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Al-Mg-Si-Cu-Zr-Er alloy having excellent stamping formation performance and preparation method thereof

A technology of al-mg-si-cu-zr-er and stamping, which is applied in the field of Al-Mg-Si-Cu-Zr-Er alloy and its preparation, can solve problems such as complex action mechanism and achieve low production cost High, good stamping performance and mechanical properties at room temperature, the effect of simple preparation process and heat treatment

Active Publication Date: 2018-06-29
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there have been a lot of reports on the research of adding Zr and Er elements alone to Al-Mg-Si-Cu, and the complex microalloying is more complicated due to the interaction mechanism between the elements, so the existing small amount of research is only qualitative research. However, systematic research on the relationship between quantitative elements and the properties of materials has rarely been reported.

Method used

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  • Al-Mg-Si-Cu-Zr-Er alloy having excellent stamping formation performance and preparation method thereof
  • Al-Mg-Si-Cu-Zr-Er alloy having excellent stamping formation performance and preparation method thereof
  • Al-Mg-Si-Cu-Zr-Er alloy having excellent stamping formation performance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment prepares Al-Mg-Si-Cu-0.15Zr alloy material according to the following steps:

[0033] Step 1: Preparation of Alloy Ingot

[0034] a. Ingredients: Ingredients: According to the mass percentage of 97.65% Al, 1.1% Mg, 0.65% Si, 0.3% Cu, 0.15% Mn and 0.15% Zr, weigh metal Al, Al-50% Mg master alloy, Al-20 %Si master alloy, Al-50%Cu master alloy, Al-20%Mn master alloy, Al-10%Zr master alloy are used for batching, and the total mass of batching is 1200g;

[0035] 1b. Melting: first set the furnace temperature to 300°C, add metal Al into the crucible after the crucible is dry, raise the furnace temperature to 800°C, keep the temperature until Al melts, then lower the temperature to 780°C, stir and hold for 10 minutes;

[0036]1c. Add Al-Si master alloy, Al-Cu master alloy, Al-Mn master alloy, Al-Zr master alloy and Al-Er master alloy. After melting, stir slightly and continue to keep warm for 10 minutes to obtain a melt;

[0037] 1d. Refining: adjust the furn...

Embodiment 2

[0060] This embodiment prepares the Al-Mg-Si-Cu-0.3Er alloy material according to the same steps as in Example 1, the difference is that in step 1a, 97.5% Al, 1.1% Mg, 0.65% Si, 0.3% Cu, 0.15% The mass percentage of Mn and 0.3% Er, weighing the metal Al, Al-50%Mg master alloy, Al-20%Si master alloy, Al-50%Cu master alloy, Al-20%Mn master alloy and Al-9.92% Er intermediate alloy is carried out batching, and batching total mass is 1200g;

[0061] Carry out room temperature tensile test to Al-Mg-Si-Cu-0.3Er alloy material by the same method of embodiment 1, the obtained mechanical performance index: tensile strength σ b 249Mpa, yield strength σ 0.2 It is 141Mpa, the elongation δ is 23.5%, the hardening index n is 0.23, and the thickness anisotropy coefficient r value is shown in Table 1 for details.

[0062] Carry out room temperature drawing test to Al-Mg-Si-Cu-0.3Er alloy material by the same method of embodiment 1, the maximum drawing diameter of gained plate is D max is 96...

Embodiment 3

[0064] This example prepares the Al-Mg-Si-Cu-0.15Zr-0.3Er alloy material according to the same steps as Example 1, the difference is that in step 1a, 97.35% Al, 1.1% Mg, 0.65% Si, 0.3% Cu , 0.15%Mn, 0.15Zr and 0.3%Er by weight, weigh metal Al, Al-50%Mg master alloy, Al-20%Si master alloy, Al-50%Cu master alloy, Al-20%Mn master alloy Alloy, Al-10%Zr master alloy and Al-9.92%Er master alloy are batched, and the total weight of the batch is 1200g.

[0065] Carry out the tensile test at room temperature to Al-Mg-Si-Cu-0.15Zr-0.3Er alloy material by the same method of embodiment 1, the obtained mechanical property index: tensile strength σ b 260Mpa, yield strength σ 0.2 It is 136Mpa, the elongation δ is 25%, the hardening index n is 0.24, and the thickness anisotropy coefficient r value is shown in Table 1 for details.

[0066] Carry out room temperature drawing test to Al-Mg-Si-Cu-0.15Zr-0.3Er alloy material by the same method of embodiment 1, the maximum drawing diameter of gai...

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Abstract

The invention discloses an Al-Mg-Si-Cu-Zr-Er alloy having excellent stamping formation performance. The Al-Mg-Si-Cu-Zr-Er alloy having the excellent stamping formation performance comprises, by mass,0.14%-0.18% of transitional element Zr and 0.28%-0.32% of rare earth element Er. The Zr element and the Er element are added to an Al-Mg-Si-Cu alloy for compounding, the contents of other alloy elements are reasonably designed, a reasonable smelting technology and a rapid solidification technology are adopted, repeated rolling and appropriate heat treatment are conducted, and then the Al-Mg-Si-Cu-Zr-Er alloy material uniform in microscopic structure and fine in crystal particle is prepared. The obtained alloy material has good formation performance, the ductility delta of the alloy material islarger than or equal to 24%, and the limiting drawing coefficient of the alloy material is smaller than or equal to 0.53. The technology process is simple, the cost is low, and the comprehensive performance is excellent.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metals, and in particular relates to an Al-Mg-Si-Cu-Zr-Er alloy and a preparation method thereof. Background technique [0002] At present, the research and application of aluminum alloy in the automobile industry has attracted much attention. It has significant advantages in energy saving, emission reduction, safety, environmental protection, and comfort. As the largest part of an automobile, the weight of the body is about 30% of the total weight of the automobile. , which is of great significance to the lightweight of the vehicle. Al-Mg-Si-Cu series alloy, as a heat-treatable and strengthened aluminum alloy, has excellent comprehensive properties. Its biggest advantage is that the yield strength is low in the T4 supply state (solution quenching + natural aging), and it is suitable for stamping. After coating and baking, its strength will increase and its anti-sag ability will be enhanced, s...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C1/03C22C1/06C22F1/047
CPCC22C1/026C22C1/03C22C1/06C22C21/08C22F1/047
Inventor 陈文琳雷远李灿马勇
Owner HEFEI UNIV OF TECH
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