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一、前言复合扫描B型显示式探伤法主要是:使超声波束同时作扇形扫描和前后扫描——即所谓复合扫描。把工件和内部缺陷造成的各种方向性的声界面所反射的回波信号,变成工件的断面图象,展现在B型显示器上进行观察。采用这种方法能很直观地判断内部缺陷的位置和形状。因此,对超声波探伤结果很容易进行评定,而且探伤的可靠性也显著提高了。复合扫描式的超声波检查方法,在医
First, the foreword Composite scanning B-type display detection method is mainly: make the ultrasonic beam at the same time for fan-shaped scan and before and after the scan - the so-called composite scan. The workpiece and internal defects caused by various directional acoustic interface reflected echo signal into the workpiece cross-sectional images, displayed on the B-type display for observation. Using this method can be very intuitive to determine the location and shape of internal defects. Therefore, the results of ultrasonic flaw detection can be easily assessed, and the reliability of flaw detection has also been significantly improved. Composite scanning ultrasonic examination, in medicine