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Novel high-thermal-conductivity die-casting aluminum alloy material and preparing method thereof

A technology of casting aluminum alloy and high thermal conductivity is applied in the field of new die-casting aluminum alloy materials and their preparation, which can solve the problems of inability to meet the heat dissipation requirements of new energy vehicle motor casings, poor heat dissipation effect, and complicated processes, and achieve high thermal conductivity. performance, improve heat dissipation efficiency, and optimize the effect of process paths

Inactive Publication Date: 2018-09-18
SHANDONG HUAYU ALUMINUM & POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the traditional motor housings are steel castings or machined parts, which are complex in process, heavy in weight, high in cost and poor in heat dissipation
[0003] Die-casting aluminum alloys have the advantages of good formability, low production cost, and high production efficiency when used to produce shell parts, and are in line with the current trend of lightweight automobiles, but the thermal conductivity of conventional die-casting aluminum alloys is usually 90-110W / (m· K) cannot meet the heat dissipation requirements of the new energy vehicle motor housing, so the market urgently needs die-casting aluminum alloys with good mechanical properties and excellent thermal conductivity

Method used

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  • Novel high-thermal-conductivity die-casting aluminum alloy material and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The high thermal conductivity die-cast aluminum-zinc alloy of this embodiment is prepared by the following method:

[0043] Ingredients: Prepare pure aluminum (Al ≥ 99.7%), aluminum-silicon master alloy (Si 18.0-22.0%), pure magnesium (Mg ≥ 99.9%), iron additives (75% Fe content in iron powder) according to the above alloy components , and the rest are co-solvents. Therefore, when burning loss is not considered, iron should be prepared according to 1.33 times the required Fe content), aluminum-boron master alloy (B2.5-5.5%), aluminum-strontium master alloy (Sr 9.0-11.0 %); drying the above-mentioned raw materials for subsequent use.

[0044]Melting: Put pure aluminum and aluminum-silicon alloy into the melting furnace, heat it to 760°C and melt it. After the temperature drops to 740°C, use a bell jar to press the dried magnesium ingot into the melt to melt it, and control the melt. The temperature is stabilized at 740°C, add the dried iron additive, the dried aluminum-...

Embodiment 2

[0049] The batching and smelting steps of the high thermal conductivity die-casting aluminum alloy prepared in this implementation are the same as in Example 1, and the chemical composition of the alloy obtained by direct-reading spectrometer analysis is (mass fraction, %): Si 9.1%, Fe 0.98%, Mg 0.14%, B0.07%, Sr 0.02%, the balance is Al and impurity elements. Control the temperature of the alloy melt at 650-730°C, and use a 1600-ton die-casting machine to produce a batch of motor housing parts. Randomly select 3 motor casings to test the thermal conductivity at 5 locations, the average value is 153W / (m·K), take tensile samples from 3 locations randomly, and measure the average yield strength of 127MPa.

[0050] The above two examples show that the high thermal conductivity die-casting aluminum alloy of the present invention has excellent thermal conductivity and mechanical properties, and it still has excellent thermal conductivity (153W / (m·K)) and mechanical properties ( 12...

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Abstract

The invention relates to a novel high-thermal-conductivity die-casting aluminum alloy material. The novel high-thermal-conductivity die-casting aluminum alloy material comprises the components including, by mass percent, 8.0%-10.0% of Si, 0.6%-1.0% of Fe, 0.1%-0.6% of Mg, 0.05%-0.3% of B, 0.01%-0.04% of Sr and the balance Al and impurity elements. According to the high-thermal-conductivity die-casting aluminum alloy material, through the scientific and reasonable alloy composition design, on the premise that the die-casting forming performance is guaranteed, expensive rare earth metallic elements do not need to be added, no heat treatment working procedures need to be added, the heat-conducting property can be greatly improved compared with that of conventional die-casting aluminum alloyssuch as ADC12, and a pressure casting has the good heat-conducting property and comprehensive mechanical property, and the follow-up machining is facilitated.

Description

technical field [0001] The invention relates to a novel die-casting aluminum alloy material with excellent thermal conductivity and mechanical properties and a preparation method thereof, belonging to the field of non-ferrous metal materials and their preparation and forming. Background technique [0002] As the key component of the motor module of new energy vehicles, the motor shell has excellent mechanical strength which is a necessary condition to ensure the safe and efficient operation of the motor. At the same time, the running motor will generate a certain amount of heat due to friction. The body has good heat dissipation performance. Most of the traditional motor housings are steel castings or machined parts, which are complex in process, heavy in weight, high in cost and poor in heat dissipation. [0003] Die-casting aluminum alloys have the advantages of good formability, low production cost, and high production efficiency when used to produce shell parts, and are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/03
CPCC22C1/026C22C1/03C22C21/02
Inventor 王际海周玉立高喜柱邹纯刘金星钟鼓徐杰张保存李德杰吕秀春吴敏
Owner SHANDONG HUAYU ALUMINUM & POWER