The special magnetic image in the magnetic inspection of steam turbine blades was analyzed,the causation of the fake magnetic was discovered,it was eliminated it by heat treatment technics.

• 对汽轮机动叶片磁粉探伤过程中出现的特殊磁痕现象进行了分析,找出了产生伪磁痕的原因,通过热处理工艺消除了特殊磁痕现象。