Preparation technology of high-silicon aluminum alloy sheet

Abstract

The invention relates to the field of high-silicon aluminum alloys, in particular to a preparation technology of a high-silicon aluminum alloy sheet. Aluminum and silicon are mixed according to a weight ratio, then the mixture is placed in a medium-frequency induction furnace for smelting, a modifier is added into the alloy, the alloy is subjected to heat preservation for a period of time, ultra-sound is introduced into the alloy, and the cast-rolling is carried out when the cast-rolling temperature is reached. The method is characterized in that the rapid cooling rate and the large supercooling degree provided by the cast-rolling process provide feasibility for producing the high-silicon aluminum alloy sheet. The rapid cooling rate and the deep supercooling degree provided by the cast-rolling process are utilized, so that the high-silicon aluminum alloy sheet which is low in thermal expansion coefficient, high in wear resistance and good in machining performance is produced.

Description

technical field [0001] The invention relates to the field of high-silicon aluminum alloys, in particular to a preparation process for high-silicon aluminum alloy sheets. Background technique [0002] 1 Composition and application of high silicon aluminum alloy [0003] Due to its high thermal conductivity, low thermal expansion coefficient, low density, and good mechanical strength and rigidity, high-silicon aluminum alloys are mainly used in flip-chip packaging, power device packaging, optoelectronic module packaging and wafers, and are expected to Realize the application of new electronic packaging materials in aerospace, optoelectronic devices and other fields. At present, developed countries such as Europe, the United States, and Japan have realized the industrial production and application of aluminum-silicon alloys, and have their own patented technologies. With the rapid development of the electronics industry in recent years, the domestic demand for electronic pack...

AI Technical Summary

Problems solved by technology

[0004] 2 The current preparation methods and disadvantages of high-silicon aluminum alloys

Although the process of smelting and casting is simple, low in cost and easy to produce on a large scale, the primary silicon is excessively coarsened due to its low solidification rate, which seriously affects the mechanical and processing properties of the material, and aluminum with high silicon content cannot be obtained. Silicon alloy

The impregnation method can obtain aluminum alloys with high silicon content, but in the production process, there are defects such as pores that cannot be completely filled, resulting in a decline in the overall performance of the material

The application of the spray deposition process is limited due to its complex process, expensive equipment, and high manufacturing cost.

Although rapid solidification-powder metallurgy technology can obtain a high solidification rate, the oxygen content of powder metallurgy products is high, which is easy to make samples dirty during preparation and transportation, and the bonding strength between powder particles is limited, which seriously affects Density of the material

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