Process for avoiding coarse-grain rings of 6061 aluminum alloy bars and rods

A coarse-grained ring and aluminum alloy technology is applied in the process of avoiding the formation of coarse-grained rings of 6061 aluminum alloy bars, which can solve problems such as the decline of material physical properties and affect the normal use of materials, so as to reduce the risk of use and improve the bearing capacity. Effect

Inactive Publication Date: 2016-01-20
CHINA ZHONGWANG
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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a process to avoid the formation of coarse-grained rings in 6061 aluminum alloy rods, so as to solve the problems

Method used

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[0021] The process for avoiding the formation of coarse-grained rings in 6061 aluminum alloy rods in this embodiment, the specific process steps include alloy composition optimization, casting rod heating, extrusion process, online quenching, stretching straightening and artificial aging, after alloy composition optimization Chemical composition: Si: 0.60%-0.65%, Fe: 0.20%, Cu: 0.19%-0.24%, Mn: 0.05%-0.10%, Mg: 0.90%-0.95%, Cr: 0.25%-0.30%, Zn: 0.15%, Ti: 0.10%, others: 0.15% in total, Al: balance, the extrusion process adopts double-hole die extrusion, and the double-hole die reduces the extrusion ratio and reduces the aluminum ingot in the extrusion process The deformation amount is suppressed, and the formation of coarse grains is suppressed, and the production efficiency is improved at the same time.

[0022] As an improvement of this embodiment, in the casting rod heating process, the temperature of the casting rod is controlled within the range of 485-515°C, more prefera...

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Abstract

The invention discloses a process for avoiding coarse-grain rings of 6061 aluminum alloy bars and rods, and belongs to the technical field of aluminum alloy machining. The process includes the steps of alloy component optimization, cast bar heating, the extrusion process, online quenching, stretch flattening and artificial aging. Chemical components of optimized alloy components include 0.60-0.65% of Si, 0.20% of Fe, 0.19-0.24% of Cu, 0.05-0.10% of Mn, 0.90-0.95% of Mg, 0.25-0.30% of Cr, 0.15% of Zn, 0.10% of Ti, 0.15% of other substances, and the balance Al. Double-hole die extrusion is adopted for the extrusion process. By means of the process, extruded aluminum alloy products can be free of coarse-grain ring tissue defects, the mechanics, fatigue and other physical performance of materials are greatly improved, the bearing capacity and use safety of materials are improved, the service life of materials is prolonged, and use risks of materials are reduced.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy processing, and in particular relates to a process for avoiding the formation of coarse crystal rings in 6061 aluminum alloy rods. Background technique [0002] 6061 aluminum alloy belongs to Al-Mg-Si alloy, which has medium strength, good plasticity, excellent weldability and good corrosion resistance. In the extrusion of 6061 aluminum alloy rods, coarse crystal rings often appear, which is an important structural defect in aluminum alloy products, which will cause a significant decrease in the mechanical properties, fatigue strength and other physical properties of the material, affecting the normal use of the material. pose a risk of use. [0003] In view of the above problems, it is necessary to optimize and improve the existing 6061 aluminum alloy bar process, avoid the occurrence of structural defects such as coarse grain rings, and improve the mechanical properties, fatigue strength...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22F1/047B21C23/08
Inventor 王德营李鹏伟盖洪涛李洪林
Owner CHINA ZHONGWANG
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