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Method for determining deformation heat treatment conditions for improving 2219 aluminium alloy performance

A technology of aluminum alloy and high performance, which is applied in the field of deformation heat treatment conditions, can solve the problems of low tensile properties and hardness values ​​of 2219 aluminum alloy, and limited application range, etc., and achieve the effect of solving insufficient database, improving strength and hardness, and expanding application range

Inactive Publication Date: 2014-02-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tensile properties and hardness values ​​of 2219 aluminum alloy treated under the above heat treatment process parameters are relatively low, so the scope of industrial application is limited to a certain extent

Method used

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  • Method for determining deformation heat treatment conditions for improving 2219 aluminium alloy performance
  • Method for determining deformation heat treatment conditions for improving 2219 aluminium alloy performance
  • Method for determining deformation heat treatment conditions for improving 2219 aluminium alloy performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The 2219 aluminum alloy sheet used in the experiment was provided by Tianjin Aerospace Long March Rocket Manufacturing Co., Ltd. The sheet is in an annealed state, and the thickness of the sheet is 7 mm. The hardness sample is a 10mm×10mm block with a thickness of 7mm. Tensile samples are processed and formulated according to GB / G 228-2002 "Metallic Materials Tensile Test Methods". Nine groups of samples were prepared, wherein each group of samples consisted of two hardness samples and two tensile samples, all the hardness samples were of the same size, and all the tensile test samples were of the same size. Each sample was solution treated at 535°C for 40 minutes, and then the sample was quenched in water at room temperature for 5 minutes. Aging treatment for 0h, 3h, 6h, 9h, 12h, 15h, 18h, 21h and 24h, and then air-cool the sample to room temperature. The hardness sample after air cooling was tested with Everone MH-6 durometer, and the tensile sample after air coolin...

Embodiment 2

[0022] Take ten groups of samples and take two hardness samples and two tensile samples for each group of samples, and the size of the samples is the same as that of the first embodiment. Ten groups of samples were solution treated at 535°C for 40 minutes, then quenched in water at room temperature for 5 minutes, and the quenching transfer time was less than 10 seconds, and finally ten groups of hardness and tensile samples were aged in an oven at 175°C for 0h , 1h, 2h, 3h, 6h, 9h, 12h, 15h, 18h, 21h, and then air-cool the sample to room temperature. The sample is tested for hardness and tensile properties, and the model of the testing instrument used is the same as that of Example 1. The curves of hardness, tensile strength, elongation and aging treatment time of 2219 aluminum alloy at the aging temperature of 175 ℃ were drawn respectively, as shown in image 3 , Figure 4 shown.

Embodiment 3

[0024]Take eight groups of samples and take two hardness samples and two tensile samples for each group of samples, and the size of the samples is the same as that of Example 1. The eight groups of samples were solution treated at 535°C for 40 minutes, then quenched in water at room temperature for 5 minutes, and the quenching transfer time was less than 10 seconds, and finally the eight groups of hardness and tensile samples were aged in an oven at 190°C for 0h , 20min, 40min, 2h, 4h, 6h, 8h, 10h, and then air-cool the sample to room temperature. The sample is tested for hardness and tensile properties, and the model of the testing instrument used is the same as that of Example 1. The curves of hardness, tensile strength, elongation and aging treatment time of 2219 aluminum alloy at the aging temperature of 190 ℃ were drawn respectively, as shown in Figure 5 , Figure 6 shown. Through the analysis of the strength, hardness and elongation of Examples 1~3, it is obtained th...

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Abstract

The invention discloses a method for determining deformation heat treatment conditions for improving 2219 aluminium alloy performance. The method comprises the followings: an aging temperature is determined by adopting T6 heat treatment, solid dissolving, quenching and aging treatment are performed on the sample of 2219 aluminium alloy, and the aging temperature of optimal deformation heat treatment, corresponding to intensity and hardness, is determined; T8 heat treatment is adopted for determining aging time, solid dissolving, quenching and rolling are performed on the sample of the 2219 aluminium alloy, aging treatment is performed at the temperature determined by T6 heat treatment, and the aging time of the optimal deformation heat treatment, corresponding to intensity and hardness, is determined. The method provided by the invention has the advantages as follows: the heat treatment method is simple, the optimal aging time and aging temperature of the T8 heat treatment of 2219 aluminium alloy are determined, the problem of insufficient databases is solved, and the application scope of the aluminium alloy in the industrial field can be expanded.

Description

technical field [0001] The invention relates to a method for determining deformation heat treatment conditions for improving the performance of 2219 aluminum alloy, and belongs to the technical field of aluminum alloy heat treatment. Background technique [0002] The material studied in the thesis is 2219 aluminum alloy, which is a material for rocket tanks. Since the liquid in the rocket storage tank is low-temperature fuel such as liquid hydrogen and liquid oxygen, the selection of storage tank material is very important. The material should have good ultra-low temperature mechanical properties, good welding performance and fracture toughness. 2014 and 2219 aluminum alloys are widely used in liquid hydrogen and liquid oxygen rocket storage tank materials in the United States. At present, most of the rocket storage tanks in my country are made of 2A14 aluminum alloy. This material has high strength, good thermal strength, good machinability and electrical resistivity, but ...

Claims

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Application Information

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IPC IPC(8): C22F1/057
Inventor 师春生张智锋赵乃勤刘燕何春年刘恩佐李家俊
Owner TIANJIN UNIV
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