WN2 and LiBH4 powder added high-strength aluminum alloy and preparation method thereof

A high-strength, aluminum alloy technology, applied in the field of high-strength aluminum alloys, can solve the problems of not meeting the requirements of mechanical properties, low hardenability of large ingots, poor formability, etc., to achieve uniform microscopic distribution and shorten dispersion. and uniform time, strength and hardness increasing effect

Inactive Publication Date: 2012-04-25
GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It can be seen that in addition to the poor formability of the current aluminum alloy materials when casting large ingots, the hardenability of large ingots during heat treatment is not high, t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A way to add WN 2 and LiBH 4 Powdered high-strength aluminum alloy, in mass percent, including 0.5% Si, 0.5% Fe, 0.15% Cu, 0.45% Mg, 0.25% Zn, 0.15% Sn, 0.01% Ti, 0.65% W, 1.3% N, 0.6% Li, 0.65% B, the balance is Al and unavoidable impurities, the content of each impurity does not exceed 0.05% of the total mass percentage, and the content of all impurities does not exceed the total mass 0.15% of the percentage.

[0034] The present invention also provides a method for preparing the high-strength aluminum alloy, adding WN in a composite treatment 2 and LiBH 4 , including the following steps:

[0035] Step 1: Prepare materials according to the components of the high-strength aluminum alloy, including 0.5% Si, 0.5% Fe, 0.15% Cu, 0.45% Mg, 0.25% Zn, and 0.15% Sn in the mass percentage of the total product , 0.01% Ti;

[0036] Step 2: Add aluminum ingots or molten aluminum into the smelting furnace first, heat it to melt it completely, add the materials prepared in Ste...

Embodiment 2

[0039] A way to add WN 2 and LiBH 4 Powdered high-strength aluminum alloy, in mass percent, including 0.6% Si, 0.4% Fe, 0.25% Cu, 0.52% Mg, 0.2% Zn, 0.25% Sn, 0.03% Ti, 0.95% W, 1.9% N, 0.95% Li, 0.95% B, the balance is Al and unavoidable impurities, the content of each impurity does not exceed 0.05% of the total mass percentage, and the content of all impurities does not exceed the total mass 0.15% of the percentage.

[0040] The present invention also provides a method for preparing the high-strength aluminum alloy, adding WN in a composite treatment 2 and LiBH 4 , including the following steps:

[0041] Step 1: Prepare materials according to the components of the high-strength aluminum alloy, including 0.6% of Si, 0.4% of Fe, 0.25% of Cu, 0.52% of Mg, 0.2% of Zn, and 0.25% of Sn in the mass percentage of the total product , 0.03% Ti;

[0042] Step 2: Add aluminum ingots or molten aluminum into the smelting furnace first, heat it to melt it completely, add the material...

Embodiment 3

[0045] A way to add WN 2 and LiBH 4 Powdered high-strength aluminum alloy, by mass percentage, including 0.7% Si, 0.3% Fe, 0.35% Cu, 0.6% Mg, 0.15% Zn, 0.35% Sn, 0.04% Ti, 1.2% W, 2.4% N, 1.2% Li, 1.2% B, the balance is Al and unavoidable impurities, the content of each impurity does not exceed 0.05% of the total mass percentage, and the content of all impurities does not exceed the total mass 0.15% of the percentage.

[0046] The present invention also provides a method for preparing the high-strength aluminum alloy, adding WN in a composite treatment 2 and LiBH 4 , including the following steps:

[0047] Step 1: Prepare materials according to the components of the high-strength aluminum alloy, including 0.7% of Si, 0.3% of Fe, 0.35% of Cu, 0.6% of Mg, 0.15% of Zn, and 0.35% of Sn in the mass percentage of the total product , 0.04% Ti;

[0048] Step 2: Add aluminum ingots or molten aluminum into the smelting furnace first, heat it to melt it completely, add the material...

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Abstract

The invention relates to a WN2 and LiBH4 powder added high-strength aluminum alloy and a preparation method thereof. 0.65-1.2% of W powder, 1.3-2.4% of N powder, 0.65-1.2% of Li powder and 0.65-1.2% of B powder are added into a wrought aluminum alloy. In a process of adding aluminum alloy melt together with protective gas in a fluidization form, a specific surface area is much greater than that of a general massive material, rapid dispersion and full contact with the melt can be realized, and the dispersion and homogenization time is obviously shortened. Meanwhile, by adopting the high-strength aluminum alloy provided by the invention, in a casting process, a heterogeneous nucleation core can be effectively increased during alloy solidification, thereby achieving the grain refining effectand enhancing the alloy strength. Moreover, the added elements can promote the formation of interstitial atoms and interstitial phases; the solubility in an alpha (Al) solid solution is large at hightemperature and is very small at room temperature, therefore the alloy has higher heat-treatability; and after heat treatment, the strength and hardness of the alloy are greatly improved.

Description

technical field [0001] The invention relates to a high-strength aluminum alloy and a preparation method thereof. Background technique [0002] W is the metal element with the highest melting point of a single substance. According to the results of metallographic research, it should have a good high-temperature strengthening effect on aluminum alloys; N has a strengthening effect on aluminum alloys and can avoid slag and pores; when B is used together with titanium, it can Improve the effect of grain refinement; Li and Cu can form a high-melting point metal compound phase in aluminum alloys, which has a small softening tendency at high temperatures and can greatly improve the high-temperature strength of aluminum alloys. [0003] However, the technical means to effectively add the above-mentioned elements to the aluminum alloy is very lacking. Moreover, W and Li are diametrically opposed in terms of gravity, one is a typical heavy element, and the other is a representative o...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/02C22C1/10
Inventor 门三泉车云张中可李祥
Owner GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES
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