ψ:70~90%), easy to process, can be made into various profiles and plates, and has good corrosion resistance; but the strength of pure aluminum is very low, and the annealed state σb value is about 8kgf / mm 2 , 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. The alloy formed by adding certain elements can have high strength while maintaining the advant...

Examples

Embodiment 1

[0011] The present invention is an aluminum alloy material for automobile hub, which comprises the following components and the mass ratio of each component is: Si: 12%, Mg: 14.4%, Cu: 1%, Fe: 0.2%, Zn: 0.3%, Mn : 0.1%, Nb: 0.3%, Ni: 0.1%, Li: 1%, Re: 0.1%, Cr: 0.1%, Sr: 0.5%, Sn: 0.3%, misch: 1%, the balance is Al, The mixed rare earth is composed of Ce, Pr, La, Eu and Nd, wherein Ce: 30 parts, Pr: 20 parts, La: 35 parts, Eu: 15 parts, Nd: 10 parts, the ratio of Mg to Si 1.2:1, the Mg formed by the combination of Mg and Si in the alloy 2 The precipitated phase of Si is β"phase.

Embodiment 2

[0013] The present invention is an aluminum alloy material for automobile hub, which comprises the following components and the mass ratio of each component is: Si: 13%, Mg: 17%, Cu: 1.2%, Fe: 0.5%, Zn: 0.6%, Mn : 0.2%, Nb: 0.4%, Ni: 0.2%, Li: 1.4%, Re: 0.5%, Cr: 0.2%, Sr: 0.7%, Sn: 0.4%, mixed rare earth: 1.5%, the balance is Al, The mixed rare earth is composed of Ce, Pr, La, Eu and Nd, wherein Ce: 35 parts, Pr: 25 parts, La: 40 parts, Eu: 18 parts, Nd: 12 parts, the ratio of Mg to Si 1.3:1, the Mg formed by the combination of Mg and Si in the alloy 2 The precipitated phase of Si is β"phase.

Embodiment 3

[0015] The present invention is an aluminum alloy material for automobile hub, which comprises the following components and the mass ratio of each component is: Si: 15%, Mg: 22.5%, Cu: 1.5%, Fe: 1.3%, Zn: 0.9%, Mn : 0.4%, Nb: 0.6%, Ni: 0.3%, Li: 1.8%, Re: 1.5%, Cr: 0.3%, Sr: 1%, Sn: 0.5%, misch: 2%, the balance is Al, The mixed rare earth is composed of Ce, Pr, La, Eu and Nd, wherein Ce: 40 parts, Pr: 30 parts, La: 45 parts, Eu: 20 parts, Nd: 15 parts, the ratio of Mg to Si 1.5:1, the Mg formed by the combination of Mg and Si in the alloy 2 The precipitated phase of Si is β"phase.

[0016] The invention uses aluminum as the main material of the alloy to reduce the density of the material and realize the lightweight of the automobile wheel hub. The strontium element added in the aluminum alloy can effectively improve the strength and toughness of the aluminum alloy, and the addition of strontium in the aluminum alloy ingot The titanium and boron elements in the die-casting pr...

Technical field

[0001] The invention relates to the technical field of aluminum alloy materials, in particular to the technical field of aluminum alloy materials for automobile wheel hubs.

Background technique

[0002] The density of pure aluminum is small (ρ=2.7g / cm3), about 1 / 3 of that of iron, and its melting point is low (660°C). Aluminum has a face-centered cubic structure, so it has high plasticity (δ: 32-40%, ψ:70~90%), easy to process, can be made into various profiles and plates, and has good corrosion resistance; but the strength of pure aluminum is very low, and the annealed state σb value is about 8kgf / mm 2 , 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. The alloy formed by adding certain elements can have high strength while maintaining the advant...

Examples

Embodiment 1

[0011] The present invention is an aluminum alloy material for automobile hub, which comprises the following components and the mass ratio of each component is: Si: 12%, Mg: 14.4%, Cu: 1%, Fe: 0.2%, Zn: 0.3%, Mn : 0.1%, Nb: 0.3%, Ni: 0.1%, Li: 1%, Re: 0.1%, Cr: 0.1%, Sr: 0.5%, Sn: 0.3%, misch: 1%, the balance is Al, The mixed rare earth is composed of Ce, Pr, La, Eu and Nd, wherein Ce: 30 parts, Pr: 20 parts, La: 35 parts, Eu: 15 parts, Nd: 10 parts, the ratio of Mg to Si 1.2:1, the Mg formed by the combination of Mg and Si in the alloy 2 The precipitated phase of Si is β"phase.

Embodiment 2

[0013] The present invention is an aluminum alloy material for automobile hub, which comprises the following components and the mass ratio of each component is: Si: 13%, Mg: 17%, Cu: 1.2%, Fe: 0.5%, Zn: 0.6%, Mn : 0.2%, Nb: 0.4%, Ni: 0.2%, Li: 1.4%, Re: 0.5%, Cr: 0.2%, Sr: 0.7%, Sn: 0.4%, mixed rare earth: 1.5%, the balance is Al, The mixed rare earth is composed of Ce, Pr, La, Eu and Nd, wherein Ce: 35 parts, Pr: 25 parts, La: 40 parts, Eu: 18 parts, Nd: 12 parts, the ratio of Mg to Si 1.3:1, the Mg formed by the combination of Mg and Si in the alloy 2 The precipitated phase of Si is β"phase.

Embodiment 3

[0015] The present invention is an aluminum alloy material for automobile hub, which comprises the following components and the mass ratio of each component is: Si: 15%, Mg: 22.5%, Cu: 1.5%, Fe: 1.3%, Zn: 0.9%, Mn : 0.4%, Nb: 0.6%, Ni: 0.3%, Li: 1.8%, Re: 1.5%, Cr: 0.3%, Sr: 1%, Sn: 0.5%, misch: 2%, the balance is Al, The mixed rare earth is composed of Ce, Pr, La, Eu and Nd, wherein Ce: 40 parts, Pr: 30 parts, La: 45 parts, Eu: 20 parts, Nd: 15 parts, the ratio of Mg to Si 1.5:1, the Mg formed by the combination of Mg and Si in the alloy 2 The precipitated phase of Si is β"phase.

[0016] The invention uses aluminum as the main material of the alloy to reduce the density of the material and realize the lightweight of the automobile wheel hub. The strontium element added in the aluminum alloy can effectively improve the strength and toughness of the aluminum alloy, and the addition of strontium in the aluminum alloy ingot The titanium and boron elements in the die-casting pr...