Two-stage aging treatment technology for 7075 aluminum alloy

A dual-stage aging and treatment process technology, applied in the field of 7075 aluminum alloy treatment process, can solve problems such as unsatisfactory properties of the alloy

Inactive Publication Date: 2016-01-13
孟源
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of the alloy has a significant impact on the properties of the alloy, and when the current technology is used to prepare the alloy, the properties of the obtained alloy are not satisfactory

Method used

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  • Two-stage aging treatment technology for 7075 aluminum alloy
  • Two-stage aging treatment technology for 7075 aluminum alloy

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The semi-continuous ingot of 7075 alloy used in the experiment was provided by Northeast Light Alloy Co., Ltd., and the nominal composition of the alloy is shown in Table 1. The alloy is homogenized at 450°C / 24h, hot rolled into a 5mm thin plate at 420°C, and then subjected to two-stage solution treatment at 460°C / 2h+480°C / 1h.

[0022] The L9(34) orthogonal test scheme was designed for the four process parameters of the dual-stage aging process (pre-aging temperature θ1 and time t1, final aging temperature θ2 and time t2). Then, the range analysis is carried out on the experimental results to determine the best treatment process.

[0023]

[0024] The mechanical performance test at room temperature was completed on the Instron8301 multifunctional mechanical performance testing machine, and the relative conductivity test was carried out on the 7501 eddy current conductivity meter according to the regulations of GB / T12966. TEM was performed on a TecnaiG2 analytical el...

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Abstract

The invention discloses a two-stage aging treatment technology for 7075 aluminum alloy. The two-stage aging treatment technology for 7075 aluminum alloy is characterized by comprising the following steps that the 7075 aluminum alloy is kept at the temperature of 450 DEG C for 24 h to be homogenized, then the 7075 aluminum alloy is rolled to be a sheet of 5 mm thickness in a hot manner at the temperature of 420 DEG C, and the sheet is subjected to the two-stage solution treatment at the temperature of 460 DEG C for 2 h and the temperature of 480 DEG C for 1h, and finally subjected to the two-stage aging treatment at the temperature of 100-110 DEG C for 8-12 h and the temperature of 130-160 DEG C for 14-24 h. The optimal two-stage aging treatment technology is at the temperature of 105 DEG C for 8h and the temperature of 130 DEG C for 14h.

Description

technical field [0001] The invention relates to a treatment process of 7075 aluminum alloy, in particular to a double-stage aging treatment process capable of improving the performance of 7075 aluminum alloy. Background technique [0002] Aluminum alloy is a relatively young metal material, which only began to be used industrially in the early 20th century. During World War II, aluminum was mainly used in the manufacture of military aircraft. After the war, due to the sharp decrease in the demand for aluminum in the military industry, the aluminum industry began to develop civilian aluminum alloys, expanding its application scope from the aviation industry to the construction industry, container packaging industry, transportation industry, electric power and electronics industry, Various sectors of the national economy such as machinery manufacturing and petrochemicals are applied to people's daily lives. At present, aluminum is used in a large amount and in a wide range, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/053
Inventor 孟源
Owner 孟源
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