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Alloy aluminum rod containing rare earth elements and preparation process thereof

A technology of rare earth elements and preparation process, which is applied in the field of alloy aluminum rods containing rare earth elements and its preparation technology, can solve the problems of low tensile performance and low elongation of alloy aluminum rods, achieve pinhole defect improvement, and improve thermal stability , The effect of refining dendrite network cell organization

Active Publication Date: 2019-09-10
广西平果铝合金精密铸件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an alloy aluminum rod containing rare earth elements and its preparation process, so as to solve the technical problems of low tensile properties and elongation of alloy aluminum rods existing in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An alloy aluminum rod containing rare earth elements, the alloy aluminum rod includes the following components in weight percentage: Mg1.5%, Si0.7%, Cu1.0%, Fe0.04%, Mn0.35%, Ni0. 2%, Ti0.07%, Y0.15%, Er0.07%, Gd0.05%, La0.07%, the total amount of impurity elements of other metals and non-metals does not exceed 0.5%, and the balance is aluminum.

[0029] The aluminum used is pure aluminum with a purity of 99.8%.

[0030] A preparation process for alloy aluminum rods containing rare earth elements, comprising the following steps:

[0031] Melting: Put the aluminum ingot into the melting furnace and raise the temperature to 710°C for melting;

[0032] Alloying: Add Mg, Si, Cu, Fe, Mn, Ni, Ti elements into the smelting furnace, heat to 750 ° C, and keep it warm for 30 minutes, stir and vibrate the molten metal with a graphite rod, discharge the gas in the molten metal, and dissolve the aluminum The slag on the surface of the alloy liquid is removed.

[0033]Refining: Ad...

Embodiment 2

[0038] An alloy aluminum rod containing rare earth elements, the alloy aluminum rod includes the following components in weight percentage: Mg2.6%, Si0.9%, Cu1.3%, Fe0.7%, Mn0.5%, Ni0. 42%, Ti0.1%, Y0.22%, Er0.08%, Gd0.087%, La0.16%, the total amount of impurity elements of other metals and non-metals does not exceed 0.5%, and the balance is aluminum.

[0039] The aluminum used is pure aluminum with a purity of 99.8%.

[0040] A preparation process for alloy aluminum rods containing rare earth elements, comprising the following steps:

[0041] Melting: put the aluminum ingot into the melting furnace and raise the temperature to 720°C for melting;

[0042] Alloying: Add Mg, Si, Cu, Fe, Mn, Ni, Ti elements into the smelting furnace, heat to 778°C, and keep it warm for 30 minutes, stir and vibrate the molten metal with a graphite rod, discharge the gas in the molten metal, and dissolve the aluminum The slag on the surface of the alloy liquid is removed.

[0043] Refining: Adju...

Embodiment 3

[0048] An alloy aluminum rod containing rare earth elements, the alloy aluminum rod includes the following components in weight percentage: Mg3.3%, Si1.1%, Cu1.7%, Fe0.1%, Mn1.5%, Ni0. 6%, Ti0.12%, Y0.3%, Er0.1%, Gd0.11%, La0.24%, the total amount of impurity elements of other metals and non-metals does not exceed 0.5%, and the balance is aluminum.

[0049] The aluminum used is pure aluminum with a purity of 99.8%.

[0050] A preparation process for alloy aluminum rods containing rare earth elements, comprising the following steps:

[0051] Melting: put the aluminum ingot into the melting furnace and raise the temperature to 735°C for melting;

[0052] Alloying: Add Mg, Si, Cu, Fe, Mn, Ni, Ti elements into the smelting furnace, heat to 790 ° C, and keep it warm for 30 minutes, stir and vibrate the molten metal with a graphite rod, discharge the gas in the molten metal, and dissolve the aluminum The slag on the surface of the alloy liquid is removed.

[0053] Refining: Adjus...

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Abstract

The invention discloses an alloy aluminum rod containing rare earth elements and a preparation process thereof, and belongs to the field of preparation of aluminum alloy materials. The alloy aluminumrod comprises the following components of, in percentage by weight, 1.5%-3.3% of Mg, 0.7%-1.1% of Si, 1.0%-1.7% of Cu, 0.04%-0.1% of Fe, 0.35%-0.7% of Mn, 0.2%-0.6% of Ni, 0.07 %-0.12% of Ti, 0.15%-0.3% of Y, 0.07%-0.1% of Er, 0.05%-0.11% of Gd, 0.07%-0.24% of La, not more than 0.5% of impurity elements of other metals and nonmetals, and the balance Al. The alloy aluminum rod is prepared through the steps of melting, alloying, refining, ingot casting, homogenization treatment, extrusion molding and the like. By adding the rare earth elements, the dendritic crystal web cell structure can be refined, iron with needle-like structure in aluminum liquid can be transformed into particles, so that the corrosion resistance and mechanical properties of the aluminum rod are improved and the surfaceroughness of aluminum alloy parts prepared by the aluminum rod are reduced. The alloy aluminum rod prepared by the method has high strength, high plasticity, excellent corrosion resistance, no tendency of exfoliation corrosion, stress corrosion and intergranular corrosion, good processing and welding performance, is suitable for manufacturing automobile parts, and has excellent industrial application value.

Description

technical field [0001] The invention relates to the field of preparation of aluminum alloy materials, in particular to an alloy aluminum rod containing rare earth elements and a preparation process thereof. Background technique [0002] Aluminum alloys are widely used in automobiles, machinery, aerospace and other fields due to their high cost performance, beautiful shape, good plasticity, high specific strength, good corrosion resistance, and strong processability. Aluminum rods are a type of intermediate product used in a large amount in aluminum alloys. In the traditional preparation process, some defects are prone to occur during the smelting process, such as slag inclusions and pores. These defects easily lead to the decrease of tensile strength and plasticity of the alloy aluminum rod in the later extrusion process, making the processed aluminum alloy products become waste products due to cracks, extrusion dark lines, granular burrs, etc., thereby reducing the aluminum...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C1/02C22C1/06C22F1/047
CPCC22C1/026C22C1/06C22C21/08C22F1/047
Inventor 梁春才
Owner 广西平果铝合金精密铸件有限公司
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