Investigation on Ultrasonic Test Technique of Heavy Wind Power Nodular Iron Castings
The experience with defects ultrasonic test (UT) of heavy wind power nodular iron castings was introduced.It was pointed out that one of the important reasons causing defect to be missed in ultrasonic test was that there was quite big deviation existing when determining defect size,form and sort according to the reflection wave signal.The reasons causing defects and rational choice of their test methods were discussed completely and deeply,and the relative prominent problems met in defects test were systematically analyzed.The A type pulse reflection technique as well as similarities and differences of different defect sorts were described.The defects sorts and characteristics of waveform were defined.Based on the Europe standard EN 12680-3:2012 and referring to the results of radial test (UT) and layer by layer dissection test,the veracity of ultrasonic defect test of heavy nodular iron castings was assessed.
nodular ironwind power castingultrasonic testcasting defect
NETL
NSTL
万方数据
维普
