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Study on the NDT Technique of Weld Defects in Electron-Beam Welding Pistons

Ni Peijun Li Xudong
Inner Mongolia Metals Institute, Baotou 014034, China
Zhang Hui Su Liguang
China North Industries Group Corporation, Beijing 100821, China
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Abstract:

1. Introduction

2. Ultrasonic reflection characteristics of EBW piston welding defects

3. The ultrasonic testing method with 6 probes for defect inspection for EBW piston

4. ICT inspection for EBW piston welding pores

5. Conclusion

  1. The ultrasonic immersion testing method with 6 probes can make defect location, quantity and quality determination for EBW piston's lack of penetration, lack of fusion and the cracks on the upper area of the cooling oil groove. Due to its structure limitation, it can only detect partial area pores.
  2. The sensitivity of the immersion refraction transverse wave is superior to the refraction longitudinal wave for the inspection of the defects on the upper area of the cooling oil groove for EBW piston.
  3. ICT technique has advantages such as free from piston structure and surface, high resolution, visual image, accurate determination of defect location, quantity and quality. It can inspect weld pores of EBW piston reliably.
  4. The ultrasonic immersion testing method with 6 probes is complementary to ICT, which has eventually realized the overall inspection for EBW piston welding defects.

References

  1. Ultrasonic testing compiling group, Ultrasonic testing, Electronic industry publisher, 1980.
  2. Josef and Herbert Krautkramer, Ultrasonic testing of materials, Third edition, 1983.
  3. Moore, J. F., Evolution of computed tomography, Materials Evaluation, 1990, 48(5).
  4. Armisted, R. A., CT: Quantitative 3-D inspection, Advanced materials & Processes, 1988,3.

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