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High-strength aluminum alloy treated by AlH3 and preparation method of high-strength aluminum alloy

An aluminum alloy and high-strength technology, which is applied in the field of high-strength aluminum alloys, can solve the problems of poor tempering resistance, poor formability, and low hardenability of large ingots, and achieve high heat treatability, strength and hardness. Effect of preventing coarsening

Inactive Publication Date: 2012-05-09
GUIZHOU ALUMINUM MATERIALS ENG TECHRES CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 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 performance requirements or some special requirements. Performance (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

[0018] A high-strength aluminum alloy, by mass percentage, including 0.2% Si, 0.35% Fe, 0.1% Cu, 0.1% Mn, 0.1% Cr, 0.45% Mg, 0.1% Zn, 0.1% Ti, the balance is Al and unavoidable impurities, the content of each impurity is not more than 0.05% of the total mass percentage, and the content of all impurities is not more than 0.15% of the total mass percentage.

[0019] The present invention also provides a method for preparing the high-strength aluminum alloy, adding AlH 3 , including the following steps:

[0020] Step 1: Prepare materials according to the components of the high-strength aluminum alloy, including 0.2-0.6% of Si, 0.35% or less of Fe, 0.1% or less of Cu, 0.1% or less of Mn, less than or equal to 0.1% of the total product mass percentage Equal to 0.1% Cr, 0.45-0.9% Mg, less than or equal to 0.1% Zn, less than or equal to 0.1% Ti;

[0021] Step 2: Add aluminum ingots or molten aluminum into the smelting furnace first, heat it to melt it completely, add the materials ...

Embodiment 2

[0026] A high-strength aluminum alloy, by mass percentage, including 0.4% Si, 0.3% Fe, 0.08% Cu, 0.08% Mn, 0.06% Cr, 0.7% Mg, 0.07% Zn, 0.05% Ti, the balance is Al and unavoidable impurities, the content of each impurity is not more than 0.05% of the total mass percentage, and the content of all impurities is not more than 0.15% of the total mass percentage.

[0027] The present invention also provides a method for preparing the high-strength aluminum alloy, adding AlH 3 , including the following steps:

[0028] Step 1: Prepare materials according to the components of the high-strength aluminum alloy, including 0.4% Si, 0.3% Fe, 0.08% Cu, 0.08% Mn, 0.06% Cr, and 0.7% Mg in the mass percentage of the total product , 0.07% Zn, 0.05% Ti;

[0029] 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 to the formula ratio, make it completely dissolved and melted, and heat...

Embodiment 3

[0034]A high-strength aluminum alloy, by mass percentage, including 0.6% Si, 0.25% Fe, 0.06% Cu, 0.09% Mn, 0.03% Cr, 0.9% Mg, 0.09% Zn, 0.05% Ti, the balance is Al and unavoidable impurities, the content of each impurity is not more than 0.05% of the total mass percentage, and the content of all impurities is not more than 0.15% of the total mass percentage.

[0035] The present invention also provides a method for preparing the high-strength aluminum alloy, adding AlH 3 , including the following steps:

[0036] Step 1: Prepare materials according to the components of the high-strength aluminum alloy, including 0.6% of Si, 0.25% of Fe, 0.06% of Cu, 0.09% of Mn, 0.03% of Cr, and 0.9% of Mg in the mass percentage of the total product , 0.09% Zn, 0.05% Ti;

[0037] 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 to the formula ratio, make it completely dissolved a...

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Abstract

The invention discloses a high-strength aluminum alloy treated by AlH3 and a preparation method of the high-strength aluminum alloy. The preparation method comprises the following steps of: heating a hot aluminum ingot or molten aluminum liquid to be completely melted; adding Si, Fe, Cu, Mn, Mg, Zn and Ti to be completely dissolved and melted; refining and keeping the temperature of 700-1000DEG Cto obtain an alloy melt; carrying out deaerating purification on the alloy melt by using nitrogen gas or inert gas or mixed gas formed by the nitrogen gas and the inert gas in any ratio and continuously introducing gas until the reaction is ended; meanwhile, adding AlH3 powder into the alloy melt along with the gas in a fluidizaton mode; stirring the mixture to enable the AlH3 to be uniformly distributed on the alloy melt and sufficiently reacted with the alloy melt; standing and adjusting the temperature to be 680-730DEG C; and discharging the alloy liquid from a furnace for casting production. According to the high-strength aluminum alloy and the preparation method thereof disclosed by the invention, the defects of performances of a traditional aluminum alloy can be overcome; the strongtenacity, the formability and the hardenability of the aluminum alloy are improved; and a high-end substrate for high-efficiency deep processing is provided.

Description

technical field [0001] The invention relates to a high-strength aluminum alloy and a preparation method thereof. Background technique [0002] Adding "cold aluminum" to the aluminum alloy melt is easier to cast high-quality castings and ingots, because various forms of "cold aluminum" such as excess, trimming and scrap used as return materials have finer grains. The grain structure can maintain this high-quality substructure in the melt for a short time, thus affecting the crystallization behavior during casting. However, "cold aluminum" also contains more impurities such as oxides, iron, and silicon, which is not conducive to the purification of the alloy. [0003] Aluminum alloys for deep processing often need to be first cast into large ingots, such as flat ingots, round bars, etc., and then processed into various finished products by means of rolling, extrusion, forging, etc. These processes are basically related to heat treatment. Combined, if the final product can be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C1/02C22C1/06
Inventor 张中可车云门三泉
Owner GUIZHOU ALUMINUM MATERIALS ENG TECHRES CENT
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