本文介绍纵波充水脉冲反射对板材进行探伤的方法,并对板材中的缺陷进行定量及定性分析。为保证产品质量,我们用超声波探伤仪对军用钢板进行检查。同时,对检查出的缺陷进行定位、定量和定性。但超声波定性白点缺陷,难度较大。通过实践,我们初步掌握了白点的一般规律和特征。但是,对于白点的判断,还须根据多方面的因素进行综合分析;当超声波发现可疑白点时,可取缺陷试样,进行断口验证。 In this paper, the method of flaw detection by longitudinal wave water-filled pulse reflection is introduced, and the defects in the slab are quantitatively and qualitatively analyzed. In order to ensure product quality, we use ultrasonic flaw detector on the military steel inspection. At the same time, check the defects identified, quantitative and qualitative. However, ultrasonic qualitative white point defects, more difficult. Through practice, we have initially mastered the general rules and characteristics of white spots. However, the judgment of the white point must be comprehensively analyzed according to various factors. When the suspicious white point is found by the ultrasonic wave, the defect sample can be taken for the fracture verification.