Method for identifying typical flaws of forged piece based on ultrasonic phased array technology

Abstract

The invention discloses a method for identifying typical flaws of a forged piece based on an ultrasonic phased array technology and belongs to the field of nondestructive detection. The method is characterized in that hardware platforms for flaw identification comprise a computer (1), an ultrasonic phased array system (2) and a linear array sensor (3). The method comprises the following specific steps: exciting/receiving an ultrasonic signal by using the ultrasonic phased array system; sending and receiving the ultrasonic signal by using the linear array sensor; acquiring and detecting an A scanning signal and a sector scanning graph by using the computer; observing the shape of a flaw echo, calculating the spectrum characteristic information of the flaw echo, and observing the contour shape of a flaw vector scanning graph for flaw type determination. The invention provides the method for identifying the internal flaw type of the forged piece, and the problems that a conventional ultrasonic flaw detection method is low in detection efficiency, the flaw type cannot be accurately determined and the method highly depends on the professional experience of engineering staff are solved.

Description

technical field [0001] The invention relates to a method for identifying defects of forgings based on an ultrasonic phased array system. The method is mainly used for detecting and identifying defects of forgings and belongs to the field of non-destructive testing. Background technique [0002] As the basic components of various mechanical equipment, forgings are widely used in key fields such as aerospace, nuclear power, and ships. Due to the large volume and size of most forgings, and the complex shape and production process, it is easy to produce cracks, looseness and other defects in the production process. Defects in forgings will significantly reduce their mechanical properties, and even break during use, causing serious safety and quality accidents. Therefore, it is very important to inspect internal defects of forgings. [0003] Ultrasonic flaw detection, as one of the five conventional detection methods, has a high sensitivity to the detection of internal cracks, p...

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