$27 set

The test block is designed according to the requirements of ultrasonic testing of austenitic forgings for pressure equipment in NB/T47013-2015 standard, which is suitable for testing thickness austenitic rigid forgings and austenite-ferrite duplex stainless steel forgings. The ultrasonic test block of nickel alloy forgings can be carried out by reference.

Test method: Refer to CS series test block. Select a set of suitable test blocks according to the thickness of the workpiece to be inspected and the standard requirements. The tested straight probe is placed on the detection surface shown in the diagram, and a group of φ2mm or φ3mm or φ4mm flat bottom holes (at least 3) with different detection distances are tested successively to make a straight probe range-amplitude curve, and this is used as the reference sensitivity. On this basis, a gain of 6dB is used as the scanning sensitivity