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针对车轴几何尺寸及晶粒度的差异直接影响超声波探伤结果的判定这一问题，进行了试验研究，并介绍了如何改进探伤方法、完善工艺、提高质量。
Aiming at the problem that the difference of axle geometry and grain size directly affects the determination of ultrasonic flaw detection results, the experimental research is conducted and how to improve the flaw detection method, improve the technology and improve the quality.