Manufacturing method of high-strength aluminum alloy rivet wire for spaceflight

A manufacturing method and aluminum alloy technology, which is applied in the field of manufacturing high-strength aluminum alloy rivet wires for aerospace, can solve the problems that the strength and shear strength of rivet wires cannot meet the application requirements of aviation products, and improve the effect of heat treatment and guarantee Effect of elongation and processability improvement

Active Publication Date: 2017-05-31
NORTHEAST LIGHT ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the strength and shear strength of the aluminum alloy rivet wire prepared by the existing process cannot meet the application requirements of aviation products when the elongation after breaking is satisfied, the present invention proposes a high-strength aerospace Aluminum alloy rivet wire manufacturing method

Method used

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specific Embodiment approach 1

[0020] In this embodiment, the method for manufacturing high-strength aluminum alloy rivet wire for aerospace is carried out according to the following steps:

[0021] 1. According to the mass percentage of each element, Zn: 6.5% ~ 7.2%, Mg: 2.8% ~ 3.2%, Cu: 1.0% ~ 1.2%, Zr: 0.08% ~ 0.18%, V: 0.05% ~ 0.15%, Mn: ≤0.10%, Si: ≤0.08%, Fe: ≤0.10%, Cr: ≤0.10%, and the rest of Al weighs pure zinc ingot, pure magnesium ingot, electrolytic copper, Al-Zr master alloy, Al-V master alloy and high-purity aluminum ingots as raw materials, then put the raw materials into the melting furnace, and smelt at 720°C-740°C for 6-8 hours to obtain aluminum alloy melt;

[0022] 2. Import the molten aluminum alloy obtained in step 1 into a static furnace, refine it for 5min to 15min at a temperature of 720°C to 740°C and pass a mixed gas of argon and chlorine for 5min to 15min, and then heat it at a temperature of 720°C to 730°C and pass it through Refining under the condition of entering argon for 1...

specific Embodiment approach 2

[0033] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, according to the mass percentage of elements, Zn: 6.8%, Mg: 3.0%, Cu: 1.1%, Zr: 0.15%, V: 0.08, Mn: ≤0.10%, Si: ≤0.08%, Fe: ≤0.10%, Cr: ≤0.10%, and the balance of Al weighs pure zinc ingot, pure magnesium ingot, electrolytic copper, Al-Zr master alloy, Al-V Master alloys and high-purity aluminum ingots are used as raw materials. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0034] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the mixed gas of argon and chlorine in step two contains 90% to 94% of argon and 6% to 10% of chlorine by volume, and the argon and chlorine H in the mixed gas 2 , O 2 , N 2 or H 2 The volume concentration of O is not more than 2ppm, CH 4 The volume concentration is not more than 1ppm. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a manufacturing method of a high-strength aluminum alloy rivet wire for spaceflight, and relates to a manufacturing method of a novel aluminum alloy rivet wire. The imperious demands of China space industry for high-strength riveting materials, particularly light aluminum alloy rivet materials are met, the material strength is ensured, and meanwhile rivets are required to have certain plasticity. The manufacturing method comprises the first step of alloy solution preparation, the second step of molten aluminum refining treatment, the third step of casting of an alloy cast bar, the fourth step of homogenizing annealing, the fifth step of cast bar sawing, the sixth step of hot extrusion forming, the seventh step of intermediate annealing, the eighth step of cold drawing, the ninth step of solution treatment and the tenth step of aging treatment. According to the aluminum alloy rivet wire manufactured through the manufacturing method, the tensile strength is not smaller than 580 Mpa, the stipulated non-proportional extension strength is not smaller than 500 Mpa, the percentage elongation after fracture is not smaller than 6%, the shear strength is not smaller than 320 Mpa, and application requirements of spaceflight products are met. The manufacturing method can be used for machining and manufacturing spaceflight aluminum alloy rivets.

Description

technical field [0001] The invention relates to a method for manufacturing an aluminum alloy rivet wire, in particular to a method for manufacturing a high-strength aluminum alloy rivet wire for aerospace. Background technique [0002] With the development of my country's aerospace industry, there is an urgent need for high-strength riveting materials, especially lightweight aluminum alloy rivet materials. While ensuring the strength of the material, the rivets are still required to have a certain degree of plasticity. According to my country's aerospace design requirements , the tensile strength of the rivet wire is required to reach 580Mpa, the specified non-proportional elongation strength reaches 500Mpa, the elongation after breaking reaches 6%, and the shear strength reaches 320Mpa. However, the strength and shear strength of the rivets prepared from various aluminum alloy rivet wires in the existing production process can not meet the application requirements of aviatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/03C22C1/06C22F1/053
CPCC22C1/026C22C1/03C22C1/06C22C21/10C22F1/053
Inventor 高新宇王国军王金花孙婧彧王志超谭树栋刘世雷高宝亭杨晓禹赵大明
Owner NORTHEAST LIGHT ALLOY CO LTD
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