The company has developed a laser ultrasonic nondestructive flaw detection method for train wheels, which includes: the tested train wheels are placed on the support carrier, and an enhanced medium layer is set between the support carrier and the tested train wheels. The enhanced medium layer is made of materials that receive laser excitation based on physical effects and enhance ultrasonic waves. The enhanced medium layer can avoid damage caused by direct laser contact with the wheels, The surface structure of the reinforcing medium layer can be changed according to the change of the surface structure of the detected train wheel; The laser generator emits the laser to the lens, and the lens reflects or refracts the laser; The enhanced medium layer receives the reflected or refracted laser and generates ultrasonic wave. The ultrasonic wave passes through the enhanced medium layer and scans the flaw detection surface of the tested train wheel; The ultrasonic receiving device captures the ultrasonic echo signal of the flaw detection surface to detect the damage condition of the flaw detection surface. The invention has the effect of improving the ultrasonic conversion rate and avoiding the thermal damage caused by the direct projection of the laser onto the wheel surface.
The company has developed a laser ultrasonic nondestructive flaw detection method for train wheels, which includes: the tested train wheels are placed on the support carrier, and an enhanced medium layer is set between the support carrier and the tested train wheels. The enhanced medium layer is made of materials that receive laser excitation based on physical effects and enhance ultrasonic waves. The enhanced medium layer can avoid damage caused by direct laser contact with the wheels, The surface structure of the reinforcing medium layer can be changed according to the change of the surface structure of the detected train wheel; The laser generator emits the laser to the lens, and the lens reflects or refracts the laser; The enhanced medium layer receives the reflected or refracted laser and generates ultrasonic wave. The ultrasonic wave passes through the enhanced medium layer and scans the flaw detection surface of the tested train wheel; The ultrasonic receiving device captures the ultrasonic echo signal of the flaw detection surface to detect the damage condition of the flaw detection surface. The invention has the effect of improving the ultrasonic conversion rate and avoiding the thermal damage caused by the direct projection of the laser onto the wheel surface.
