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High-toughness high-heat-conduction die-casting aluminum alloy and preparing method thereof

A cast aluminum alloy, high thermal conductivity technology, applied in the field of metal materials, can solve the problems of low toughness, unable to meet the comprehensive performance requirements at the same time, unable to meet the performance requirements of high toughness and high thermal conductivity of electronic product structural parts, etc. Toughness, avoid rapid decline, improve the effect of alloy strength

Active Publication Date: 2020-06-23
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing aluminum alloys cannot meet the comprehensive performance requirements of electronic product structural parts such as high toughness and high thermal conductivity.
For example, the patent document CN104264017A discloses a die-casting aluminum alloy material. By adding Co, Ti, and B elements to the eutectic aluminum-silicon alloy, the thermal conductivity of the alloy reaches 190W / (m·K), but the elongation of the alloy is less than 4%, low toughness, unable to meet the performance requirements of high toughness and high thermal conductivity of structural parts of electronic products at the same time

Method used

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  • High-toughness high-heat-conduction die-casting aluminum alloy and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 20 kilograms of Al-5Ce-0.45Mg-0.05Cu high toughness and high thermal conductivity die-casting aluminum alloy (that is, the composition content of the aluminum alloy is: 5wt.% Ce, 0.45wt.% Mg, 0.05wt.% Cu, the rest is Al element and unavoidable impurity element) and its preparation method.

[0030] (1) Raw materials: use pure aluminum ingot as the raw material of Al element in the alloy, use pure magnesium ingot as the raw material of Mg element in the alloy, use Al-Cu master alloy as the raw material of Cu element in the alloy, and use Al-Ce master alloy as the raw material of the alloy The raw material of Ce element.

[0031] (2) Preheating: Use industrial alcohol to clean pure aluminum ingots, pure magnesium ingots, Al-Cu master alloys and Al-Ce master alloys to remove surface oil stains, and then put the raw materials into the crucible furnace for preheating, the preheating temperature is 200~ 250°C, fully remove the moisture present in the raw material.

[0032] (...

Embodiment 2

[0037] 20 kilograms of Al-5La-0.25Mg-0.15Cu high toughness and high thermal conductivity die-casting aluminum alloy (that is, the composition content of the aluminum alloy is: 5wt.% La, 0.25wt.% Mg, 0.15wt.% Cu, the rest is Al element and unavoidable impurity element) and its preparation method.

[0038] (1) Raw materials: use pure aluminum ingot as the raw material of Al element in the alloy, use pure magnesium ingot as the raw material of Mg element in the alloy, use Al-Cu master alloy as the raw material of Cu element in the alloy, and use Al-La master alloy as the raw material of the alloy Raw material of La element.

[0039] (2) Preheating: Use industrial alcohol to clean pure aluminum ingots, pure magnesium ingots, Al-Cu master alloys and Al-La master alloys to remove surface oil stains, and then put the raw materials into the crucible furnace for preheating, the preheating temperature is 200~ 250°C, fully remove the moisture present in the raw material.

[0040] (3) M...

Embodiment 3

[0045] 20 kilograms of Al-6La-0.45Mg-0.05Cu high toughness and high thermal conductivity die-casting aluminum alloy (that is, the composition content of the aluminum alloy is: 6wt.% La, 0.45wt.% Mg, 0.05wt.% Cu, the rest is Al element and unavoidable impurity element) and its preparation method.

[0046] (1) Raw materials: use pure aluminum ingot as the raw material of Al element in the alloy, use pure magnesium ingot as the raw material of Mg element in the alloy, use Al-Cu master alloy as the raw material of Cu element in the alloy, and use Al-La master alloy as the raw material of the alloy Raw material of La element.

[0047] (2) Preheating: Use industrial alcohol to clean pure aluminum ingots, pure magnesium ingots, Al-Cu master alloys and Al-La master alloys to remove surface oil stains, and then put the raw materials into the crucible furnace for preheating, the preheating temperature is 200~ 250°C, fully remove the moisture present in the raw material.

[0048] (3) M...

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Abstract

The invention discloses a high-toughness high-heat-conduction die-casting aluminum alloy and a preparing method thereof. The aluminum alloy comprises, by weight percent, 3 to 7% of RE, 0.01 to 1% of Mg, 0.01 to 1% of Cu and the balance Al and inevitable impurities. The impurities comprise Fe with the total amount smaller than 0.1%, the RE comprises one or combination of two of Ce and La, a pure aluminum ingot, a pure magnesium ingot, an Al-Cu intermediate alloy and an Al-RE intermediate alloy are taken as raw materials, the preparing process of the aluminum alloy is pressure casting, the prepared alloy can keep the higher heat conduction property while the alloy has the high toughness, and the alloy is suitable for preparing a die casting structure part of an electronic product in a complex shape.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a die-casting aluminum alloy with high toughness and high thermal conductivity and a preparation method thereof. Background technique [0002] Die-casting aluminum alloy has the advantages of low density, high specific strength, and good thermal conductivity, and is widely used in the production of structural parts in electronic products such as CPU radiators, camera casings, mobile phone mid-boards, and notebook panels. However, under the trend of thinner and lighter electronic products, higher integration and higher power consumption of electronic devices, higher requirements are placed on the performance of die-casting aluminum alloys. On the one hand, die-casting aluminum alloys should have high toughness to produce complex and thin-walled structural parts. On the other hand, the die-casting aluminum alloy should have high thermal conductivity, so as to dissipate the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/03B22D17/00C22F1/04
CPCC22C21/00C22C1/026C22C1/03B22D17/00C22F1/04
Inventor 李德江权北北曾小勤应韬
Owner SHANGHAI JIAO TONG UNIV