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High-strength aluminum alloy added with AlCrN and RbH and preparation method of aluminum alloy

An aluminum alloy, high-strength technology, applied in the field of high-strength aluminum alloys, can solve the problems of poor tempering resistance, low strength, poor formability, etc., and achieve high heat treatability, enhanced alloy strength, and improved strength and hardness.

Inactive Publication Date: 2012-04-18
GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] According to statistics, among the more than 500 kinds of deformed aluminum alloy materials in the world, there are less than 20 aluminum alloys commonly used for melting and casting large ingots. Among them, the aluminum alloys most commonly used for melting and casting large ingots and producing thick plates are 5083, 5026, and 6082 , 2017, 2024, 2219, 7075, 7050, etc. Among these materials, 2XXX series and 7XXX series belong to the category of duralumin and super duralumin, and their thick plates are mostly used in the aerospace industry, but their performance in melting and casting large ingots is very poor. Poor, the forming rate of flat ingot and round bar is very low; 5XXX series and 6XXX series alloys have good casting performance, but low strength; other aluminum alloys such as 1XXX series and 3XXX series belong to the category of soft aluminum
[0003] 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

[0021] A high-strength aluminum alloy, by mass percentage, including 1.0% Si, 0.5% Fe, 0.15% Cu, 0.4% Mn, 0.1% Cr, 0.5% Mg, 0.25% Zn, 0.6% Cr, 0.16% N, 0.98% Rb, 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.

[0022] The present invention also provides a method for preparing the high-strength aluminum alloy, adding AlCrN and RbH in a composite treatment, including the following steps:

[0023] Step 1: Prepare materials according to the components of the high-strength aluminum alloy, including 1.0% Si, 0.5% Fe, 0.15% Cu, 0.4% Mn, 0.1% Cr, and 0.5% Mg in the mass percentage of the total product , 0.25% Zn;

[0024] 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 comple...

Embodiment 2

[0029] A high-strength aluminum alloy, by mass percentage, including 1.3% Si, 0.4% Fe, 0.28% Cu, 0.7% Mn, 0.08% Cr, 0.8% Mg, 0.2% Zn, 1.1% Cr, 0.3% N, 1.59% Rb, 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.

[0030] The present invention also provides a method for preparing the high-strength aluminum alloy, adding AlCrN and RbH in a composite treatment, including the following steps:

[0031] Step 1: Prepare materials according to the components of the high-strength aluminum alloy, including 1.3% Si, 0.4% Fe, 0.28% Cu, 0.7% Mn, 0.08% Cr, and 0.8% Mg in the mass percentage of the total product , 0.2% Zn;

[0032]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 complete...

Embodiment 3

[0037] A high-strength aluminum alloy, by mass percentage, including 1.7% Si, 0.3% Fe, 0.4% Cu, 1.0% Mn, 0.06% Cr, 1.2% Mg, 0.18% Zn, 1.5% Cr, 0.40% N, 2.45% Rb, 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.

[0038] The present invention also provides a method for preparing the high-strength aluminum alloy, adding AlCrN and RbH in a composite treatment, including the following steps:

[0039] Step 1: Prepare materials according to the components of the high-strength aluminum alloy, including 1.0-1.7% of Si in the mass percentage of the total product, less than or equal to 0.5% of Fe, 0.15-0.4% of Cu, 0.4-1.0% of Mn, less than Equal to 0.1% Cr, 0.5-1.2% Mg, less than or equal to 0.25% Zn;

[0040] Step 2: Add aluminum ingots or molten aluminum into the smelting furnace first, heat it to melt it completely, add...

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Abstract

The invention discloses a high-strength aluminum alloy added with AlCrN and RbH and a preparation method of the aluminum alloy. The method comprises the following steps of: heating aluminum ingots or molten aluminum till complete melting; adding Si, Fe, Cu, Mn, Mg, Zn and Ti, and completely dissolving and melting the elements; preserving the heat at the temperature of between 700 and 1,000 DEG C after refining, and obtaining an alloy melt; performing degassing purification operation on the alloy melt by using nitrogen or inert gas or mixed gas of the nitrogen and the inert gas in a random ratio, and continuously introducing the gas till the reaction is finished; adding AlCrN and RbH powder into the alloy melt in a fluidized form together with the gas; stirring to make the AlCrN and the RbH distributed uniformly in the alloy melt and fully reacted with the alloy melt; and standing, regulating the temperature to 680-730 DEG C, and discharging the molten alloy for casting. By the method,the defects of the properties of the conventional aluminum alloy can be overcome, the toughness, the forming property and the hardening capacity of the aluminum alloy are improved, and a high-end base material is provided for efficient deep processing.

Description

technical field [0001] The invention relates to a high-strength aluminum alloy and a preparation method thereof. Background technique [0002] According to statistics, among the more than 500 kinds of deformed aluminum alloy materials in the world, there are less than 20 aluminum alloys commonly used for melting and casting large ingots. Among them, the aluminum alloys most commonly used for melting and casting large ingots and producing thick plates are 5083, 5026, and 6082 , 2017, 2024, 2219, 7075, 7050, etc. Among these materials, 2XXX series and 7XXX series belong to the category of duralumin and super duralumin, and their thick plates are mostly used in the aerospace industry, but their performance in melting and casting large ingots is very poor. Poor, the forming rate of flat ingot and round bar is very low; 5XXX series and 6XXX series alloys have good casting performance, but low strength; other aluminum alloys such as 1XXX series and 3XXX series belong to the catego...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C21/02C22C1/02C22B21/06C22B9/05
Inventor 车云张中可门三泉
Owner GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES
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