Near-net forming die and near-net forming method for high-silicon aluminum alloy shell

Abstract

The invention provides a near-net-shape forming mold and near-net-shape forming method of a high-silicon aluminum alloy shell. The mold comprises long side pressing plates, short side pressing plates,an upper pressing block, a lower pressing block and a steel sleeve, wherein the long side pressing plates and the short side pressing plates are assembled into a mold frame, and the mold frame is provided with a mold cavity with an upper opening and a lower opening; and the upper pressing block and the lower pressing block can move in a reciprocating mode in the mold cavity, the top surface of the lower pressing block is provided with a boss, and the combined mold is fixed by the steel sleeve. The near-net-shape forming method of the high-silicon aluminum alloy shell comprises the following steps that gas atomization is conducted to prepare powder to obtain an aluminum-silicon raw material, a graphite mold is subjected to surface coating, drying and combination, then the raw material is flatly laid in the mold for pressure sintering, and mold stripping is conducted to obtain an aluminum-silicon shell material. According to the near-net-shape forming mold and near-net-shape forming method of the high-silicon aluminum alloy shell, the mold design is combined with the pressure sintering to directly manufacture the high-silicon aluminum alloy electronic packaging shell, the productionefficiency and the raw material utilization rate are improved, the preparation process is controllable, and is good in stability, and the method has extremely high industrial application value, and can be popularized to the manufacturing of other metal materials.

Description

technical field [0001] The invention relates to a near-net forming method of a high-silicon aluminum alloy shell, in particular to preparing an electronic packaging shell material with a near-net size through design and assembly of a mold and pressure sintering. Background technique [0002] Electronic packaging materials are base materials used to carry electronic devices and their interconnections, and play the roles of mechanical support, sealing environment protection, signal transmission, heat dissipation and shielding. According to the packaging structure, electronic packaging materials mainly include substrates, wiring, interlayer dielectrics and sealing materials; according to the packaging form, they can be divided into hermetic packaging and physical packaging; according to the material composition, they can be divided into ceramic-based, plastic-based and metal-based electronic packaging materials. The research, development and application of electronic packaging ...

AI Technical Summary

Problems solved by technology

[0005] In recent years, it is not uncommon to see silicon-aluminum alloys as electronic packaging materials, but the processing steps are many and complicated, the parameter requirements are relatively strict, and the finished product efficiency is low

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