减少铝合金半环零件变形工艺研究

Reduce Deformation of Half-Ring Forging Aluminum Alloy Part

铝合金材料因其密度低、耐腐蚀性能好、抗疲劳性能优异、质量轻等优点在航空发动机中得到广泛的应用。但由于航空发动机零部件公差要求较严格,而铝合金零件在机械加工完成后,由于残余应力的释放使零件变形较大,无法满足使用要求,从而导致该类零件废品率居高不下,造成了严重的经济损失和资源浪费。本文通过试验对比的方法找出造成残余应力产生的主要原因,并通过相应的工艺改进减小了零件的变形,从而满足了零件的使用要求,取得了很好的经济效益。

Aluminum alloy was applied widely for aviation engines because of its low density, good corrosion resistance, excellent fatigue resistance performance, light mass and so on. But the tolerance for the components of aviation engines is required strictly, and the parts with aluminum alloy could not meet the usage requirement after machining due to the residual stress release, which caused the part with bigger deformation, thus this led to such kind of parts with high scrap rate, serious economic losses and resources waste. By test comparison method in the thesis, the main reason that caused the residual stress was found out. by relevant process improvement to minimize part deformation, thus met the part usage requirement, and good economic performance was obtained.