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

Abstract

The invention relates to a novel high-thermal-conductivity die-casting aluminum alloy and a preparation method thereof, and the novel high-thermal-conductivity die-casting aluminum alloy is characterized by comprising the following components in percentage by mass: 1.5-2.5% of Ni, 0.5-1.5% of Fe, 0.5-1.0% of Mg, 0.9-1.8% of Zn, 0.1-0.3% of B, less than 0.3% of other inevitable impurities and the balance of Al. Meanwhile, high tensile strength, good percentage elongation after fracture and high heat conductivity are achieved, the casting performance meets the forming requirement of the thin-wall complex aluminum die casting, the tensile strength meets the requirements of assembly and actual use of the thin-wall complex aluminum die casting, and the heat conductivity meets the requirement that heat dissipation of a high-heat-consumption device shell is continuously improved.

Description

technical field [0001] The invention relates to a novel high thermal conductivity die-casting aluminum alloy, in particular to a novel high thermal conductivity die-casting aluminum alloy for a heat dissipation shell of a high heat consumption device and a preparation method thereof. Background technique [0002] As high-end chips, 5G communication base stations, high-power LED lighting equipment and other high-heat-consuming devices continue to develop in the direction of miniaturization, light weight, and high performance, their power density continues to increase, and the calorific value per unit volume increases. About 55% of the failure of the device is caused by overheating caused by poor heat dissipation. Within a certain temperature range, with the increase of temperature, the failure rate of the device also increases sharply. The heat dissipation problem has become a bottleneck restricting the development and application of high heat dissipation devices. . [0003]...

AI Technical Summary

Problems solved by technology

The thermal conductivity of the above-mentioned high thermal conductivity aluminum alloy is above 240W / m·K, and the tensile strength is above 351MPa. Its thermal conductivity and mechanical properties are relatively high, but the content of eutectic phase formed by the above alloy components is low, and the fluidity of the alloy is difficult. Guaranteed, its castability is poor

In addition, the number of rare earth elements added is large, and the cost of rare earth elements is expensive, which greatly increases the cost of the alloy. At the same time, the alloy in the above patent needs to be thermally deformed and on-line quenched. There are many production processes, high equipment requirements, and the overall production cost is too high. , which is not conducive to the promotion and use of high thermal conductivity aluminum alloys in the field of die casting

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