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Aluminum alloy treated by using TiN powder and BeH2 powder, and preparation method thereof

A technology of aluminum alloy and aluminum alloy melt, applied in the field of high-strength aluminum alloy, can solve the problems of inability to meet the requirements of mechanical properties, poor formability, high price, etc. The effect of enhancing the strength of the alloy

Inactive Publication Date: 2013-06-26
GUIZHOU ALUMINUM MATERIALS ENG TECHRES CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Al-Be master alloy is expensive, and the smelting of this master alloy is more harmful to the human body
[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, the tempering resistance is poor, and they cannot meet higher mechanical property requirements. Or some special properties (such as heat resistance, corrosion resistance), etc., are also major defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] One using TiN and BeH 2 Powder-treated aluminum alloys, in mass percent, include 0.4% Si, 0.7% Fe, 0.15% Cu, 0.15% Mn, 0.04% Cr, 0.8% Mg, 0.25% Zn, 0.15% Ti, 1.0% Ti, 1.0% N, 1.0% Be, 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 percentage 0.15%.

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

[0035] Step 1: Prepare materials according to the components of the high-strength aluminum alloy, including 0.4% Si, 0.7% Fe, 0.15% Cu, 0.15% Mn, 0.04% Cr, and 0.8% Mg in the mass percentage of the total product , 0.25% Zn, 0.15% 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 Step 1 first accord...

Embodiment 2

[0039] One using TiN and BeH 2 Powder-treated aluminum alloys, in mass percent, including 0.6% Si, 0.5% Fe, 0.25% Cu, 0.1% Mn, 0.15% Cr, 1.0% Mg, 0.2% Zn, 0.1% Ti, 1.5% Ti, 1.5% N, 1.5% Be, 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 percentage 0.15%.

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

[0041] Step 1: Prepare materials according to the components of the high-strength aluminum alloy, including 0.6% Si, 0.5% Fe, 0.25% Cu, 0.1% Mn, 0.15% Cr, and 1.0% Mg in the mass percentage of the total product , 0.2% Zn, 0.1% Ti;

[0042] Step 2: Add aluminum ingots or molten aluminum into the smelting furnace first, heat it to melt it completely, add the materials prepared in Step 1 first according ...

Embodiment 3

[0045] One using TiN and BeH 2 Powder-treated aluminum alloys, in mass percent, include 0.8% Si, 0.5% Fe, 0.4% Cu, 0.09% Mn, 0.35% Cr, 1.2% Mg, 0.1% Zn, 0.06% Ti, 2.0% Ti, 2.0% N, 2.0% Be, 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 percentage 0.15%.

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

[0047] Step 1: Prepare materials according to the components of the high-strength aluminum alloy, including 0.8% of Si, 0.5% of Fe, 0.4% of Cu, 0.09% of Mn, 0.35% of Cr, and 1.2% of Mg in the mass percentage of the total product , 0.1% Zn, 0.06% Ti;

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

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Abstract

The invention relates to an aluminum alloy treated by using TiN powder and BeH2 powder, and a preparation method thereof. The process comprises the step of adding 1.0-2.0% of Ti element, 1.0-2.0% of N element and 1.0-2.0% of Be element in powder form into a melted deformation aluminum alloy, and the addition of the power in fluidized form into the aluminum alloy melt along with protective gases is such that a specific surface area which is much greater than common bulk materials is obtained, rapid dispersion and sufficient contact with the melt can be realized, and time for dispersion and time for uniform distribution are significantly shortened. At the same time, by using the high strength aluminum alloy of the invention in a casting process, heterogeneous nucleation cores can be increased effectively in an alloy solidification process, so that grain refining effect is achieved, and the strength of the cast alloy is enhanced. Moreover, the added elements can promote formation of interstitial atom and interstitial phase, solubility in alpha (Al) solid solutions is high at high temperature and is low at room temperature, so that the cast alloy has a high heat-processibility characteristic, and the strength and the hardness of the cast alloy are significantly improved after heat treatment.

Description

technical field [0001] The invention relates to a high-strength aluminum alloy and a preparation method thereof. Background technique [0002] When the Al-Mg-Si-Cu aluminum alloy is inappropriate due to the composition and casting process, it is easy to form high hardness compounds. Especially when the silicon content is less than 12% (mass fraction), and the content of Mn+Fe is higher than 0.8% (mass fraction), it is very easy to form Al 12 Si(FeMn) 3 compound. Due to the high hardness of the aluminum alloy after forming, the tool wear is serious during machining, and white bright hard spots can be seen on the machined surface with the naked eye, and the hard spots are bone-like or irregular granular in microscopic observation. The composition of this hard point is determined by energy spectrum composition to be Al-Si-Mn-Fe, and its morphology is easily confused with primary silicon in the alloy. When the aluminum alloy with such a hard point compound is formed, not o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/06C22C21/00
Inventor 张可中门三泉车云陈新孟
Owner GUIZHOU ALUMINUM MATERIALS ENG TECHRES CENT