Research on Abnormal Imaging Problems in Fluorescence Detection of Aviation Aluminum Alloy Case Castings
In the production process of aluminum alloy aircraft case castings,sand blowing and mechanical polishing are usually used to clean the surface of the castings to remove surface oil stains,sand sticking and other issues,ensuring the appearance quality of the castings.However,during the fluorescence penetration inspection of the gearbox castings after heat treatment,abnormal imaging problems occurred,greatly affecting the judgment of surface defects in the castings.This article analyzed the abnormal fluorescence imaging of the castings through optical microscopy and scanning electron microscopy,and determined that the main reason for the abnormal fluorescence imaging of the castings after heat treatment was mechanical damage to the surface of the castings caused by the sand blowing and surface polishing.By adjusting the sand blowing process parameters and adjusting the casting surface cleaning process,the problem of the abnormal fluorescence imaging in the aluminum alloy casing castings after heat treatment was ultimately solved.
aluminum alloycase castingsfluorescence detectionblowing sandpolishing and grinding
万方数据
维普
