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磁粉探伤是无损检测中应用较早、较广且精度较高的一种方法。它是利用缺陷处漏磁场与磁粉的相互作用的原理,检测铁磁性材料表面及近表面的缺陷,是以被检工件进行磁化为物理基础,广泛应用了电磁学原理,石内配总厂将磁粉探伤用于活塞销表面及近表面缺陷,的检测起步较早,并对磁粉探伤的各环节进行了大量的试验研究。试验证明,活塞销磁粉探伤比超声波探伤和渗透探伤的灵敏度高,且操作简便,缺陷位置、大小直观,结果可靠。但在探伤过程中对
Magnetic particle inspection is an earlier, wider and more accurate method for non-destructive testing. It is the use of defects at the magnetic field leakage and magnetic interaction of the principle of detecting the surface and near the surface of ferromagnetic materials defects is based on the workpiece being magnetized as the physical basis of the extensive use of electromagnetics principle, Magnetic particle inspection for piston pin surface and near surface defects, the detection started earlier, and the magnetic particle inspection of all aspects of a large number of experimental studies. Experiments show that the piston pin magnetic particle inspection than the ultrasonic flaw detection and penetration testing of high sensitivity and ease of operation, defect location, size and intuitive, the results are reliable. But during the inspection process