519法兰壳体是大型回转体结构的气密性铸件,其外形尺寸为680mm×364mm,通过低压铸造的生产实践表明,在模具温度为300~350℃,充型压力为0.3MPa,充型时间为20s,保压压力为0.8MPa,保压时间为120s的条件下,可生产出优良铸件,工艺出品率由砂型铸造的50%提高到75%以上,铸件一次气密性检漏合格率达98%以上。由于铸件加工量比砂型铸造工艺减少了5%以上,铸件质量由52kg降低到36kg,每件减轻了16kg,仅此项每年可节约30万元。
The 519 Flange house with the size of 600 mm×364 mm that is a gas-sealing heavy rotary structure casting is manufactured in low pressure casting.The results showed that the sound Flange house can be manufactured successfully with die temperature of 300~350 ℃,filling pressure of 0.3MPa and filling time of 20 s,holding pressure of 0.8MPa as well as holding pressure time of 120 s.Product yield increases from 50% in sand casting to over 75%.The qualified rate of once-gas sealing testing reaches up to 98%.
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