High-heat-conductivity low-density die-cast aluminum silicon rare-earth alloy

Abstract

The invention relates to the technical field of aluminum alloys, and particularly provides a die-cast aluminum silicon rare-earth alloy which comprises 10.1-15.0 wt% of Si, 0.1-1.0 wt% of rare earth (Ce or La or Ce-La mixture), one or two or three or four additives A and the balance of Al and inevitable impurities. When the number of the additives A is one, the mass content is 0.3-2.0%; and when the number of the additives A is two or three or four, the mass content of each additive is 0.2-1.5%. The additives A can be Fe, Ni, Mn, Mg or mixture thereof. The die-cast aluminum silicon rare-earth alloy has the advantages of favorable heat-conducting property, low density, favorable flowability, favorable die casting performance, easy subsequent finish machining of die casting, high efficiency, high speed, no residual waste slag and high yield, and is a preferable die-cast aluminum alloy for radiators with excellent comprehensive properties.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, and specifically provides a die-cast aluminum-silicon rare-earth alloy. Background technique [0002] Aluminum alloys are widely used in communication, lighting, digital products heat conduction, heat dissipation and cooling fields, such as communication casings, LED lamp radiators, computer CPU heat sinks, router casings, etc. Aluminum alloys used for heat dissipation devices in the prior art mainly include Al-Si and Al-Mg series. [0003] Al-Si alloys are currently the most widely used die-casting aluminum alloys, and the most widely used one is ADC12 aluminum alloy. Its disadvantage is poor thermal conductivity, and the thermal conductivity is lower than 90W / M.K. [0004] Al-Mg series alloys have good thermal conductivity, and the most widely used ones are 6063\6061, but this alloy can only be used for extruded profiles, and it cannot be mass-produced with complex structural parts by ...

AI Technical Summary

Problems solved by technology

[0003] Al-Si alloys are currently the most widely used die-casting aluminum alloys, and the most widely used one is ADC12 aluminum alloy. Its disadvantage is poor thermal conductivity, and the thermal conductivity is lower than 90W / M.K

[0004] Al-Mg series alloys have good thermal conductivity, and the most widely used ones are 6063\6061, but this alloy can only be used for extruded profiles, and cannot be mass-produced with complex structural parts by die-casting technology