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Preparation method of aluminum alloy wire for manufacturing ultrahigh-strength rivets

A technology of aluminum alloy wire and aluminum alloy, which is applied in the field of preparation of aluminum alloy wire for rivet manufacturing, and can solve the problems of low tensile strength, elongation after breaking, low shear strength, etc.

Pending Publication Date: 2021-05-18
NORTHEAST LIGHT ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of low tensile strength, elongation after fracture and low shear strength of existing aluminum alloy wires, and provides a method for preparing aluminum alloy wires for manufacturing ultra-high-strength rivets

Method used

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specific Embodiment approach 1

[0016] Specific Embodiment 1: In this embodiment, the method for preparing aluminum alloy wire for manufacturing ultra-high-strength rivets is implemented according to the following steps:

[0017] 1. Melting of aluminum alloy ingots: zinc: 5.8% to 6.7%, magnesium: 2.0% to 2.5%, copper: 2.0% to 2.6%, zirconium: 0.08% to 0.14%, silicon: ≤0.10% by mass percentage , iron: ≤0.12%, manganese: ≤0.08%, chromium: ≤0.03%, titanium: ≤0.05%, and the balance of aluminum weighs aluminum ingots, pure magnesium ingots, pure zinc ingots, electrolytic copper, AlCu40 master alloy, AlZr3 The master alloy and aluminum titanium boron wire grain refiner are used as raw materials, and the weighed raw materials are added to the melting furnace, the melting temperature is controlled at 710°C to 770°C, the melting heating time is 2.5 to 5.5 hours, and argon is used before casting Refining with gas for not less than 10 minutes to obtain molten aluminum before aluminum alloy casting;

[0018] 2. Casting...

specific Embodiment approach 2

[0026] Specific embodiment two: the difference between this embodiment and specific embodiment one is that in step one, zinc: 6.0% to 6.4%, magnesium: 2.2% to 2.5%, copper: 2.0% to 2.3%, zirconium: 0.10 %~0.12%, silicon: ≤0.10%, iron: ≤0.12%, manganese: ≤0.08%, chromium: ≤0.03%, titanium: ≤0.05%, and the balance of aluminum weighed aluminum ingots, pure magnesium ingots, pure zinc Ingot, electrolytic copper, AlCu40 master alloy, AlZr3 master alloy and aluminum titanium boron wire grain refiner are used as raw materials.

specific Embodiment approach 3

[0027] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that in step 1, the smelting temperature is controlled to be 730° C. to 750° C., and the smelting heating time is 3 to 5 hours.

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Abstract

The invention relates to a preparation method of an aluminum alloy wire for manufacturing ultrahigh-strength rivets, particularly relates to a preparation method of an aluminum alloy wire for manufacturing ultrahigh-strength rivets, and aims to solve the problems of low tensile strength, elongation after fracture and shearing resistance of the existing aluminum alloy wire. The preparation method comprises the following steps: step one, smelting aluminum alloy ingots; step two, casting the aluminum alloy cast ingots; step three, sawing the aluminum alloy cast ingots; step four, carrying out homogenization annealing; step five, removing oxidation films on the surfaces of short cast ingots; step six, preheating the aluminum alloy and extruding blank cast ingots; step seven, extruding under the conditions that the extrusion temperature is 390-430 DEG C, and the extrusion speed is 30-60mm / min; step eight, carrying out intermediate annealing of a wire blank; and step nine, carrying out cold drawing through a drawing and reeling die under the condition that the deformation rate is 25-30%. The aluminum alloy wire prepared by the method is in the H13 state; the high-strength performance requirement is met; and the actual size and the surface quality of the wire obtained by the method are excellent.

Description

technical field [0001] The invention relates to a preparation method of an aluminum alloy wire for rivet manufacture. Background technique [0002] Because of its corrosion resistance, low density, high specific strength, high specific stiffness, high fracture toughness and fatigue strength, aluminum alloy plays a positive role in increasing the stability of structures and reducing the overall weight of structural materials. Therefore, aluminum alloys are widely used in key national defense military and civilian fields such as aviation, aerospace, armor, tanks, ships, rail transit, power electronics, automobiles, and construction. [0003] At present, an ultra-high-strength aluminum alloy rivet needs to be used in the connection of product structural parts in the aviation field in my country. The performance requirement of the aluminum alloy wire used for the preparation of the rivet is that the tensile strength in the H13 state is not less than 235 MPa. After solution que...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22C1/03C22F1/053B21C1/00
CPCB21C1/00C22C1/026C22C1/03C22C21/10C22F1/053
Inventor 胡天龙高新宇丛福官韩明明任伟才王春晖韩啸高宝亭
Owner NORTHEAST LIGHT ALLOY CO LTD
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