热挤压管嘴的超声波检测

详细信息

Ultrasonic Testing of Hot Extrusion Nozzle

摘要: 采用热挤压成型的管嘴结构复杂，产生多方向缺陷的可能性较大，必须按RCC-M《压水堆核岛机械设备设计和建造法则》规范进行多方向的全体积超声检测。按照RCC-M规范对母管的质量要求确定了管嘴检测时对比试样的轴向、周向人工槽尺寸，并按管嘴的实物形状制作了对比试块。采用多角度探头检测时，重点对内壁R弧处的轮廓界面回波进行了分析，确定其为非缺陷回波，验证了热挤压直接成型管嘴工艺的可行性。
- 热挤压管嘴 /
- 对比试块 /
- 非缺陷回波
Abstract: The tube mouth of hot extrusion forming must be inspected by ultrasonic testing according to the “RCC-M PWR nuclear machinery design and construction rules” because of the complexity of its structure and high probability of producing multi-direction defects. The axial and circumferential artificial slot size of reference blocks for the nozzle must be fabricated according to the RCC-M specification requirement for the quality of the mother tube and according to the physical shape of nozzle. Using multi-angle probe detection, the key point was to analyze the echo from the lining of R arc contour interface, which was identified as the defect echo, verifying the feasibility of hot extrusion forming nozzle process directly.
- Hot extrusion nozzle /
- The reference blocks /
- The defect echo

[1]	胡天明.超声探伤［M］.武汉：武汉测绘科技大学出版社,1994.