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High-strength aluminum alloy for door frame and preparation technology of high-strength aluminum alloy

A preparation process and aluminum alloy technology, which is applied in the field of aluminum alloy processing, can solve problems such as low strength and insufficient corrosion resistance, and achieve the effects of improving the mechanical properties of the alloy, excellent fatigue resistance, and inhibiting recrystallization and

Inactive Publication Date: 2018-11-20
薛士军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The corrosion resistance of the aluminum alloy doors and windows has been improved to a certain extent, but there are still problems of insufficient corrosion resistance, and at the same time, there are also problems of low strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The high-strength aluminum alloy is used for the door frame of this embodiment, and the formula ratio is as follows: Si 0.54%, Mg0.55%, Zn 0.21%, Co 0.34%, V 0.08%, Ti 0.11%, Nb 0.02%, Cr 0.22% , Ce 0.02%, Sc0.01%, the balance is aluminum and other unavoidable impurities.

[0035] The present invention also provides a preparation process for the above-mentioned high-strength aluminum alloy for the door frame, comprising the following steps:

[0036] (1) Put the aluminum ingot into the furnace and heat it to 720-740°C, keep it warm until the aluminum ingot melts;

[0037] (2) Sprinkle the slagging agent evenly into the furnace at 700-720°C and stir it fully for 20-25 minutes, and remove the scum on the surface of the aluminum liquid with a rake;

[0038] (3) Heat the aluminum solution in step (2) to 740-760°C, add Si, Mg, Zn, Co, Cr, and stir for 20-30 minutes to melt all the alloying elements to obtain aluminum alloy liquid;

[0039] (4) When the temperature of the al...

Embodiment 2

[0054] The high-strength aluminum alloy is used for the door frame of this embodiment, and the formula ratio is as follows: Si 0.58%, Mg0.60%, Zn 0.25%, Co 0.38%, V 0.12%, Ti 0.15%, Nb 0.05%, Cr 0.26% , Ce 0.04%, Sc0.03%, the balance is aluminum and other unavoidable impurities.

[0055] The present invention also provides a preparation process for the above-mentioned high-strength aluminum alloy for the door frame, comprising the following steps:

[0056] (1) Put the aluminum ingot into the furnace and heat it to 720-740°C, keep it warm until the aluminum ingot melts;

[0057] (2) Sprinkle the slagging agent evenly into the furnace at 700-720°C and stir it fully for 20-25 minutes, and remove the scum on the surface of the aluminum liquid with a rake;

[0058] (3) Heat the aluminum solution in step (2) to 740-760°C, add Si, Mg, Zn, Co, Cr, and stir for 20-30 minutes to melt all the alloying elements to obtain aluminum alloy liquid;

[0059] (4) When the temperature of the al...

Embodiment 3

[0074] The high-strength aluminum alloy is used for the door frame of this embodiment, and the formula ratio is as follows: Si 0.56%, Mg0.57%, Zn 0.23%, Co 0.36%, V 0.10%, Ti 0.13%, Nb 0.04%, Cr 0.24% , Ce 0.03%, Sc0.02%, the balance is aluminum and other unavoidable impurities.

[0075] The present invention also provides a preparation process for the above-mentioned high-strength aluminum alloy for the door frame, comprising the following steps:

[0076] (1) Put the aluminum ingot into the furnace and heat it to 720-740°C, keep it warm until the aluminum ingot melts;

[0077] (2) Sprinkle the slagging agent evenly into the furnace at 700-720°C and stir it fully for 20-25 minutes, and remove the scum on the surface of the aluminum liquid with a rake;

[0078] (3) Heat the aluminum solution in step (2) to 740-760°C, add Si, Mg, Zn, Co, Cr, and stir for 20-30 minutes to melt all the alloying elements to obtain aluminum alloy liquid;

[0079] (4) When the temperature of the al...

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Abstract

The invention discloses a high-strength aluminum alloy for a door frame and a preparation technology of the high-strength aluminum alloy. The high-strength aluminum alloy comprises, by weight, 0.55-0.57% of Si, 0.56-0.58% of Mg, 0.22-0.24% of Zn, 0.35-0.37% of Co, 0.09-0.11% of V, 0.12-0.14% of Ti, 0.03-0.05% of Nb, 0.23-0.25% of Cr, 0.02-0.04% of Ce, 0.01-0.03% of Sc, and the balance aluminum andunavoidable impurities. Through compound addition of CO, V, Ti and Nb in the aluminum alloy and specially-designed preparation technology parameters, recrystallization and grain growth are restrained, and therefore aluminum alloy section steel can obtain the single fibrous grain structure in the extrusion direction, and strength and corrosion resistance performance of the aluminum alloy can be improved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy processing, in particular to a high-strength aluminum alloy for a door frame and a preparation process thereof. Background technique [0002] The aluminum alloy door frame is a door frame component made of surface-treated aluminum alloy profiles through blanking, drilling, milling, tapping, manufacturing and other processing processes, and then used with connectors, sealing materials and opening and closing hardware accessories Assembled. Since it is directly made of aluminum alloy, this requires the aluminum alloy used to make the door frame to have high strength, fracture toughness and excellent corrosion resistance, so as to improve impact absorption characteristics, resistance to bending and crushing, and durability. However, at present, the aluminum alloy door frame is very easy to be scratched by foreign objects during use, which will cause the entire aluminum alloy door frame to be ...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C1/02C22C1/06C22F1/05
CPCC22C21/08C22C1/026C22C1/06C22F1/05
Inventor 薛士军
Owner 薛士军