a doped mg 2 c 3 High-strength aluminum alloy and preparation method thereof

An aluminum alloy, high-strength 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. The effect of grain refinement, strength and hardness improvement

Inactive Publication Date: 2016-12-14
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, 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

[0030] A high-strength aluminum alloy, by mass percentage, including 0.2% Si, 0.35% Fe, 0.1% Cu, 0.1% Mn, 0.1% Cr, 0.1% Zn, 0.1% Ti, 0.8% Mg, 0.6% C, 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.

[0031] The present invention also provides a method for preparing the high-strength aluminum alloy, adding Mg in a composite treatment 2 C 3 , including the following steps:

[0032] 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;

[0033] Step 2: Add aluminum ingots or molten aluminum into the smelting furnace first, heat it to me...

Embodiment 2

[0038] A high-strength aluminum alloy, by mass percentage, including 0.4% Si, 0.3% Fe, 0.08% Cu, 0.08% Mn, 0.06% Cr, 0.07% Zn, 0.05% Ti, 1.3% Mg, 0.97% C, 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.

[0039] The present invention also provides a method for preparing the high-strength aluminum alloy, adding Mg in a composite treatment 2 C 3 , including the following steps:

[0040] 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;

[0041] 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 com...

Embodiment 3

[0046] A high-strength aluminum alloy, by mass percentage, including 0.6% Si, 0.25% Fe, 0.06% Cu, 0.09% Mn, 0.03% Cr, 0.09% Zn, 0.05% Ti, 1.8% Mg, 1.35% C, 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.

[0047] The present invention also provides a method for preparing the high-strength aluminum alloy, adding Mg in a composite treatment 2 C 3 , including the following steps:

[0048] 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;

[0049] 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 formul...

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Abstract

The invention discloses a high-strength aluminum alloy doped with Mg2C3 and a preparation method thereof. Firstly, the aluminum ingot is heated or molten aluminum liquid is completely melted; Si, Fe, Cu, Mg, Cr, Zn, Ti, Mn and C are added. , so that it is completely dissolved and melted; after refining, keep it warm at 700-1000°C to obtain the alloy melt; use nitrogen or inert gas or a mixture of nitrogen and inert gas in any proportion to degas and purify the alloy melt, and continue Ventilate until the reaction is complete; at the same time, add Mg2C3 powder into the alloy melt with the above gas in a fluidized manner; stir to make Mg2C3 evenly distributed in the alloy melt and fully react with the alloy melt; stand still and adjust the temperature At 680-730°C, the alloy liquid is released from the furnace for casting production. The invention can overcome the deficiency of the performance of the existing aluminum alloy, improve its strength, toughness, formability and hardenability, and provide high-end base materials 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] Magnesium is one of the most widely used and most effective alloying elements in wrought aluminum alloys. Its role is mainly to increase the strength of the alloy through solid solution strengthening and forming a series of soluble metal compound strengthening phases with other elements. However, Mg is an active metal at the same time. When it is added to the aluminum alloy melt in the form of a metal ingot, the burning loss is very large, and the generated magnesium oxide forms slag in the alloy, which seriously affects the properties 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. Combi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08C22C1/06
Inventor 车云门三泉张中可
Owner GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES
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