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A kind of production technology of 3 series aluminum alloy pipe

A production process and technology of aluminum alloy, applied in the field of aluminum alloy, can solve the problems such as failure to meet the requirements of no corrosion points and unsatisfactory mechanical properties, and achieve good production and application value, improve corrosion resistance, and reduce intragranular segregation.

Active Publication Date: 2019-12-17
CHINA ZHONGWANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention solves the problem that the mechanical properties of the 3A21 annealed aluminum alloy pipes in the prior art cannot meet the standard requirements of GB / T 6892-2015, and cannot be maintained for 24 hours without corrosion under the condition of an acidic solution with a pH value of 4.0. To meet the requirements of the point, provide a production process for 3-series aluminum alloy pipes

Method used

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  • A kind of production technology of 3 series aluminum alloy pipe
  • A kind of production technology of 3 series aluminum alloy pipe
  • A kind of production technology of 3 series aluminum alloy pipe

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0031] A production process of 3 series aluminum alloy pipes, comprising the following steps:

[0032] A. Melting and casting: Prepare 3-series aluminum alloy raw materials according to the following weight ratios: Si: 0.05%, Fe: 0.45%, Cu: 0.05%, Mn: 1.20%, Mg: 0.05%, Cr: 0.03%, Zn: 0.10 %, Ti: 0.03%, single impurity ≤ 0.05%, total impurity ≤ 0.15%, the balance Al, put the prepared aluminum alloy raw materials into the smelting furnace and mix them evenly to melt into liquid aluminum alloy, and melt and cast the liquid aluminum alloy into aluminum Alloy cast rod;

[0033] B. Homogenization: heat the aluminum alloy casting rod obtained by melting and casting to 580°C, keep it warm for 10 hours, and cool to normal temperature to obtain a homogeneous aluminum alloy casting rod, wherein the length of the homogenized aluminum alloy casting rod is 350mm;

[0034] C. Extrusion: Send the homogenized aluminum alloy cast rod into the extrusion cylinder of the extrusion machine for ext...

Embodiment 2

[0038] The difference between Example 2 and Example 1 is that in Step E, the quenched 3-series aluminum alloy pipe is annealed at 430° C. for 1.5 h to obtain the 3-series annealed aluminum alloy pipe.

Embodiment 3

[0040] The difference between Example 3 and Example 1 is that in step E, the quenched 3-series aluminum alloy pipe is annealed at 460° C. for 1.5 h to obtain the 3-series annealed aluminum alloy pipe.

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Abstract

The invention belongs to the technical field of aluminum alloys, and relates to a manufacturing technique for a three-series aluminum alloy tubular product. Three-series aluminum alloy raw materials include not larger than 0.15% of Si, 0.45%-0.60% of Fe, 0.05% of Cu, 1.20%-1.40% of Mn, not larger than 0.05% of Mg, not larger than 0.03% of Cr, not larger than 0.10% of Zn, not larger than 0.03% of Ti, not larger than 0.05% of single impurities, not larger than 0.15% of total impurities and the balance Al. according to the annealing treatment technology, the three-series aluminum alloy tubular product obtained after quenching is subject to annealing treatment for 1-2 h at the temperature ranging from 400 DEG C to 460 DEG C, the mechanical property of the prepared three-series aluminum alloy tubular product meets the normal standard requirement in GB / T 6892-2015, namely, the strength of extension is smaller than or equal to 185 Mpa, the elongation requirement is larger than or equal to 16%, by means of the technique, the elongation of the tubular product can reach more than 40% and is far higher than 16% in the standard requirement, meanwhile, the tubular product can meet the 24-hour corrosion-point-free requirement under the condition of an acid solution with the PH being 4.0.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys and relates to a production process of 3 series aluminum alloy pipes. Background technique [0002] Aluminum alloy 3A21 mainly uses manganese as the alloy element. It belongs to heat treatment non-strengthenable alloy with good plasticity and weldability. It is a medium-strength aluminum alloy with good corrosion resistance. It is widely used in pipes, bars, wire profiles and other aluminum Production of alloy extrusion profiles. [0003] Aluminum alloy 3A21 is also an alloy widely used in the automotive industry, such as cylinder heads, engine blocks, wheel rims and aerospace parts of automobiles. Its advantages are light weight, excellent weldability, corrosion resistance, good mechanical strength, toughness, hardness, strength, air tightness, fluidity and machinability. The application of aluminum alloy 3A21 rims in the automotive industry helps reduce weight, improve fuel efficiency,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22F1/04
CPCC22C21/00C22F1/002C22F1/04
Inventor 庞俊铭周广宇
Owner CHINA ZHONGWANG
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