超声波探伤轧辊内部缺陷的波形特征

Waveform Character of Internal defects in Roll by Ultrasonic Testing

目前的A型超声波探伤仪只能提供缺陷回波的时间和幅度信息,而根据这两个信息来判定缺陷的性质是有困难的。实际探伤中,探伤人员常常根据经验,结合工件的加工工艺、缺陷的特征、缺陷波形和底波情况来分析,估计缺陷的性质。针对轧辊的成型工艺和加工工艺,根据前人的经验,结合工作中所做的一些解剖分析,对轧辊中的常见缺陷及缺陷波形特征进行了归纳总结。为以后对轧辊的缺陷定性积累了经验,并提供了判定依据。

A current-type ultrasonic flaw detector can only provide defect echo time and amplitude information, and it is difficult to determine the nature of defects on the basis of the information. During practical testing, the nature of defects was usually estimated by the testing staff based on experience combined with the workpiece processing technology, the characteristics of defects, the waveforms of defect and back wall echo. In this paper, cold roll fom forming technology, processing technology, combined with the experience of their predecessors as well as their own in cold roll was summarized. The work accumulated experience and provided basis for future qualitative evaluation of cold roll deficiencies.