对一种发动机导向器叶片的变形、裂纹及其断口进行金相和电镜分析。结果表明,发动机温度场不均匀,出现局部高温,致使导向器叶片产生过烧,造成变形和裂纹。

The paper gives analysis to the tests on deformation cracks and fracture of an engines nozzle vanes done by metallographic and scan electromicroscope methods The results show that the non-unibormity of engine temperature fields and the partial high temperature lead to overheat of the nozzle vanes and result in deformation and cracks.