摘要
曲面工件的超声波检测中，由于工件表面曲率对超声波束的散射和聚焦，如何将超声波束准确可靠地投射到工件内的待检测区域，是检测工作中比较关心的问题。本文对棒材和管材超声波检测中常用的扫描方法作了评述，介绍了最近几年出现的适于棒材和管材的接触法和水浸法探伤方法。对于厚壁管和薄壁管，针对不同位置的缺陷，给出了相应的最佳探伤条件。提出了提高管材横波偏置法探伤灵敏度的措施。本文还讨论了一些适合于曲面探伤的探头，如骑马式探头、双晶片聚焦探头、管探头、渐开线探头等。最后讨论了液浸法和接触法探伤参数之间的关系，以及几何声学方法用于曲面工件探伤时的局限性。
During the UST of the curved surface of
work piece, due to the dispersion and focus of the ultrasonic wave beam of the curved
surface curvature, how to project the ultrasonic wave beam to the inspected area of
inside the work piece reliablely is a relatively concerned problem in the inspection
work. This article describes the common scanning method used in the UST of rod and
tubular goods, and introduces the contacting and liquid approaching method which are
used recent years and suitable for rod and tubular goods. Regarding the thick and thin
W.T. of the pipe, it offers the best inspection condition for the different position's
defects and gives the measures taken for the increasing inspection sensitivity of pipe
transverse wave disalignment. Several probes suitable for the curved surface such as
riding probes, double wafer focused probes, tube probes, and involving probes etc. are
also discussed. Finally introduces the relations between the parameter of contact
method and liquid penetrating method and the limitation of using the geometry acoustics
method in the inspection of work piece.
出处
《焊管》
1999年第2期6-11,共6页
Welded Pipe and Tube
关键词
超声波探伤
曲面工件
液浸法
接触法
探头
UST Curved Surface Work Piece
Liquid Penetrating Method Contacting Method Probe
