Method for quickly screening coarse grain bolts through audio

The invention discloses a method for quickly screening coarse grain bolts through audio, the method comprises the following steps: forming a bolt audio information database by collecting audio, grain size, specification and mark information of the bolts, knocking the bolts by using a copper hammer in a maintenance process, collecting audio and comparing the audio with the audio information database of the bolts with the same specification and the same material, and evaluating the grain size of the bolts, and if the evaluation result is that grains are coarse, performing further judgment through metallographic structure analysis and ultrasonic detection, if the evaluation result is that the crystal grains are fine, not using the sample as a metallographic spot check sample for metallographic analysis temporarily. According to the method, the bolt screening efficiency and accuracy are greatly improved, and the bolt service safety and stability are improved. 本发明公开了一种通过音频快速筛选粗晶粒螺栓的方法，该方法通过收集螺栓的音频、晶粒尺寸、规格、牌号信息形成螺栓