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Aluminum alloy casting rod for car hub and preparing method of rod

A technology for automobile wheel hub and aluminum alloy, which is applied in the field of aluminum alloy cast rod for automobile wheel hub and its preparation, can solve the problems of low hardness, poor mechanical properties and low mechanical properties of aluminum alloy wheels, and achieve excellent impact toughness and corrosion resistance. , Yield strength and elongation increase, good safety effect

Inactive Publication Date: 2018-08-24
益阳仪纬科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The wheel hub is one of the important parts of the vehicle driving system, and it is a security device with high requirements. It is closely related to the driving performance, riding comfort and safety of the vehicle. , good heat dissipation, easy molding, good shock absorption performance, etc., and are widely used in the current automobile industry, but the hardness of aluminum alloy wheels is smaller than that of steel wheels, and the mechanical properties are worse than steel wheels. One of the ways to improve mechanical properties An important focus is the improvement of aluminum alloy materials
[0003] The quality of the aluminum alloy material is a major factor affecting the quality of the wheel hub. A356 aluminum is commonly used in ordinary casting wheels, and the production of aluminum alloy wheels is one-time casting without reprocessing. The internal structure of the metal The structure has not changed, and there is a problem of low mechanical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The mass percentages of each component in the aluminum alloy cast rod are respectively:

[0025] Si0.9%, Mn0.08%, Mg1.0%, Zn0.3%, Ti0.4%, Be0.05%, Zr0.06%, Er0.06%, Ce0.04%, B0.4%, 0.08% of Cr, 0.03% of Nd, 0.04% of Fe, 0.1% of Mo, and 0.03% of Cu, and the remainder contains Al and unavoidable metal and non-metal impurity elements.

[0026] The role of Mn in the alloy: it can increase the recrystallization temperature. The dispersed particles of MnAl6 compound in the profile can hinder the growth of recrystallized grains and have a significant effect on improving the drawing efficiency. Mn can reduce and eliminate the tendency of intergranular corrosion.

[0027] The role of Fe in the alloy. When the alloy contains a small amount of Fe, it has no bad effect on the mechanical properties, but Fe can make the surface color of the product worse after anodizing. The impurity Fe in the alloy forms a metal compound to consume Si. When there is no excess S, a coarse FeAl6 pha...

Embodiment 2

[0049] Si1.0%, Mn0.06%, Mg0.8%, Zn0.3%, Ti0.4%, Be0.05%, Zr0.1%, Er0.03%, Ce0.01%, B0.2%, Cr 0.08%, Nd 0.02%, Fe 0.02%, Mo 0.06%, Cu 0.04%, and the remainder contains Al and unavoidable metal and non-metal impurity elements.

[0050] The preparation method of aluminum alloy cast rod for above-mentioned automobile hub comprises the steps:

[0051] Batching—smelting—stirring—alloying—refining—standstill—casting—homogenization.

[0052] Among them, the batching steps are: adopting the remelted aluminum ingot with the grade of A199.70, the primary magnesium ingot with Mg99.80, the fast-melting silicon of Si95F, and the manganese agent with the grade of 75Mn; -5T-B joins in line in line.

[0053] Further, the smelting step is:

[0054] Melt the aluminum raw material, magnesium, silicon components and covering agent in a melting furnace to 720°C, then add other alloy components except aluminum, magnesium, and silicon, continue to heat up to 740°C, and obtain an aluminum alloy aft...

Embodiment 3

[0060] Si1.5%, Mn0.1%, Mg1.5%, Zn0.5%, Ti0.6%, Be0.06%, Zr0.1%, Er0.1%, Ce0.05%, B0.6%, 0.1% of Cr, 0.06% of Nd, and the balance contains Al and unavoidable metal and non-metal impurity elements.

[0061] The preparation method of aluminum alloy cast rod for above-mentioned automobile hub comprises the steps:

[0062] Batching—smelting—stirring—alloying—refining—standstill—casting—homogenization.

[0063] Among them, the batching steps are: adopting the remelted aluminum ingot with the grade of A199.70, the primary magnesium ingot with Mg99.80, the fast-melting silicon of Si95F, and the manganese agent with the grade of 75Mn; -5T-B joins in line in line.

[0064] Further, the smelting step is:

[0065] Melt the aluminum raw material, magnesium, silicon components and covering agent in a melting furnace to 720°C, then add other alloy components except aluminum, magnesium, and silicon, continue to heat up to 740°C, and obtain an aluminum alloy after all the alloy elements are...

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Abstract

The invention discloses an aluminum alloy casting rod for a car hub and a preparing method of the rod. The aluminum alloy casting rod comprises, by mass percent, 0.3 to 1.5% of Si, 0.06 to 0.1% of Mn,0.8 to 1.5% of Mg, 0.2 to 0.5% of Zn, 0.3 to 0.6% of Ti, 0.04 to 0.06% of Be, 0.03 to 0.1% of Zr, 0.03 to 0.1% of Er, 0.01 to 0.05% of Ce, 0.2 to 0.6% of B, 0.08 to 0.1% of Cr, 0.02 to 0.06% of Nd and the balance Al and inevitable metal and non-metal impurity elements. According to the aluminum alloy bar, through adding of Er, Zr, Ce and the like, the metamorphic and refining effect on an aluminum alloy structure can be achieved, the casting rod is used for producing the aluminum alloy hub, the tensile strength, the yield and the ductility of the aluminum alloy hub can be greatly improved, and excellent impact toughness and corrosion resistance are achieved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy cast rod processing, in particular to an aluminum alloy cast rod for automobile wheel hubs and a preparation method thereof. Background technique [0002] The wheel hub is one of the important components of the vehicle driving system, and it is a security device with high requirements. It is closely related to the driving performance, riding comfort and safety of the vehicle. , good heat dissipation, easy molding, good shock absorption performance, etc., and are widely used in the current automobile industry. However, the hardness of aluminum alloy wheels is smaller than that of steel wheels, and their mechanical properties are worse than those of steel wheels. One of the ways to improve mechanical properties An important focus is on the improvement of aluminum alloy materials. [0003] The quality of the aluminum alloy material is a major factor affecting the quality of the wheel hub. A35...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C21/08C22C21/00C22C1/02C22C1/06
Inventor 李凯谢昭民
Owner 益阳仪纬科技有限公司
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