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CuH-doped 6181 aluminum alloy and smelting and casting method thereof

An aluminum alloy and alloy technology, applied in the field of high-strength aluminum alloys, can solve the problems of increased tensile strength and elongation, decreased tensile strength and elongation, and reduced service life of parts, and achieves improved strength and hardness, thermal conductivity, etc. Good properties and the effect of enhancing the strength of the alloy

Inactive Publication Date: 2013-08-21
GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the ZAlSi7Mg aluminum alloy is quenched and heated to 555°C and the low melting point eutectic begins to melt until 558°C. The mechanical properties increase with the increase of quenching temperature, but due to the obvious overburning characteristics in the 558°C alloy, the tensile strength and elongation The rate decreases accordingly, while the ZAlCu5Mn aluminum alloy quenching heating temperature is from 540 ° C to 550 ° C, its tensile strength and elongation tend to increase, because the low melting point eutectic begins to remelt at 550 ° C, resulting in tensile strength and elongation A sharp decline
When the parts with burnt structure meet the dynamic load, the influence on the mechanical properties is more obvious, and it is easy to form a source of fatigue in the burnt remelted part, reducing the service life of the parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A high-strength aluminum alloy, by mass percentage, including 0.8% Si, 0.45% Fe, 0.1% Mn, 0.1% Cr, 0.6% Mg, 0.2% Zn, 0.1% Ti, 0.9% Cu, 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.

[0028] The present invention also provides a method for preparing the high-strength aluminum alloy, adding CuH in a composite treatment manner, including the following steps:

[0029] Step 1: Prepare materials according to the components of the high-strength aluminum alloy, including 0.8% of Si, 0.45% of Fe, 0.1% of Mn, 0.1% of Cr, 0.6% of Mg, and 0.2% of Zn in the mass percentage of the total product , 0.1% Ti;

[0030] 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 d...

Embodiment 2

[0035] A high-strength aluminum alloy, by mass percentage, including 1.0% Si, 0.35% Fe, 0.09% Mn, 0.08% Cr, 0.8% Mg, 0.1% Zn, 0.08% Ti, 1.5% Cu, 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.

[0036] The present invention also provides a method for preparing the high-strength aluminum alloy, adding CuH in a composite treatment manner, including the following steps:

[0037] Step 1: Prepare materials according to the components of the high-strength aluminum alloy, including 1.0% of Si, 0.35% of Fe, 0.09% of Mn, 0.08% of Cr, 0.8% of Mg, and 0.1% of Zn in the mass percentage of the total product , 0.08% Ti;

[0038] 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 3

[0043] A high-strength aluminum alloy, in terms of mass percentage, including 1.2% Si, 0.3% Fe, 0.05% Mn, 0.05% Cr, 1.0% Mg, 0.12% Zn, 0.07% Ti, 2.0% Cu, 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.

[0044] The present invention also provides a method for preparing the high-strength aluminum alloy, adding CuH in a composite treatment manner, including the following steps:

[0045] Step 1: Prepare materials according to the components of the high-strength aluminum alloy, including 1.2% of Si, 0.3% of Fe, 0.05% of Mn, 0.05% of Cr, 1.0% of Mg, and 0.12% of Zn in the mass percentage of the total product , 0.07% Ti;

[0046] 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 ...

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Abstract

The invention discloses a CuH-doped 6181 aluminum alloy and a smelting and casting method thereof. 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 obtainingan 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 CuH powder into the alloy melt in a fluidized form together with the gas; stirring to make the CuH 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] Due to the coarse second phase particles and eutectic structure in the cast aluminum alloy, as well as the uneven concentration of the components inside the solid solution, various non-metallic inclusions and micro porosity that hinder the diffusion of the second phase, it is determined that the cast aluminum alloy must be Sufficient quenching heating temperature and long holding time are required to maximize the solubility of the strengthening phase in the solid solution, so as to achieve the purpose of quenching and aging strengthening. If the solid solution temperature is low, or the holding time is short, the strengthening phase is not fully dissolved, there are more residual strengthening phases in the microstructure, or the quenching transfer speed is slow, and the cooling rate is not enough, so that the strengthening phase is p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/18C22C1/02C22B21/06C22B9/05
Inventor 车云门三泉张中可
Owner GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES
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