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 wi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Example 1

[0019] (1) Select super-duralumin cast rods with chemical composition in the following range 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 flat molds are used for 7A04 materials, and the molds are heated to 440°C for 1.5 hours;

[0021] (3) The casting rod is put into the furnace to start heating, and the casting rod is heated to 440°C for 1.5 hours;

[0022] (4) The ingot barrel is heated, and the ingot barrel is heated to 410°C before extrusion, and kept warm for 8 hours;

[0023] (5) Put the cast rod and die into the extruder. The aluminum extrusion is controlled at a speed of 1.5m / min. The extrusion speed mainly depends on the shape and area of ​​the aluminum, and it is cooled to 50% by water quenching. ℃ / 30 seconds or less, extreme cooling has a good effect on obtaining the best strength and internal structure of the aluminum after processing; the pressure of th...

Example Embodiment

[0027] (9) Aging treatment, push the aluminum into the aging furnace, close the furnace door and start heating to 120°C for the first time, holding for 3 hours, then heating to 140°C for the second time, holding for 3 hours, and pulling the aluminum out of the furnace Air-cooled outside, air-cooled to below 50 ℃. Example 2

[0028] (1) Select super-duralumin cast rods with chemical composition in the following range 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 mold molds. The mold is heated to 450°C and kept for 2 hours; (3) The casting rod is put into the furnace to start heating, and the casting rod is heated to 450°C. Keep warm for 1.5 hours.

[0030] (4) The ingot barrel is heated, and the ingot barrel is heated to 420°C before extrusion, and kept for 9 hours;

[0031] (5) Put the cast rod and die into the extruder, the aluminum extrusion is controlled at ...

Example Embodiment

[0036] Example 3

[0037] (1) Select super-duralumin cast rods with chemical composition in the following range 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℃ and kept for 2.5 hours; (3) The cast rod is put into the furnace to start heating, and the cast rod is heated to 460°C. Keep warm for 2 hours;

[0039] (4) The ingot barrel is heated, the ingot barrel is heated to 430°C before extrusion, and the temperature is kept for 10 hours; (5) The casting rod and die are put into the extruder, and the aluminum extrusion is controlled 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℃ / 30 seconds by water-cooling quenching. Extreme cooling has a good effect on obtaining the best strength and internal structure of the aluminum material after p...

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PUM

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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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