Differential pressure pouring casting method of particle reinforced aluminum-based composite material
A particle-reinforced aluminum and composite material technology, applied in the field of casting, can solve the problems of dispersed distribution, shrinkage, pinholes and other holes in castings, and achieve the effect of stable and reliable casting quality
Inactive Publication Date: 2017-04-19
SHANXI FENXI HEAVY IND
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Problems solved by technology
[0003] The invention provides a differential pressure pouring casting method for particle reinforced aluminum matrix composites, which solves the problem of a large number of diffusely distributed shrinkage and pinhole holes in the casting when the particle reinforced aluminum matrix composites are cast using the prior art defective technical issues
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[0015] The present invention is described in detail below in conjunction with the accompanying drawings:
[0016] The structure of the differential pressure casting machine for realizing the present invention is composed of nine parts, the upper tank 1 and the lower tank 9 are both pressure vessels, and the upper and lower tanks are divided into two independent by the middle partition 4 In the sealed space, the upper and lower tanks and the middle partition are locked through the locking snap ring 3 in the middle, and the furnace body is locked and the pressure is started synchronously. During the pouring process, the upper tank is exhausted to form a pressure difference between the upper and lower tanks, and the alloy liquid 6 in the crucible 7 in the holding furnace 8 is poured into the casting mold through the liquid riser 5 under the action of the pressure difference. in chamber 2. After the alloy liquid fills the cavity in the mold cavity 2, the pressure difference betwe...
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The invention discloses a differential pressure pouring casting method of a particle reinforced aluminum-based composite material. The problem that when the particle reinforced aluminum-based composite material is cast through the existing technology, a large quantity of shrinkage pores and pinhole-like holes which are distributed in a dispersed mode are generated in castings is solved. The differential pressure pouring casting method comprises the steps that a riser tube on a differential pressure casting machine is preheated to the temperature of 150-200 DEG C, a sand box is placed in an upper tank of the differential pressure casting machine on a middle partition plate, the upper tank of the differential pressure casting machine is covered, the upper tank and a lower tank of the differential pressure casting machine are locked tightly through a locking ring, compressed air is introduced into the upper tank and the lower tank of the differential pressure casting machine, inflation is stopped when the air pressure reaches a set value, then the upper tank is deflated, the pressure difference is formed, a casting mold is cast, after a molding cavity is filled, the pressure difference is paused briefly for 5 seconds, the upper tank continues to be deflated, deflation of the upper tank is stopped when the pressure of the upper tank and the pressure of the lower tank meet technological requirements, a system is in a pressure maintaining state, and crystallization solidification of a casting is completed under the pressure. The differential pressure pouring casting method meets design requirements, and quality of the casting is stable.
Description
Technical field [0001] The invention relates to a casting method, in particular to a differential pressure casting method of particle-reinforced aluminum matrix composite materials. Background technique [0002] Differential pressure casting is based on low-pressure casting. A sealing cover is set outside the casting mold, and compressed air is introduced into the crucible and the cover at the same time. After reaching the specified pressure value, the sealing cover is used to reduce the pressure or the crucible is pressurized to make the crucible The alloy liquid inside is filled into the casting mold in the sealing cover to form a casting. Particle-reinforced aluminum matrix composite material is a new type of composite material that adds reinforcing phase particles to the aluminum matrix. Reinforcement phase particles are high melting point compounds, which exist in the form of foreign particles in the alloy liquid. Due to their high content and dispersed distribution, t...
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IPC IPC(8): B22D18/04
CPCB22D18/04
Inventor 高永军宗绍迎薛永军方勇梁晶王晓庆
Owner SHANXI FENXI HEAVY IND