Technology for processing lightweight anti-crack aluminum alloy for manufacturing vehicle body

A processing technology and body manufacturing technology, applied in the field of alloys, can solve problems affecting the mechanical properties, air tightness and corrosion resistance of aluminum alloy castings, large internal stress, and small specific gravity, so as to achieve excellent crack resistance and avoid shrinkage cavities And the effect of shrinkage and reduction of processing cost

Inactive Publication Date: 2017-05-24
ZHANGJIAGANG CITY GUANGDA MACHINERY FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the automobile manufacturing industry, aluminum alloy is a light metal material with small specific gravity and high strength. It is widely used in body processing. Its mechanical properties and casting properties are very good. Similarly, shrinkage cavities and shrinkage porosity will occur due to volume shrinkage during solidification, resulting in greater internal stress, which seriously affects the mechanical properties, air tightness and corrosion resistance of aluminum alloy castings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A processing technology for a light-weight crack-resistant aluminum alloy used in body manufacturing. The components of the light-weight crack-resistant magnesium-aluminum alloy and the mass percentages of each component are: Cu: 1.2%, Zn: 0.3%, Li: 0.1 %, Ni: 1.1%, Zr: 0.2%, Ti: 0.3%, Hf: 0.1%, Si: 1.5%, V: 0.3%, Mg: 0.6%, rare earth: 3.2%, and the rest is Al.

[0021] The specific processing technology is:

[0022] (1) Prepare a certain alloy raw material according to the ratio of metal elements in the light-weight and crack-resistant magnesium-aluminum alloy, put it into a vacuum induction furnace, heat it up to 820°C and melt it, and add a refining agent to refine it after it is completely melted into an alloy liquid;

[0023] (2) Add a modifier to the refined alloy liquid, raise the temperature to 920°C and keep it warm for 0.5h, then rapidly raise the temperature to 1000°C, and cast it into an aluminum alloy ingot at a rate of 35°C / min;

[0024] (3) When the surf...

Embodiment 2

[0030] A processing technology for a light-weight, crack-resistant aluminum alloy used in vehicle body manufacturing. The components and mass percentages of each component are: Cu: 2%, Zn: 5%, Li: 9 %, Ni: 2.1%, Zr: 0.5%, Ti: 0.5%, Hf: 0.7%, Si: 3.2%, V: 1%, Mg: 1.2%, rare earth: 15%, and the rest is Al.

[0031] The specific processing technology is:

[0032] (1) Prepare a certain alloy raw material according to the ratio of metal elements in the light-weight and crack-resistant magnesium-aluminum alloy, put it into a vacuum induction furnace, heat it up to 870°C and melt it, and add a refining agent to refine it after it is completely melted into an alloy liquid;

[0033] (2) Add a modifier to the refined alloy liquid, raise the temperature to 950°C and keep it for 1 hour, then rapidly raise the temperature to 1050°C, and cast it into an aluminum alloy ingot at a rate of 32°C / min;

[0034] (3) When the surface temperature of the aluminum alloy ingot drops to 320°C, put it i...

Embodiment 3

[0040]A processing technology for a light-weight, crack-resistant aluminum alloy used in body manufacturing. The components of the light-weight, crack-resistant magnesium-aluminum alloy and the mass percentages of each component are: Cu: 1.5-1.8%, Zn: 1.8-4% , Li: 1-7%, Ni: 1.3-1.8%, Zr: 0.3-0.5%, Ti: 0.4-0.5%, Hf: 0.2-0.5%, Si: 1.7-3%, V: 0.4-0.8%, Mg: 0.7-1%, rare earth: 5-12%, and the rest is Al.

[0041] The specific processing technology is:

[0042] (1) Prepare a certain alloy raw material according to the ratio of metal elements in the light-weight and crack-resistant magnesium-aluminum alloy, put it into a vacuum induction furnace, heat it up to 850°C and melt it, and add a refining agent to refine it after it is completely melted into an alloy liquid;

[0043] (2) Add a modifier to the refined alloy liquid, raise the temperature to 933°C and keep it warm for 0.7h, then rapidly raise the temperature to 1020°C, cool down at a rate of 30°C / min and cast it into an alumin...

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Abstract

The invention provides a technology for processing lightweight anti-crack aluminum alloy for manufacturing a vehicle body. The lightweight anti-crack aluminum alloy comprises the following components in percentage by mass: 1.2-2% of Cu, 0.3-5% of Zn, 0.1-9% of Li, 1.1-2.1% of Ni, 0.2-0.5% of Zr, 0.3-0.5% of Ti, 0.1-0.7% of Hf, 1.5-3.2% of Si, 0.3-1% of V, 0.6-1.2% of Mg, 3.2-15% of rare earth and the balance being Al. The processing technology has the beneficial effects that an original component proportion and an original technology are adopted for ensuring that the alloy does not shrink during cooling solidification, thus effectively avoiding defects such as shrinkage voids and shrinkage porosity; meanwhile, the remarkable improvement of processability and a mechanical property is further ensured due to the fine microscopic structures of the alloy; the processing cost of castings is reduced; and the vehicle body manufactured by utilizing the alloy is lightweight, has excellent crack resistance and corrosion-erosion resistance and can promote the rapid development of automobile casting technologies.

Description

technical field [0001] The invention belongs to the field of alloys, and in particular relates to a processing technology for a light-weight, crack-resistant aluminum alloy used in vehicle body manufacturing. Background technique [0002] With the development of science and technology, vehicles represented by automobiles need to further improve fuel efficiency by reducing the weight of the body. In the automobile manufacturing industry, aluminum alloy is a light metal material with small specific gravity and high strength. It is widely used in body processing. Its mechanical properties and casting properties are very good. Similarly, shrinkage cavities and shrinkage porosity will occur due to volume shrinkage during solidification, resulting in greater internal stress, which seriously affects the mechanical properties, air tightness and corrosion resistance of aluminum alloy castings. [0003] Therefore, developing an aluminum alloy in order to solve the above problems is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C21/10C22C1/02C22C1/06
CPCC22C21/00C22C1/026C22C1/06C22C21/10
Inventor 罗晓芳顾金才徐卫明周青春
Owner ZHANGJIAGANG CITY GUANGDA MACHINERY FORGING
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