Manufacturing method of aluminum alloy rivet wire for aerospace

A technology of aerospace and manufacturing methods, which is applied in the field of manufacturing aluminum alloy rivet wires, can solve the problems of low elongation after fracture and low shear strength of tensile strength, achieve comprehensive mechanical properties improvement, good physical size and surface quality, Good molding performance

Inactive Publication Date: 2016-01-27
NORTHEAST LIGHT ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low tensile strength, specified non-proportional elongation strength, elongati

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0017] Specific embodiment one: the manufacturing method of a kind of aerospace aluminum alloy rivet wire of the present embodiment is to carry out according to the following steps:

[0018] 1. According to the mass percentage of elements Cu: 3.5%~4.5%, Mg: 0.4%~1.0%, Mn: 0.4%~1.0%, Si: 0.20%~0.8%, Zr: 0.2%~0.10%, Ti: 0.5 %~0.15%, Fe: ≤0.7%, Zn: ≤0.25%, Cr: ≤0.10%, and the balance Al, weigh pure aluminum ingots, pure copper ingots, pure magnesium ingots, pure zinc ingots, aluminum-manganese alloy ingots, Aluminum-silicon alloy ingots, aluminum-zirconium alloy ingots and aluminum-titanium-boron grain refiners are used as raw materials, and the raw materials are added to the melting furnace, and smelted at a temperature of 720 ° C to 760 ° C for 3 to 4 hours to obtain aluminum alloy smelting liquid;

[0019] 2. Put the aluminum alloy melt prepared in step 1 at a temperature of 715°C to 730°C, a casting speed of 90mm / min to 95mm / min, a cooling water strength of 0.05MPa to 0.10MP...

specific Embodiment approach 2

[0029] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, according to the mass percentage of elements, Cu: 3.6% to 4.4%, Mg: 0.5% to 0.9%, Mn: 0.5% to 0.9%, Si: 0.30%~0.7%, Zr: 0.3%~0.9%, Ti: 0.8%~0.13%, Fe: ≤0.6%, Zn: ≤0.20%, Cr: ≤0.09% and the balance of Al are weighed Pure aluminum ingots, pure copper ingots, pure magnesium ingots, pure zinc ingots, aluminum-manganese alloy ingots, aluminum-silicon alloy ingots, aluminum-zirconium alloy ingots and aluminum-titanium-boron grain refiners are used as raw materials. Other steps and parameters are the same as in the second embodiment.

specific Embodiment approach 3

[0030] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that in step 1, the mass percentages of elements are Cu: 4.0%, Mg: 0.7%, Mn: 0.7%, Si: 0.5%, Zr: 0.7%, Ti: 0.10%, Fe: ≤ 0.5%, Zn: ≤ 0.15%, Cr: ≤ 0.08% and the balance of Al Weighing pure aluminum ingots, pure copper ingots, pure magnesium ingots, pure zinc ingots, Al-Mn alloy ingots, Al-Si alloy ingots, Al-Zr alloy ingots and Al-Ti-B grain refiners are used as raw materials. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a manufacturing method of an aluminum alloy rivet wire, in particular to a manufacturing method of an aluminum alloy rivet wire for aerospace, and aims at solving the problems that an existing rivet wire is low in tensile strength, regulated non-proportional extension strength, post-fracture percentage elongation and anti-shearing strength. The method comprises the steps that firstly, an aluminum alloy solution is prepared; secondly, an alloy cast bar is cast; thirdly, the cast bar is cut off according to the fixed size; fourthly, the cast bar is turned for descaling; fifthly, homogenizing annealing is carried out on an aluminum alloy ingot; sixthly, the ingot is heated; seventhly, the aluminum alloy wire is formed through extrusion; eighthly, the middle of the wire is annealed; and ninthly, cold-drawing deformation is carried out, and the aluminum alloy rivet wire is manufactured. The tensile strength of an H13 state wire rod of the obtained aluminum alloy rivet wire is not smaller than 205 MPa; the tensile strength of a T4 state wire rod of the aluminum alloy rivet wire is not smaller than 380 MPa, the regulated non-proportional extension strength of the T4 state wire rod of the aluminum alloy rivet wire is not smaller than 220 MPa, the post-fracture percentage elongation of the T4 state wire rod of the aluminum alloy rivet wire is not smaller than 10%, and the anti-shearing strength of the T4 state wire rod of the aluminum alloy rivet wire is not smaller than 225 MPa. The method is applied to machining and manufacturing the aluminum alloy rivet wire for aerospace.

Description

technical field [0001] The invention relates to a manufacturing method of an aluminum alloy rivet wire. Background technique [0002] Aluminum alloy materials have a wide range of applications, and can be used in various fields such as construction, electronic appliances, transportation, aviation, and aerospace in industry. Aluminum alloy rivets for aerospace are manufactured by processing aluminum alloy rivet wires, and the deformation or interference of aluminum alloy rivets is used. Aviation components that connect riveted parts. [0003] At present, a certain aviation product in my country needs a special rivet, which requires the tensile strength of the aluminum alloy H13 state wire to reach 205MPa; the tensile strength of the T4 state wire reaches 380MPa, and the specified non-proportional elongation strength reaches 220MPa. The rate reaches 10%, and the shear strength reaches 225MPa. However, various aluminum alloy rivet wire rods produced by the existing technology ...

Claims

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Application Information

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IPC IPC(8): C22C21/18C22C21/16C22C1/03C22F1/057
Inventor 高新宇吕新宇王国军王强张燕飞孙婧彧陈雷高宝亭
Owner NORTHEAST LIGHT ALLOY CO LTD
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