介绍了火力发电厂 1 2 5MW机组汽轮机叶片检查中应该着重检查的部位和叶片表面容易产生的缺陷以及用渗透探伤法检查叶片表面裂纹的过程及影响因素。 This paper introduces the parts that should be inspected in the steam turbine blade inspection of 125MW steam turbine unit in power plant and the flaws that are easily produced on the surface of the blade as well as the process and the influencing factors of checking the surface cracks on the blade by the penetrant flaw detection method.