6 series low alloy composition with high long-term thermal stability and preparation method thereof

A thermally stable, low-alloy technology, which is applied in the field of low-alloy composition and its preparation to improve the long-term thermal stability of 6-series aluminum alloys, can solve the problems of restricting the export of high-end auto parts and mechanical properties, and achieve reduction Effects of parking effect, slow diffusion growth rate, and low nucleation temperature

Active Publication Date: 2020-12-08
CHINA ZHONGWANG
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Problems solved by technology

[0005] In view of this, in order to solve the problem that the mechanical properties of aluminum alloy profiles prepared with low-alloy components of the existing 6 series cannot meet the requirements of foreign automobile manufacturers and restrict the export of high-end auto parts, the present invention provides a high-long-term thermal stability 6 series low alloy composition and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing a 6-series low-alloy composition aluminum profile, comprising the steps of:

[0029] A. Calculate the amount of each aluminum alloy raw material and prepare the aluminum alloy raw material according to the ratio. The mass percentage ratio of each element of the 6 series aluminum alloy raw material is as follows:

[0030] element Si Fe Cu mn Mg Zr Cr Ti Impurities Al content 0.45 0.10 0.04 0.03 0.50 0.04 0.03 0.07 0.02 margin

[0031] Add the prepared aluminum alloy raw materials into the melting furnace for refining, on-line degassing, and on-line filtration, and then smelt them into liquid aluminum alloys, and melt and cast the liquid aluminum alloys into aluminum alloy casting rods. The ingredients of aluminum alloy raw materials follow the following process: Throw it into the smelting furnace for smelting, and use flux to refine and cover it. After feeding, stir when aluminum water appears in the fu...

Embodiment 2

[0042] The difference between Example 2 and Example 1 is that the mass percentage ratio of each element of the 6-series aluminum alloy raw material in step A is as follows:

[0043] element Si Fe Cu mn Mg Zr Cr Ti Impurities Al content 0.49 0.09 0.05 0.02 0.52 0.04 0.03 0.08 0.02 margin

[0044] Example 2 The mechanical property data of the aluminum alloy profiles after artificial aging and heat treatment at 150°C for different times are shown in Table 2.

[0045] Table 2

[0046] Heat treatment 0h Heat treatment 240h Heat treatment 480h Heat treatment 720h Heat treatment 1000h Yield strength (MPa) 225 220 213 208 209 Tensile strength (MPa) 240 234 230 228 224 Elongation at break (%) 14.0 14.0 13.5 13.5 14.0

[0047] It can be seen from Table 2 that after artificial aging, the aluminum alloy profile with low alloy composition is heat-treated at 150°C for 1000 hours, the yield s...

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Abstract

The invention belongs to the technical field of aluminum alloy production process, and relates to a 6-series low alloy component with high long-term thermal stability and a preparation method thereof.The 6-series low alloy component is prepared from the following element components in percentage by weight: 0.44-0.50% of Si, less than or equal to 0.15% of Fe, 0.01-0.05% of Cu, less than or equalto 0.03% of Mn, 0.48-0.53% of Mg, 0.04-0.05% of Zr, less than or equal to 0.03% of Cr, 0.03-0.08% of Ti, less than or equal to 0.03% of single impurity and total impurity content is less than or equalto 0.10%, and the balance of Al, wherein Mg / Si is controlled within 0.95-1.15. The aluminum profile obtained by adopting the production process has huge advantages in the aspect of temperature stability and can meet the requirement of the current market on the long-term thermal stability of alloy materials and lays a foundation for developing high-end automobile parts in the future.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy production technology, and relates to a 6-series low-alloy component with high long-term thermal stability and a preparation method thereof, in particular to a low-alloy component that improves the long-term thermal stability of a 6-series aluminum alloy and its preparation method. Background technique [0002] Aluminum and aluminum alloys have been widely used in the field of modern transportation as lightweight materials. Compared with traditional steel, aluminum alloys have high specific strength, light weight, and excellent corrosion resistance. Therefore, aluminum alloys are widely used in the fields of automobiles and aviation. 6-series aluminum alloy is low in price and is the most widely used aluminum alloy. Its typical heat treatment method is T6 treatment: deformation after casting and homogenization treatment, then solution treatment and quenching, and finally at a certain temper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C21/08C22F1/043C22F1/047C22F1/05
CPCC22C21/02C22C21/08C22F1/002C22F1/043C22F1/047C22F1/05
Inventor 武维煜王睿王义斌高爽黄永哲王爽崔家铭吴明杨
Owner CHINA ZHONGWANG
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