Device for the tomographic ultrasound inspection of an internal structure of a metal slab and method for in-situ quality inspection of metal slabs

摘要

An apparatus for tomographic ultrasound testing of an internal structure of a metal slab is proposed, comprising a plurality of ultrasound transducers and a control and data processing unit, the ultrasound transducers being arranged on a surface of the slab, the control and data processing unit being configured such that at least one part the ultrasound transducer is controlled individually and in succession to excite sound waves in the slab, the ultrasound transducers being configured for time-resolved detection of sound waves scattered and / or reflected on the inner structure of the slab, the control and data processing unit for the reconstruction of tomographic images based on the ultrasonic transducers detected time signals is configured. Furthermore, a method for in-situ quality inspection of metal slabs with such a device is proposed, the slab by an S continuous casting process is produced and the ultrasound transducers are guided along a test track, a tomographic ultrasound test of the slab being carried out at different positions, an error level being classified on the basis of an internal crack level and / or internal crack frequency and / or core porosity, the classification being carried out by comparing the tomographic ultrasound test with a standard series or preferably computer-assisted.