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2007 aluminum alloy rod processing process

A processing technology and technology of aluminum alloy, applied in the field of aluminum alloy processing, can solve the problems of reduced mechanical properties of rods, high crack tendency of extruded rods, rapid decline, etc., to improve comprehensive performance, avoid bright grains, reduce The effect of component segregation

Inactive Publication Date: 2015-11-04
CHINA ZHONGWANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing technology, coarse-grained rings are prone to appear in extruded rods. Since the mechanical properties and fatigue strength of coarse-grained rings are lower than those of normal fine-grained structures, coarse-grained rings should be strictly controlled during the production process.
Moreover, the rods produced by the existing technology are prone to serious defects such as bright crystal grains, cracks, severe surface segregation tumors, feathery crystals, coarse grains and coarse columnar crystals, which make the mechanical properties of the rods decline, and the crack tendency of the extruded rods High reliability, and cracks can easily lead to product scrapping or even safety accidents
In addition, after the aluminum alloy rod produced by the prior art is extruded, the temperature drops rapidly before quenching, which makes the performance of the aluminum alloy decrease after quenching.

Method used

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  • 2007 aluminum alloy rod processing process

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Experimental program
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Effect test

Embodiment 1

[0018] (1) Ingredients: The mass percentage of each element is: Si: 0.80%, Fe: 0.80%, Cu: 4.6%, Mn: 0.5%, Mg: 1.8%, Cr: 0.1%, Zn: 0.8%, Ti: 0.2% , Pb: 1.5%, Ni: 0.2%, Bi: 0.2%, Sn: 0.2%, other unavoidable impurities: 0.15%, Al balance; (2) Add each element into the melting furnace in turn, and the melting temperature is 715°C ;When molten aluminum appears in the furnace, carry out electromagnetic stirring; pass argon gas into the smelting furnace for refining and removing impurities, and the flow rate of argon gas is controlled at 55 scfh; carry out slag removal to obtain qualified aluminum liquid; inject the aluminum liquid into the holding furnace Carry out heat preservation, and the heat preservation time is 20min at a temperature of 740°C; add aluminum titanium boron refiner to refine; (3) Filtration: use a foam ceramic filter plate to filter the melt, and the filtration temperature is controlled at 725°C; (4 ) Casting: pour the melt obtained in step (3) into the mold at a...

Embodiment 2

[0020] (1) Ingredients: The mass percentage of each element is: Si: 0.50%, Fe: 0.60%, Cu: 3.3%, Mn: 1.0%, Mg: 0.4%, Cr: 0.02%, Zn: 0.7%, Ti: 0.1% , Pb: 0.8%, Ni: 0.1%, Bi: 0.15%, Sn: 0.17%, other unavoidable impurities: 0.1%, Al balance; (2) Add each element into the melting furnace in turn, and the melting temperature is 750°C ;When molten aluminum appears in the furnace, carry out electromagnetic stirring; feed argon gas into the smelting furnace for refining and impurity removal, and the flow rate of argon gas is controlled at 35scfh; slag is removed to obtain qualified aluminum liquid; the aluminum liquid is injected into the holding furnace for Heat preservation, the heat preservation time is 25min at a temperature of 705°C; add aluminum titanium boron refiner for refinement; (3) Filtration: filter with a foam ceramic filter plate to obtain a melt, and the filtration temperature is controlled at 695°C; (4 ) Casting: pour the melt obtained in step (3) into the mold at a ca...

Embodiment 3

[0022](1) Ingredients: The mass percentage of each element is: Si: 0.20%, Fe: 0.10%, Cu: 4%, Mn: 0.7%, Mg: 1.2%, Cr: 0.05%, Zn: 0.2%, Ti: 0.15% , Pb: 1.1%, Ni: 0.05%, Bi: 0.09%, Sn: 0.1%, other unavoidable impurities: 0.05%, Al balance; (2) Add each element into the melting furnace in turn, and the melting temperature is 725°C ;When molten aluminum appears in the furnace, carry out electromagnetic stirring to remove slag; pass argon gas into the smelting furnace for refining and removing impurities, and the flow rate of argon gas is controlled at 45scfh; carry out slag removal to obtain qualified aluminum liquid; inject the aluminum liquid into the insulation Carry out heat preservation in the furnace, and the heat preservation time is 30min at a temperature of 730°C; add aluminum titanium boron refiner for refinement; (3) Filtration: filter with a foam ceramic filter plate to obtain a melt, and the filtration temperature is controlled at 705°C ; (4) Casting: inject the melt o...

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Abstract

The invention discloses a 2007 aluminum alloy rod processing process. The 2007 aluminum alloy rod processing process includes the steps of dosing, smelting, stirring, detailing, drossing, heat preservation, detailing, filtering, casting, homogenizing treatment, extrusion, temperature compensation, on-line quenching, aging treatment, packaging and the like. The technological parameters needed during steps before on-line quenching are mainly controlled, so that cracks are effectively avoided, composition segregation and the depth of a coarse grain ring are reduced, and bright crystals and feather crystals are avoided; besides, a temperature compensation device is used for conducting temperature compensation on rods before quenching, and thus the overall performance of quenched rods can be improved. By means of the process, qualified 2007 round aluminum alloy rods can be extruded out successfully, produced aluminium alloy has a better mechanical property, and batch production is available.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy processing, and in particular relates to a 2007 aluminum alloy bar processing technology. Background technique [0002] The 2007 aluminum alloy belongs to the Al-Cu-Mg series of heat-treatable and strengthened aluminum alloys. As a structural high-strength aluminum alloy, it has a wide range of applications and is important for many load-bearing structures such as aircraft fuselages, wings, connectors, and rail trains. Material. In the prior art, coarse-grained rings are prone to appear in extruded rods. Since the mechanical properties and fatigue strength of the coarse-grained rings are lower than those of normal fine-grained structures, the coarse-grained rings should be strictly controlled during the production process. Moreover, the rods produced by the existing technology are prone to serious defects such as bright crystal grains, cracks, severe surface segregation tumors, feather...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/18C22C1/02C22F1/057
Inventor 迟壮赵芳顾维明邸静海
Owner CHINA ZHONGWANG
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