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Preparation method of ultra-strong high-toughness corrosion-resistant aluminum alloy extrusion material for aerospace

An aerospace and aluminum alloy technology, which is applied in the field of preparation of aluminum alloy extrusions for aerospace, can solve the problems that aluminum alloy extrusions cannot have high tensile strength, high toughness and corrosion resistance at the same time, and achieve anti-corrosion High tensile strength, excellent corrosion resistance, and the effect of improving fracture toughness

Pending Publication Date: 2022-03-01
NORTHEAST LIGHT ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention solves the technical problem that the aluminum alloy extruded material prepared by the existing method cannot have high tensile strength, high toughness and corrosion resistance at the same time, and provides a super-strong, high-tough, corrosion-resistant aluminum alloy extruded material for aerospace preparation method

Method used

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  • Preparation method of ultra-strong high-toughness corrosion-resistant aluminum alloy extrusion material for aerospace
  • Preparation method of ultra-strong high-toughness corrosion-resistant aluminum alloy extrusion material for aerospace
  • Preparation method of ultra-strong high-toughness corrosion-resistant aluminum alloy extrusion material for aerospace

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specific Embodiment approach 1

[0038] Specific Embodiment 1: In this embodiment, a method for preparing a super-strength, high-toughness, corrosion-resistant aluminum alloy extruded material for aerospace, the specific steps are as follows:

[0039] 1. According to the mass percentage of elements, Cu: 1.8%-2.2%, Mg: 1.8%-2.6%, Zn: 8.2%-9.2%, Zr: 0.10%-0.13%, Cr: 0.02%-0.04%, Ti : 0.01% to 0.04% and the balance is Al. Weigh aluminum ingots, cathode copper, primary magnesium ingots, zinc ingots, aluminum-zirconium alloy ingots, aluminum-chromium master alloy ingots and aluminum-titanium wires as raw materials, and then put the raw materials into Smelting in a smelting furnace to obtain molten aluminum alloy;

[0040] 2. Casting the molten aluminum alloy obtained in step 1 into an aluminum alloy round ingot by a semi-continuous casting process;

[0041] 3. Remove the scale of the aluminum alloy round ingot cast in step 2 at room temperature;

[0042] 4. Heat the aluminum alloy round ingot treated in step 3 a...

specific Embodiment approach 2

[0048] 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: 2.0%, Mg: 2.0%, Zn: 8.4%, Zr: 0.12%, Cr: 0.02 %, Ti: 0.02%, and the balance is Al. Weigh aluminum ingots, cathode copper, primary magnesium ingots, zinc ingots, aluminum-zirconium alloy ingots, aluminum-chromium master alloy ingots and aluminum-titanium wires as raw materials. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0049] Specific embodiment three: this embodiment is different from specific embodiment one or two in that: in step one, the smelting temperature is 720~760°C, and the smelting time is 5~9h. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method of an ultra-strong high-toughness corrosion-resistant aluminum alloy extrusion material for aerospace, and relates to the field of preparation methods of aluminum alloy extrusion materials for aerospace. The technical problem that an aluminum alloy extruded material prepared through an existing method cannot have high tensile strength, high toughness and corrosion resistance at the same time is solved. The method comprises the steps of raw material weighing, smelting, casting, homogenizing annealing, hot extrusion, solid solution quenching, straightening and aging manufacturing. The ultra-strong high-toughness corrosion-resistant aluminum alloy extruded material is produced through alloy component optimization, ingot casting quality control, a multi-stage homogenization treatment technology, an extrusion forming technology and a two-stage quenching and two-stage aging technology of strengthening and toughening heat treatment; and the residual stress of the extrusion material is effectively reduced and the fracture toughness of the extrusion material is improved by controlling the tension straightening quantity. The prepared aluminum alloy extruded material is applied to the field of aerospace.

Description

technical field [0001] The invention relates to the field of a method for preparing an aluminum alloy extruded material for aerospace. Background technique [0002] With the rapid development of my country's aerospace industry, more stringent requirements have been put forward for basic materials. While the cross-sectional size of the extruded material is required to be increased and the length of the cut length is lengthened, the performance of the extruded material is required to have a higher strength and toughness matching. Need to develop tensile strength ≥ 650MPa, yield strength ≥ 610MPa, compressive yield strength ≥ 620MPa, elongation ≥ 8%, fracture toughness ≥ 33KIC / MPa m 1 / 2 , Conductivity ≥ 37% IACS high comprehensive index cross-sectional area ≥ 50cm 2 , extruded materials with a length ≥ 12m, and form a stable production process. It is difficult to balance the tensile strength, toughness and corrosion resistance of existing aluminum alloy extruded materials. If...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/03C22F1/053B21C37/00
CPCC22C21/10C22C1/026C22C1/03C22F1/053C22F1/002B21C37/00
Inventor 吕丹吕新宇丛福官张祥斌吴沂哲刘洪雷王英君孙黎明鲁月韩明明王嘉君
Owner NORTHEAST LIGHT ALLOY CO LTD