Several problems of ultrasonic flaw detection of titanium alloy forgings In addition to the general forging ultrasonic flaw detection methods should pay attention to the problem, the ultrasonic flaw detection of titanium alloy forgings there are several issues that need attention. I. Metallurgical quality of raw materials Most of the defects described above are present in the raw material, combined with the consideration of the actual situation of China's titanium industrial production (raw materials, technology, etc.), coupled with the titanium alloy is expensive, difficult to process, and the shape of the forgings are generally more complex, so that the ultrasonic flaw detection of forgings there are certain difficulties (eg, dead corners, blind zones, detection of unfavorable direction, etc.) in order to prevent the quality of the hidden danger as early as possible in the initial stage, it should be In order to prevent the quality hazards at the initial stage, we should strictly control the metallurgical quality of raw materials, and the ultrasonic acceptance standard should be strictly required, and the method should be more detailed. For example, for titanium alloy round bar, in addition to the general circumference of 360 ° radial incident longitudinal wave detection, should also be made circumference of 360 ° chordal transverse wave detection (refraction angle is generally 45 °), in order to ensure the discovery of straight probe can not be found on the surface.