Aluminum alloy material as well as preparing method and application thereof

A technology of aluminum alloy materials and master alloys, applied in high toughness, high weldability aluminum alloy materials and their preparation, aluminum alloy materials, high strength fields, to achieve high toughness, high weldability, and eliminate weldability Effect

Inactive Publication Date: 2015-04-29
ZHEJIANG LEXIANG ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional 6063 alloy, due to the influence of excess silicon and impurity content, is very easy to form point-shaped blisters and small cracks caused by poor welding along the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In this embodiment, an aluminum alloy material is prepared by the following method:

[0033] 1) Casting

[0034] First, 45 kg of aluminum-silicon master alloy, 10 kg of aluminum-bismuth master alloy, 26 kg of aluminum-rare-earth master alloy and 880 kg of aluminum ingot are heated together to 760°C for melting. Among them, the weight percent content of silicon in the aluminum-silicon master alloy is 12%; the weight percent content of bismuth in the aluminum-bismuth master alloy is 10%; and the weight percent content of silicon in the aluminum-rare-earth master alloy is 10%. Then add 5.8 kilograms of bulk pure magnesium ingots. Then the melt is refined by inert gas-flux mixed refining method. Among them, the inert gas uses high-purity nitrogen with a purity of not less than 99.997%, and the flux uses 40% KCl, 35% NaCl, and 25% NaCl by weight. 3 AlF 6 Composed of powdery flux, the amount of flux is 1.5kg / t melt weight ratio, the refining temperature is controlled at 7...

Embodiment 2

[0045] In this embodiment, an aluminum alloy material is prepared by the following method:

[0046] 1) Casting

[0047] First, 45 kg of aluminum-silicon master alloy, 15 kg of aluminum-bismuth master alloy, 30 kg of aluminum-rare-earth master alloy and 885 kg of aluminum ingot are heated together to 740°C for melting. Among them, the weight percent content of silicon in the aluminum-silicon master alloy is 12%; the weight percent content of bismuth in the aluminum-bismuth master alloy is 10%; and the weight percent content of silicon in the aluminum-rare-earth master alloy is 10%. Then add 5.2 kilograms of bulk pure magnesium ingots. Then the melt is refined by inert gas-flux mixed refining method. Among them, the inert gas uses high-purity nitrogen with a purity of not less than 99.997%, and the flux uses 40% KCl, 35% NaCl, and 25% NaCl by weight. 3 AlF 6 Composed of powdery flux, the amount of flux is 1.5kg / t melt weight ratio, the refining temperature is controlled at 7...

Embodiment 3

[0058] In this embodiment, an aluminum alloy material is prepared by the following method:

[0059] 1) Casting

[0060] First, 55 kg of aluminum-silicon master alloy, 20 kg of aluminum-bismuth master alloy, 30 kg of aluminum-rare-earth master alloy and 890 kg of aluminum ingot are heated together to 760°C for melting. Among them, the weight percent content of silicon in the aluminum-silicon master alloy is 12%; the weight percent content of bismuth in the aluminum-bismuth master alloy is 10%; and the weight percent content of silicon in the aluminum-rare-earth master alloy is 10%. Then add 7.5 kilograms of lumpy pure magnesium ingots. Then the melt is refined by inert gas-flux mixed refining method. Among them, the inert gas uses high-purity nitrogen with a purity of not less than 99.997%, and the flux uses 40% KCl, 35% NaCl, and 25% NaCl by weight. 3 AlF 6 Composed of powdery flux, the amount of flux is 1.5kg / t melt weight ratio, the refining temperature is controlled at ...

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Abstract

The invention relates to an aluminum alloy material, in particular to an aluminum alloy material with high strength, high toughness and high welding performance as well as a preparing method and application thereof, and belongs to the field of nonferrous metal materials. The aluminum alloy material comprises the following components in percentage by mass: 0.55-1.0% of Mg, 0.40-0.80% of Si, 0.05-0.25% of Bi, 0.10-0.45% of Re and the balance of Al and unavoidable impurities. The aluminum alloy material has the characteristics of high strength, high toughness and high welding performance, and can be used as the raw material of pressure pipelines, porous flat flow pipes for air conditioner heat radiators and box structural components of rail vehicles.

Description

technical field [0001] The invention relates to an aluminum alloy material, in particular to a high-strength, high-toughness, high-weldability aluminum alloy material and its preparation method and application, belonging to the field of non-ferrous metal materials. Background technique [0002] At present, aluminum alloy pressure pipes, porous flat flow pipes for air-conditioning radiators, and rail vehicle boxes that require high strength, high toughness, and high welding performance are all made of 6063-T5 aluminum alloy materials, and its main components: Mg0.45~ 0.9%, Si0.2~0.6%, its tensile strength ≥ 160Mp, yield strength ≥ 110MPa, elongation ≥ 8%. Ordinary 6063-T5 alloy is extruded by air cooling and quenching, and the cooling rate is limited. In addition, the high temperature age hardening process is used to form a precipitation-free zone (PFZ) on both sides of the grain boundary. If the alloy strength increases, the brittleness of the alloy will also increase. ...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C1/03C22C1/06C22F1/05
Inventor 金祥龙
Owner ZHEJIANG LEXIANG ALUMINUM
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