A Comprehensive Look at Magnetic Particle Testing

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This post was last edited by Zhongyuanren on 2025-2-3 17:13. An Overview of Magnetic Particle Testing. Magnetic Particle Testing (MT) is an old and reliable non-destructive testing technique, yet it is not fully recognized. It is direct, simple, and yields reliable results, but it is often abused or misused. There are various theories regarding its origin; it is generally believed to have originated in the United States, where it was initially used to inspect railway parts, castings, and similar items. The principle is to apply magnetic powder after magnetizing the part; the accumulation of the magnetic powder reveals the defects. Suitable for detecting linear defects, such as cracks. Equipment is divided into portable, fixed, and accessories. The basic procedure includes understanding the testing requirements, materials, equipment, and qualifications, as well as following the established procedures for testing. The steps include evaluating the surface, cleaning, magnetizing, assessing the effect, testing, evaluating the results, writing a report, and cleaning the sample. Key technology choices include the continuous method and residual magnetism method, wet methods and dry methods, as well as visible magnetic particles and fluorescent magnetic particles. Fluorescent magnetic powder is the most sensitive.