A kind of ultra-high thermal conductivity, high plasticity, medium-strength aluminum alloy and preparation method thereof

Abstract

The invention discloses a medium-strength aluminum alloy with ultra-high thermal conductivity and high plasticity and a preparation method thereof. The mass percentage of each component of the aluminum alloy is: Cu 0.5-1.5%, Fe 1.0-2.5%, Mg 0.03-0.15%, Si 0.05-0.5%, the rest are Al and inevitable impurities; and the total amount of unavoidable impurity elements is less than 0.2%, and the Fe / Cu mass ratio in the aluminum alloy is (1-4):1. The thermal conductivity of the aluminum alloy in the as-cast state is 204-217W / (m.K), the tensile strength is 166-227MPa, the yield strength is 100-121MPa, and the elongation is 18-29%; the aluminum alloy of the present invention has high thermal conductivity, good mechanical properties, casting It has excellent performance and is an ideal material for preparing castings with high thermal conductivity requirements, and is suitable for production by die casting, semi-solid rheological forming, liquid die forging and other processes, and has a wide range of applications.

Description

technical field

[0001] The invention relates to the technical field of aluminum alloys, in particular to a medium-strength aluminum alloy with ultrahigh thermal conductivity and high plasticity and a preparation method thereof. Background technique

[0002] With the rapid development of national key industries such as 5G communications and new energy vehicles, their structural components are developing in the direction of integration and thinning, and the operating power density and calorific value of equipment are getting higher and higher, which poses severe challenges to system and equipment heat dissipation. According to reports, most of the failure causes of electronic and communication products are caused by overheating and heat-related problems. Due to its light weight, corrosion resistance, and excellent thermal conductivity, aluminum alloys are widely used in parts that require high thermal conductivity, such as chassis shells and filter shells for 5G base stations,...

Examples

Embodiment 1

[0038] An ultra-high thermal conductivity and high plasticity medium-strength aluminum alloy of this embodiment consists of the following specific components and mass percentages: Cu 1.0%, Fe 1.5%, Mg 0.05wt.%, Si 0.1wt.%, Ni 0.01%, Ti 0.002 %, Zn 0.01%, Mn 0.01%, Fe / Cu mass ratio is 1.5, the Si+Ni+Mn+Zn mass fraction is 0.13%, the rest is Al and unavoidable impurities, the total amount of impurity elements is 0.14%;

[0039] The present invention provides a method for preparing the above-mentioned ultra-high thermal conductivity and high plasticity medium-strength aluminum alloy, comprising the following steps:

[0040] (1) Melting: Heat the melting furnace to 720°C, put the aluminum ingot into the melting furnace to melt, after the aluminum ingot is completely melted, add Cu and Fe pure metals or their intermediate alloys into the aluminum melt according to the composition ratio, After it dissolves, add instant silicon, Al-Ni master alloy, Al-Ti master alloy, Al-Mn master al...

Embodiment 2

[0045] An ultra-high thermal conductivity and high plasticity medium-strength aluminum alloy of this embodiment consists of the following specific components and mass percentages: Cu 1.5%, Fe 2.0%, Mg 0.1wt.%, Si 0.15wt.%, Ti 0.002%, Zn 0.03 %, Mn 0.02%, Fe / Cu mass ratio is 1.3, the Si+Ni+Mn+Zn mass fraction is 0.2%, the rest is Al and unavoidable impurities, the total amount of impurity elements is 0.16%;

[0046]The present invention provides a method for preparing the above-mentioned ultra-high thermal conductivity and high plasticity medium-strength aluminum alloy, comprising the following steps:

[0047] (1) Melting: Heat the melting furnace to 720°C, put the aluminum ingot into the melting furnace to melt, after the aluminum ingot is completely melted, add Cu and Fe pure metals or their intermediate alloys into the aluminum melt according to the composition ratio, After it dissolves, add instant silicon, Al-Ti master alloy, Al-Mn master alloy, pure Zn and pure Mg accordi...

