A Composite Treatment Method Simultaneously Improving Thermal Conductivity and Mechanical Properties of Die Casting Aluminum Alloy

Abstract

The invention discloses a compound processing method for simultaneously improving heat-conducting and mechanical properties of die casting aluminum alloy. The method comprises the steps of preparing and melting aluminum alloy first, adding Al-B intermediate alloy for B treatment, controlling the processing temperature between 700 and 730 DEG C, mixing until alloy components are uniform, standing and insulating, and controlling the weight percent of the B element to be 0.03 to 0.15% of the total weight of the alloy; adding Al-Sr and Al-Re intermediate alloy to melt for compound modification treatment, controlling the processing temperature between 680 and 720 DEG C, mixing until the alloy components are uniform, standing and insulating, and controlling the weight percent of the Sr element to be 0.03 to 0.2% of the total weight of the alloy; and performing refining and deslagging treatment, and discharging for cast forming after slagging off so as to obtain the compound aluminum alloy melt. The compound processing method has the advantages of simple and convenient process, easiness in implementation, easiness in control over the addition and obvious effect, and the heat-conducting and mechanical properties of the die casting aluminum alloy can be simultaneously improved and increased.

Description

Technical field [0001] The invention relates to a composite treatment method for modifying cast aluminum alloys, in particular to a composite treatment method for simultaneously improving the thermal conductivity and mechanical properties of die-cast aluminum alloys. Background technique [0002] With the rapid development of industries such as new energy vehicles, electronic products, and information communications, auto parts, electronic products, and communication devices (such as base station radiators) have increasingly higher requirements for miniaturization, light weight, and integration. Especially with the coming of the 5G communication era, the operating power and heat generation of communication equipment are getting higher and higher, and the heat dissipation per unit volume of equipment is increasing. Therefore, the development and application of high thermal conductivity materials suitable for the communication industry has become the key to improving the heat dissi...

AI Technical Summary

Problems solved by technology

However, the content of Si (0.5-2.0%wt) and Fe (0.2-0.6%wt) in the aluminum alloy prepared by this method is relatively low, which cannot meet the fluidity and mold release requirements of actual die-casting production.

Although many methods have been proposed to improve the thermal conductivity of Al-Si cast aluminum alloys, they have not been able to solve the problem of mutual constraints between the thermal conductivity and mechanical and casting properties of die-casting aluminum alloys.

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