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Pressure cast rare earth aluminum alloy with high thermal conductivity and high electrical conductivity and preparing method thereof

A technology with high electrical conductivity and high thermal conductivity, applied in the field of metal materials, can solve problems such as unsatisfactory application requirements, general mechanical properties, poor thermal conductivity, and poor electrical conductivity, and achieve the effect of reducing sticking, excellent electrical conductivity, and good corrosion resistance

Inactive Publication Date: 2015-12-23
GAOAN JINLIANGXUAN SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of alloy has excellent die-casting performance, but its mechanical properties are average, its thermal conductivity and electrical conductivity are poor, its thermal conductivity generally does not exceed 100W / m.k, and its electrical conductivity is about 15ms / m. Products, such as lighting, 3C and communication products, automotive transportation and other products, ordinary die-casting aluminum alloys can no longer meet the application requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Pure aluminum (A00 aluminum), aluminum-silicon alloy (AlSi12), aluminum-iron alloy (AlFe10), pure magnesium (99.9), aluminum-copper alloy (Al-50Cu), pure zinc (99.95), aluminum-boron alloy (AlB3), aluminum Manganese (Al-Mn10), pure zinc, magnesium lanthanum cerium (Mg-LaCe), and magnesium yttrium (Mg-25Y) are calculated by batching, smelting and pouring, and the content of the main elements of the final alloy is as follows:

[0039] Si: 0.5wt%,

[0040] Cu: 0.005wt%,

[0041] Fe: 0.32wt%,

[0042] Mn: 0.04wt%,

[0043] Mg: 0.8wt%,

[0044] Zn: 0.08wt%,

[0045] B: 0.005wt%,

[0046] La: 0.098wt%,

[0047] Ce: 0.052wt%,

[0048] Y: 0.05wt%,

[0049] The remainder is Al and impurities not exceeding 0.1 wt%.

[0050] Test room temperature performance as follows:

[0051] σ b (tensile strength) = 221MPa, σ S (yield strength) = 140MPa, δ (elongation) = 17.6%. Thermal conductivity: λ=162w / m.k, electrical conductivity: σ=29.5ms / m.

Embodiment 2

[0053] Pure aluminum (A00 aluminum), aluminum-silicon alloy (AlSi12), aluminum-iron alloy (AlFe10), pure magnesium (99.9), aluminum-copper alloy (Al-50Cu), pure zinc (99.95), aluminum-boron alloy (AlB3), aluminum Manganese (Al-Mn10), pure zinc, magnesium lanthanum cerium (Mg-LaCe), and magnesium yttrium (Mg-25Y) are calculated by batching, smelting and pouring, and the content of the main elements of the final alloy is as follows:

[0054] Si: 1.1wt%,

[0055] Cu: 0.008wt%,

[0056]Fe: 0.52wt%,

[0057] Mn: 0.1wt%,

[0058] Mg: 1.6wt%,

[0059] Zn: 0.10wt%,

[0060] B: 0.009wt%,

[0061] La: 0.126wt%,

[0062] Ce: 0.08wt%,

[0063] Y: 0.09wt%,

[0064] The remainder is Al and impurities not exceeding 0.1 wt%.

[0065] Test room temperature performance as follows:

[0066] σ b (tensile strength) = 238MPa, σ S (yield strength) = 155MPa, δ (elongation) = 16%. Thermal conductivity: λ=146w / m.k, electrical conductivity: σ=25.6ms / m.

Embodiment 3

[0068] Pure aluminum (A00 aluminum), aluminum-silicon alloy (AlSi12), aluminum-iron alloy (AlFe10), pure magnesium (99.9), aluminum-copper alloy (Al-50Cu), pure zinc (99.95), aluminum-boron alloy (AlB3), aluminum Manganese (Al-Mn10), pure zinc, magnesium lanthanum cerium (Mg-LaCe), and magnesium yttrium (Mg-25Y) are calculated by batching, smelting and pouring, and the content of the main elements of the final alloy is as follows:

[0069] Si: 1.6wt%,

[0070] Cu: 0.02wt%,

[0071] Fe: 0.50wt%,

[0072] Mn: 0.25wt%,

[0073] Mg: 2.5wt%,

[0074] Zn: 0.10wt%,

[0075] B: 0.015wt%,

[0076] La: 0.15wt%,

[0077] Ce: 0.09wt%,

[0078] Y: 0.13wt%,

[0079] The remainder is Al and impurities not exceeding 0.1 wt%.

[0080] Test room temperature performance as follows:

[0081] σ b (tensile strength) = 255MPa, σ S (yield strength) = 168MPa, δ (elongation) = 12.3%. Thermal conductivity: λ=134w / m.k, electrical conductivity: σ=23.9ms / m.

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Abstract

The invention discloses pressure cast rare earth aluminum alloy with high thermal conductivity and high electrical conductivity and a preparing method thereof. The aluminum alloy comprises 0.5-2.0 wt% of Si, 0.001-0.05 wt% of Cu, 0.2-0.6 wt% of Fe, 0.001-0.50 wt% of Mn, 0.8-3.0 wt% of Mg, 0.07-0.15 wt% of Zn, 0.001-0.05 wt% of B, 0.05-0.20 wt% of La, 0.05-0.2 wt% of Y, 0.05-0.2 wt% of Ce, and the balance Al and less than 0.1 wt% of impurities. The aluminum alloy has high castability, excellent thermal conductivity and electrical conductivity, excellent corrosion resistance and medium mechanical performance and can be applied to 3C mobile phones, notebook computer shells, communication, illumination, rail transit, civil hardware and other fields.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a die-casting rare earth aluminum alloy with high thermal conductivity and high electrical conductivity and a preparation method thereof. Background technique [0002] Aluminum alloy is an alloy composed of aluminum as the base and other elements. It is the most commonly used material in structural engineering. It has the characteristics of small specific gravity, good heat transfer, good electrical conductivity, environmental protection, and recyclable recycling. It is widely used in 3C , automotive transportation, home furnishing, aerospace, chemical and rocket and other fields. [0003] Among the existing die-casting (casting) aluminum alloys, the most common ones are aluminum-silicon alloys and aluminum-silicon-copper alloys, among which aluminum-silicon alloys account for the majority. This type of alloy has excellent die-casting performance, but its mechanical prop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C21/08C22C1/03C22C1/06
Inventor 李良喜
Owner GAOAN JINLIANGXUAN SCI & TECH
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