Non destructive testing instruments

Non destructive testing instruments

Non destructive testing instruments refer to testing instruments that do not damage or affect the future performance or use of materials or workpieces.

By using non-destructive testing instruments, defects in the interior and surface of materials or workpieces can be discovered, geometric features and dimensions of workpieces can be measured, and the internal composition, structure, physical properties, and state of materials or workpieces can be determined.

Non destructive testing instruments can be applied to product design, material selection, processing and manufacturing, finished product inspection, and in-service inspection(maintenance and repair)In various aspects, it can play an optimal role between quality control and cost reduction. Non destructive testing instruments also help ensure the safe operation of products(or)Effective use.

Types of non-destructive testing instruments:Ultrasonic flaw detector, magnetic particle flaw detectorXX-ray flaw detector, eddy current detector, acoustic emission detector, magnetic memory detector, and so on.

Ultrasonic flaw detector is a portable industrial non-destructive testing instrument that can quickly, conveniently, without damage, and accurately detect, locate, evaluate, and diagnose various internal defects (cracks, porosity, pores, inclusions, etc.) of workpieces. It can be used in both laboratories and engineering sites. It is widely used in boiler, pressure vessel, aerospace, aviation, power, petroleum, chemical industry, offshore oil, pipeline, military industry, shipbuilding, automobile, machinery manufacturing, metallurgy, metal processing industry, steel structure, railway transportation, nuclear power, universities and other industries.

Eddy current testing machine is a testing method that uses the principle of electromagnetic induction to detect surface and near surface defects of conductive components.

The principle is to use excitation coils to generate eddy currents inside conductive components, and use detection coils to measure the changes in eddy currents, thereby obtaining relevant information about component defects.

According to the shape of the detection coil, it can be divided into through type(Used for testing wires, rods, and pipes)Probe type(Used for local inspection of component surfaces)And plug-in type(Used for internal inspection of pipe holes)Three types.

Magnetic particle inspection is the use of ferromagnetic materials that, after being magnetized, cause local distortion of magnetic field lines on and near the surface of the workpiece due to the presence of discontinuities, resulting in a leakage magnetic field (i.e., the magnetic field formed when magnetic induction lines leave and enter the surface) that adsorbs the magnetic powder applied to the surface of the workpiece, forming visible magnetic traces under appropriate lighting, thereby displaying the position, shape, and size of discontinuities.

Principle of X-ray non-destructive testingXPrinciple of X-ray destructive testing machine, utilizingXA non-destructive testing method that uses radiation to penetrate and attenuate materials to detect defects.XRadiation can inspect the internal defects of metal and non-metal materials and their products. For example, pores and slag inclusions in welds. Volumetric defects such as incomplete welding. industryXRadiographic testing machines are traditionally divided into two categories based on their structure: portable and mobile (fixed).