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Melt-control in-situ synthesis aluminum matrix composite pressure-regulating casting method and system

An aluminum matrix composite material, in-situ self-generated technology, applied in the field of aluminum matrix composite materials, can solve the problems of high cost and high gas pressure

Pending Publication Date: 2021-12-31
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through differential pressure casting, strong feeding ability can be obtained, clear contours can be obtained, the size is accurate to the casting, and the mechanical properties of the casting can be improved, but the differential pressure casting involves high gas pressure and complicated gas pipeline control, and the cost is relatively high. high

Method used

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  • Melt-control in-situ synthesis aluminum matrix composite pressure-regulating casting method and system
  • Melt-control in-situ synthesis aluminum matrix composite pressure-regulating casting method and system
  • Melt-control in-situ synthesis aluminum matrix composite pressure-regulating casting method and system

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Embodiment

[0047] Such as figure 1 As shown, the pure aluminum or aluminum alloy substrate is melted at 700-760° C., the aluminum melt 2 is placed in the aluminum melting furnace 1 , and reaction salts and reaction aids are added for reaction. The immersion tube 5 of the vacuum bag 3 arranged above the aluminum melting furnace 1 is immersed into the aluminum melt 2. The vacuum chamber 8 of the vacuum bag 3 is evacuated through the pumping port 4, so that the aluminum melt 2 enters the vacuum bag 3 under atmospheric pressure.

[0048] At the same time, the aluminum melt is sprayed with argon rotation: the graphite rotor is lowered, and the rotating rod 6 of the graphite rotor passes through the sealed bearing 7 arranged on the top of the vacuum bag 3, passes through the vacuum chamber 8, and inserts the nozzle 9 into the bottom of the aluminum melt 2. At the bottom, argon gas is blown in through the middle hole of the rotating rod 6 and ejected from the rotating nozzle 9. The formed bub...

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Abstract

The invention discloses a melt-control in-situ synthesis aluminum matrix composite pressure-regulating casting method and system. Uniform distribution of micro-nano particles in an aluminum matrix is achieved through electromagnetic stirring and ultrasonic treatment; melt purification is realized through rotary injection and vacuum degassing; controllable nucleation of a solid precipitated phase in a melt under interference of the micro-nano particles is achieved through modification of composite rare earth elements, on the basis of low-pressure casting, a gravity hydraulic pipe is arranged, and according to a Pascal's law, the aluminum melt subjected to mold filling is crystallized and solidified under high pressure. According to the melt-control in-situ synthesis aluminum matrix composite pressure-regulating casting method and system, a melt-control in-situ synthesis aluminum matrix composite can be solidified under higher pressure, and the melt-control in-situ synthesis aluminum matrix composite pressure-regulating casting method and system can be used for casting forming of high-quality aluminum matrix composite large complex thin-wall castings and can be achieved without a complex control gas circuit.

Description

technical field [0001] The invention relates to the field of aluminum-based composite materials, in particular to a pressure-regulating casting system and method for melt-controlled in-situ self-generated aluminum-based composite materials. Background technique [0002] Lightweight and high strength is the eternal theme of the development of structural materials. As the most widely used lightweight structural material, aluminum alloy has been developed for more than a hundred years and its performance potential has reached its limit. Reinforced aluminum alloy with ceramics is an effective way to achieve its performance leap. For example, the commonly used SiC particle-reinforced aluminum matrix composites in the world can greatly increase the stiffness and hardness of the material, but it brings a series of problems such as deterioration of plasticity and very difficult processing and forming, which seriously hinders its engineering application. Synthesizing micro-nano-scal...

Claims

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Application Information

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IPC IPC(8): B22D18/04B22D18/08
CPCB22D18/04B22D18/08
Inventor 王浩伟李险峰陈东夏存娟邵丽雄金鑫源
Owner SHANGHAI JIAO TONG UNIV
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