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超声波探伤可以用来检验钢板的质量。但仅利用单收发的纵波探伤,还不能发现位于工件表面或表面附近(<7毫米深)的缺陷。如若仪器使用时间较长,盲区还可相应增大。我厂船用钢板,一般在3到60毫米范围内,特别是薄钢板,利用单收发的纵波探伤是无法测出钢板内部缺陷的,即使较厚的钢板也难以测出位于近表面的缺陷。为此,我厂在中南物理研究所的
Ultrasonic flaw detection can be used to test the quality of steel. However, the use of single-wave longitudinal wave inspection, but also can not find the surface or near the surface defects (<7 mm deep). If the instrument is used for a long time, the blind spot can also be increased accordingly. Our factory marine steel plate, generally in the range of 3 to 60 mm, especially the thin steel plate, the use of single-pass longitudinal wave inspection is unable to detect the internal defects of steel plate, even thicker steel plate is also difficult to detect defects located near the surface. To this end, I plant in South Africa Institute of Physics