The SG Sorter System is designed to
characterize the quality of SG (spheroidal graphite) iron. The principle is based on
the propagation of ultrasound in the material. If the microstructure of SG iron is
not of the desired quality, the nodularity count is insufficient and the percentage of
graphite flakes increases. This quality deficiency is associated with a decreased
elastic modulus and thus a reduction of the average ultrasonic velocity of the material.
The SG Sorter System, using the
PCUS 10 pulser/receiver and digitizer board, is capable of accurately measuring the
ultrasonic velocity of the material, provided the thickness of the part at the test
location is known. A red or green indicator signals the completion of each
measurement. If the system determines ultrasonic velocities above the threshold
value, the green light indicates acceptable material conditions; the red light indicates
ultrasonic velocities below the preset threshold value indicating rejectable material
The system uses standard off-the-shelf
transducers, suitable for the thickness of the material to be tested custom search
units are not required.
The PCUS 10 P/R and Digitizer board (ISA) can
be installed in any PC, desktop or laptop, with a Pentium® processor (75 MHz or better,
16 MB RAM minimum) running under Windows© 95.