Application of Eddy Current Testing Equipment in High-end Fields of Various Industries

1. Eddy current testing equipment in aviation

Eddy current testing equipment technology has been widely used in the testing of metal components in the aviation field. In order to ensure the flight safety of the aircraft, relevant components must be inspected regularly in service. Eddy current non-destructive testing equipment is usually used to detect surface and subsurface defects such as aero engine blade cracks, bolts, screw holes, multi-layer structures of aircraft, landing gear, hubs, and aluminum skins. It is also used to detect defects of wing connection welds, etc. In the detection, it can effectively suppress the interference signal caused by probe shaking and uneven material.

2. Eddy current testing equipment in the electric power and petrochemical fields

Eddy current testing equipment is used for non-ferrous and ferrous metal pipes (such as copper pipes, titanium pipes, stainless steel pipes, boiler four pipes) in power stations (thermal power plants, nuclear power plants), petrochemicals (oil fields, refineries, chemical plants) and other fields In-service and pre-service inspections. The intergranular corrosion of the pipeline, the thinning of the wall thickness and the abrasion of the outer wall can be reliably detected, and the interference signal of the support plate and the tube plate can be effectively removed in the detection. In addition, eddy current non-destructive testing equipment is also used for the detection of steam turbine shaft center holes, engine blades, sucker rods, drill rods, bolts, screw holes and other components; acoustic pulse detection technology can be used for rapid detection of various metal or non-metal pipelines; metal magnetic memory technology is used to diagnose the early damage of ferromagnetic parts of in-service equipment.

3. Eddy current testing equipment in metallurgy and machinery

Eddy current testing equipment technology is used for online and off-line flaw detection of various metal pipes, rods, wires and wires. In the inspection process, both long and short defects such as long-pass and slow-change defects (such as through holes) can be taken into account at the same time; it can effectively suppress certain interference signals (such as uneven material, shaking) during online and offline pipeline inspections. It has high sensitivity for the detection of inner and outer wall defects of metal pipes; it can also be used for mixing and sorting of mechanical parts, evaluation of carburizing depth and heat treatment state, hardness measurement, etc.

4. Eddy current testing equipment in nuclear energy industry

Eddy current testing equipment technology is used for the testing of nuclear fuel rods, titanium pipes, threaded pipes and other metal pipes; it is used for the barrels, missile launchers, shell bases, shell cases of weapons, and the engine blades, wings, landing gears and hubs of fighters. Pre-service and in-service inspections, etc.; metal magnetic memory technology is used for early diagnosis of metal structures such as armoured vehicles and ships; low-frequency electromagnetic field and magnetic flux leakage technology are used for quality control of ferromagnetic materials such as decks and oil storage tanks and welds.

The future development of eddy current testing technology includes: perfecting the theory of transducer design, developing better-performing eddy current testing and testing equipment; studying the eddy current positioning technology and 3D imaging technology of the size, shape, location and depth of defects; researching and popularizing far-field eddy current testing technology; further research Surface fatigue crack propagation, cracking, machining and grinding burns and residual stress eddy current detection technology of metal materials. Eddy current nondestructive testing equipment using this technology is bound to be widely used.