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Method of preparing aluminum alloy wheel hub with high structural strength

A technology of aluminum alloy wheel hub and high structure, which is applied in the field of metal material processing, can solve the problems of complex process, high cost, difficult demoulding, etc., and achieve the effect of simple operation and small mold damage

Inactive Publication Date: 2015-06-03
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the low-cost low-pressure casting process is mainly used in domestic aluminum alloy wheel manufacturing, followed by the most convenient gravity casting process. However, the structural strength of the wheel hub prepared by the casting method is generally not high, and the surface quality of the casting is not satisfactory. , not suitable for the use of high-end cars; in addition, some wheels are produced by forging method. The conventional forging method uses a press to make the whole ingot directly formed on the mold. However, due to the high manufacturing cost of conventional forged wheels, energy and The consumption of raw materials is large and the process is complicated, and has not been applied on a large scale
In addition, in the above various preparation processes, the mold is easily damaged, the cost of its maintenance and replacement is huge, and it is difficult to demould

Method used

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  • Method of preparing aluminum alloy wheel hub with high structural strength
  • Method of preparing aluminum alloy wheel hub with high structural strength
  • Method of preparing aluminum alloy wheel hub with high structural strength

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Method for preparing 21-inch aluminum alloy wheel hub with high structural strength

[0022] (1) Using 6061 aluminum alloy as raw material, melt it in a crucible-type resistance furnace, transfer the smelted aluminum alloy into a static furnace for secondary deep purification, and finally add Al-5Ti-1B modifier, and stand still to obtain aluminum alloy Alloy melt;

[0023] (2) The diversion groove, crystallizer, and dummy bar of the pull-down semi-continuous casting machine are pre-dried, and the aluminum alloy melt is cast by the pull-down semi-continuous casting machine to obtain a semi-solid crystal with equiaxed grains. Solid 6061 aluminum alloy blank, the casting parameters are: temperature is 720°C, electromagnetic stirring frequency is 20Hz, current intensity is 60A, casting speed is 70mm / min, stable casting speed is 110mm / min, liquid surface depth is 145mm, cooling The water flow is 0.095m 3 / min;

[0024] (3) The semi-solid 6061 aluminum alloy billet is heat...

Embodiment 2

[0029] Method for preparing 15-inch aluminum alloy wheel hub with high structural strength

[0030] (1) Using 6061 aluminum alloy as raw material, melt it in a crucible-type resistance furnace, transfer the smelted aluminum alloy into a static furnace for secondary deep purification, and finally add Al-5Ti-1B modifier, and stand still to obtain aluminum alloy Alloy melt;

[0031] (2) The diversion groove, crystallizer, and dummy bar of the pull-down semi-continuous casting machine are pre-dried, and the aluminum alloy melt is cast by the pull-down semi-continuous casting machine to obtain a semi-solid crystal with equiaxed grains. Solid 6061 aluminum alloy blank, the casting parameters are: temperature is 720°C, electromagnetic stirring frequency is 20Hz, current intensity is 60A, casting speed is 60mm / min, stable casting speed is 100mm / min, liquid surface depth is 140mm, cooling The water flow is 0.09m 3 / min;

[0032] (3) The semi-solid 6061 aluminum alloy billet is heate...

Embodiment 3

[0037] Method for preparing 17-inch aluminum alloy wheel hub with high structural strength

[0038] (1) Using 6061 aluminum alloy as raw material, melt it in a crucible-type resistance furnace, transfer the smelted aluminum alloy into a static furnace for secondary deep purification, and finally add Al-5Ti-1B modifier, and stand still to obtain aluminum alloy Alloy melt;

[0039] (2) The diversion groove, crystallizer, and dummy bar of the pull-down semi-continuous casting machine are pre-dried, and the aluminum alloy melt is cast by the pull-down semi-continuous casting machine to obtain a semi-solid crystal with equiaxed grains. Solid 6061 aluminum alloy blank, the casting parameters are: temperature is 720°C, electromagnetic stirring frequency is 20Hz, current intensity is 60A, casting speed is 60mm / min, stable casting speed is 100mm / min, liquid surface depth is 140mm, cooling The water flow is 0.09m 3 / min;

[0040](3) The semi-solid 6061 aluminum alloy billet is heated...

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Abstract

The invention relates to a method of preparing an aluminum alloy wheel hub with high structural strength and belongs to the technical field of metal material processing. The method comprises the steps of smelting a 6061 aluminum alloy, preparing a semisolid 6061 aluminum alloy blank with equiaxed grains by using an electromagnetic casting technique, then carrying out thixotropic die forging on the semisolid 6061 aluminum alloy blank, and carrying out T6 heat treatment on a formed part at last. The whole technical process is simple to implement; small damage is caused to a die; the aluminum alloy wheel hub with the high structural strength can be prepared; and the hardness, tensile strength and elongation of the prepared 15-21in aluminum alloy wheel hub are higher than those of an aluminum alloy wheel hub prepared by the conventional casting method by 50-60Hv, 160-170MPa and 2-3% respectively.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, and in particular relates to a method for preparing an aluminum alloy wheel hub with high structural strength. Background technique [0002] Automobile wheels are important safety and appearance parts of automobiles. Due to the requirements of automobile safety, stability, maneuverability, comfort, energy saving, environmental protection and other aspects, the requirements for wheels lie in high precision of size and shape, Good dynamic balance, high fatigue strength, good stiffness and elasticity, light weight, beautiful appearance, etc. Therefore, the choice of wheel material is very important. [0003] As the traditional material of wheels, hot-rolled low-carbon steel occupies an absolute dominant position in the rim and spoke materials of passenger car steel wheels in the 1970s, but due to the advantages of aluminum alloy in strength and weight, gradually Get the attention...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C21/08C22F1/047
Inventor 王平刘思冕张东
Owner NORTHEASTERN UNIV
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