Low-pressure casting preparation method of aluminum alloy auxiliary frame

A low-pressure casting, aluminum alloy technology, applied in the field of alloy casting, to achieve the effect of good quality and high mechanical properties

Inactive Publication Date: 2017-07-07
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the low-pressure casting method is used to prepare...

Method used

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  • Low-pressure casting preparation method of aluminum alloy auxiliary frame
  • Low-pressure casting preparation method of aluminum alloy auxiliary frame
  • Low-pressure casting preparation method of aluminum alloy auxiliary frame

Examples

Experimental program
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Embodiment 1

[0022] Example 1: Formulating the alloy composition by weight percentage is 6.5% Si, 0.25-0.6% Mg, 0.05-0.30% Ti, 0-0.5% RE, Fe0.2%max, Cu0.2%max, Mn0.1%max , Zn0.1% max, the rest is Al. Alloy weight 300KG. Put the prepared aluminum alloy material into the crucible furnace, heat and melt. When the temperature of the aluminum alloy liquid rises to 715-725°C, add Al-5Ti-B refiner, Al-Sr modifier, and pass in argon gas for refining and degassing treatment. The refining and degassing treatment time is 15-20min. After refining and degassing treatment, the sample density reaches 2.65g.cm -3 above. After the refining is completed, the slag is removed, and the molten aluminum alloy is left to stand and cooled to 700°C for pouring.

[0023] Sand mold assembly: use machinable plastics to make subframe molds, and the molds are divided into two parts. Molded with Piper aluminum resin sand, close the box. Assemble the sand mold on the crucible furnace of the low pressure casting mach...

Embodiment 2

[0027] Example 2: Formulating the alloy composition by weight percentage is 7% Si, 0.25-0.6% Mg, 0.05-0.30% Ti, 0-0.5% RE, Fe0.2%max, Cu0.2%max, Mn0.1%max , Zn0.1% max, the rest is Al. Alloy weight 300KG. Put the prepared aluminum alloy material into the crucible furnace, heat and melt. When the temperature of the aluminum alloy liquid rises to 715-725°C, add Al-5Ti-B refiner, Al-Sr modifier, and pass in argon gas for refining and degassing treatment. The refining and degassing treatment time is 15-20min. After refining and degassing treatment, the sample density reaches 2.65g.cm -3 above. After the refining is completed, the slag is removed, and the molten aluminum alloy is left to stand and cooled to 710°C for pouring.

[0028] Sand mold assembly: use machinable plastics to make subframe molds, and the molds are divided into two parts. Molded with Piper aluminum resin sand, close the box. Assemble the sand mold on the crucible furnace of the low pressure casting machin...

Embodiment 3

[0032] Example 3: Formulating the alloy composition by weight percentage is 7.5% Si, 0.25-0.6% Mg, 0.05-0.30% Ti, 0-0.5% RE, Fe0.2%max, Cu0.2%max, Mn0.1%max , Zn0.1% max, the rest is Al. Alloy weight 300KG. Put the prepared aluminum alloy material into the crucible furnace, heat and melt. When the temperature of the aluminum alloy solution rises to 715-725°C, add Al-5Ti-B refiner and Al-Sr modifier, and pass in argon gas for refining and degassing treatment. The refining and degassing treatment time is 15-20 minutes. After refining and degassing treatment, the sample density reaches 2.65g.cm -3 above. After the refining is completed, the slag is removed, and the molten aluminum alloy is left to stand and cooled to 715°C for pouring.

[0033] Sand mold assembly: use machinable plastics to make subframe molds, and the molds are divided into two parts. Molded with Piper aluminum resin sand, close the box. Assemble the sand mold on the crucible furnace of the low pressure ca...

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Abstract

The invention discloses a low-pressure casting preparation method of an aluminum alloy sub-frame, including the design of the chemical composition of the aluminum alloy material, the refinement treatment of alloy smelting and modification, the assembly of sand molds, the transfer of pressure-time curves, low-pressure casting molding, and casting heat treatment processes. Firstly, the aluminum alloy is prepared according to the percentage of weight and composition, put into the crucible melting furnace for melting, refining and modification and refinement treatment, assemble the sand mold on the crucible furnace of the low-pressure casting machine and align the sprue with the rising pipe, and call the pressure time curve , low-pressure pressure filling and pressure maintaining to solidify the sub-frame castings to obtain aluminum alloy sub-frame castings, and then perform T6 heat treatment on the castings to obtain aluminum alloy sub-frames that can be loaded into the test and collect data requirements.

Description

technical field [0001] The invention relates to a low-pressure casting preparation method of an aluminum alloy sub-frame, belonging to the technical field of alloy casting. Background technique [0002] The sub-frame is an important load-bearing part of the automobile chassis. It is a bracket that supports the front and rear axles and suspensions, so that the axles and suspensions are connected to the main frame through it. The subframe is one of the important chassis components related to the safety, comfort and handling of the car. The sub-frame material is mainly made of steel plate, which is gradually being replaced by lightweight aluminum alloy. It is an indisputable fact that aluminum alloy sub-frames are widely used in passenger cars. [0003] As customers have higher and higher requirements for fuel economy, comfort, and good handling, foreign advanced OEMs generally use cast aluminum alloy sub-frames. This is because aluminum alloys are light in weight, which is co...

Claims

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Application Information

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IPC IPC(8): B22D18/04
CPCB22D18/04
Inventor 修坤王成刚孙树臣佟国栋张世超夏光艳吴景波裴延军白洪伟
Owner CHINA FIRST AUTOMOBILE
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