Low-pressure casting method of aluminum alloy automobile hub

A technology of automobile wheel hub and low-pressure casting, which is applied in the field of low-pressure casting and casting. cracking and other problems, to achieve the effect of optimizing process parameters and heat treatment parameters and improving performance

Active Publication Date: 2012-03-07
QINHUANGDAO XINGLONG WHEEL HUB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A356.2 is a hypoeutectic aluminum-silicon alloy with a silicon content of about 7%. Its conventional structure is inhomogeneous a-dendrites with thick massive and needle-like silicon distributed between them. The form of silicon causes stress concentration. It reduces the mechanical properties such as tensile strength and flash plasticity such as elongation of aluminum alloy, and at the same time increases the tendency of thermal cracking and shrinkage porosity during solidification, reducing the mechanical properties of aluminum alloy wheels; in order to reduce the harmfulness of irregular silicon forms In actual work, the aluminum alloy solution is treated by adding a sodium-containing salt or a strontium-containing master alloy to change the distribution and form of silicon in the aluminum alloy; but under the produc

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example one

[0018] A low-pressure casting method for aluminum alloy automobile wheels includes the following steps:

[0019] a. The aluminum alloy is prepared, and its material composition percentage ratio is: Si: 6.8%, Mg: 1.0%, Ti: 0.1%, Cu: 0.8%, Zn: 0.2%; Fe, Mn, Sn, Pb and other impurity elements The total amount does not exceed 0.5%, the rest is Al;

[0020] b. Heat the prepared aluminum alloy in a melting furnace to melt. After the alloy is completely melted, adjust the temperature of the aluminum liquid to 760°C, and use Al-Ti-BC refiner for refinement treatment, and the added amount is melting 0.2% of the total mass of the alloy; adjust the temperature of the molten aluminum to 750°C, use rare earth modifiers for modification, and add 0.5% of the total mass of the smelted alloy; adjust the temperature of the molten aluminum to 710°C, and use refining agents for refining Treatment, the amount added is 0.6% of the total mass of the smelted alloy; finally, the slag i...

Example Embodiment

[0024] Example two

[0025] A low-pressure casting method for aluminum alloy automobile wheels includes the following steps:

[0026] a. Prepare aluminum alloy, and its material composition percentage ratio is: Si: 7.2%, Mg: 0.6%, Ti: 0.2%, Cu: 0.5%, Zn: 0.5%; Fe, Mn, Sn, Pb and other impurity elements The total amount does not exceed 0.5%, the rest is Al;

[0027] b. Heat the prepared aluminum alloy in a melting furnace for melting. After the alloy is completely melted, adjust the temperature of the aluminum liquid to 770°C, and use Al-Ti-BC refiner for refinement treatment. 0.1% of the total mass of the alloy; adjust the temperature of the molten aluminum to 760°C, use rare earth modifiers for modification, and add 0.3% of the total mass of the smelted alloy; adjust the temperature of the molten aluminum to 730°C, and use the refining agent for refining , The added amount is 0.5% of the total mass of the smelted alloy; finally, the slag is skimmed, and the aluminum alloy liquid i...

Example Embodiment

[0031] Example three

[0032] A low-pressure casting method for aluminum alloy automobile wheels includes the following steps:

[0033] a. The aluminum alloy is prepared, and its material composition percentage ratio is: Si: 7.0%, Mg: 0.8%, Ti: 0.15%, Cu: 0.6%, Zn: 0.35%; Fe, Mn, Sn, Pb and other impurity elements The total amount does not exceed 0.5%, the rest is Al;

[0034] b. Heat the prepared aluminum alloy in a melting furnace for melting. After the alloy is completely melted, adjust the temperature of the aluminum liquid to 765°C, and use Al-Ti-BC refiner for refinement treatment, and the added amount is for melting 0.15% of the total mass of the alloy; adjust the temperature of the molten aluminum to 755°C, use rare earth modifiers for modification, and add 0.35% of the total mass of the smelted alloy; adjust the temperature of the molten aluminum to 720°C, and use the refining agent for refining , The addition amount is 0.55% of the total mass of the smelted alloy; finally...

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Abstract

The invention discloses a low-pressure casting method of an aluminum alloy automobile hub. In the method, by optimizing alloy component design, adding a proper amount of Al-Ti-B-C refining agent and rare-earth modifying agent, low-pressure casting process parameters and thermal treatment parameters are optimized, so that the prepared automobile hub is provided with a tissue consisting of fine and uniform a dendritic crystal and fine and uniform worm-shaped or spherical silicon, and the performance of the aluminum alloy automobile hub is improved.

Description

technical field [0001] The invention relates to the field of casting, in particular to the field of low-pressure casting. Background technique [0002] Car wheels rotate at high speed during driving and carry various complex stresses caused by car weight, driving torque and uneven road surface. The wheel materials are required to have high strength, high elastic modulus and high fatigue strength to meet the requirements of automotive products. safety and reliability requirements. The car wheel material is initially made of steel plate, which is formed by extrusion after welding. Due to the complicated manufacturing process, heavy weight and the surface quality of the wheel can not meet the requirements of modern automobile development, the car wheel material has been replaced by aluminum alloy steel plate; due to light weight , corrosion resistance, simple processing method, good room temperature and low temperature impact toughness and excellent appearance quality and othe...

Claims

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Application Information

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IPC IPC(8): B22D18/04C22C21/04C22C1/02C22C1/06C22F1/043B60B27/00
Inventor 陈伟军
Owner QINHUANGDAO XINGLONG WHEEL HUB
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