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低压铸造法可以采用砂型、金属型或石墨型等,是介于普通铸造和压力铸造法之间的一种工艺方法。虽然具有充型平稳,在压力下结晶其组织致密废品率低,金属利用率高等优点。但也有一定的局限性,不能完全代替其他铸造方法。因此,在考虑工艺方法时,首先必须根据合金和铸造结构的特点、性能要求,及其生产过程的综合经济效果进行分析,否则,其优点不仅难以体现,反而会使铸造工艺设计和生产过程复杂化。 低压铸造法就是使密闭的熔炉(坩埚)内的融熔金属或合金,在低压气体的作用下沿升液管道平稳地上升进入铸型,并在压力下结晶凝固,然后除去压力,再使升液管道
Low-pressure casting method can be used sand, metal or graphite type, is between ordinary casting and pressure casting method between a process. Although the filling has a smooth, under pressure crystallization of its dense tissue rejection rate, high metal utilization advantages. But there are some limitations, can not completely replace other casting methods. Therefore, when considering the process method, we must first analyze the characteristics of the alloy and the casting structure, the performance requirements and the comprehensive economic effects of the production process, otherwise, the advantages are not only difficult to reflect, but will make the casting process design and production process complicated The Low-pressure casting method is to make a closed melting furnace (crucible) within the molten metal or alloy, under the action of low-pressure gas along the riser pipe rises smoothly into the mold, and crystallized under pressure and then solidified, and then remove the pressure, Liquid pipe