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High-specific-strength and high-specific-modulus aluminum alloy material, preparation method thereof and component machined by material

A technology of aluminum alloy materials and alloy materials, which is applied in the field of aluminum alloy materials and their preparation and processing, to achieve the effect of superior material performance, moderate price, and improved strength level

Active Publication Date: 2017-06-30
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, although aluminum alloy materials workers have carried out a lot of exploration and research work, they have not yet obtained the corresponding ideal materials, and it is difficult to meet the current and future lightweight development of modern manufacturing industries such as aerospace, transportation, and electronic devices. Strict requirements for alloys with high specific strength and high specific modulus

Method used

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  • High-specific-strength and high-specific-modulus aluminum alloy material, preparation method thereof and component machined by material
  • High-specific-strength and high-specific-modulus aluminum alloy material, preparation method thereof and component machined by material
  • High-specific-strength and high-specific-modulus aluminum alloy material, preparation method thereof and component machined by material

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Experimental program
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Effect test

Embodiment 1

[0036]The alloys were prepared on a laboratory scale, and the composition of the alloys is shown in Table 1. A small square ingot of 70×250×360mm was prepared through well-known alloy melting, degassing and inclusion removal, and simulated semi-continuous casting conditions. in a salt bath, followed by slow cooling in air. After peeling and sawing, a hot-rolled billet of 50×220×300mm is obtained. The hot-rolled billet is preheated at 480±10°C for 6 hours, and then rolled and deformed into a thin plate with a cross-section of 2.5mm×250mm. After these alloy sheets are cut to length, solution heat treatment is carried out at (470±5°C / 0.1h)+(500±5°C / 1h)+(535±5°C / 0.2h), and the heating rate between the two stages shall not exceed 60°C / h; water quenching immediately after the solution treatment, and stretching and bending treatment within 4 hours, the deformation is controlled between 1.0-2.0%; after the completion of the tension and leveling treatment, the strip is subjected to a ...

Embodiment 2

[0044] Aluminum alloy extruded rods were prepared in the laboratory, and the composition of the experimental alloy is shown in Table 3. Through well-known alloy melting, degassing, removing inclusions, and simulating semi-continuous casting conditions to prepare Φ200mm round ingots, the ingots are cast in a muffle furnace (420±10°C / 12h)+(500±5°C / 8h)+(530±5℃ / 12h) homogenization annealing treatment, air cooling, after peeling, milling and sawing, a Φ160mm billet is obtained. Preheat the billet at 445±10°C for 4 hours, and then extrude it into an extruded rod with a cross-section of Φ20mm on a 600-ton extruder. Subsequently, the rod is subjected to a single-stage solution heat treatment at a temperature of (550±5°C / 0.5h) in a salt bath, and immediately after water quenching, tensile deformation and straightening are performed, and the deformation is controlled within 1.25-2.50%; After the tension-leveling treatment is completed, the alloy extruded rods are subjected to natural ...

Embodiment 3

[0051] Alloy 6# of the present invention and comparative common alloys 11#, 16#, 17# were selected, and the alloy was prepared under pilot test conditions. Through alloy smelting, refining, degassing and impurity removal, and semi-continuous casting, a slab ingot with a thickness of 160mm is prepared. After homogenization heat treatment at 525±10°C / 18h, a rolled deformed billet with a thickness of 120mm is obtained after peeling and sawing. The billet is preheated at 480±10°C for 4-8 hours, the initial rolling temperature is 450°C, and finally a plate with a thickness of about 18mm is obtained after 7-13 passes, and the final rolling temperature is 375°C. Subsequently, a two-stage solution heat treatment of temperature (505±5°C / 1h) + (540±5°C / 0.5h) is carried out in a roller hearth quenching furnace, and 1.5-2.0% tensile deformation treatment is carried out immediately after spray quenching, The strip is subjected to natural aging treatment for 48h, and then the alloy plate is...

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Abstract

The invention discloses a high-specific-strength and high-specific-modulus aluminum alloy material, a preparation method thereof and a component machined by the material. The aluminum alloy is prepared from, by weight, 0.60-1.70% of Mg, 0.85-1.80% of Si, 0.80-2.40% of Li, no more than 0.50% of Mn, no more than 0.50% of Cu, no more than 0.50% of Zn, 0.50% of Fe, no more than 0.50% of Cr, no more than 0.25% of Ti, no more than 0.25% of Zr, no more than 0.05% of each of other elements, and the balance Al, and the total content of the other elements is no more than 0.15%. The preparation method comprises the steps that an alloy ingot is manufactured, the alloy ingot is subjected to homogenizing heat treatment, deformation machining is conducted on the alloy ingot after the homogenizing heat treatment to obtain the alloy material of a required specification, the alloy material is subjected to solution heat treatment and cooled to the room temperature quickly, and the alloy material is subjected to aging heat treatment to obtain good performance matching. The high-specific-strength and high-specific-modulus aluminum alloy material has excellent specific strength and specific modulus performance and is an ideal material of modern manufacturing structure lightweight components.

Description

technical field [0001] The invention relates to an aluminum alloy material with high specific strength and high specific modulus, a preparation method thereof and components processed from the material, and belongs to the technical field of aluminum alloy materials and their preparation and processing. Background technique [0002] As the second largest metal structure material next to steel, aluminum alloy has a specific gravity of only 1 / 3 of steel, and has light weight, wear resistance, corrosion resistance, high specific strength, good impact resistance, easy surface coloring, and easy processing , low manufacturing cost, good comprehensive performance, large amount of raw material resources, and more than 80% of aluminum can be recycled and reused. It has been widely used in the field of structural parts manufacturing for a long time and is indispensable in the development of various advanced equipment. One of the important pillar materials. With the rapid development ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C21/00C22F1/04C22F1/043
CPCC22C21/00C22C21/02C22F1/04C22F1/043
Inventor 李锡武熊柏青张永安李志辉刘红伟黄树晖闫宏伟闫丽珍
Owner GRIMAT ENG INST CO LTD
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