Embodiment 3

[0052] An ultra-high thermal conductivity and high plasticity medium-strength aluminum alloy of this embodiment consists of the following specific components and mass percentages: Cu 0.6%, Fe 2.4%, Mg 0.05wt.%, Si 0.2wt.%, Ni 0.02%, Zn 0.02 %, Mn 0.02%, Fe / Cu mass ratio is 4, the Si+Ni+Mn+Zn mass fraction is 0.26%, the rest is Al and unavoidable impurities, the total amount of impurity elements is 0.16%;

[0053] The present invention provides a method for preparing the above-mentioned ultra-high thermal conductivity and high plasticity medium-strength aluminum alloy, comprising the following steps:

[0054] (1) Melting: Heat the melting furnace to 740°C, put the aluminum ingot into the melting furnace to melt, after the aluminum ingot is completely melted, add Cu and Fe pure metals or their intermediate alloys into the aluminum melt according to the composition ratio, After it dissolves, add instant silicon, Al-Ni master alloy, Al-Mn master alloy, pure Zn and pure Mg accordin...

technical field

[0001] The invention relates to the technical field of aluminum alloys, in particular to a medium-strength aluminum alloy with ultrahigh thermal conductivity and high plasticity and a preparation method thereof. Background technique

[0002] With the rapid development of national key industries such as 5G communications and new energy vehicles, their structural components are developing in the direction of integration and thinning, and the operating power density and calorific value of equipment are getting higher and higher, which poses severe challenges to system and equipment heat dissipation. According to reports, most of the failure causes of electronic and communication products are caused by overheating and heat-related problems. Due to its light weight, corrosion resistance, and excellent thermal conductivity, aluminum alloys are widely used in parts that require high thermal conductivity, such as chassis shells and filter shells for 5G base stations,...

Examples

Embodiment 1

[0038] An ultra-high thermal conductivity and high plasticity medium-strength aluminum alloy of this embodiment consists of the following specific components and mass percentages: Cu 1.0%, Fe 1.5%, Mg 0.05wt.%, Si 0.1wt.%, Ni 0.01%, Ti 0.002 %, Zn 0.01%, Mn 0.01%, Fe / Cu mass ratio is 1.5, the Si+Ni+Mn+Zn mass fraction is 0.13%, the rest is Al and unavoidable impurities, the total amount of impurity elements is 0.14%;

[0039] The present invention provides a method for preparing the above-mentioned ultra-high thermal conductivity and high plasticity medium-strength aluminum alloy, comprising the following steps:

[0040] (1) Melting: Heat the melting furnace to 720°C, put the aluminum ingot into the melting furnace to melt, after the aluminum ingot is completely melted, add Cu and Fe pure metals or their intermediate alloys into the aluminum melt according to the composition ratio, After it dissolves, add instant silicon, Al-Ni master alloy, Al-Ti master alloy, Al-Mn master al...

Embodiment 2

[0045] An ultra-high thermal conductivity and high plasticity medium-strength aluminum alloy of this embodiment consists of the following specific components and mass percentages: Cu 1.5%, Fe 2.0%, Mg 0.1wt.%, Si 0.15wt.%, Ti 0.002%, Zn 0.03 %, Mn 0.02%, Fe / Cu mass ratio is 1.3, the Si+Ni+Mn+Zn mass fraction is 0.2%, the rest is Al and unavoidable impurities, the total amount of impurity elements is 0.16%;

[0046]The present invention provides a method for preparing the above-mentioned ultra-high thermal conductivity and high plasticity medium-strength aluminum alloy, comprising the following steps:

[0047] (1) Melting: Heat the melting furnace to 720°C, put the aluminum ingot into the melting furnace to melt, after the aluminum ingot is completely melted, add Cu and Fe pure metals or their intermediate alloys into the aluminum melt according to the composition ratio, After it dissolves, add instant silicon, Al-Ti master alloy, Al-Mn master alloy, pure Zn and pure Mg accordi...

Embodiment 3

[0052] An ultra-high thermal conductivity and high plasticity medium-strength aluminum alloy of this embodiment consists of the following specific components and mass percentages: Cu 0.6%, Fe 2.4%, Mg 0.05wt.%, Si 0.2wt.%, Ni 0.02%, Zn 0.02 %, Mn 0.02%, Fe / Cu mass ratio is 4, the Si+Ni+Mn+Zn mass fraction is 0.26%, the rest is Al and unavoidable impurities, the total amount of impurity elements is 0.16%;

[0053] The present invention provides a method for preparing the above-mentioned ultra-high thermal conductivity and high plasticity medium-strength aluminum alloy, comprising the following steps:

[0054] (1) Melting: Heat the melting furnace to 740°C, put the aluminum ingot into the melting furnace to melt, after the aluminum ingot is completely melted, add Cu and Fe pure metals or their intermediate alloys into the aluminum melt according to the composition ratio, After it dissolves, add instant silicon, Al-Ni master alloy, Al-Mn master alloy, pure Zn and pure Mg accordin...

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