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A heat treatment method for the body of a 7075 aluminum alloy blind rivet

A heat treatment method and blind rivet technology, used in heat treatment furnaces, heat treatment equipment, furnaces, etc., can solve problems such as low strength, cracking, and non-heat treatment strengthening, and achieve the effects of improving comprehensive performance, increasing strength, and refining grains

Active Publication Date: 2020-02-07
WUXI ANSHIDA HARDWARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] 5056 is an Al-Mg series anti-rust aluminum alloy, which cannot be strengthened by heat treatment, has good plasticity in the annealed state, and has good corrosion resistance, but its strength is relatively low, so it is not suitable for high-strength rivets
However, when this material is used as a blind rivet body, there will be a partial cracking phenomenon when the rivet is pulled. Adjusting the heat treatment conditions will eliminate this phenomenon.

Method used

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  • A heat treatment method for the body of a 7075 aluminum alloy blind rivet
  • A heat treatment method for the body of a 7075 aluminum alloy blind rivet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A heat treatment method for a blind rivet body produced from 7075 aluminum alloy, comprising the following steps:

[0024] 1. The first solid solution treatment: heat the blind rivet body produced by 7075 aluminum alloy to 425°C in a heating furnace, keep it warm for 40 minutes, put it in cold water to cool, and obtain the nail body after the first solid solution product.

[0025] 2. The second solid solution treatment: heat the nail body product after the first solid solution in step 1 to 465°C in a heating furnace, and keep it warm for 25 minutes. (The furnace temperature must be preheated to the product required temperature) into cold water for cooling to obtain the nail body product after the second solid solution.

[0026] 3. Aging treatment: Heat the nail body product after the second solid solution in step 2 to 100°C in a heating furnace and keep it warm for 6 hours. After the time is up, take the product out of the heating furnace and air-cool it for the first ...

Embodiment 2

[0029] A heat treatment method for a blind rivet body produced from 7075 aluminum alloy, comprising the following steps:

[0030] 1. The first solid solution treatment: heat the blind rivet body produced by 7075 aluminum alloy to 430°C in a heating furnace, keep it warm for 40 minutes, put it in cold water to cool, and obtain the nail body after the first solid solution product.

[0031] 2. The second solid solution treatment: heat the nail body product after the first solid solution in step 1 to 470°C in a heating furnace, and keep it warm for 25 minutes. (The furnace temperature must be preheated to the product required temperature) into cold water for cooling to obtain the nail body product after the second solid solution.

[0032] 3. Aging treatment: Heat the nail body product after the second solid solution in step 2 to 105°C in a heating furnace and keep it warm for 6 hours. After the time is up, take the product out of the heating furnace and air-cool it for the first ...

Embodiment 3

[0035] A heat treatment method for a blind rivet body produced from 7075 aluminum alloy, comprising the following steps:

[0036] 1. The first solid solution treatment: heat the blind rivet body produced by 7075 aluminum alloy to 430°C in a heating furnace, keep it warm for 40 minutes, put it in cold water to cool, and obtain the nail body after the first solid solution product;

[0037] 2. The second solid solution treatment: heat the nail body product after the first solid solution in step 1 to 465°C in a heating furnace, and keep it warm for 25 minutes. (The furnace temperature must be preheated to the product required temperature) into cold water for cooling to obtain the nail body product after the second solid solution.

[0038] 3. Aging treatment: Heat the nail body product after the second solid solution in step 2 to 100°C in a heating furnace and keep it warm for 6 hours. After the time is up, take the product out of the heating furnace and air-cool it for the first ...

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Abstract

The invention relates to the technical field of heat treatment of aluminum alloy and in particular to a heat treatment method of a 7075 aluminum alloy self-plugging rivet body. The heat treatment method comprises the following steps of 1) first solid solution, heating a self-plugging rivet body produced by 7075 aluminum alloy in a heating furnace to a certain temperature, performing heat insulation, and putting the heated self-plugging rivet body in cold water for cooling to obtain a nail body product after first solid solution; 2) secondary solid solution, putting the nail body product afterfirst solid solution in the step 1 in the heating furnace for heating, then performing heat insulation, and putting the heated nail body in cold water for cooling to obtain a nail body product after secondary solid solution; 3) aging treatment: heating the nail body product after secondary solid solution in the step 2 in the heating furnace for heating, and then performing heat insulation, air cooling and first aging treatment; and 4) vibration aging: performing vibration aging on the product obtained in the step 3. The nail body produced by the heat treatment method is good in crystal grain size distribution and has refined crystal grain, so that the performance of the self-plugging rivet body produced by the 7075 aluminum alloy is improved.

Description

technical field [0001] The invention relates to a heat treatment method for a blind rivet body produced from an alloy, and belongs to the technical field of heat treatment of aluminum alloys, in particular to a heat treatment method for a 7075 aluminum alloy blind rivet body. Background technique [0002] Currently, 2017 and 5056 aluminum alloy materials are commonly used in aerospace for blind rivets. In recent years, the lightweight of automobiles has developed rapidly. The use of high-strength aluminum alloys to replace carbon steel is also one of the trends. [0003] 5056 is an Al-Mg antirust aluminum alloy that cannot be strengthened by heat treatment. It has good plasticity in the annealed state and good corrosion resistance, but its strength is relatively low, so it is not suitable for high-strength rivets. 2017 is a typical hard aluminum alloy in the aluminum-copper-magnesium system. Its composition is relatively reasonable, its comprehensive performance is good, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/053C21D9/00
CPCC21D9/0093C22F1/002C22F1/053
Inventor 缪建国邱晓东
Owner WUXI ANSHIDA HARDWARE
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