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Special high-strength and high-toughness aluminum alloy material for automobile and manufacturing technology

A technology of aluminum alloy material and manufacturing process, which is applied in the field of aluminum alloy processing, can solve the problems of high sensitivity to stress corrosion corrosion and short service life of aluminum alloy, and achieve the effects of improving mechanical properties, reducing sensitivity index, and reducing cracking tendency

Inactive Publication Date: 2018-10-16
CHENGDU SUNSHINE ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of high stress corrosion sensitivity and short service life of the aluminum alloy used for manufacturing automobile parts in the above-mentioned prior art, the present invention proposes a special high-strength and tough aluminum alloy material and manufacturing process for automobiles.

Method used

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  • Special high-strength and high-toughness aluminum alloy material for automobile and manufacturing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A special high-strength and tough aluminum alloy material for automobiles, including raw materials with the following mass fractions:

[0026] Si: 1.20%; Mg: 1.0%; Mn: 0.80%; Cr: 0.20%; Ti: 0.10%; Cu: 0.10%; Fe: 0.30%; Zn: 0.20%; La: 0.06%; Ce: 0.09%; The balance is Al.

[0027] The manufacturing process of this embodiment includes the following steps:

[0028] S1 ingredients: Aluminum ingots, magnesium ingots, Al-Si master alloy ingots and Al-rare earth master alloy ingots are selected as furnace materials, and the mass fraction of each element is Si: 1.20%; Mg: 1.0%; Mn: 0.80%; Cr: 0.20 %; Ti: 0.10%; Cu: 0.10%; Fe: 0.30%; Zn: 0.20%; La: 0.06%; Ce: 0.09%; the balance is Al;

[0029] S2 Melting and casting: Load aluminum ingots, Al-Si master alloy ingots and Al-rare earth master alloy ingots into the melting furnace, heat up and melt the charge, and when the charge is heated until it softens and collapses, sprinkle a covering agent to protect the melt and continue hea...

Embodiment 2

[0035] A special high-strength and tough aluminum alloy material for automobiles, including raw materials with the following mass fractions:

[0036] Si: 0.80%; Mg: 0.80%; Mn: 0.50%; Cr: 0.10%; Ti: 0.08%; Cu: 0.04%; Fe: 0.20%; Zn: 0.10%; La: 0.11%; Ce: 0.14%; The balance is Al.

[0037] The manufacturing process of the special high-strength and tough aluminum alloy material for automobiles comprises the following steps:

[0038] S1 ingredients: Aluminum ingots, magnesium ingots, Al-Si master alloy ingots and Al-rare earth master alloy ingots are selected as furnace materials, and the mass fraction of each element is Si: 0.80%; Mg: 0.80%; Mn: 0.50%; Cr: 0.10 %; Ti: 0.08%; Cu: 0.04%; Fe: 0.20%; Zn: 0.10%; La: 0.11%; Ce: 0.14%; the balance is Al;

[0039] S2 Melting and casting: Load aluminum ingots, Al-Si master alloy ingots and Al-rare earth master alloy ingots into the melting furnace, heat up and melt the charge, and when the charge is heated until it softens and collapses,...

Embodiment 3

[0045] A special high-strength and tough aluminum alloy material for automobiles, including raw materials with the following mass fractions:

[0046] Si: 0.95%; Mg: 0.82%; Mn: 0.61%; Cr: 0.10%; Ti: 0.10%; Cu: 0.10%; Fe: 0.24%; Zn: 0.20%; La: 0.08%; Ce: 0.12%; The balance is Al.

[0047] The manufacturing process of the special high-strength and tough aluminum alloy material for automobiles comprises the following steps:

[0048] S1 ingredients: Aluminum ingots, magnesium ingots, Al-Si master alloy ingots and Al-rare earth master alloy ingots are selected as furnace materials, and the mass fraction of each element is Si: 0.95%; Mg: 0.82%; Mn: 0.61%; Cr: 0.10 %; Ti: 0.10%; Cu: 0.10%; Fe: 0.24%; Zn: 0.20%; La: 0.08%; Ce: 0.12%; the balance is Al;

[0049]S2 Melting and casting: Load aluminum ingots, Al-Si master alloy ingots and Al-rare earth master alloy ingots into the melting furnace, heat up and melt the charge, and when the charge is heated until it softens and collapses, ...

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Abstract

The invention discloses a special high-strength and high-toughness aluminum alloy material for an automobile and a manufacturing technology, and belongs to the technical field of aluminum alloy machining. The special high-strength and high-toughness aluminum alloy material comprises following raw materials including, by mass percent, 0.80%-1.20% of Si, 0.80%-1.0% of Mg, 0.50%-0.80% of Mn, 0%-0.20%of Cr, 0%-0.10% of Ti, 0%-0.10% of Cu, 0%-0.30% of Fe, 0.15%-0.25% of rare earth elements, 0%-0.20% of Zn, and the balance Al, wherein the rare earth elements are La and Ce, and the range of the massratio of La to Ce is 40:60-45:55. The corrosion property sensitivity index ISSRT is smaller than 6%, the ultimate strength sigma b is larger than or equal to 295 MPa, the yield strength sigma s is larger than or equal to 195 MPa, ductility delta is larger than or equal to 10%, the fatigue strength is larger than or equal to 110 MPa (R=0), and properties are greatly superior to the properties in the prior art.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy processing, and in particular relates to a special high-strength and tough aluminum alloy material for automobiles and a manufacturing process. Background technique [0002] Automobile body structural parts, anti-collision beams, thresholds, and side member skeletons are mostly made of 6082 aluminum alloy. However, an analysis of 6082 aluminum alloys on the market found that the ratio of Mg / Si in 6082 aluminum alloys on the market is too large, which leads to the corrosion resistance of the material. At the same time, Fe, Si, and Mn in aluminum alloys are easy to react with Al in the material to form refractory phases such as FeMnAlSi. These refractory phases are easy to become stress corrosion sources because they are difficult to deform. Therefore, the existing technology is used to manufacture automotive parts Aluminum alloys have the defects of high sensitivity to stress corrosion crack...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C21/08C22C1/03C22F1/043C22F1/047C22F1/05
CPCC22C1/026C22C1/03C22C21/02C22C21/08C22F1/043C22F1/047C22F1/05
Inventor 廖健
Owner CHENGDU SUNSHINE ALUMINUM