Analysis of abnormal magnetic particle indications in magnetic particle testing ofplug welded impeller

Four conventional nondestructive testing methods, combined with microscopic observation, metallographic analysis and mechanical property testing, are used to analyze the character and generation mechanism of abnormal magnetic particle indications on plug welded impeller. The technological process for determining the display properties of magnetic particle indications is developed, which can improve the magnetic particle testing efficiency of plug welded impeller welds.