汽轮机铸件汽缸疏松缺陷超声波检测研究

Research on Ultrasonic Inspection of Turbine Cylinder Porosity Defects

分析了铸件汽缸的缺陷中结构松散类似针型海绵团状的疏松缺陷对工件性能和后期加工的影响,详细介绍了汽轮机铸件汽缸超声波检测方法,介绍了超声波检测仪器、探头和检测用试块的选择,介绍不同探头检测灵敏度设置方法,分析了铸件疏松波形的判定和测试,通过疏松缺陷的解剖验证了其超声波缺陷波形特征与实物的相符性,最终确定铸件疏松缺陷超声波检测控制方法。

In this paper, the influence of loosely structured looseness similar to needle-shaped sponge mass onworkpiece performance and post-processing is analyzed. The ultrasonic testing method of steam turbine castingcylinder is introduced in detail. The selection of ultrasonic testing instrument, probe and test block is introduced.The setting method of sensitivity of different probes is introduced. The determination and test of the loosewaveforms of the castings are analyzed. Through the analysis of the looseness defect, the waveformcharacteristics of the ultrasonic defect are verified to be consistent with the real object. Finally, the ultrasonicdetection and control method of the casting looseness defect is determined.