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管道焊缝根部区域结构复杂,反射回波杂乱,是未焊透和裂纹的产生处,是超声波检测的重点和难点。列举了几种具有代表性的焊缝根部结构形式,并分析其结构回波与缺陷特点,从而甄别焊缝根部真伪缺陷。
The root zone structure of the pipe weld is complicated and the reflected echo is disorderly. It is the place where the penetration and cracks are not penetrated. It is the focus and difficulty of the ultrasonic inspection. Several representative forms of weld root structure are listed, and the characteristics of structural echoes and defects are analyzed to identify the root defects of weld root.