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A kind of formula of cast aluminum alloy wheel hub

A technology for casting aluminum alloys and aluminum alloys, which is applied in the formulation field of casting aluminum alloy wheels, can solve problems such as easy loosening of alloys, reduction of alloy compactness, and hydrogen absorption of aluminum liquid, so as to reduce pinhole rate and hydrogen content , strong adsorption effect

Active Publication Date: 2017-05-03
GUANGDONG DCENTI AUTO PARTS STOCK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chemical properties of Sr are extremely active, and it is easy to oxidize. It is easy to make the aluminum liquid absorb hydrogen, and the alloy is easy to loose, resulting in a decrease in the compactness of the alloy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] In this embodiment, the formula of the cast aluminum alloy wheel hub is composed of: Si 6.5%, Mg 0.40%, Fe 0.12%, Cu 0.02%, Mn 0.02%, Zn 0.05%, Ti 0.10%, Sr 0.2%, Cr 0.01%, Zr 0.01%, B0.025%, mixed light rare earth 0.8%, Al 91.745%.

Embodiment 2

[0018] In this embodiment, the formula of the cast aluminum alloy wheel hub is composed by weight percentage: 7.0% Si, 0.28% Mg, 0.10% Fe, 0% Cu, 0.05% Mn, 0.04% Zn, 0.15% Ti, Sr 0.4%, Cr 0.05%, Zr0.02%, B 0.05%, mixed light rare earth 0.4%, Al 91.46%.

Embodiment 3

[0020] In this embodiment, the formula of the cast aluminum alloy wheel hub is composed of: 7.5% Si, 0.30% Mg, 0% Fe, 0.01% Cu, 0.04% Mn, 0.045% Zn, 0.20% Ti, Sr 0.6%, Cr 0.05%, Zr0.015%, B 0.05%, mixed light rare earth 0.6%, Al 90.59%.

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Abstract

The invention discloses a formula for casting aluminum alloy hubs. The formula is prepared from, by weight, 6.5-7.5% of Si, 0.28-0.45% of Mg, 0-0.12% of Fe, 0-0.02% of Cu, 0.02-0.05% of Mn, 0.04-0.05% of Zn, 0.10-0.20% of Ti, 0.2-0.6% of Sr, 0.01-0.05% of Cr, 0.01-0.02% of Zr, 0.025-0.05% of B, 0.4-0.8% of mixed light rare earth and the balance Al. Due to the fact that Sr and the mixed rare earth metal serve as an alterant together, the surface defects of alloy phases can be overcome, surface tension on a new-phase interface and an old-phase interface is reduced, and the problem that compactness is reduced when only Sr is added is avoided. Zr, Ti, Cr and Al work together, the cast structure is further refined, and the hardness and the toughness of aluminum alloy are improved.

Description

technical field [0001] The invention relates to a material formula of a wheel hub, in particular to a formula of a cast aluminum alloy wheel hub. Background technique [0002] At present, A356 aluminum alloy is mostly used as automobile hub in China. A356 aluminum alloy is a eutectic cast Al-Si alloy, which is a cast aluminum alloy with excellent comprehensive properties. It not only has good casting properties (such as good fluidity, small linear shrinkage, no tendency to thermal cracking), can cast thin-walled and complex-shaped castings, but also has high strength, good plasticity and high impact toughness through heat treatment. , thus becoming the material of choice for cast aluminum alloy wheels. However, when the Al-Si alloy is prepared by the conventional casting process, due to the slow cooling rate, the segregation of Si is serious and the distribution is not uniform, especially when the Si content is high, the primary Si is very coarse, lath-like or polygonal, e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02
CPCC22C21/02
Inventor 谭红建
Owner GUANGDONG DCENTI AUTO PARTS STOCK LTD
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