Internal-Defect Detection in Hot-Rolled Plate & Steel
Use the metal-flaw-detection mode of electromagnetic tomography to detect internal defects and foreign-object positions in hot-rolled steel plate, welds and thick-walled metal parts.
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Background
Internal-defect detection in steel plate, welds and thick-walled metal parts is a key step in metallurgical quality control. Conventional ultrasonic and X-ray methods are limited on high-temperature, high-speed production lines.
Measurement challenges
- High-temperature environments place strict demands on sensor packaging
- Fast line cadence requires millisecond-level response
- Defect types are varied (cracks, inclusions, porosity), requiring algorithm-level adaptation
Our solution
The DEMT-8 digital electromagnetic tomography instrument operates in metal-flaw-detection mode: an 8-channel coil array applies an alternating magnetic field to the part under test and captures the secondary-field perturbation at defects; imaging up to 400 fps matches the line cadence.
Results
- Online identification of the position and scale of internal defects in steel plate
- Data can feed a quality-management system to build product traceability
- The algorithm can be customised and optimised for the customer’s typical defect types
