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一、前言 铸件中产生“夹杂”缺陷往往是造成铸件报废或机械性能降低的主要原因之一,也是进一步扩大铸件应用范围的主要障碍。对于在高温负荷下工作的航空发动机涡轮工作叶片,仅仅0.05mm~2的微小夹杂缺陷即影响零件的疲劳寿命 因此,克服铸造夹杂缺陷至为重要。 涡轮叶片的内部夹杂问题,是航空精铸行业普遍存在的问题。南方动力机械公司的精铸涡轮叶片,由于夹杂所造成的废品占整个废品的60％以上,长期以来难以解决。直至应用泡沫陶瓷过滤器过滤浇注以后,才基本得到克服。
First, the introduction Casting “inclusions” defects are often caused by casting scrapped or mechanical performance is one of the main reasons to reduce, but also to further expand the scope of casting the main obstacles. For aeroengine turbine working blades working under high temperature load, only tiny inclusions of 0.05mm ~ 2 affect the fatigue life of the parts. Therefore, it is important to overcome the casting miscrosses. Turbine blade internal inclusions, aviation casting industry is a common problem. Southern Power Machinery Company’s precision cast turbine blades, as a result of inclusions caused by the waste accounted for more than 60% of the entire waste, long difficult to solve. Until the application of ceramic foam filter after pouring, basically been overcome.