Aluminum alloy bar with high strength and high tenacity and preparation technology thereof

A preparation process and aluminum alloy profile technology, which is applied in the field of metal material smelting, can solve problems such as low toughness, poor corrosion resistance, and lack of comprehensive performance, so as to reduce the heating temperature and extrusion speed, reduce the degree of dynamic recovery, and avoid The effect formed

Active Publication Date: 2017-09-26
浙江大侠铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The aluminum alloys mentioned above are either of low purity, low toughness, poor corrosion resistance, or poor formability, and are lacking in comprehensive performance. The aluminum alloys with excellent comprehensive performance that people expect have so far not yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A high-strength and high-toughness aluminum alloy bar, including the following elements: Zn 3.65%, Mn 0.58%, Mg0.86%, Sb 0.03%, Cu 0.09%, Zr 0.06%, V 0.07%, scandium elements 0.005%, The rest is Al and unavoidable impurities, and the total amount of Zn, Mn, and Mg is 5.09%.

[0028] The production process of the described high-strength and high-toughness aluminum alloy bar comprises the following steps:

[0029] (1) Put pure aluminum ingots into an intermediate frequency induction furnace for melting, the melting temperature is 730°C, the melting time is 20min, then lower the temperature to 660°C, keep the temperature for 20min to obtain molten aluminum, and heat the molten aluminum to 890°C in proportion Add zinc ingots, manganese ingots, magnesium ingots, antimony ingots, copper ingots, zirconium ingots, vanadium ingots and rare earth metals, turn on the circuit vibration device to fully mix the alloy liquid, and then cool to 660°C at a rate of 6°C / min. Add a slag re...

Embodiment 2

[0034] A high-strength and high-toughness aluminum alloy rod, including the following elements: Zn 3.92%, Mn 0.75%, Mg0.82%, Sb 0.05%, Cu 0.11%, Zr 0.08%, V 0.08%, scandium elements 0.006%, The rest is Al and unavoidable impurities, and the total amount of Zn, Mn, and Mg is 5.49%.

[0035] The production process of the described high-strength and high-toughness aluminum alloy bar comprises the following steps:

[0036] (1) Put pure aluminum ingots into an intermediate frequency induction furnace for melting, the melting temperature is 731°C, the melting time is 20min, then lower the temperature to 660°C, keep it warm for 20min to obtain molten aluminum, and heat the molten aluminum to 890°C in proportion Add zinc ingots, manganese ingots, magnesium ingots, antimony ingots, copper ingots, zirconium ingots, vanadium ingots and rare earth metals, turn on the circuit vibration device to fully mix the alloy liquid, and then cool to 660°C at a rate of 6°C / min. Add a slag remover to t...

Embodiment 3

[0041] A high-strength and high-toughness aluminum alloy bar, including the following elements: Zn 4.22%, Mn 0.90%, Mg 1.03%, Sb 0.02%, Cu 0.11%, Zr 0.08%, V 0.12%, scandium elements 0.009%, The rest is Al and unavoidable impurities, and the total amount of Zn, Mn, and Mg is 6.15%.

[0042] The preparation process of the high-strength and high-toughness aluminum alloy rod comprises the following steps:

[0043] (1) Add pure aluminum ingots to an intermediate frequency induction furnace for melting. The melting temperature is 733°C, and the melting time is 30 minutes. Then, the temperature is lowered to 670°C, and the temperature is kept for 20 minutes to obtain molten aluminum. Heat the molten aluminum to 890°C in proportion Add zinc ingots, manganese ingots, magnesium ingots, antimony ingots, copper ingots, zirconium ingots, vanadium ingots and rare earth metals, turn on the circuit vibration device to fully mix the alloy liquid, and then cool to 660°C at a rate of 7°C / min. ...

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Abstract

The invention provides an aluminum alloy profile with high strength and high tenacity and a preparation technology thereof, and relates to the technical field of metal material smelting. Setting the total weight of the aluminum alloy profile as the base, an aluminum alloy bar with the high strength and the high tenacity includes, by weight, 3.15-5.21% of Zn, 0.35-1.2% of Mn, 0.56-1.28% of Mg, 0.01-0.08% of Sb, 0.08-0.15% of Cu, 0.05-0.12% of Zr, 0.06-0.16% of V, 0.003-0.012% of rare earth elements, the balance Al and unavoidable impurities. The aluminum alloy profile with the high tenacity forms an aluminide dispersed phase in the system through aluminum and other metal, the synergistic effect is generated, the effects of refining casting grains and strengthening pin dislocation are achieved, so that the recrystallization temperature of the aluminum alloy profile is improved dramatically, recrystallization of the grains is reduced, the problem of quenching sensitivity is solved, and the strength, the fracture tenacity and the stress corrosion resistance of the aluminum alloy profile are improved.

Description

[0001] machine technology [0002] The invention relates to the technical field of metal material smelting, in particular to a preparation process of high-strength and high-toughness aluminum alloy rods. Background technique [0003] my country is already the world's largest producer, exporter and consumer of aluminum extrusions. At present, my country's aluminum extrusion industry has entered a new stage of scale and technological upgrading, and is in an important period of change and transformation. Now the aluminum alloy industry has been developing in the direction of producing environmentally friendly, low energy consumption, and excellent alloy properties. [0004] Continuous extrusion is an important process for the production of aluminum alloy profiles. Continuous extrusion rods do not require preheating, but require good toughness, shape and formability for the billet. The aluminum alloys formed by continuous extrusion mainly include: 1 series, 3 series and 6 series...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22C1/02C22C1/06C22F1/053
CPCC22C1/026C22C1/06C22C21/10C22F1/053
Inventor 董学民
Owner 浙江大侠铝业有限公司
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