AC 15000A Two Magnetized Coils Fluorescent Magnetic Particle Flaw Detector

AC 15000A Two Magnetized Coils Fluorescent Magnetic Particle Flaw Detector 

 I. Working Principle

Magnetic particle inspection utilizes the interaction between the leakage magnetic field at the defect site of the workpiece and magnetic particles. It takes advantage of the difference in magnetic permeability between surface and near-surface defects (such as cracks, slag inclusions, hairline streaks, etc.) of steel products and the magnetic permeability of steel. After magnetization, the magnetic field at the discontinuous parts of these materials will be distorted, resulting in partial magnetic flux leakage and the generation of a leakage magnetic field. By taking advantage of the characteristic that the leakage magnetic field at the defect site can adsorb magnetic particles, This attracts magnetic powder to form a magnetic powder accumulation at the defect site - magnetic traces. Under appropriate lighting conditions, the location and shape of the defect are revealed.

II. Execution Standards

Magnetic particle flaw detector: GB/ T8290-2011

Observation conditions for magnetic particle testing: GB/T 5097-2020/ ISO 3059:2012

American Society for Testing and Materials: Magnetic particle testing method ASTM E1444-01

Eu, international standard: DIN EN ISO 9934-2-2003

III. Technical Parameters

V. Inspection Process

Part(1) : Hoisting and loading - Electrode clamping - spraying magnetic suspension - magnetization - Observation - Rotating the part 90 degrees, second inspection - demagnetization - unloading

Part(2) : Hoisting and loading - Electrode clamping - Spraying magnetic suspension - magnetization - Observation - demagnetization - unloading