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Molding and aging technology of 7A04 superhard aluminum alloy section bar

A hard aluminum alloy and super hard aluminum technology, which is applied in the field of forming and timeliness of 7A04 super hard aluminum alloy profiles, can solve problems such as failure to meet performance requirements and poor forming stability of aluminum profiles, and achieve high yield and processing. high effect

Inactive Publication Date: 2013-11-20
ZHEJIANG RUIJIN COPPER ALUMINUM SECTION BAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to high strength, traditional forming and aging processing cannot meet the performance requirements
The ordinary processing technology is generally to obtain aluminum materials with different cross-sectional shapes through hot melting and extrusion of aluminum rods. This traditional process method has the problem of poor forming stability of aluminum profiles.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Select superhard aluminum cast rods that meet the following chemical composition for heating: Si: ≤0.3 Fe: ≤0.35 Cu: ≤0.2 Mn: ≤0.3 Mg: 0.9-1.0 Cr: ≤0.2 Zn: 5.5-6.0 Ti : ≤0.2 Zr: 0.05-0.25.

[0020] (2) Mold heating. Generally, 7A04 materials use flat molds. The mold is heated to 440°C and kept for 1.5 hours;

[0021] (3) Put the cast rod into the furnace and start heating, heat the cast rod to 440°C and keep it warm for 1.5 hours;

[0022] (4) Heating the ingot cylinder, heating the ingot cylinder to 410°C before extrusion, and keeping it warm for 8 hours;

[0023] (5) Put the cast rod and mold into the extruder, and control the extrusion speed of aluminum at 1.5m / min. The speed during extrusion mainly depends on the shape and area of ​​the aluminum, and it is cooled to 50 by water cooling and quenching. ℃ / 30 seconds or less, extremely rapid cooling has a good effect on the subsequent processing of aluminum to obtain the best strength and internal structure; the e...

Embodiment 2

[0028] (1) Select superhard aluminum cast rods that meet the following chemical composition for heating: Si: ≤0.3 Fe: ≤0.35 Cu: ≤0.2 Mn: ≤0.3 Mg: 0.9-1.0 Cr: ≤0.2 Zn: 5.5-6.0 Ti : ≤0.2 Zr: 0.05-0.25.

[0029] (2) Mold heating. Generally, 7A04 materials use flat molds. The mold is heated to 450°C and kept for 2 hours; (3) The cast rod is loaded into the furnace to start heating. The cast rod is heated to 450°C Keep warm for 1.5 hours.

[0030] (4) Heating the ingot cylinder, heating the ingot cylinder to 420°C before extrusion, and keeping it warm for 9 hours;

[0031] (5) Put the cast rod and mold into the extruder, and control the extrusion speed of the aluminum material at a speed of 3m / min. The speed during extrusion mainly depends on the shape and area of ​​the aluminum material, and it is cooled to 50°C by water cooling and quenching / less than 30 seconds, extremely rapid cooling has a good effect on the subsequent processing of aluminum to obtain the best strength and...

Embodiment 3

[0037] (1) Select superhard aluminum cast rods that meet the following chemical composition for heating: Si: ≤0.3 Fe: ≤0.35 Cu: ≤0.2 Mn: ≤0.3 Mg: 0.9-1.0 Cr: ≤0.2 Zn: 5.5-6.0 Ti : ≤0.2 Zr: 0.05-0.25.

[0038] (2) Mold heating. Generally, 7A04 materials use flat molds. The mold is heated to 460°C and kept for 2.5 hours; (3) The cast rod is loaded into the furnace and heated, and the cast rod is heated to 460°C. keep warm for 2 hours;

[0039] (4) Heat the ingot cylinder, heat the ingot cylinder at 430°C before extrusion, and keep it warm for 10 hours; (5) Put the cast rod and mold into the extrusion machine, and control the aluminum extrusion at a speed of 5m / min , The speed during extrusion mainly depends on the shape and area of ​​the aluminum material. It is cooled to below 50°C / 30 seconds by water-cooling and quenching. Extremely rapid cooling has a good effect on the subsequent processing of the aluminum material to obtain the best strength and internal structure; The ex...

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Abstract

The invention discloses a molding and aging technology of a 7A04 superhard aluminum alloy section bar. The molding and aging technology comprises the following steps of selecting a specific aluminum material, heating a mold, heating a casting bar, heating an ingot-receiving cylinder, putting the casting bar and the mold into an extruder, carrying out extrusion, carrying out residual thickness extrusion, carrying out cooling, stretching and straightening crops and tailing so that a finished product is obtained, and carrying out framing, aging and air cooling. The molding and aging technology has molding stability, realizes extrusion molding and has good processing effects.

Description

technical field [0001] The invention relates to a forming process of an aluminum profile, in particular to a forming and aging process of a 7A04 superhard aluminum alloy profile. Background technique [0002] 7A04 superhard aluminum alloy is stronger and lighter than ordinary silicon-magnesium-aluminum alloys and some hard aluminum alloys on the market. It is an aviation aluminum material. The hardness of silicon-magnesium-aluminum alloys in the general T6 state is 100-126HV ( Vickers hardness value), generally the hardness of T6 aluminum alloy is 121-145HV (Vickers hardness value), while the hardness of 7A04 aluminum alloy is ≥145HV. Due to the high strength, traditional forming and aging processing cannot meet the performance requirements. The ordinary processing technology is generally to obtain aluminum materials with different cross-sectional shapes through hot melting and extrusion of aluminum rods. This traditional process method has the problem of poor forming stab...

Claims

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Application Information

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IPC IPC(8): B21C23/02B23P15/00C22F1/04
Inventor 黄高勇胡小平李永坤陈国华吕德忠
Owner ZHEJIANG RUIJIN COPPER ALUMINUM SECTION BAR
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