Vacuum differential pressure casting has advantages of smelting in vacuum, filling steadily, solidifying under high pressure. Process parameters of filling and solidification are important to the final castings’ form...Vacuum differential pressure casting has advantages of smelting in vacuum, filling steadily, solidifying under high pressure. Process parameters of filling and solidification are important to the final castings’ forming properties, the parameters include vacuum degree, gas flow, filling velocity, filling pressure, rising pressure velocity, holding pressure and keeping pressure time. By casting copper alloy impeller, we calculated and deduced the gas flow, filling velocity, filling pressure, rising pressure velocity, holding pressure, and measured the keeping pressure time during experiment. Ultimately we convinced these parameters through experiment and successfully produced the impeller.展开更多
文摘Vacuum differential pressure casting has advantages of smelting in vacuum, filling steadily, solidifying under high pressure. Process parameters of filling and solidification are important to the final castings’ forming properties, the parameters include vacuum degree, gas flow, filling velocity, filling pressure, rising pressure velocity, holding pressure and keeping pressure time. By casting copper alloy impeller, we calculated and deduced the gas flow, filling velocity, filling pressure, rising pressure velocity, holding pressure, and measured the keeping pressure time during experiment. Ultimately we convinced these parameters through experiment and successfully produced the impeller.
