High-thermal-conductivity die-casting aluminum alloy and preparing method thereof

A technology of casting aluminum alloy with high thermal conductivity, which is applied in the field of high thermal conductivity die-casting aluminum alloy. It can solve the problems of low thermal conductivity, low hardness, and inability to improve thermal conductivity, and achieve the effect of uniform color and excellent fluidity.

Inactive Publication Date: 2017-08-08
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if the structure is refined by the modifier, the thermal conductivity of the material in the as-cast state is still low, and most complex large-scale die castings cannot be further improved by heat treatment
NIKKEI MC ALUMINUM comp

Method used

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  • High-thermal-conductivity die-casting aluminum alloy and preparing method thereof
  • High-thermal-conductivity die-casting aluminum alloy and preparing method thereof
  • High-thermal-conductivity die-casting aluminum alloy and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Weigh the ingredients according to the total weight of 8Kg, prepare 6.84Kg aluminum block, 0.04Kg magnesium block, 0.4Kg aluminum-silicon alloy AlSi20, 0.48Kg aluminum-iron alloy AlFe10, 0.4Kg aluminum-nickel alloy AlNi10, 0.08Kg aluminum-strontium alloy AlSr10.

[0039] 2. Preheat the crucible. When the temperature reaches above 300°C, add aluminum block and magnesium block to melt in sequence. When the temperature rises above 780°C, add aluminum-silicon alloy, aluminum-iron alloy, and aluminum-nickel alloy to keep the temperature at 680-850°C. Within ℃, adjust the temperature of the solution to within 680-700 ℃ after the added material melts, then add Al-10Sr master alloy, and refine with general-purpose aluminum alloy refining agent for 15 minutes. After refining, remove the solvent and scum on the liquid surface. Then stand still for 10 minutes to make the inclusions fully float or sink, and remove the slag.

[0040] 3. After adjusting the solution to 680-720°C,...

Embodiment 2

[0042] 1. Weigh the ingredients according to the total weight of 8Kg, prepare 5.864Kg aluminum block, 0.096Kg magnesium block, 0.2Kg aluminum-silicon alloy AlSi20, 0.24Kg aluminum-iron alloy AlFe10, 1.6Kg aluminum-nickel alloy AlNi10, 0.048Kg aluminum-strontium alloy AlSr10.

[0043] 2. Preheat the crucible. When the temperature reaches above 300°C, add aluminum block and magnesium block to melt in sequence. When the temperature rises above 780°C, add aluminum-silicon alloy, aluminum-iron alloy, and aluminum-nickel alloy to keep the temperature at 680-850°C. Within ℃, adjust the temperature of the solution to within 680-700 ℃ after the added material melts, then add Al-10Sr master alloy, and refine with general aluminum alloy refining agent for 12min. After refining, remove the solvent and scum on the liquid surface. Then stand still for 8 minutes to make the inclusions fully float or sink, and remove the slag.

[0044] 3. After adjusting the solution to 680-720°C, pour the mol...

Embodiment 3

[0046] Step 1 Weigh the ingredients according to the total weight of 8Kg, and prepare 6.312Kg of aluminum block, 0.064Kg of magnesium block, 0.12Kg of aluminum-silicon alloy AlSi20, 0.64Kg of aluminum-iron alloy AlFe10, 0.8Kg of aluminum-nickel alloy AlNi10, and 0.064Kg of aluminum-strontium alloy AlSr10.

[0047] Step 2: Preheat the crucible. When the temperature reaches above 300°C, add aluminum block and magnesium block to melt in turn. When the temperature rises above 780°C, add aluminum-silicon alloy, aluminum-iron alloy, and aluminum-nickel alloy to keep the temperature at 680~ Within 850°C, adjust the temperature of the solution to within 680-700°C after the added material is melted, then add Al-10Sr master alloy, and refine with general aluminum alloy refining agent for 20min. After refining, remove the solvent and scum on the liquid surface. Then stand still for 15 minutes to make the inclusions fully float or sink, and remove the slag.

[0048] Step 3: After adjusti...

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Abstract

The invention provides a high-thermal-conductivity die-casting aluminum alloy. The high-thermal-conductivity die-casting aluminum alloy comprises, by mass percentage, 0.05%-1.0% of silicon, 0.3%-1. 3% of iron, 0.2%-2.0% of nickel, 0.1%-1.2% of magnesium, 0.001%-0.15% of strontium and the balance aluminum and inevitable impurities, wherein the mass percentage of the impurities is smaller than 0.2%. The invention further provides a preparing method of the high-thermal-conductivity die-casting aluminum alloy. The preparing method comprises the steps that at different heating temperatures, the aluminum and magnesium, an aluminum silicon intermediate alloy, a ferro-aluminium intermediate alloy, a nickel-aluminum intermediate alloy and an aluminum strontium intermediate alloy are sequentially fused to obtain aluminum, silicon, iron, nickel, magnesium and strontium fusion; then refined treatment and slag removal treatment are carried out to obtain an aluminum alloy solution; and the temperature of the aluminum alloy solution is adjusted to be 680 DEG C to 720 DEG C, and then casting can be carried out. The high-thermal-conductivity die-casting aluminum alloy has the excellent casting performance and has the higher heat conductivity coefficient.

Description

technical field [0001] The invention relates to a high thermal conductivity die-casting aluminum alloy, which belongs to the technical field of metal materials. Background technique [0002] With the development of modern industry, the heat dissipation of electronics, communications, aerospace and automobile industries is increasing, and the requirements for the thermal conductivity of materials are getting higher and higher. The performance of traditional metal materials can no longer meet the needs of practical applications. Research and development are applicable Aluminum alloy materials with high thermal conductivity for die casting have important application value. Aluminum-silicon alloys and aluminum-magnesium alloys have excellent casting properties. However, the thermal conductivity is generally not high. At present, the mainstream die-casting aluminum alloys such as ADC12 can achieve a thermal conductivity of about (96-110) W / (m.K) in the as-cast state. The therma...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C21/00C22C21/08C22C1/03C22C1/06
CPCC22C1/03C22C1/06C22C21/00C22C21/02C22C21/08C22C1/026
Inventor 刘金
Owner ZTE CORP
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