Method for manufacturing aluminum alloy free forge piece for spaceflight

A manufacturing method and technology of aluminum alloy, which are applied in the field of manufacturing aluminum alloy free forgings, can solve the problem that aluminum alloy free forgings cannot have high strength and high corrosion resistance at the same time, and cannot meet the requirements of high strength, corrosion resistance and light weight of aluminum alloy materials. requirements, low density and other problems, to achieve the effect of excellent comprehensive mechanical properties, good surface quality and good forging performance.

Active Publication Date: 2015-11-25
哈尔滨东轻特种材料有限责任公司
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the current aluminum alloy free forgings cannot have high strength, high corrosion resistance and low density at the same time, so that the technical probl

Method used

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Example Embodiment

[0016] Specific embodiment 1: This embodiment is a method for manufacturing aluminum alloy free forgings for aerospace, which is specifically carried out according to the following steps:

[0017] 1. Preparation of aluminum alloy solution: Zn: 5.5% to 7.5%, Mg: 1.5% to 3.0%, Cu: 0.2% to 0.55%, Zr: 0.05% to 0.18%, Si: ≤0.10%, Fe: ≤0.15%, Mn: 0.2% to 0.45%, Cr: 0.005% to 0.1%, Ti: 0.01% to 0.05%, Sc: 0.15% to 0.45% and the balance of Al. Weigh the pure aluminum ingots, Pure copper ingots, pure magnesium ingots, pure zinc ingots, aluminum-scandium alloy ingots, aluminum-zirconium alloy ingots, aluminum-titanium alloy ingots and aluminum-titanium-boron wire are then smelted at a temperature of 740℃~760℃ for 8h~10h to obtain aluminum Alloy melt

[0018] 2. Preparation of round ingot: Put the aluminum alloy melt obtained in step 1 at a temperature of 700℃~750℃, a casting speed of 40mm / min~90mm / min, a cooling water strength of 0.03MPa~0.06MPa and a cooling water temperature Under the co...

Example Embodiment

[0025] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the purity of the pure aluminum ingot described in step 1 is greater than 99.7%. Others are the same as the first embodiment.

Example Embodiment

[0026] Specific embodiment three: The difference between this embodiment and specific embodiment one or two is: the mass fraction of titanium in the aluminum-titanium-boron wire in step one is 5%, the mass fraction of boron is 0.2%, and the rest is aluminum. Others are the same as the first or second embodiment.

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Abstract

The invention provides a method for manufacturing an aluminum alloy free forge piece for spaceflight and relates to a method for manufacturing an aluminum alloy free forge piece. The method aims to solve the technical problems that an existing aluminum alloy free forge piece cannot have high strength, high corrosion resistance and low density at the same time so that the requirements for high strength, corrosion resistance and light weight of aluminum alloy materials in the spaceflight field cannot be met. The method comprises the steps of 1, preparing an aluminum alloy solution; 2, manufacturing a round cast ingot; 3, carrying out dual-stage homogenizing annealing treatment; 4, manufacturing forge piece blank; 5, carrying out free forging; 6, performing solid-solution hardening treatment; 7, performing cold deformation treatment; and 8, performing two-stage aging treatment. The method has the advantages that by optimizing alloy components and adopting the optimized solid solution and aging processes after forging, the requirement for the overall performance of the aluminum alloy free forge piece is met; the manufactured aluminum alloy free forge piece is good in surface quality, the finished forge piece in industrial production is good in performance, and the overall mechanical property is good.

Description

technical field [0001] The invention relates to a method for manufacturing an aluminum alloy free forging. Background technique [0002] Existing traditional high-strength and high-toughness aluminum alloys, such as Al-Zn-Mg-Cu series 7050 alloys, have high strength and toughness but are not corrosion resistant; medium-strength weldable aluminum alloys, such as Al-Zn-Mg series 7005 and 7020 alloys, are resistant to corrosion. Corrosion but low strength can not solve the problem of high strength and high corrosion resistance and low density, and cannot meet the requirements of high strength, corrosion resistance and light weight of aluminum alloy materials in the aerospace field. [0003] At present, a certain aerospace product in my country needs a free forging, and the tensile strength of this aluminum alloy free forging is required to reach 460N / mm 2 , The specified non-proportional extension strength reaches 420N / mm 2 , The elongation after breaking reaches 8%, and the ...

Claims

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Application Information

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IPC IPC(8): C22F1/053C22C1/03C22C21/10
Inventor 刘平吕新宇刘洪雷王英君刘显东丛福官高新宇李海仙祁艳华
Owner 哈尔滨东轻特种材料有限责任公司
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