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Technique for improving performances of 7075 aluminum alloy extruded material

A process method and extruded material technology, applied in the field of aluminum alloys, can solve the problems of low production energy consumption and high production efficiency, and achieve the effects of improving production efficiency, shortening aging time, and improving tensile strength and yield strength

Inactive Publication Date: 2017-02-15
SHANDONG NANSHAN ALUMINUM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no process scheme in the aluminum extrusion industry, which can not only significantly improve the tensile properties of 7075 alloy extrusion materials, but also make the production efficiency higher or the production energy consumption lower

Method used

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  • Technique for improving performances of 7075 aluminum alloy extruded material
  • Technique for improving performances of 7075 aluminum alloy extruded material
  • Technique for improving performances of 7075 aluminum alloy extruded material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The produced product is an extruded round bar with a diameter of 50mm, and the extrusion ratio is 10.69.

[0036] (1) Alloy ingot heating: the heating temperature of the alloy ingot for 7075 alloy extrusion is 410°C, and the alloy composition of the alloy ingot used includes:

[0037] Si: 0.35%, Fe: 0.24%, Cu: 1.53%, Mn: 0.21%, Mg: 2.68%, Cr: 0.22%, Zn: 5.82%, Ti: 0.13%, other individual elements ≤ 0.05%, other impurity elements The total amount is ≤0.15%, and the balance is Al.

[0038] (2) Heating of the mold and the extrusion barrel: the heating temperature of the extrusion mold is 420°C, and the temperature of the extrusion barrel is 410°C.

[0039] (3) Extrusion: Put the mold and the alloy ingot with the required temperature into the extruder, adjust the extrusion rod speed to control the extrusion speed at 1-3m / min for extrusion.

[0040] (4) Solution treatment: heat the extruded round bar to 465°C±3°C for 150min.

[0041] (5) Quenching treatment: put the heat-...

Embodiment 2

[0045] The production product is 60*10mm flat row, and the extrusion ratio is 15.39.

[0046] (1) Alloy ingot heating: The heating temperature of the alloy ingot for 7075 alloy extrusion is 400°C, and the alloy composition of the alloy ingot used includes:

[0047] Si: 0.40%, Fe: 0.22%, Cu: 1.98%, Mn: 0.26%, Mg: 2.71%, Cr: 0.25%, Zn: 5.75%, Ti: 0.16%, other single elements ≤ 0.05%, other impurity elements The total amount is ≤0.15%, and the balance is Al.

[0048] (2) Heating of the mold and the extrusion barrel: the heating temperature of the extrusion mold is 460°C, and the temperature of the extrusion barrel is 440°C.

[0049] (3) Extrusion: put the mold and alloy ingot with the required temperature into the extruder, adjust the speed of the extrusion rod so that the extrusion speed is controlled at 2-5m / min for extrusion.

[0050] (4) Solution treatment: heat the extruded flat row to 472°C±3°C for heat preservation, and the heat preservation time is 30min.

[0051] (5) ...

Embodiment 3

[0055] The production product is 425*25mm flat row, and the extrusion ratio is 28.61.

[0056] (1) Alloy ingot heating: the heating temperature of the alloy ingot for 7075 alloy extrusion is 410°C, and the alloy composition of the alloy ingot used includes:

[0057] Si: 0.26%, Fe: 0.50%, Cu: 1.84%, Mn: 0.25%, Mg: 2.63%, Cr: 0.22%, Zn: 5.83%, Ti: 0.11%, other individual elements ≤ 0.05%, other impurity elements The total amount is ≤0.15%, and the balance is Al.

[0058] (2) Heating of the mold and the extrusion barrel: the heating temperature of the extrusion mold is 430°C, and the temperature of the extrusion barrel is 420°C.

[0059] (3) Extrusion: Put the mold and the alloy ingot with the required temperature into the extruder, adjust the extrusion rod speed to control the extrusion speed at 1-3m / min for extrusion.

[0060] (4) Solution treatment: heat the extruded flat row to 467°C±3°C for heat preservation, and the heat preservation time is 120min.

[0061] (5) Quenching ...

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Abstract

The invention provides a technique for improving the performances of a 7075 aluminum alloy extruding material. The technique comprises the following concrete technological steps: heating an alloy ingot manufactured from the 7075 alloy material; heating a mold and an extruding cylinder; putting the heated mold and ingot into an extruder and extruding; performing solution treatment on the extruded extruding material; quenching the extruding material which is subjected to the solution treatment; stretching the quenched extruding material; ageing the stretched extruding material. The invention also provides the alloy ingot used in the method, and the ingot comprises the following components in percentage by weight: smaller than or equal to 0.40% of Si, smaller than or equal to 0.50% of Fe, 1.5% to 2.0% of Cu, smaller than or equal to 0.3% of Mn, 2.5% to 2.9% of Mg, 0.20% to 0.28% of Cr, 5.5% to 5.9% of Zn, smaller than or equal to 0.2% of Ti, smaller than or equal to 0.05% of other single elements, other impurity elements and the balance Al, wherein the total amount of other impurity elements is smaller than or equal to 0.15%.

Description

technical field [0001] The invention belongs to the field of aluminum alloys, in particular to a process method for improving the performance of 7075 aluminum alloy extruded materials. Background technique [0002] 7075 alloy has been widely used in the aerospace field due to its high specific strength, low density, and excellent corrosion resistance. In GB / T6892 and AMS-QQ-A-200 / 11 and other domestic and foreign standards, the room temperature tensile performance indicators of 7075 alloy T6511 extruded materials are: tensile strength ≥ 540MPa, yield strength ≥ 480MPa, elongation after fracture ≥7%. Due to the difficulty in extrusion of 7075 alloy and the complicated production process, it directly leads to problems such as low production efficiency, high production energy consumption, and low room temperature tensile properties. To this end, scientific research institutes, universities and aluminum processing enterprises have carried out targeted research. [0003] Paten...

Claims

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Application Information

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IPC IPC(8): C22F1/053C22C21/10B21C29/00B21C29/02B21C31/00
CPCC22F1/053B21C29/003B21C29/02B21C31/00C22C21/10C22F1/002
Inventor 程仁寨肖栋王兴瑞
Owner SHANDONG NANSHAN ALUMINUM
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